Transactions Of The American Institute Of Mining Engineers Vol Xxxii

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GKNKKAL PORFIKIO DIAZ, President of the United States of Mexico.

Traisactiois

Of The

Yol. XXXII.

Containing tiik Papers and Discussions of 1901, Uedating to the Mineral Eesources and Industries op Mbxioo.

New York City; Published By The Institute,

AT THK OFinOK OF THK SICORMTAKY.

Dedication.

In iukiiowlodiijincnt of the cordial hospitality extended to llu' visitiu,t>: lueiiiherB ol' the Institnte, at the Mexican meet- ing', (his volinne is dedicated to the President and the people of th(' Uui1.e.d Htates of Mexico.

Preface.

As ex])huuo(l on the title-page, this volume contains the ]iii[)ers of 11101 which deal, more or less directly, with the min- era-l resourcH's and industries of Mexico. It also contains the Pro(‘(H‘diiigs of the'Mexican meeting and anillustrated account ilK‘, Ex(uu*sions and Entcriainmeuts connected therewith.

'‘rhe othi'T papers ])resented at the Mexican meeting will he found in Volume XXXL

R. W . Raymond..

Contents.

Page

Officers and Honorary Members, ix

Members and Associates, . xii

List of Meetings, cix

Publications, ... cxi

Pules, cxiv

Peoceedincls.

Mexican Meeting, NTovember, 1901, exviii

Mexican Meeting, Excursions and Entertainments, cxxxix

Papers.

A Synopsis of the Mining Laws of Mexico. By Eichard E. Chism, ... 3

Oems and Precious Stones of Mexico. By George Frederick (Discus- sion, p. 568), 55

The Value of Ores in Mexico. By N. H. Emmons, 2d, 94

The Sierra Mojada, Coahuila, Mexico, and Its Ore-Deposits. By James W.

Malgolmson (Discussion, p. 566), 100

The Coal-Fields of Las Espcranzas, Coahuila, Mexico. By Edwin Ludlow, . 140 The Iron Mountain, and the Plant of the Mexican National Iron and Steel Com- pany, Durango, Mexico. By T. F. Witherbee, 156

The Geographic and Geologic Features, and their Relation to the Mineral Prod- ucts, of Mexico. By Robert T. Hill, 163

The Treatment of Olay -Slimes by the Cyanide Process and Agitation. By E. A.

H. Tays and F. A. Sciiiertz, 179

Notes on the Mines and Minerals of Guanajuato, Mexico. By William P.

Blake, 216

The Mining District of Pachuca, Mexico. By Ezequiel Ordon’EZ, . . . 224

Statistics of the Mining and Metallurgical Industry of the State of Nuevo Leon,

Mexico, 241

The Pachuca Stamp-Battery and Its Predecessors. By M. P. Boss, . . . 244

An Adobe Reverberatory Furnace. By John Gross, 248

Views of an Old Smelter in the State of Morelos, Mexico. By C. W. Pritchett, 251

The Mexican Railroad-System. By Victor M, Braschi, 259

The Patio Process for Amalgamation of Silver-Ores, By Manuel Valerio

Ortega, 276

Notes on the Structure of Ore-Bearing Veins in Mexico. By Edward Halse, . 285 Mexican Railroads and the Mining Industry. By Luis Salazar, . . . . 303

Notes on the Potable Waters of Mexico. By Ellen H. Richards, . . . 335

The Steel- Plant at Monterrey, Mexico. By William White, Jr., . . . 344

The Mechanical Feeding of Silver-Lead Blast-Furnaces. By Arthur S.

Dwight, 353

Notes on Certain Mines in the States of Chihuahua, Sinaloa and Sonora, Mex- ico. By Walter Harvey Weed, 396

Notes on a Section Across the Siorre Madre Occidental of Chihuahua and Sina- loa, Mexico. By Walter Harvey Weed, 444

vin

Contents.

Page

The District of Hidalgo Del Parral, Mexico, in 1820. By Norbeeto Domin- guez, 459

The Mineral Zone of Santa Maria Del Bio, San Luis Potosi, Mexico. By Jesus

P. Manzano, 478

A Study of Amalgamation Methods, Especially the Patio Process, with the

Object of Avoiding the Loss of Mercury. By Miguel Bustamente, Je., . 484 The Geographical and Geological Distribution of the Mineral Deposits of

Mexico. By Jose G. Agutileea, 497

Historical Sketch of Mining Legislation in Mexico. By Eduaedo Metinez

Baca, 520

Discussions.

Of Mr. Malcolmson’s Paper on The Sierra Mojada, Coahuila, Mexico, and Its

Ore-Deposits (see p. 100) , 56t>

Of Mr. Kunz’s Paper on the Gems and Precious Stones of Mexico (see p. 55), . 568

Glossary And Bibliography.

A Glossary of Spanish-American Mining and Metallurgical Terms. By Arthur

S. Dwight, 571

Bibliography of Mexican Geology and Mining. By Rafael Aguilar y

Santillan, 605

Index, 681

Amerigin Institute of Mining Engineers

Officers.

For year ending- February, 1903.

EBEN E. OLOOTT, 'New York City.

t)ice-|Jre0ibnt5.

CABLOS F. DE LAjSTDEBO Pachuca, Mexico.

JOHN E. HABDMAN Montreal, Canada.

JOHN HAYS HAMMOND New York City.

(Term expires February, 1903.)

S. F. Emmons

James Gaylby

J. Henry Lee

(Term expires February, 1904.)

.Wasliington, D. C. New York City. .Baltimore, Md.

itlanagers.

D. H. BACON Soudan, Minn.

E. V. D’INVILLIERS Philadelphia, Pa.

WILLIAM KENT Passaic, N. J.

(Term expires Iebruary, 1903.)

GEOKGE A. CBOCKEE New York ffity.

HORACE V. WINOHELL Butte, Monfc

CLEMENS C. JONES Richmond, Va.

(Term expires February, 1904.)

E. W. PARKER Washington, D. C.

JAMES W. NEILL Salt Lake City, Utah.

M. D. VALENTINE Woodbridge, N. J.

(Term expires February, 1905.)

Secretarg. ©reaenrer.

R. W. Raymond, Theodore D. Rand,

99 John St. New York City.

Philadelphia, Pa.

Past Officers.

PAST OFFIOEPuS.

Pbesidents?.

David Thomas 1S71

Ii. W. 1872

E. X . Raymonb .1873

B, W. Raymo>’-d 1874

A. L. Holley 1875

Abram S. Hewitt 1876

'T. Sterby Hunt 1877

“Eckley B. Coxe 1878

’Eckley B. Coxe 1879

William P. Shixx 1880

'William Hetcale 1881

"BrcHARL P. Both WELL 1882

Egbert W. Hext 1883

James C. Batles 1884

Jamies C. Bayles 885

Egbert H. Eichards 1886

Thomas Eglestox 1887

William B. Potter 1888

Ei CHARD Pearce 1889

Abeam S. Hewitt 1890

J OHX Bibkixbine 1891

JoHX Birhinbixe 1892

H. H. Howe 1893

JoHX Fritz 1894

D. Weeks 1895

E G. Spilsbuby 1896

Thomas jM. Drown 1897

C. IvIBCHHOEE 1 898

James Doeglas 1899

James Douglas 1900

E. E.Olgott 1901

Secretaries.

*Wartin Coryell 187 1-1872

Thomas M. Drown 1873-1883

E. W. Raymond 1884

Treasurers.

J. Pryor Williamson 1871-1872

Theodore D. Rand 1872

Deceased.

Honorary Members.

Honorary Members.

Pkof. Kichard Akermax Stockholm, Sweden.

Sir Lowthian Bell Middlesborougli, England.

Dr. Thomas M. Drown South Bethlehem, Pa.

Prof. Hatox de la Goupillibre Paris, Prance.

Prof. Haxs Hoefer Leohen, Austria.

Prof. Dr. Bruno Kerl Berlin, Germany.

Prof. J. P. Lesley Philadelphia, Pa.

M. Ploris Osmond Paris, France.

Prof. Dimitry Constantin Tschernoff St. Petersburg, Kussia.

Prof. Dr. Hermann Wedding Berlin, Germany.

Honorary Members (Deceased).

Castillo, A. Del 1895

Contreras, Manuel Maria 1902

Daubree, a 1896

Gaetzschmann, Moritz 1895

Gruner, L 1882)

Hunt, T. Sterry 1892

Le Conte, Joseph 1901

Patera, Adolph 1890

Percy, John 1889

PosEPNY, Franz 1895

Eichter, Theodor 1898

Egberts- Austen, W. C 1902

Serlo, Albert 1898

Siemens, C. Williams 1883

Thomas, David 1882

Turner, Peter E. uon 1897

Members And Associates.

(Pmbers aiul issoriates.

Corrected to January i, 1903.

THOSE .MARKED THUh ARE MEMBERS; MARKED THUS f ARE ASSOCIATES. THESE SIGNS DOUBLED INDICATE LIFE MEMBERS AND ASSOCIATES RESPECTIVELY. THE FIGURES AT THE END OP THE ADDRESS INDICATE THE YEAR OF ELECTION HEAVY-PA.CED TYPE SIGNIFIES HONORARY MEMBERSHIP.

Abadie, Emile K., Min. Engr., Genl. Mgr. and .,

Champion M. Co., 5’evada City, Cal. ’76 *Abbe, Cletelaki), Jb.j Teacher, Spec. Asst., U. S. Geol. Survey,

2017 I St., N. W., Washington, D. C. ’OO

Abbott, Ai Arthur Lansing, Mich. ’95

Abbott, Arthur V., Electrical Engr 10 Bridge St, New York, N. Y. ’82

"Abbott, James W., Min. Engr ‘‘The New Markham,” Denver, Colo. ’94

t Acker, E. O’C., Supt., Treatment Dept, Bethlehem Steel Co.,

South Bethlehem, Pa. ’86

*Adachi, JixzOO Katsuno Coal Mine, Chikusen, Japan. ’88

’Adams, G. L, Geologist U. S. Geol. Survey, Washington, D. 0. ’01

Abams, Henry, Genl. Mgr.. Cuban Mining Co South Bethlehem, Pa. ’02

't\DAMS, Mason T., Min. Engr., San Carlos Copper Co.,

Linares, N. L., Mexico. ’02

Ad AMS, Randolph, Min Engr., Genl. Mgr., Tennessee Copper Co.,

Copperhill, Tenn. ’90

Adams, Thomas J N. J. Zinc Co., 11 Broadway, New York, N. Y. ’02

Adams, Walter C., Min. Engr Bath Hotel, Montreal, Canada. ’99

*Adams, William H., Min. Engr. and Met, 18 Broadway, New York, N. Y. ’80 *Addicks, Lawrence, Elect. Engr., Raritan Copper Works,

Perth Amboy, N. J. ’02

*Addie, Robert, Engr. and Works Mgr.,

Calder Park, Baillieston by Glasgow, Scotland. ’98 Aertsen, Guilliaem, Genl. Mgr., Latrobe Steel Co.,

1200 Girard Building, Philadelphia, Pa.. ’88 *Agne\v, William C., Genl. Mgr., Mahoning Ore and Steel Co.,

Hibbing, Minn. ’00

Aguilar Ponciano, Min. Engr Estrella, Guanajuato, Mexico. ’01

*Ahbe, Frederic, Min. Engr Sunrise, Wyoming. ’97

Ahlers, Rudolph 0., Min. Engr.,

The Red Lodge, Mitcham, Surrey, England. ’99'

*Ahles, Robert L., Miner Oxford, N. J. ’02

AkeiTiian, Prof. Richard, Director Genl. and Chief of the Swedish Board

of Trade, Stockholm, Sweden. Akers, William A., Min. Engr., Room 521, Dooly Block,

Salt Lake City, Utah. ’89

Albergee, Louis R., Mech. Engr 95 Liberty Street, New York, N. Y, ’99

*Aldasoro, Andres, Min. Engr.,

Calle de Balderas 1026, Mexico City, Mexico. ’02*

Members A'Nd Associates.

*Aldbich, Truman H., Min. Engr., 2<1 Tice-Prest. Sloss-Slieffield

Steel and Iron Co., Birmingham, Ala. *Aldrich, Truman H., Jr., Min. Engr., Aldrich Mining Co.,

212 Hood Bldg. , Birmingham, Aia.

Audricii, William F,, Prest, Coal Aiming Co Aldrich, Ala.

*Aldridg-e, Walter H., Algr., Canadian Sm. Wks., Cons. Engr., Canadian

Pacific By., Trail, B. C., Canada.

Alexander, Curtis, Aletaliurgist Spearfish, So. Dak.

Alexander, George E., Chemist and Metallurgist,

1736 Champa St, Denver, Colo. *xAlexander, Henry B., Aline Algr , The Euth Alines, Ltd.,

P. O. Box 1, Sandon, B. C., Canada. *xAllan, John F., Alin. Engr., Genl. Algr., Alex. G. & B Kec. Co., Ltd., Alan. Dir., Alexico Venture Synd., etc., la Independencia 36,

Alexico City, Alexico.

*Allan, Leigh, Alin. Engr Pocatello, Idaho.

Allan, Thomas A, , Care Gibbs, Bright & Co. , 34 Queen St. ,

Melbourne, Victoria, xAustralia.

Allherdice, Taylor, Asst, in charge of Alanufacturing, Nat. Tube Co.,

Frick Bldg., Pittsburg, Pa.

*Allen, Anson AV., Supt, Steel Dept Pencoyd Iron Wks., Pencoyd, Pa.

*xA.llen, James, Alin. Engr Clyde Street, Dnnedin, New Zealand.

*Allen, John H., Aletallurgist 202 Edgar Place, Elizabeth, N. J.

*Allen, Egbert, Alet., Care A. E. Morgans, 293 St. George's Terrace,

Perth, AVestern iVustralia.

Allen, Theophilus, Aline Algr., Boom 3, 532 Alarket St.,

San Francisco, Cal.

*Allen, Walter W., Consulting Engr.,

Empire Bldg., Boom 1001, 71 Broadway, New York, N. Y.

Allison, Egbert, Betired Alfr. Alin. Alchy Port Carbon, Pa.

Almy, William F., Alin. Engr.,

Boom 315, Trust Bldg., 60 State St, Boston, Alass.

*Altiiouse, Harry AY., Alin. Engr Potts ville, Pa.

*Ambrosius, Carl E., Mine Owner, Ambrosius Hermanos,

Guanacevi, Durango, Alexico. *Ambrosius, Julius E., Mine Owner, Prest., la Cia. Alexicana de Aluebles- para Escuela, 3a, Calle de Pesado, Alexico City, Alexico. *x4msden, Frank F., Algr., Paxton Furnaces, Paxton 1. & S. Co.,

215 So. Front St., Harrisburg, Pa,

*xA.msden, Otto B., Min. Engr., Black Hills Belt Devel. Co.,

Lead, So. Dakota.

**Amy, Ernest J. H., Banker, Care H. Amy & Co.,

44 Wall St, New York, N. Y.

Andersen, Carl, Min. Engr Manvel, San Bernardino Co., Cal.

jVnderson, Frank, Alin. Engr., U. S. Dep. Min. Surv., Utah and Nevada,

7 Alasonic Bldg , Salt Lake City, Utah.

Anderson, J. K., Min. Engr Bramwell, W. Va.

**Anderson, John W Dunlow, West Aa,

*Anderson, John Wilkinson, Civ. and Min. Engr Dunlow, West Va.

*Anderson, Egbert Hay, Cons. Min. Engr., la Independencia No. 9,

Alexico City, Mexico

*Anderson, E. Wilson, Supt., Open Hearth Furnace, and Met. Engr.,

Carbon Steel Co , Pittsburg, Pa

U8

’96

’81

’S9

’84

’01

’97

’90

’99

’95

’92

’87

’89

’84

98

’94

’86

’86

’80

’02

’99

’99

’87

’93

’85

’97

’96

’99

’98

’02

’95

’96

Xit

Membebs Ast) Associates.

*Anpersox, William R, Concrete Cons., 47 Mitchell Bldg., Cincinnati, 0. ’01

RAndeewes, Edmaed, Maen Offeren Slate Quarry Co.,

Portmadoc, jS”. "Wales. ’01 *AiS(PRE\vs, C. R, Min. Engr. . ..Isaac’s Harbor, Guysboro’ Co., Nova Scotia. ’94 xAxTHOifY, E. G. Stanley, Min. Engr., R O. Bos: 186,

Rossland, B. C., Canada. ’00

*Antz, Eugene, Metallurgist Cuprum, Idaho ’99

Appleby, \Villia 3 I E 911 R E. Fifth Street, Minneapolis, Minn. ’90

Archbald, James, Cons. Engr 424 Jefferson Ave , Scranton, Pa. ’87

Archibald, Charles 32 Inglis St , Halifax, Nova Scotia, ’86

Archibald, Muneoe P. O. Box 25, Truro, Nova Scotia. ’98

*Arents, Albert 561 Railroad Avenue, Alameda, Cal. ’82

Argall, Philip P- O. Box 843, Denver, Colo. ’92

Arlett, George H., Min. Engr. and Metallurgist,

Apartado 159, Chihuahua, Mexico. ’00 Armas, Miltiades Th., Cons. Min. Engr., Care Louis Mori,

2 Eue de la Verrerie, Paris, France. ’96

Armstead, Henry H., Jr., Min. Engr. 25 Cliff St., New York, N. Y. ’00

Armstrong, John 0 40 Hunter St., Sydney, New South Wales. ’94

'ARxMStrong, Thomas, Mineral Draughtsman,

Surveyor General’s Office, Phoenix, Ariz. ’95 *ARNAtTD, Georges, Genl. Mgr. , Gallia Sent Antal G. M. Co. ,

Verespatak, Hungary, Austria. ’91

*AenberGj C. T Wheeling Steel and Iron Co., W’’heeling, W. Va. ’81

Aeozarena, Rafael M. de, 2da Calle de las Estaciones Esquina del

Encino, Mexico City, Mexico. ’ 98

Arthur, Edwarl P., Jr Bi-Metallic Bank, Cripple Creek, Colo. ’97

Ashley, George H., Prof, Geology and Biology, College of Charleston,

Charleston, S. C. ’99

*Ashley, H. H., Pres Parrish Coal Co., Wilkes-Barre, Pa. ’94

Ashmore, Ernest P., Min. Engr ...59 Lansdowne St., Hove, Sussex, Eng. ’00 Ashmore, G. Percy, Min. and Met. Engr.,

59 Lansdowne St., Hove, Sussex, England. ’97" **Ashton, Frank, Min. Engr., ‘Ashton & Dockery,”

Apartado 52, Chihuahua, Mexico. ’00 *Astley, John W., Supt, Snowshoe Gold and Copper Mines, Ltd.,

Phoenix, B. C., Canada. ’91

Atha, Benjamin, Pres., Benj. Atha Co. (Crucible Steel Co. of America),

Newark, N. J. ’84

Atherton, T. "W. T., Min. Engr., Ivory Coast Mining Co., Assinie,

West Africa, and Anerley, London, S. E., England. ’92

Atkins, Horace H., Jr 711 Seventeenth Ave., Denver, Colo. ’99'

Atkins, William Potts vi lie, Pa. ’81

Atkinson, Louis W., Min. Engr , Supt Marmet Co., Marmet, W. Va ’94

Attwood, G., Cons. Min. and Civ. Engr., 13 Sise Lane,

Queen Victoria, Lond,on, E. C., England. ’75

Atwater, Richard M., Jr., Min. Engr Nelson, B. C., Canada. ’97

Agbitby, Lewis E., State Mineralogist Terry Bldg., San Francisco, Cal. ’00*

Austin, J. B., Min. Engr Santa Barbara, Cal. ’83

Austin, Kenneth, Cons. Engr...P. 0. Box 2154, Johannesburg, So. Africa. ’97

Austin, Leonard S El Paso Sm. IVks., El Paso, Texas. ’94

*Austin, T. S., Supt. El Paso Plant, Am. Sm. & Bef. Co. .El Paso, Texas. ’83-

Members Axb Associates.

Austin, 'W. Lawrence, Min. Engr. and Aletallurgist,

200 West 57tli St., Xew York, X. Y. ’82

*Ayers, Fredeuic G 16 AVeymouth vSt., Adelaide, So. Australia. ’98

Ayres, W. S., Min. and Mecli. Engr Hazleton, Pa. ’73

Ayton, Eryest F Apartado 67, Mexico City, Mexico. ’95-

Babbitt, Thomas D., Min. Engr Boise, Idaho.

Bache, Franklin, Min. Engr., Pres. AIcAIester Coal Co.,

Alderson, Ind, Ty., and 505 Land Title Bldg., Philadelphia, Pa.

*Bachman, David I Box 136, Keystone, Mh Va.

Bachman, F. E Port Henry, X. Y.

*Bacon, Don H., Chairman, Tennessee Coal, Iron & E. R. Co.,

100 Broadway, XeAv York, X. Y.

Badger, Harry S. , Cyanide Operator, Isaacs Harbor, Guysboro Co. ,

Xova Scotia.

*BADLAivr, Stephen, Asst. Siipt., Merchant Mill Dept., Pennsylvania Steel

Co., 309 Pine St., Steelton, Pa.

*Baer, George F., Pres., Phila. & Beading Terminal E’way Co.,

Reading Terminal, Philadelphia, Pa. **Baggaley, Ralph, Coke Manufacturer, Copper Mner and Smelter,

Tradesmen Bldg., Pittsburg, Pa. Bagge, Xils 0., Mgr., Black Diamond Copper M. Co.,

Black Diamond, via Pearce, Ariz.

*Bailey, B. X., Civ. Engr ‘The Gladstone,” Philadelphia, Pa.

*Bailey, Charles, Chairman, Reliance Steel Casting Co., Ltd., Pittsburg, Pa.

Bailey, Charles E., Min. Engr Eveleth, Minn.

*Bailey, Edward, Iron Mfr. and Banker Harrisburg, Pa.

*Bailey, Edward Trenholm, Min. Engr., Royal Colonial Inst.,

Northumberland Ave., London, W. C., England.

Bailey, J. Trowbridge, Min. Engr 141 Broadway, Xew York, X. Y".

*''Bailey, James B., Pres Chas. L. Bailey Co., Inc., Harrisburg, Pa.

*Bain, Hugh A P. 0. Box 931, New York, N. Y.

*Bain, H. Foster, Min. Engr Box 672, Cripple Creek, Colo.

*Baird, Dudley, Metallurgist Penn Min. Co., Campo Seco, Cal.

*Baker, C. 0., Jr., Platinum Refiner, Baker & Co., Ltd.,

120 Liberty Street, New York, X. Y. *Baker, David, Gen. Mgr., Dominion Iron & Steel Co., Ltd.,

Sydney, C B., Nova Scotia, Canada.

*Bakeb, Frederick B., Min Engr Republic Coal Co., Athens, Ohio.

*Baker, James H., Min. Engr 901 X. Ochoa St., El Paso, Texas.

*Bakee, Thomas T 414 West Quartz St , Butte, Mont.

Baldwin, Walter J Romansville, Pa.

*Ballou, Franklin, Mgr , Bi-Metallic Plant, Leadville, Colo , Am. Sm. &

Ref. Co., 501 Boston Building, Denver, Colo.

*Balta, Jose., Min, Engr Director de Fomento, Lima, Peru, So. Amer.

Bancroft, George J., Min. Engr 1515 Stout St., Denver, Colo.

*Bang, Henry A., Mech. Engr 1186 Broadway, New York, X. Y.

*Banks, Edwin G., Metallurgist, Waihi G. M. Co., Ltd.,

Waihi, Auckland, New Zealand. *Banks, John H., Min. Engr. and Chemist, Ricketts & Banks,

104 John Street, New York, X. Y.

Members Axd Associates.

Banks, Noble C., Min. and Met. Engr., Care of Geo. Mestingliouse,

'Westinghoiise Bldg., Pittsburg, Pa. ’97 Henry C., Min. Engr. and Aline Algr.,

Bellevue Prop., Ltd., Alt. Sir Samuel, Mestern Australia. ’90

I-Barber, 'William B., Alin. Engr 1421 High St., Alameda, Cal. ’01

’Barbovr, Thomas X, Gold Dredging and Alining, Risdon Iron AVorks,

San Francisco, Cal. ’97

Barclay, Thomas H The Tyre Copper Co., Ltd., Ladysmith,

B. C., Canada. ’00

*Bardwell, Alonzo F., Alin. Engr., Assayer and Chemist,

318 Cooper Ave., xAspen, Colo. ’89

Barker, Henry A., Chemist Hedges, Cal. ’02

Barker, Samuel, Jr., Alin. Engr . ...Pennington & Barker, Butte, Alont. ’00

"Barksdale, H. AI Repauno Chemical Co., Wilmington, Del. ’94

Barnett, Leon H Casein Co. of America, Bellows Palls, Vt. ’97

*Barnett, AIaurice Electric Boat Co., 100 Broadway, New ATork, N. Y. ’93

Bx\rnett, AVilliam I., Cons. Alines Selection Co.,

8 Throgmorton Ave., London, E. C., England. ’02 Barney, AIontagu T., Alin. Engr., .Aukobra Tagwa & Abosso Co.,

13 Austin Friars, London, England. ’01 Barnhart, G. H., Supt...The Ymir Gold Mines, Ltd., Ymir, B. C., Canada. ’93

*Barr, X N., Alech. Supt 335 Old Colony Bldg., Chicago, 111. ’84

*Barrell, Robert AV 1225 Spruce St., St. Louis, Mo. ’99

Barren, Henry A., Supt., Newburgh Steel Wks., Am. Steel and Wire Co.,

201 Miles xAve., Cleveland, Ohio. ’02 Barringer, Daniel AL, Alin. Engr. and Geologist, 460 Bullitt Building,

Philadelphia, Pa, ’90

Barron, George D., Prest. and Genl. Algr Box 194, Harrison, N. Y. ’01

Barrows, AV alter A., Jr., Genl. Algr. Blast Furnaces,

Shenango Furnace Co., Sharpsville, Pa. ’90

*Bartlett, James H., Alan. Dir Am. Assn., Inc., Middlesboro, Ky. ’85

Bartlett, Josiah C,, Supt., C. B. Q. Relief Dept.,

209 Adams St, Chicago, Til. ’77

IBartnett, Walter J., Pres., San Francisco & San Joaquin Coal Co.,

Safe Deposit Bldg., San Francisco, Cal. ’99

Bartol, George, Genl. Algr The Otis Steel Co., Ltd., Cleveland, Ohio. ’79

*BaSxSett, AAilliam H., Chemist Coe Brass AInfg. Co., Torrington, Conn. ’92

Batchelder, Chester S. , Assayer and Chemist,

512 Peyton, Bldg., Spokane, Wash. ’OO Batchelder, Joseph F., Auditor, Portland By. Co.,

P. 0. Box 103, Portland, Ore. ’00

*Batcheller, Henry E Box 21, Washington, N. H. ’95

Batcheller, James H., Assayer and Chem., Spearfish G. M. & Bed. Co.,

Cyanide, Lawrence Co., So. Dak. ’00 Batchelor, OwenS., Alin. Engr., Hill Top Min. Co.,

Kamloops, B. C., Canada. ’99

Batchelor, AVm. T., Civil and Min. Engr.,

Gormanston, West Coast, Tasmania. ’02

fBATESON, Chas. E. W., Student 257 AVest 88th St., New York, N. Y. ’01

Batz, Baron Bene de 36 Bue de Tocqueville, Paris, France. ’95

*Baumann, Albert P., Min. Engr. and Supt., Brookfield Min. Co., Ltd.,

North Brookfield, Nova Scotia. ’99

Members And Associates.

XTll

Bayles, Feederick P,, Min. Engr., Am. Sm. & Kef. Co.,

512 Boston Bldg., Denver, Colo. 97 *Bayliss, Rawlinson T., Min. Engr.. ..11 Cornhill, London, E. C,, England. ’89

*Beal, Latham 0 Dunedin, New Zealand. *98

Beale, Addisoy H., Supt., Open Hearth Furnaces Yandergrift, Pa. ’01

"Beals, AVilliam, Jr., Min. Engr., Geol 20 Central St, Boston, Mass. ’97

*Beah, Irving M., Pres., Northwestern and Spring Lake Iron Cos.,

Pabst Building, Milwaukee, Wis. ’92 ’Beardsley, George F., Met ,'Mt. Lyell Min. and Ky. Co., Ltd.,

Queenstown, Tasmania. ’90

'Beatty, A. Chester, Min. Engr 521 McPhee Building, Denver, Colo. ’96

*Beckeb, George F., Geologist.!!. S. Geological Survey, Washington, D. C. ’93

Becker, Theodore Teliuride, Colo. ’01

Beckett, James A., Genl. Supt, Walter A. Wood Mowing and

Reaping Co., Hoosick Falls, N. Y. ’97 Behr, Hans C., Cons. Mech. Engr., Consol. Gold Fields of So. Africa, Ltd.,

P. 0. Box 1167, Johannesburg, Transvaal, So. Africa. ’00 *Bel, J. Marc, Min. Engr., Secy. , Socidt des Ingenieurs Civils de France, etc.,

4 Place Denfert-Kochereau, Paris, France. ’84 *Belden, Sanford B., Mgr., The Jeflfrey Manfg. Co., Columbus, 0.,

402 Times Bldg., Pittsburg, Pa. ’01

*Belin, Henry, Jb., Powder Mfr Connell Building, Scranton, Pa. ’87

Bell, Alan D., Min. Engr .St Joseph Lead Co., Bonne Terre, Mo. ’95

*Bell, Charles Lowthian, Engr., Clarence Iron Works,

Middlesborough, England. ’97 *Bell, George A., Marion Malleable Iron Wks..P. O. Box 506, Marion, Ind. ’88

*Bell, James Mackintosh, Geologist Geol. Survey, Ottawa, Canada. ’02;

**Bell, Jno. W Care Stanley Mine, Idaho Springs, Colo. ’99

Bell, Sir Lowtliian, Iron Master Middlesborough, England-

*Bell, Dr. Robert, Dir Geological Survey, Ottawa, Canada, ’85

*Bellam, Henry Lynch, Assayer & Chem Wadsworth, Nev. ’96

‘Bellinger, Herman C., Metallurgist Crofton, B. C., Canada. ’91

*Bellinger, H. P., Solvay Process Co., Syracuse, N. Y.,

1902 W- Genesee St., Syracuse, N. Y. ’89

*Belshaw, Charles M., Mine Owner. Antioch, Contra Costa Co., Cal. ’99

Benedict, William de L., Min. Engr. 43 Cedar St., New York, N. Y. ’83

Benjamin, Edward H., Min. Engr. and Secy., Cal. Miners’ Ass’n,

331 Pine St., San Francisco, Cal. ’99

*Bennet, T. a 6 Drapers Gardens, London, E. C., England. ’90

fBENNETT, Russell M., Iron and Mineral Lands, 604 New York Life

Bldg., Minneapolis, Minn. ’95

*Benneville, James S. de. Analytical Chemist, University Club,

1510 Walnut St.,* Philadelphia, Pa. ’97 Benson, Alexander, Min. Engr , Room 34, Broad Street House,

New Broad St, London, E. C., England. ’90 *BBNStrSAN, E, V., Min. Engr., Effuenta (Wassaw) Mines, Ltd., Tarkwa,

Gold Coast, West Africa. ’92

*Bent, Felton, Pres - Solid Steel Casting Co., Chester, Pa, ’02

*Bentley, George Rolland, Genl. Supt. Central Iron and Steel Co. ,

Harrisburg, Pa. ’96

*Bentley, Robert, Pres., The Carbon Limestone Co., Secy., Ohio

Iron and Steel Co., Lowellville, Ohio. ’84 B

Xviii MEMBERS AND ASSOCIATES.

*Bekton, C. W., Min. Engr., Genl. Mgr., The Tenero M. & M. Co. and

The Washington M. Co , Santa Lucia, Honduras, C. A. ’97

*Berg, P. T., Mech. Engr Homestead Steel Works, Munhall, Pa. ’90

BEBKEir, John Boulder, Jefierson Co., Mont. ’00

Bermingham, Jno , Jr., Supt Cal. Powder Works, Pinole, Cal. ’02

Bereay, Niles S., Supt The United Globe Mines, Globe, Ariz. ’99

*"Berey, J. P P. 0. Box 1160, Johannisburg, So. Africa. ’93

Bertolet, Alfred S., Care Wm. S. Bates, 269 Dearborn St., Chicago, 111. ’75 'Best, John W., Treas. and GenL Mgr., Northern Coal and Coke Co.,

Iron Bldg. , Denver, Colo. ’ 99 *Betts, Anson G., Metallurgist... . Canada Sm. Wks., Trail, B. C., Canada. ’01 Beyer, Samuel W.,Pro£. Geology and Mining Engineering,

Iowa State College, Ames, Iowa. ’ 98

'Biddle, William F 209 S. Third St., Philadelphia, Pa. ’81

Bien, Joseph E., Secy., Julius Bien & Co. , 140 Sixth Ave., New York, N. Y. ’86 f B igelow, A. S., Pres., Boston & Montana M. Co., Tamarack M. Co., etc.,

Sears Bldg., Boston, Mass. ’88

'Bigelow, David E 2333 Channing Way, Berkeley, Cal. ’01

*Bigler, S. Haldeman, Chemist Eobesonia Iron Co., Kobesonia, Pa. ’02

*Bildt, Carl W Jernkontoret, Stockholm, Sweden. ’86

*Bilharz, Oscar M., Min Engr., Supt., Doe Eun Lead Co., etc..

Fiat Eiver, Mo. ’92

Billin, Charles E., Pres., Am. Engineering Wks.,

204 Dearborn St., Chicago, 111. ’75

Billings, G. H., Metallurgist 293 Commonwealth Ave., Boston, Mass. ’77

*Bird, Arthur H. S., Mine Mgr. and Supt., Care McCormick & Co.,

Salt LakeCity, Utah. ’97

*Bird, Frank A., Custom Assayer and Analytical Chemist,

P. O. Box 69, Park City, Utah. ’98 Bied, Egbert M., Supt., El Oro Min. and By. Co., Ltd., El Oro, Mex- ico, and Care The Exploration Co., Ltd., 11 Cornhill, London, England. ’97 *Birkinbine, John, Min. and Civ. Engr., Odd Fellows’ Temple,

Philadelphia Pa. ’75

*Bishop, James 12 Custom House, Quay Wellington, New Zealand. ’93

*Black, Egbert S., Min. Engr.,

529 Collins St., Melbourne, Victoria, Australia. ’98 Blackstone, Eichard, Chief Engr., Homestake Mining Co..Lead, So. Dak. ’90 Blackwell, Francis 0., Elect. Engr., General Electric Co.,

Schenectady, N. Y. ’92

''Blair, Andrew A-, Analytical Chemist, Booth, Garrett & Blair,

406 Locust St,, Philadelphia, Pa. ’75

IBlake, C. G., Coal and Coke First Nat, Bank Bldg., Cincinnati, Ohio. ’86

*Blake, Francis H-, Min. Engr 43 Cedar St., New York, N. Y. ’84

*Blake, Theodore A New Haven, Conn. ’80

Blake, Prof. William P., Dir., Ariz. School of Mines, Territorial Geol- ogist, Tucson, Ariz. (Summer address, New Plaven, Conn.) ’71 Blakemore, George H., Min. Mgr., Met. and Cons. Engr., Great Cobar

Copper Mining Synd., Cobar, New South Wales. ’97 *Blakeslee, Frank A., Min. Engr., Gt. Boulder Perseverance G. M. Co.,

Kalgoorlie, Western Australia. ’97

*Blandy, John F., Min. Engr Prescott, Ariz, ’71

Blandy, S. H. B., Min. Engr., Silkstone Colliery, Molteno, Cape Colony,

So. Africa. ’02

Membees And Associates.

Blatchfoed, Johx, Supt. of Mines, Golden Keward Con. G. M. and M. Co.,

Beadwood, So. Dak. ’97

*Blatjvelt, Harrington, Min. Engr. and Met., Supt., Cash Mine Co.,

Prescott, Ariz. ’71

*Blauyelt, William H., Genl. Mgr. and Engr , Semet Solvay Co.,

Syracuse, NT. Y. ’87

*Bliss, Collins P., Prof, of Mech. Engineering, Xew York University,

University Heights, Yew York, Y. Y. ’97

*Block:, H. W. C 1804 Warren St., St. Louis, Mo. ’86

*Blood, George Deroy, Min. Engr.. ..134 First St, Salt Lake City, Utah. ’93 *Blow, a. a., Cons. Engr. , Ecuadorean Ass’n and to Australian Sm. and

Eef. Co., 2 Cowper’s Court, London, E. C., England. ’82

Blue, John, Supt of Mines Eustis Mining Co., Eustis, Quebec, Canada. ’88

Bluett, A. Yewton, Oaklia, Chaucer Eoad, Bedford, England. ’96

*Bodfish, Frederick V Victor, Colo. ’01

fBoDWELL, Ernest Y., Lawyer Victoria, B. C., Canada. ’00

Boehmer, Max., lin. Engr 42 Jacobson Bldg., Denver, Colo. ’84

*Boggs, William E., Jr., Chemist and Met., Societe des Mines d’Allen

La Bastide de Serou, Arige, France. ’82

*Bohn, a. K., Min. Engr. and Met P. 0. Box 555, Leadville, Colo. ’94

Bohn, Charles A., Min. Engr. and Mgr., Dolores M. & M. Co., Dolores.

Hidalgo, E. de Guanajuato, Mexico. ’93

*Boies, Henry M., Pres The Moosic Powder Co., Scranton, Pa. ’87

Bolles, J. H P. 0. Box 235, Colorado Springs, Colo. ’92

*Bolles, Eichard J P. O. Box 598, Colorado Springs, Colo. ’93

*Bolton, Charles C Care M. A Hanna & Co , Cleveland, Ohio. ’95

*Bonand, Eene de, Cons. Engr 17 Eue St. Marc, Paris, France. ’97

*Bonestell, H. S., Assayer and Accountant, Mt. Bullion, Mariposa Co., Cal. ’99

Bonillas, Ygnacio, Min. and Civ. Engr Yogales, Sonora, Mexico. ’91

Bonwick, Edwin ATalter, Min. Engr., Care Bewick Moreing & Co.,

P. 0. Box 337, Auckland, Yew Zealand. ’02 *Bonzano, Adolphus, Civil and Mech. Engr.,

331 So. Eighteenth St , Philadelphia, Pa. ’86

**Booraem, Egbert E., Min. Engr 267 Fifth Ave , Yew York, Y. Y. ’87

Boorne, William H.,

15 Lawn View, Eectory Ed., Walthamston, Essex, England. ’99 *Booth, Franklin, Min. Engr., V.-Pres., Levi Booth & Sons, Inc.,

338 Y. Main Street, Los Angeles, Cal. ’92

*Borbely, Led wig, Genl. Mgr Darlorinharutza 8, Budapest, Hungary. ’00

Borchers, Dr. Wilhelm Ludwigsallee 15, Aachen, Germany. ’01

*Borden, Gideon S., Min. Engr Glen Jean, W. Va. ’02

*Borgner, Cyrus, Mfg. , Fire Brick and Clay Eetorts,

23d St. above Eace., Philadelphia, Pa. ’02

Borrow, Frank K 38 Yevern Square, London, S. W., England. ’01

*Bosch, Anton Friedberg str. 27, Charlottenburg, Germany. ’02

*Bo80O, Francis W. , Chemist, Assayer, 1932 So. Sherman Ave. , Denver, Colo . ’ 02

Bosqui, Francis L., Met Engr. Boss, Marin Co., Cal. ’97

Bottomley, H., Deputy Inspector of Mines,

Band Club, Johannesburg, So. Africa. ’02 **Bouoher, Arthur S., Min. and Civ. Engr., Sharpcliffe Hall, Ipstones,

Staffordshire, England. ’94 Bowden, James E., Mine Supt 50 Trinity St, Yewton, Y. J. ’02

Members Anb Associates.

*Bowden, Josiah J Elkhorn Silver M. Co., Elkliorn, Mont. ’01

Boweb, Charles P., Civil Engp 2028 No. 29tli Street, Philadelphia, Pa. ’94 Alexander, Genl. Algr Caledonian Coal Co., Gallup, New Mex. ’90 fBoAVLES, Henry Thornton, Student ..249 W. 107th St., New York, N. Y'. ’02

♦Bowling, Jasper H ,..Harriman, Tenn. ’01

Bovtron, Charles E., Min. Engr Birmingham, Ala. ’93

*Bowbon, James 1401 So. Twentieth St., Birmingham, Ala. ’78

*Boyd, Auglstus W., Min. Engr Erie, B. C., Canada. ’01

fBoYD, Frederick J., Shift Boss Sombrerete, Zacatecas, Mexico. ’02

*Boyd, John Y Jas. Boyd & Co., 222 Market St., Harrisburg, Pa. ’86

*Boyd, Thornton M., Assayer,

Tasmania Reduction Works, Beaconsfield, Tasmania. ’01 Boyd, Villiam Sprat, Min. Engr., Broken Hill Proprietary Co.,

Broken Hill, New South Wales. ’02 fBoYNTON, Henry C., Asst. Instructor in Metallurgy,

24 Reads Block, Cambridge, Mass. ’01 *Boyt, Jno.j Dom. Iron & Steel Co-, Ltd., Sydney, Cape Breton, Nova Scotia. ’02

Braden, William, Min. Engr Velardeha, Durango, Mex. ’98

Bradford, Robert H., Prof, of Metallurgy, Center Ward,

Salt Lake City, Utah. ’02

Bradford, Seymoeb K., Min. Engr Tonopah, Nye Co., Nevada. ’02

Bradley, Frederic W., Min. Engr Crocker Bldg., San Francisco, Cal. ’91 *Bradley, George L 1503 Twenty-first St., N. W., Washington, D. C.

(Summer address, Pomfret Centre, Conn.) ’74 Bradley, John C., Genl. Supt., Pratt & Letchworth Co.,

189 Tonawanda St., Buffalo, N. Y. ’99

Bradley, Richard J. H., Min. Engr.,

Care S. Blum, 320 Pacific Block, Seattle, Wash. ’02 *BBADLEy, Walter Wadsworth, Min. Engr.,

Care Ifinhig and Scientific PreeSj 330 Market St., San Francisco, Cal. ’02

*Bradley, William H., Engr Nat. Tube Co., Wheeling, W. Va. ’89

*Bradshaw, Frederick, Mgr. of Mines, Santo Domingo S. M. Co.,

Batopilas, Chihuahua, Mexico. ’02

*Bbady, James, Min. Engr Golden, East Kootenay, B. C., Canada. ’96

*Branner, John C., Prof, of Geology and Vice-Pres ,

Leland Stanford University, Stanford University, Cal. ’84 *Braschi, Victor M., Engr. and Cont..Apartado 830, Mexico City, Mexico. ’91

*Bbassert, H. a Edgar Thomson Steel Works, Brad dock, Pa. ’99

*Bratnobeb, H 43 Threadneedle St, London, E. C., England. ’87

*Bbeen, James Spokane Hotel, Spokane, Wash. ’87

*Breisch, Ernest E., Min. Engr., care Jas. W. Ellsworth & Co.,

Ellsworth, Pa. ’96

*Brendel, Robert, Genl. Supt. of Mines, M. Guggenheim Sons, Apartado B.,

Aguascalientes, Mexico. ’08

*Brennon, John C., Asst. Min. Engr.,].Graud Central Co., Ltd.,

Torres, Sonora, Mexico. ’01

**Beet, Jean le 148 Boulevard Haussmann, Paris, France. ’9S

*Bretherton, George K York, Mont. ’ 00

**Bretherton, S. E., Met Kendrick Promotion Co., Denver, Colo. ’89

*Bretherton, Walter L., Operator and Mgr., W. A. Clark’s Coal Mines,

Clarkville, New Mex. ’87

*Brett, Alfred J., Windyliall, Blenheim Gardens,

Wallington, Surrey, England. ’02

Members And Associates.

**Brewek, x\ K., Met., Supt. Cia. Minera Fundidora j Afinadora

‘Monterey/’ Monterey, Mexico. 97

fBREWER, Egbert Edward, Student 320 Marlboro St., Boston, Mass. '02

*Brewer, William M., Min. Engr., Northwestern Sm. and Eef. Co.,

P. O. Box 571, Tictoria, B. C., Canada. '93 Bridge, Samuel B. , Assayer and Chemist .Apartado 50, Monterey, Mexico. ’ 01

*Briggs, Boswell E., Civil Engr Calle G-ante tj, Mexico City, Mexico. '01

**Bbinell, JoHAJt A., Chief Engr...Fagersta Bruks Co., Fagersta, Sweden. '98 Brinker, Arthur C., Min. Engr., E. E. Burlingame & Co.,

1738 Lawrence St., Denver, Colo. ’01

**Brinsmade, Egbert B., Min. Engr 4429 Morgan St., St. Louis, Mo. '99

**Britt, Eichard H., Mine Mgr., Poorman G.M., Ltd , Silver City, Idaho. ’98 *Britten, Thomas J., WolhuterGold Mining Co., Johannesburg,

Transvaal, So. Africa. '95

*Broad, Wallace, Geol. and Min. Engr.,

Care Hong Kong and Shanghai . Corp., Shanghai, China. '01

*Brock, Arthur Lebanon, Pa. '87

*Broce:, Charles, Pres Boonton Iron and Steel Co., Boonton, N. J. '81

*Brockunier, Samuel H , Mining Engr Wheeling, W. Ya. '00

*Broden, Albert, Supt., Blast Furnaces Beading Iron Co., Beading, Pa. '89

*Brodie, Walter M., Min. Engr. and Met., Puente Espiritu Santo No. 1,

Mexico City, Mexico. '72

*Bromly, Alfred H., Min. Engr 18 Eldon St, London, E. C., England. ’97

*Brooe;e, Egbert E., Blast Furnace Mgr. Birdsboro, Berks Co., Pa. '02

**Brooks, Alfred H., .Geologist U. S. Geol. Survey, Washington, B. C. '00

*Bbophy, James, Mine Operator Coopers, W. Ya. '01

*Browx, Alexander E Brown Hoisting Machinery Co., Cleveland, Ohio. '75 **Brown, Amos P., Prof., Geology and Mineralogy, Univ. of Pennsylvania,

Philadelphia, Pa. '88

**Brown, Archibald T., Cons. Min. Engr., 372 Flinders Lane,

Melbourne, Australia. '91

*Brown, Arthur H., Met, Canadian Gold Fields, Ltd,,

Deloro, Ont, Canada. '02

*Brown, Austin H., Jr., Geni. Mgr. and Cons. Engr., Trinity Copper Co.,

Kennett, Shasta Co., Cal. '92 *Bro'WN, Cony T., Mgr., Mine Development Association, Socorro, New Mex. ’00

*Brown, Donald C Apartado 132, San Luis Potosi, Mexico. '01

*Brown, E. G., Genl. Supt., Chest Creeks Land and Improvement Co.,

Patton, Cambria Co., Pa. '86

*Brown, Edward L., Tieas. and Supt., Chicago Drop Forge and Foundry Co.,

Kensington, 111. '81

*Brown, E. Percy, Min. Engr Bridgewater, Nova Scotia. '98

*Brown, Elwin F., Genl. Mgr Pewabic Co., Iron Mountain, Mich. '91

fBROWN, Fayette, Prest. of Manufacturing Cos.,

Perry-Payne Bldg., Cleveland, Ohio. '75 *Brown, Frederick: C., Genl. Mgr., Komata Beefs G. M. Co., Ltd.,

Komata, via Paeroa, Auckland, New Zealand. '00 BrowNj Harvey H., Mfr., Harvey H. Brown & Co., 301 Perry-Payne

Bldg., Cleveland, Ohio. '76 Bbown, Horace F., Min. and Mech. Engr 130 Ninth St, Oakland. Cal. '95 fBROWN, Lewis Y., Mgr., Blast Furnace... ..Star Furnace Co., Jackson, Ohio. '90 *Brown, Lucius P., Analytical Chemist and Geologist Nashville, Tenn. ’95

Members And Associates.

Beowx, Raymond, Mgr Duquesne Reduction Co. , Pittsburg, Pa. ’95

*Beowk, R. Gilman, Genl. Mgr., Standard Cons. Mining Co.,

310 Pine St., San Francisco, Cal. ’89 Beown, T, Fostee, Min. & Civ. Engr., Guildhall Chambers, Cardiff, So.

Wales, England. ’86

*Beown, Walter S., Min. Engr 1627 Polk St., San Francisco, Cal. ’02

*Brown, William, Supt., Steel Plant 64 First Ave., Coates ville, Pa. ’91

*Beown, William Clinton, Chief Engr., Henry R. Worthington Co.,

Brooklyn, K Y. ’95

Brown, W'lLLiAM S,, Min. Engr., Care W. Queen, 3 Tudor St.,

Ludgate Circus, London, E. C , England. ’94

'Browne, AbthueB., Min. and Met. Engr Sumpter, Oregon. ’93

*Browne, David H 115 Archwood Ave, Cleveland, Ohio. ’00

fBROWNE, Robert M., Civ. Engr 58 St. John St, Launceston, Tasmania ’96

*Beowne, Ross E., Min. Engr Nevada Block, San Francisco, Cal. ’94

Browning, Walter Jas., Min. Engr., Apartado 101, Monterey, Mexico. ’02 *Brownlee, Archibald G., Mine Expert, 930 Washington Ave.,

Denver, Colo. ’97

Brunton, D. W., Cons. Engr., Anaconda Copper M. Co., Butte, Mont, and

214 Boston Bldg., Denver, Colo. ’83

’Beyan, Leke W South McAlester, Ind. Ty. ’01

*Buck:, Rebus, Mn. Engr Dawson, N. W. Ty. ’97

♦Buck:, Stuaet M., Pres, and Genl. Mgr., Sagamore Coal & Coke Co.,

Bramwen, W. Va. ’71

fBucK, Yictoe B., Jr 801 Edgeware Road, Los Angeles, Cal. ’98

**Buckley, Ernest R., State Geologist, Director of the Bureau of Geology

and Mines, Eolla, Mo. ’02

*Bedd, Frederick E., Chemist, Spring Valley Iron & Ore Co.,

Spring Valley, Wis. ’99

*Bedbo'W, Lester R., Min. Engr., Guggenheim Exploration Co.,

Santa Barbara, Chihuahua, Mexico. ’02

*Bedeow, W. B Care Phila. Plant, Am. S. & R. Co., Pueblo, Colo. ’00

*Behl, Frank H., Pres Sharon Steel Co., Sharon, Pa. ’91

*Bekoezer, Edwin, Metallurgist, Kentucky Iron Co., Paducah, Kentucky. ’01 *Belkley, Frank, Genl. Mgr., The Robinson Cons. M. & Sm. Co.,

Robinson, Colo. ’89

*Belkley, Frederick G., Mine Owner and Mgr., Penrose, Tam O’Shanter,

and The New York Mines, 408 Equitable Bldg., Denver, Colo. ’82

*Belkley, Henry W 141 Broadway, New York, N. Y. ’79

*Bulley, Reginald H., Genl. Mgr Canton Steel Co., Canton, Ohio. ’78

*Bunker, Charles E. , Asst. Supt... Keystone Cons. Mine, Amador City, Cal. ’00 Berbidge, Frederick, Mine Mgr., 51 0 Empire State Bldg., Spokane, Wash.. ’ 87 *Beech, Albert, Mgr., Bunker Hill and Sullivan M. and Concent. Co.,

Kellogg, Idaho. ’00

*Berchell, H. C., Government Engr St. John’s, Newfoundland. ’83

fBuRDEN, Henry, 2d., Pres Cazenovia Natl. Bank, Cazenovia, N. Y. ’92

*Berden, H. H Trojan Car Coupler Co., 36 Wall St., New York, N. Y. ’83

*Bekden, James A Woodside, Troy, N. Y. ’76

Berger, Clarence C., Min. Engr., Cook Turner Co.,

25 Broad St., New York, N. Y. ’97

*Bergess, John DeW., Cons. Min. Engr. P. 0. Box 747, Tucson, Ariz. ’00

fBuKKE, M. D 404 Pike Bldg., Cincinnati, Ohio. ’74

MEMBERS AXD ASSOCIATES. xxiii

Burlixg-ame, Ebqexe E., Chemist and Assayer, E. E. Burlingame & Co.,

1736 Lawrence St., Denyer, Colo. ’82 Burlixgame, Walter E., Assayer and Chemist,

1736 Lawrence St., Denver, Colo. ’01 *Burnham, Mather H., Asst. Insp. Mines,

Box 1324 Johannesburg, Transvaal, So. Africa. ’9S *Burnham, William, Pres, and Treas., The Standard Steel Works,

1103 Harrison Bldg., Philadelphia, Pa. ’76 *Bijrns, William J., Mill Supt , Park Wks., Crucible Steel Co. of America,

Pittsburg, Pa. ’97

*£urrage, William H Canon City, Colo. ’00

*Burrall, Frederick P., Director Local, Compania Minera de Buena-

yista, etc., La Yesca, Territorio de Tepic, Mexico. ’97 Burrell, Alexander, Min. Mgr., Montana M. Co., Ltd., Marysville, Mont. ’92 *Burrell, HEiVRy, Mine Mgr., Yictor Coal Co.,

602 Plymouth Bldg., Chicago, 111. ’00

Burroughs, G-eorge Tyler, Jr., IVIin. Engr., Minidoka,

Lincoln Co., Idaho. ’02

*Burrows, Charles W., Supt. Met., Smelting Co. of Australia, Ltd.,

Dapto, New South Wales. ’99

Burrows, E. H Apartado 25, Guanajuato, Mex. ’99

Burt, Andrew Devon House, Sanchie by Allva, Scotland. ’99

*’Burt, Charles S Cramer <fe Burt, 1114 Monadnock Bldg., Chicago, 111. ’82

*Bush, B. F., Genl. Mgr., Coal Dept. , North Western Imp. Co., Eoslyn, Wash. ’99

*Bush, E. Eenshaw 104 John St., New York, N. Y. ’85

Bhshell, Benj. D., Min. Engr Tomboy Gold Mines, Smuggler, Colo., ’02

*Eutleb, Chahncey E., Chemist 4548 W. 33d Aye., Denver, Colo. ’96

*Butler, William Curtis, Mgr., The Puget Sound Eeduction Co., etc.,

Everett, Wash. ’96

Butters, Charles 20 Bishopsgate, Within, London, E. C., England. ’83

*Byrnes, Owen, Supt., Gold Belt Mining Co..P. O. Box 131, Marysville, Mont. ’95

**Cabot, John, Jr Care John Cabot, 553 W. 33d St., New York, N. Y. ’99

*Cabot, John W., Min. Engr., Care F. E. Cabot, 85 Water St., Boston, Mass. ’80 *CADy, Charles H., Mgr., Witherbee, Sherman & Co. Iron Mines,

Mineville, N. Y. ’88

Cairns, Frederick I., Asst. Mgr., Anaconda Copper Co.. Anaconda, Mont. ’97 Caldecott, William A., Met.,

P. O.Box 67, Johannesburg, Transvaal, So. Africa, ’02

*Caldebwood, James M Box 469, Johannesburg, So. Africa. ’96

*Caldwell, B. M Bridgeport, Ohio. ’96

*Calero, Josi), Min. Engr., Eeal del Monte M. Co.,

Las Cajas, Pachuca, Hidalgo, Mexico. ’01 *Callaghan, John T., Jr., Min. Engr. and Met., Amer. Steel Casting Co„

Chester, Pa. ’96

*Cameron, Donald, Mine Mgr Ashburton M. Co., Folsom, Cal. ’98

*Cameron, William McC., Eandfontein Estates Gold M. Co.,

Eandfontein, Transvaal, So. Africa. ’97

*Cam:m, Egbert, Min. Engr Gauley Mountain Coal Co., Ansted, W. Va. ’00

*Camp, James M., Chemist, etc Duquesne Steel Works, Duquesne, Pa. ’83

Campbell, Alexander J Sausalito, Marin Co., Cal. ’00

Campbell, E. D 108 Hill Street, Ann Arbor, Mich. ’93

Members Axb Associates.

Campbell, Fbank Genl. Algr., The Vindicator Con. G. M. Co., etc.,

302 Boston Block, Denver, Colo. ’99

Campbell, Harry H., Genl. Mgr Pennsylvania Steel Co., Steelton, Pa. ’81

*0ampbele, Marius R., Geologist Address wanting. ’92

Camphuis, George A. , Elm Cottage, Tchidy Road,

Camborne, Cornwall, England. ’01 Caxby, R. C., Supt , Montezuma Lead Co., Santa Barbara, Chihuahua, Mex. ’82

fCAKFiELD, A. Cass 40 Park Ave., Hew York, N. Y. ’76

Canfield, Frederick A., Min. Engr Dover, N. J. ’74

Caperton, W. Gastox, Genl. Mgr. and Min. Engr., Wright Coal and

Coke Co., Wright, W. Va. ’94

*Capp, John A., Chief of Testing Laboratory, General Electric Co.,

Schenectady, N. Y. ’96

*Caracristi, C. F. Z., Civ and Min. Engr.,

50 Broadway, IST. Y., and 15 Walbrook, London, England. ’01

Caedozo, Henri A ' 62 Rue de Tocqueville, Paris, France. ’98

*Caeey, Jno. R., Min. Engr Apartado 160, Chihuahua, Mexico. ’02

*Carhart, Charles M., Supt. of Mines 145 Downs St., Kingston, K Y. ’00

*Carhart, Winfield S., Min. Engr. P. O. Box 610, Telluride, Colo. ’95

*Carkeek, William, Mill Supt Colorado Sm. & Ref. Co., Butte, Mont. ’96

*Cable, Nathaniel A., Mech. and Min. Engr., Westinghouse, Church,

Kerr & Co., 26 Cortlandt St., New York, N. Y. ’00 *Carleton, James G., Min. Engr., Asst. Supt., Care J. M. Restrepo,

Honda, Colombia, So. America. ’92 *Caelsson, Hugo, Supt., Dominion Iron and Steel Co.,

Sydney, C. B., Nova Scotia. ’97

Carlyle, William A., Min. Engr., Genl. Mgr., Cia. de Rio Tinto, Ltd.,

Minas de Rio Tinto, Province de Huelva, Spain. ’96 *Cabmichael, Henry, Chemist and Metallurgist.. 12 Pearl St., Boston, Mass. ’00 Carmichael, Norman, Asst. Min. Engr. and Assayer,

Duncan United Mines, Ltd., Nelson, B. C., Canada. ’99

*Carnahan, Charles T., Mine Owner P. O. Box 566, Leadville, Colo. ’89

Carnahan, John S. , Mine Supt., Mexican Lead Co , Monterey, N. L. , Mexico. ’ 97

*Carnegie, Andrew 5 W. Fifty-first St., New York, N. Y. ’88

*Carney, James A., Div. Master Mech., Chicago, Burlington and Quincy

Ry. Co., West Burlington, Iowa. ’92

Carpenter, Alvin B., Min. Engr., Mgr., Mexico Venture Syndicate, Ltd.,

El Oro, Estado de Mexico, Mexico. ’97 Carpenter, Frank, Metallurgist, Keystone Car Wheel Co. ,

1209 Park Bldg., Pittsburg, Pa. ’98 Carpenter, Prof. F. R., Civ. and Min, Engr., Metallurgist,

918 Equitable Bldg., Denver, Colo. ’87 *Carpenter, Rolla C., Prof., Experimental Engineering,

Cornell University, Ithaca, N. Y, ’00

*Carr, Louis B., Chemist P. O. Box 707, Pueblo, Colo. ’97

*Carr, Percy E. 0., Chief Engr., The Rincon Silver Lead Mine, Ltd., etc.,

Mauri ques 9, Cordoba, Spain. ’92 *Oarbigan, Andrew, V.-Pres., Dunham, Carrigan & Hayden Co.,

17 Beale St., San Francisco, Cal. ’99 *Cabroll, Lafayette D., Mech. Engr., Care Humphreys & Glasgow,

9 Victoria St, London, S. W., England. ’88 *Caeroll, William E., Supt, Blast Furnace, Antrim Iron Co.,

Mancelona, Mich. ’01

Members And Associates.

CARitY, Hexey E. C., Ciy. and Min. Engr., P. 0. Box 574,

Vancouver, B. C., Canada. 97

*Caesox, Aethre C., Supt Indian Gold Min. Co., Pony, Mont. ’84

Carter, Benjamin P., Min. Engr.,

P. O. Box 1056, Johannesburg, Transvaal, So. Africa. ’95 *Caeter, Henry M., Metallurgist, Nuevo Iron Smelter, No. 2,

Monterey, Mexico. ’02

*Case, Charles M., Treas,, Eoyal Elevator Co.,

55 Chamber of Commerce, Minneapolis, Minn. ’96

*Case, George D Anaconda Copper Co., Anaconda, Mont. ’99

*Case, John J., Genl. Mgr Lake Superior Co., Houghton, Mich. ’94

*Catlett, Charles, Chemist, Geol. and Min. Expert,

10 New Court House St., Staunton, Ya. ’95 **Catlin, Egbert M., Genl. Mgr., Cons. Gold Fields, S. A., Ltd.,

P. O. Box 21, Germiston, Transvaal, So. Africa. ’00

*Cazin, Franz, Cons. Mech. Engr. 308 McPheeBldg., Denver, Colo., ’89

*Chalmers, George, Min. Engr., Supt., St. John del Eey M. Co., Ltd.,

Morro Velho, Villa Nova de Lima, Minas Geraes, Brazil. ’92 **Chalmers, John A., Min. Engr., Care J. S. Sheldrake, 96 Gresham House,

Old Broad Street, London, E. C., England. ’95 Chalmers, William J., Pres., Frazer & Chalmers, Boom 1428,

Marquette Bldg., Chicago, 111. ’94

*Chamberlain, H. S., Pres Boane Iron Co., Chattanooga, Tenn. ’76

Chambers, Egbert E., Mgr., Wabana Iron Mine,

Care Nova Scotia Steel and Coal Co., Wabana, Newfoundland. ’91 fCHAMPLiN, Frederick L., Pres., Gold Dredging Co., etc., Bannack, Mont. ’97 *Chance, Dr. H. Martyn, Cons. Min. Engr.,

819 Drexel Bldg., Philadelphia, Pa. ’74 Chandler, Charles F., Prof, of Chemistry Columbia University,

New York, N.Y. ’90

*Channing, j. Parke, Cons. Min. Engr 34 Park PL, New York, N. Y. ’84

Chanute, O., Cons. Engr 413 E. Huron St., Chicago, 111. ’79

Chaplin, George P., Min. Engr., The Tasco Mining Co.,

Tasco, E. de Guerrero, Mexico. ’97

*Chapman, Charles W., Min. Dir.,

39 Queen St., Melbourne, Victoria, Australia. ’91 *Chapman, Melville D., Mining Coal and Iron Ore,

80 Broadway, New York, N. Y. ’00 Chapman, Egbert H., Topographer, U. S. Geol. Survey, Washington, D. C. ’97 *Chappell, Howard F., Eesident Dir., General Chemical Co.,

135 Adams St., Chicago, 111. ’94 Charleton, a. G., Cons, Min. Engr., Dashwood House,

New Broad St, London, E. C., England. ’81

*Chase, Charles A., Supt Liberty BeU G. M. Co., Telluride, Colo. ’00

*Chase, Frank D Dedham, Mass. ’84

Chatard, Thomas M., Cons. Chemist,

1714 Ehode Island Ave., Washington, D. C. ’88 *Chauvenet, William M , Min. Engr. and Chemist, Eegis Chauvenet

& Bro., 620 Chestnut St., St. Loftis, Mo. ’90

*Chenhall, James W., Met. Engr. Totnes, Devonshire, England. ’85

*Chesebrough, George L Lyceum Bldg,, Duluth, Minn. ’97

*Chester, Albert H., Prof, of Chemistry and Mineralogy, Rutgers

College, 11 Union St , New Brunswick, N. J. ’71

Members And Associates.

*Chestee, Edward D., Mining Macliinerj, 1 20 Bishopsgate St., Within,

London, E. C., England. ’90'

*Chevbildox, Louis, Min. Engr Apartado 18, Mexico City, Mexico. ’02

Cheyney, Samuel W., Min. Engr. and GeuL Mgr., Jamison M. Co.,

Alta Sierra G. M. Co., etc., 620 Hayward Bldg , San Francisco, Cal. ’87

*Chibas, Eduaedo J Apartado 110, Santiago de Cuba, Cuba. ’96

Chibas, Luis E., Engineer and Contractor, Jefatura de Minas,

Santiago de Cuba, Cuba. ’01 *CmLD, Alfeed T., Met , Eiler’s Plant, Amer. Sm. & Eef. Co., Pueblo, Colo. ’00' **Chippexdale, Aethue, Chemist, American Club, Mexico City, Mexico. ’99 *Chisholm, Johx, Metallurgist, Care Donnybrook Gold Fields, Ltd.,

Donnybrook, Western Australia. ’ 00 *Choate, Joseph K., Je., Mine Mgr., Mother Lode hline, Fierro, New Mex. ’00-

**Choate, Wayne, Min. Eng 800 Union Trust Bldg., Detroit, Mich. ’02

*Chouteau, Pieere, Pres., Iron Mountain Co., Security Bldg., St. Louis, Mo. ’76 **Christian, Auoust, Chief Engr., Min. Dept., Anaconda Copper M. Co.,

Butte, Mont. ’99

*Chbistiansen, Herman B., Chemist Bepublic M. & M. Co., Rome, Ga. ’95

Christianson, Peter, Instructor in Metallurgy, Minn. School of Mines,

411 Walnut St., S. E., Minneapolis, Minn. ’01 *Cheisty, Samuel B., Prof., Min. and Met., University of California,

Berkeley, Cal. ’83

*Church, Albert K National Tube Co., Pittsburg, Pa. ’92

*Church, E. D., Je., Secy., Church Dwight Co.,

63 Wall St., New York, N. Y. ’88

*Chuech, Prof. John A., Min. Engr 11 William St., New York, N. Y. ’72'

fCHUECH, Myron J,, Min. Engr University Club, Milwaukee, Wis. ’97

*Chuech, Walter S., Cons. Engr 629 Main Street, Geneva, N. Y. ’81

fCHYNOWETH, B. F Houghton, Mich. ’76

Claghoen, Clarence R., Min. Engr Wahrum, Pa., ’84

Clapp, George H., Chairman, Pittsburg Testing Laboratory, Ltd.,

325 Water St., Pittsburg, Pa. ’83

*Clare:, Allan J., Chief Assayer Homestake M. Co. , Lead, So. Dak. ’97

*Clark, Clarence M., Banker, E. W. Clark & Co., Bullitt Bldg.,

Philadelphia, Pa. ’88

*Claek, Edwin M., Supt. of Smelter, 1982 Bonsallo Ave., Los Angeles, Cal. ’91

fCLAEK;, Frederich Mills Bldg., San Francisco, Cal. ’98

*Claek, George C., Min. Engr ...Bisbee, Ariz. ’01

*Clark, George M., Min. Supt., River Hill M. and M. Co., Placerville, Cal. ’99'

*Clarb:, James M., Civ. and Min. Engr Kanawha Falls, W. Va. ’02

*Clark:, Joseph K., Supt. of Mines Portland, Oregon. ’87

*Clark, Josiah H., Min. Engr 18 Wall St., New York, N. Y. ’98

*Clare:, Lindesay C., Min. Engr., Prells Bldg., Collins St.,

Melbourne, Yictoria, Australia. ’99'

**Clark, Maurice, Assayer Apartado 233, Oaxaca, Mexico. ’86

*Clark, V. V., Min. Engr Albuquerque, New Mexico. ’99

*Clark, Walton, Gas Engr., Gen. Supt. The United Gas Imp. Co.,

Broad and Arch Sts., Philadelphia, Pa. ’96 *Clark, William A., Pres. United Verde Copper Co., etc.,

49 Wall St., New York, N. Y. ’82 Clarke, Charles A., Min. Engr., Morning Star Syndicate, Ltd.,

Loope, Alpin Co., Cal. ’OO

MEMBERS AND ASSOCIATES. XXvii

*ClaekEj E, a. S.j Genl. Mgr., Deeriag Harvester Co., 16 Fullerton Ave.,

Chicago, 111. ’85

*Claeke, Hopewell... 775 Portland Ave., St. Paul, Minn. ’96

*Clark:e, Koy H., Min. Engr., Mgr., I. X. L. Gold M. Co., Eossland, B. C.,

19 Ziegler Block, Spokane, Wash. ’01

*Claee:e, Wm. B., Elect. Engr Genl. Elec. Co., Schenectady, X. Y. ’02

*Claei)ET, Abthue C., Chem. and Met. Engr.,

6 Coleman St., London, England. ’86

*Cleavelaxd, Newton Boston & Oroville Mining Co., Oroville, Cal. ’01

fCLELAND, E. Davenport, Min. Mgr., Bayley’s G. M., Ltd.,

Coolgardie, Western Australia. ’90 Clement, F. H., Engr. and Contractor 32 S. Broad St , Philadelphia, Pa. ’92

Clement, Harrison Edward, Min. Engr Bingham Canyon, Utah. ’02

**Clement, Victor M., Cons. Min. Engr., McCormick Bldg.,

Salt Lake City, Utah. ’87

*Clem:ents, J. Morgan, Geol., Asst. Prof. Univ. of Wis., Asst. Geol.

U. S. Geol. Survey, 609 Lake St., Madison, Wis. ’01 **Clemes, John H., Min. Engr., The Bracken, Newquay, Cornwall, England. ’81

*Clerc, F. L Hotel Metropole, Denver, Colo. ’87

*Cleveland, Newton Palo Alto, Cal. ’ 01

**Glife, Capt. John, Broker Ontario Hotel, Chicago, 111. ’80

*Cloxjston, T. Harold, Mine Mgr., Ringarooma Tin Mines, Ltd.,

Derby, Tasmania, ’01

*Clxjnes, Gordon, Asst, in Min. Dept., The Exploration Co., Ltd.,

11 Cornhill, London, E. C., England. ’99* Clymer, Edward T., Furnace Mgr., Allentown Don Works,

924 N. Front St., Allentown, Pa. ’82

*Olymeb, Frederick H., Min. Engr 249 N. Fifth St., Reading, Pa. ’97

*CoBBE, Hervic N. G P. 0. Box 251, Ealgoorlie, Western Australia. ’01

*Cockerell, Leslie M., Genl. Mgr., United Mexican Min. Assn., Ltd.,

Guanajuato, Mexico. ’GO'

*CoDiNGTON, Edmund W., Pres Am. Min. and Imp. Co., Bartow, Fla. ’90

*CoE, William: W., Civ. Engr Norfolk & Western Ry. Co., Radford, Va. ’83

*CoEEiN, Charles E., Charcoal Pig Iron Mfr Muirkirk, Md. ’82

*CoEEiN, William C., V. Pres., Riter Conley Mfg. Co., 55 Water St.,

Pittsburg, Pa. ’92

*CoGHLAN, Francisco M., Min. Engr Catorce, S. L. P., Mexico. ’91

**CoGS well, William B., Y. Pres. & Managing Director, Solvay Process Co.,

Syracuse, N. Y. ’72

**CoHEN, E. H. A Rand Club, Johannesburg, Transvaal, So Africa. ’94

*CoHEN, H. A., Min. Engr Room 324, 30 Broad St., New York, N. Y. ’89

*CoHEN, Louis, Met 1239 Welton St., Denver, Colo. ’01

*CoLBATH, Harry, Mill Supt Con. Mercur G. Mines Co., Mercur, Utah. ’09

*CoLBATH, L. U., Mine Mgr. and Owner. ..P. O. Box 717, Salt Lake City, Utah. ’87 *CoLBY, Albert Ladd, Met. Engr., Bethlehem Steel Co., So. Bethlehem, Pa. ’83 *CoLBY, Saeford K., Civ. Engr., Pittsburg Red. Co.,

99 John St., New York, N. Y. ’00 *CoLE, Arthur A., Assay er and Chemist, War Eagle and Center Star

Mines, Rossland, B. C., Canada. ’02

*CoLE, T. F., Pres, and GenL Mgr. of Iron Mines Duluth, Minn ’90

*C0LEMAN, Bertrand Dawson Lebanon, Pa. ’95

*CoLLEY, Bernard T Amer. Sm. & Ref. Co., Omaha, Neh. ’88*

XXYlll

Membees And Associates.

CoLLiEE, JoHX H., ]Min. Engr Haydenliill, Lassen Co., Cal. ’00

**CoLLiN, Emile C., Mgr., Cie. des Mines et XJsines d’Escombrera, Bley berg

(Spain and Belgium), 49 Eue de Miromesnii, Paris, France. ’86 *CoLLiNGS, Burton L, Care Harvey & Co., P. O. Box 953,

Jobannesburg, Transvaal, So. Africa. ’02 COLLINGWOOL, Francis, Cons. Engr., and Expert Civil Service Examiner,

346 Broadway, New York, N. Y. ’82

*CoLLiNS, George E., Min. Eng 217 Boston Bldg, Denver, Colo. ’00

Collins, Henry F., Min. and Met. Engr., J. H. Collins & Son,

702 Salisbury House, Finsbury Circus, London, E. C. , England. ’ 96

'Collins, Horace F Hermanos, Coah., Mexico. ’00

*CoLLiNS, W. J P- 0. Box 308, Melbourne, Victoria, Australia. ’93

*Collord, George L., Supt Sbenango Furnace Co., Sbarpsville, Pa. ’01

CoLQUHOUN, James, Genl. Mgr Arizona Copper Co., Clifton, Ariz. ’98

'Colton, Charles A., Director, Newark Technical School,

367 High Street, Newark, N. J. ’74

**CoLviN, Yerplangk N. Y. State Land Survey, Albany, N. Y. ’81

CoLVfELL, James M., Secy, and Treas., N. Y. Camera Mfg. Co,,

164 W. 27tb St., New York, N. Y. ’93 *Golyar, Louis S., Pres., Eagle Iron Co., Kome Furnace Co.,

Chattanooga, Tenn. ’85

*CoMSTOCK, Charles W, Prof. Min. Eng., Colorado School of Mines.

Golden, Colo. ’00

Comstock, Prof. Theodore B., Cons. Engr. , 534 Stimson Block,

Los Angeles, Cal. ’80

*CoNANT, H. D., Asst. Supt... Lake Superior Smelting Co., Dollar Bay, Mich. ’88

*CoNLEY, OVEN J., Min. Eng 96 Broadway, New Y’ork, N. Y. ’02

*Connell, William, Coal Operator Connell Bldg., Scranton, Pa, ’87

*CoNNER, Eli T Cresson, Pa. ’92

'Conner, John T., Mine Supt “ The Monticello,” Helena, Mont. ’00

*CoNNOR, Charles 4840 Lytle St., Hazlewood, Pa. ’86

’’CoNNOR, S. B 2009 Central Ave., Alameda, Cal, ’88

*CoNRADSON, PoNTUS H., Chief Chemist, Galena Signal Oil Works,

Franklin, Pa. ’92

*CooK, Edgar S., Pres Warwick Iron and Steel Co., Pottstown, Pa. ’77

*Cook:, Edward H., Cons. Engr., Supt., Am. Sm. & Kef. Co.,

Asientos, Aguascalientes, Mexico. ’96 CooK, Robert A., Genl. Mgr., Standard Silica Cement Co.,

66 Maiden Lane, New York, N. Y. ’83 *CooKE, Henry M. A., Min. Engr., Oergum G. M. Co., Ltd.,

Oorgaum, Mysore, India. ’01

CooKE, Lewis H Royal School of Mines, London, S. W, England. ’01

CooLiDGE, Walter G., Copper Ref., Chicago Copper Ref. Co.,

310 Western Union Bldg., Chicago, 111. ’82

*CooM, Henry Stratton’s Independence Mine, Victor, Colo. ’02

fCooMBS, Harold L Old Dominion Cop. S. and R. Co., Globe, Ariz. ’02

*CooPER, Augustus S., Min. Engr.. ...219 Crocker Bldg., San Francisco, Cal. ’00 Cooper, Edward, Iron Merchant, Cooper, Hewitt & Co.,

17 Burling Slip, New York, N. Y. ’74 tfCooPER, .James B., Supt., Calumet and HeciaSm. Wks.,

South Lake Linden, Mich. ’99 *Copeland, F. K., Pres Sullivan Mach. Co , 135 Adams St., Chicago, 111, ’87

Membees And Associates.

*CoRBOULT), William Hexry, Hannan’s Reward, Ltd.,

Kalgooriie, Western Australia. ’92

CoBBus, A. W 1511 Jones St, San Francisco, Cal. ’00

’'CoEBUS, J. Parker, Mine Mgr 1511 Jones St, San Francisco, Cal. ’96

H'obeyWV. E., Pres Carnegie Steel Co., Pittsburg, Pa. ’94

*CoEXELius, "William A., Asst. Mgr Natl. Tube Co., McKeesport, Pa. ’01

Cornell, Russell T., Min. Engr., Care Copper Queen Cons. Min. Co.,

Douglas, Ariz. ’ 02

Corning, C. R., Min. Engr 36 M"all St, New AMrk, N. Y. ’86

*CoRXiNG, Frederice: G., Min. Engr 15 Broad St , New York, N. Y. ’77

tCoRRY, Arthur V., Min. Engr P. 0. Box 547, Butte, Mont ’97

Coryell, Torbert, Min. Engr., Supt , Union Imp. Co. of Hazleton, Pa.,

Lambertville, N. J. ’83

CosENS, John Dickson, Min. Engr., The Richmond G. M. Co.,

Pundalur Hilgiri, IVynaad, So. India. ’95 *Cosgro, Jno. P., Mech. Engr., Var Eagle Con. Min. and D. Co.,

Rossland, B. C., Canada. ’01

*CoSTE, Eugene, Min. Engr 171 Lowtber Ave., Toronto, Ont, Can. ’87

**CouMERiLH, William, Mine Operator. Wallace, Idaho. ’95

Countryman, T. R-, Min. Engr., U. S. Dep. Mine Surveyor,

Cripple Creek, Colo. ’8

*CouRTis, W. M., Cons. Min. Engr., Treas., U. S. Potash Co., Ltd., etc.,

412 Hammond Bldg., Detroit, Mich. ’71 *CouRTNEY, Charles F., Genl. Mgr., Sulphide Corporation, Ltd.,

Central Mine, Broken Hill, New South Wales. ’97

*CowAN, James L, Min. Engr 1918 Logan Ave., Denver, Colo. ’99

*CowLES, Alered H., Pres., Elect. Sm. & Aluminum Co., Cowles Elect Sm. & Aluminum Co., Pecos River M. Co.,

361 The Arcade, Cleveland, Ohio. ’86 *Cox, Jennings S., Jr., Genl. Mgr., Spanish-American Iron Co.,

Santiago de Cuba, Cuba, *99

tCox, Sterling B 67 Harrison St, East Orange, N, J. ’01

*Cox, Thomas, Mgr., Larsen & Greenough, Morning” and You Like”

Mines, Mullan, Idaho. ’01

’Cox, William J., Min. Supt., Mollie Gibson Cons. M. and M. Co.,

Aspen, Colo. ’93

fCoxE, Alexander B., Coal Operator Coxe Bros. & Co., Inc., Drifton, Pa. ’80 *CoxE, Charles E., Ore Buyer, Cia. Comercial Beneficiadora de Minerales,

Zacualpan, E. de Mexico, Mexico. ’00

*Coxe, Eckley B., Jr Anthracite Coal Operator, Drifton, Pa. ’93

*CoxE, W. E. G., Sales Agent, Cambria Steel Co. and P. R.R- Co.’s

Anthracite Coal, 316 Nasby Bldg., Toledo, Ohio. ’74 CoYNE, Frank H., Min. Engr... Room 131, 80 Broadway, New York, N. Y. ’00

*Crafts, Walter K, Manufacturer of Machinery Oberlin, Ohio. ’95

*Cbagoe, Spencer, Min. Engr., Mgr., Parral Mines Co., Ltd.,

Hidalgo del Parral, Chihuahua, Mexico. ’97

Crandall, W. R., Supt Boston-Duenweg M. Co., Duenweg, Mo. ’86

fCRANE, Theron 1 615 Girard Bldg., Philadelphia, Pa. ’92

*Crane, Walter R., Asst. Prof., Min., University of Kansas,

645 Ohio St., Lawrence, Kan. ’00 *Cranston, Robert E., Mgr., Ashburton Mining Co.,

50 State St, Boston, Mass., and Folsom, Cal. ’73

Members Axd Associates.

*CitATOORi>, Geokge G. , Mgr. , ]XatL Dept. , Natl. Tube Co. , McKeesport, Pa . ’00

Crawford, Hexry E., Min. Engr 220 'VV. 28tli St., New York, N. Y. ’02

*Cra.wford, John J., Met. and Alin. Engr.,

1209 Call Bldg., San Francisco, Cal. ’73

Crawford, John L., Chemist 26 S. Jefferson St., Newcastle, Pa. ’84

*Crem;er, Felix, Engr., Care La Gran Fundicion Central Alexicana,

Aguascalientes, Mexico. ’00

Cremer, J. H 24 Superior St., Cleveland, Ohio. ’75

Crichton, Donald G , Aletallurgist Nundle, New South Wales. ’89

Crockard, Frank H., Mgr,, Eiverside Dept., Natl. Tube Co.,

Wheeling, W. Va. ’95

Cocker, a. L., Mech. Engr 2515 Blaisdel Avenue, Minneapolis, Minn. ’80

’Crocker, George A., Iron Merchant 99 John St., New York, N. Y. ’79

*Croft, Henby, Cons. Engr Victoria, B. C., Canada. ’00

*Crooke, Robert L 100 E. 17th St., New York, N. Y. ’89

Crooker, Ralph, Jr., Mech. Engr Acton, Mass. ’81

*Crookston, a. W., Min, Engr. and Aline Owner,

188 St. Vincent Street, Glasgow, Scotland. ’80

*Cross, Arthur D 331 Montgomery St., San Francisco, Cal. ’91

*Crow, Thomas B., Assayer and Chemist Idaho Springs, Colo. ’00

Crowell, Benedict, Min. Engr., Crowell <fe Peck,

731 Williamson Bldg., Cleveland, Ohio. ’93 Croxton, David T., Genl. Algr... Cleveland Furnace Co., Cleveland, Ohio. ’93 Croxton, Sajiuel W., Pres, and Genl. Mgr., The Penn Iron & Coal Co.,

310 Perry-Payne Bldg., Cleveland, Ohio. ’75

*CuEVAS, Luis G., Assayer Apartado 148, San Luis Potosi, Mexico. ’97

'Culling WORTH, Sydney, Alin. Engr., Kulicoola G. Copper Aline,

Palmer, So. Australia. ’97

'CuLLUM, James B., Genl. Sales Agent, Harbison- Walker Co.,

Park Bldg., Pittsburg, Pa. ’91

Cummings, George P., Civ. and Min. Engr Marquette, Mick. ’81

Cummings, William N., Min. Engr. & Met., Genl, Supt. for The Dwight-

Furness Co., Etzatlan, Jalisco, Mexico. ’93 CuMMfNS, Leon, Cyanide Chemist and Elec. Engr. ,

1355 Ellis St., San Francisco, Cal. ’00

Cunningham, Eckley S., Mine Supt Drifton, Pa. ’99

Cunningham, James S., Supt., Berwind-White Coal Alin. Co., Windher, Pa. ’83 'Currie, David, Min. and Met. Engr., Lake & Currie, Norfolk House,

7 Laurence Poultney Hill, London, E. C., England. ’00

**CtJERiB, Walter, Min. Engr Bulawayo, Rhodesia, So. Africa. ’96

fCuRTis, Nathaniel, Mining 1737 California St, Denver, Colo. ’98

Cutting, Charles H, Supt of Mines Troy Cop. Co., Troy, Ariz. ’01

Daggett, Ellsworth, Min. Engr Salt Lake City, Utah. ’73

*Daly, Herbert J., Min. Engr., Cons. Mines Selection Co., Ltd., Broken

Hill Chambers, 31 Queen Street, Melbourne, Victoria, Australia. ’98 Dan, Tahuma, Care Mitsui M. Co., No. 4, Suruga Cho Nihonhashi-Ku,

Tokio, Japan. ’88

*Dane, Edward G 14 Burnfoot Ave., Fulham, S. W., London, England. ’02

Daneorth, a. H Florence, Colo. ’82

*Daniel, William B., Min. Engr P. O. Box 844, Webb City, Mo. ’00

Daniels, Frederick H., Chief Engr., Am. Steel & Wire Co.,

214 Salisbury St., AVorcester, Mass. ’76

MEMBEKS AKD ASSOCIATEvS.

*Daeby, Thomas L., Alin. Engr., 529 Alining Exchange BIdg.,Den¥er, Colo. ’98

Darlixgton, Hexey 17 Stevenson Bldg., Pittsburg, Pa. ’90

ARLINGTON, AVayne, Min. Engr. and Alet Antelope, Idaho. ’95

Darsie, James 401 AVood St., Pittsburg, Pa. ’93

Dart, Albert C., Jr., Chemist and Assayer, P. 0. Box 57,

Idaho Springs, Colo. ’02

Barton, N. H., Geologist U. S. Geol. Survey, AXashington, D. C. ’94

*Davenport, Eessell AAC,

‘‘The Lincoln,” 1222 Locust St., Philadelphia, Pa. ’77 Dayey, George, Aletallurgist, 219 Ladbroke Grove, Netting Hill,

London, AV., England. ’91

*Dayey, Thomas N., Aline Owner Lavey & Son, Carthage, Mo. ’97

*I)avid, AV. AI., Nassau Copper AA’’ks.,

Bichmond Aalley, Tottenville, S. I., N. Y. ’88 *Dayidoy, Isieor, Alin. Engr., Santa Barbara Gold Placer Co ,

30 Broad St., New York, N. Y. ’00

Davidson, George At., Chemist, Chicago & N. W. By. Co Chicago, IJL ’81

tDAYTDSON, Louis, Alin., Alech. and Electrical Engr.,

8 Burden Terrace, Newcastle-on-Tyne, England. ’ 99 *Davidson, Otto C., Genl. Supt., Iron Mines, Oliver Iron AI. Co.,

Iron Mountain, Mich. ’91

*I)ayidson, AVilliam S.,, Alin. Engr., Care Clarkson & Co.,

Port Arthur, China. ’96

*Dayies, Edward H., Alin. Engr., 6 Great AVinchester St.,

London, E. 0., England. ’00

*Davies, Hywel, V. Pres Central Coal & Iron Co., Kensee, Ky, ’99

*Davies, AVilliam H., State Mine Inspector, P. 0. Box 743, Hazleton, Pa. ’97

*Dayis, Britton Aline Owner and Algr. Box 127, El Paso, Texas. ’90

*Dayis, Carl B., Alin. Engr., Supt , Centre Star AI. Co., Ltd., and

Eagle Cons. M. & I). Co., Bossland, B. C., Canada. ’99

*Bayis, Charles H., Cons. Engr 25 Broad St., New York, N. Y. ’00

*Bavis, Charles S Beynoldsville, Pa. ’01

*Bavis, Charles AV., Asst. Sales Mgr., Standard Underground Cable Co.,

912 Western Ave., Allegheny, Pa, ’02 Bayis, F. Harley, V. Pres, and Genl Mgr., Bavis Calyx Brill Co.,

128 Broadway, New York, N. Y. ’99 *Bayis, Prof. Floyd, Analytical and Consulting Chem. and Min. Engr.,

Iowa Loan & Trust Bldg., Bes Aloines, Iowa. ’88 *Bayis, Frank S., Alin. Engr., Biamond C. & C. Co.,

Biamondville, Uinta Co., Wyoming, ’01 *Bays, George C., Anal, and Cons. Chemist, 39 S. 10th St. , Philadelphia, Pa. ’93 *Bayis, Herman, Owner and Mgr., Nevada Beduction Works,

Bayton, Lyon Co., Nev. ’01

*Bayis, James C., Genl. Supt., Care Leighton & Howard Steel Co,,

East St. Louis, 111. ’98

*Bayis, Lewis K., Mech. Engr Indianapolis, Ind. ’93

*Bayis, Louis M 320 Sansome St., San Francisco, Cal. ’84

*Bayis, Morgan, Jr., Min. Engr.,

Booms 42 and 43 Coal Exchange, Scranton, Pa. ’93

*Bayis, Stewart A., Biv. Supt Am. Sheet Steel Co., Aandergrift, Pa. ’01

*Bayis, William C., Algr., F. M. Bavis Iron Works Co.,

8th and Larimer Sts., Benver, Colo. ’89

Membees Axd Associates.

Davisox, George L., Supt Illinois Steel Co., South Chicago, III. ’97

*Daw, John W., Min., Civ. and Met. Engr., Gen. Mgr., Ashanti Goldfields

Corp., Ltd., 6 Southampton St., London, England. ’93

Bawes, H. F Englewood, X. J. ’87

*I)awsox, T. Lauxcelot, Min. Engr., Yangtse Valley Co., Ltd.,

49 Szechuen Road, Shanghai, China. ’96 Day, David T., Geologist, Chief, of Div. of Mines and Metals,

U. S. Geol. Survey, Washington, D. C. ’87

*Day, Williai H., Je., Mfg, and Min Dubuque, Iowa. ’00

a. L , Min. Engr. and Met., P. O. Box 110, Victoria, B. C., Canada. ’96

*Dean, George A., Furnace Supt Penn. 1. & C. Co., Canal Dover, Ohio. ’86

*De Camp, William S., Mine and Forest Engineering, 35 Mt. Morris Park

W., New York. (May—Oct., Fulton Chain, N. Y.) ’76

*De Deken, Albert, Met. , Min. Engr. and Chemist, 64 Rue de la Station,

Louvain, Belgium. ’84

*DbKalb, Coubtexay, Min. Engr., Manager,

Fernando M. Co., San Fernando, Durango, Alexico. ’92

*Deidesheimer, Philip, Min. Engr 2808 Clay St., San Francisco, Cal. ’00

*Delano, Frederic A., Genl. Mgr., C. B. & Q. Ry.,

209 Adams St., Chicago, 111. ’86

**Delaxo, Warren, Jr., Coal Operator 1 Broadway, New York, N. Y. ’92

fDE Lashmutt, Ivan, Assay er... Santa Rita M. Co., Santa Rita, New Mex. ’00

Del Mar, Algernon, Cons. Alin. Engr 351 Mary St., Pasadena, Cal. ’93

*Delprat, G. D., Alin. Engr. and Genl. Mgr., Broken Hill Proprietary Co.,

Ltd., Broken Hill, New South AVales. ’90 *Delrez, Theodore, Civ. and Alin. Engr.,

45 Boulevard Berthier, Paris, France. ’92 *Demond, Charles D., Testing Engr., Anaconda Copper Aline Co.,

Anaconda, Mont. ’94

Dempster, Wm., Alin, and Alet. Engr.,

119 Albert Road, Pollokshields, Glasgow, Scotland. ’01 *Denby, Wythe, Min. Engr., Supt., Alaska-Snettisham Gold Mg. Co.,

Snettisham, Alaska. ’95

*Dengleb, Theodore, Min. Engr.,

Atlantic Mine P. 0., Houghton Co., Mich, ’95 IDenison, Walter H , Aline Owner and Supt., Keystone Manganese & Iron

Co., Cushman, Ark. ’98

*Denman, Heber, Supt The McAlester Coal Co., Alderson, Ind. Ty. ’01

Dennis, Francis J., Min. Engr Tientsin, No. China. ’99

Denny, George A., Cons. Engr., Genl. Min. & Finance Corp., Ltd., Gruson-

werk Bldg , Marshall Square, Johannesburg, Transvaal, So. Africa. ’93

Denton, Fred. W Atlantic Mine P. O., Houghton Co., Alich. ’92

Dbeby, Charles C., Mgr. , Mariposa Com. & M. Co.,

Mt. Bullion, Mariposa Co., Cal. ’99 *Derbt, Orville A., Commissao GeoL e Geol. de Sao Paulo,

Sao Paulo, Brazil. ’02

*De Saxjlles, Arthur B., Supt., Bethlehem Works,

N. J. Zinc Co. (of Pa.), South Bethlehem, Pa. ’71

*Detert, William F., Min. Supt Jackson, Amador Co., Cal, ’99

*Devereux. James H., Min. Engr Aspen, Colo. ’‘89

*Devbeeux, W. B., Min. Engr., Care Ledoux Co.,

99 John Street, New York, N. Y. ’80

Members And Associates*

Dewey, C. E., Mining and Milling 821 Cooper Bldg., Denver, Colo. ’93

Dewey, Edwaep H., Min. Supt Nampa, IdaRo. ’97

Dewey, Frederic P., Patent Causes in Chemistry and Metallurgy,

908 Gr St., N.W., Washington, D. C. ’77

Dewey, William P Care N. Y. Club, 370 Fifth Ave., New York, N. Y. ’85

fDiCKENSON, Francis M., Secy., Broken Hill Prop. Co., Ltd.,

Equitable Bldg., Melbourne, Victoria, Australia. ’95

Dickerman, Alton L., Cons. Min. Engr Colorado Springs, Colo. ’88

Dickerson, Clarence M., Aurora Con. M. Co., Alamo,

Lower California, Mexico. ’02

Dickerson, Winchester, Min. Engr Helena, Mont. ’87

Dickinson, Harold T., Min. Engr., De Beers Cons. Mines, Ltd,,

Kimberley, So. Africa. ’02

*Dicb:man, Herman I’Etat In dependant du Congo, Boina, Africa. ’99

Dicbiman, Egbert N., Min. Engr. and Met.,

1104 The Eookery, Chicago, 111. ’89

*Dickson, Charles Wm., Geologist Columbia XJniv., New York, N. Y. ’02

Diefpenbach, H. M., Manager, Amer. Sm, Eef. Co..Monterey, Mexico. ’02 *Diehl, Ambrose N., Supt., Blast Furnace, Carnegie Steel Co.,

Duquesne, Pa. ’02

*Diggles, James A., Min. Engr Utica G. M. Co., Angels Camp, Cal. ’97

Higgles, Bobert N Melones, Cal. ’00*

*Dikeman, J, M., Min. Engr., Care L. W. Worth Delta, Colo. ’97

*Dingwall, W. B. a., Min. Engr. and Genl. Mgr., La Paz M. Co.,

P. 0. Box 113, Matehuala, S. L. P., Mexico. ’97 **Dinkey, Charles E., Asst. Genl. Supt., Edgar Thomson Steel Works,

Braddock, Pa. ’87

**D’Inyilliebs, Edward Y., Min. Engr. and Geologist,

Rooms 9-10, 506 Walnut St., Philadelphia, Pa. ’82

*Divine, Richard D., Chemist Am. Sm. & Eef. Co., South Chicago, HI. ’95

**Dixon, James T., Min. Engr., Girton McLaren St ,

North Sydney, Australia, ’99 *Dixon, Samuel, Mine Mgr Macdonald Colliery Co., Macdonald, W. Va. ’97 Doane, W. H., Pres., J. H. Fay & Co. ..115 E. Fourth St., Cincinnati, Ohio. ’90 *Doble, William A., Pres., Abner Doble Co., 200 Fremont St.,

San Francisco, Cal. ’ 94

*Docb:ery, Love A., Min. Engr Robinson House, Chihuahua, Mexico. ’00

**Dodge, Cleveland H., Merchant and Mine Owner,

99 John St, New York, N. Y. ’02 *Dodge, James M., Pres., Link-Belt Engineering Co., Nicetown,

Philadelphia, Pa. ’94

**Dodge, William E., Mine Owner and Merchant, 99 John St.,

New York, N. Y. ’OO

*Dods, John C., Engr., Laclede Fire Brick Mfg. Co., etc.,

915 Wainwright Bldg., St Louis, Mo. ’94 *Doepel, Alexander, Met. and Cyanide Expert,

Burke St., Maryborough, Victoria, Australia. ’00 'Doerr, Albert, Min. Engr., Mgr., Aguascalientes Metal Co.,

Asientos, Aguascalientes, Mexico. ’97 *Doerr, Edward, Genl. Supt., Guggenheim Exploration Co.,

Santa Barbara, Chihuahua, Mex. ’97

Members And Associates.

Doif, JoHisr E., Chemist and Geologist, Waitaki High School,

Oamaru, New Zealand. ’96

*Doxaid, William, Assayer and Chemist, Care Dr. Lucius Pitkin,

47 Fulton St., New York, N. Y. ’00

Dojiallsox, William J Betz Building, Broad St., Philadelphia, Pa. ’81

Doxey, DeWitt C., Chemist and Metallurgist, DeLamar Cop. Kef. Wks.,

Carteret, N. J. ’99

*Donohoe, Chas. M., Civ. and Min. Engr 28 Johnson St., Lynn, Mass. ’01

*Doxo HUE, Patrick J 571 So. Main Street, Salt Lake City, Utah. ’97

*Doolittle, Charles H The University Club, Denver, Colo. ’96

tDoRPLiNGER, Charles H., Glass Mfr White Mills, Pa. ’93

**Doriox, Fernand J., Min. Engr., Genl. Mgr., Cateraow Copper Co.,

Casilla 1000, Valparaiso, Chili, So. America. ’96

*Dorman, Edgar S., Min. Engr P. O. Box 284, Missoula, Mont. ’02

*Dorb, John Van N., Mgr. Cyanide Mill Dead wood, So. Dak. ’01

**Dougheety, Clarence E., Min. Engr 41 Wall St., New York, N. Y. ’87

*Dougherty, J. W., Asst. Supt., Blast Furnaces Steelton, Pa. ’91

fDouGHERTY, Thomas H., Teacher School Lane, Germantown, Pa. ’92

**Douglas, James, Metallurgist 99 John St., New York, N. Y. ’89

Douglas, Theodore, Metallurgist, Anita C. M., Cocorit, Sonora, Mexico. ’01

*Douglas, Walter, Supt., Copper Queen Cons. Min. Co Bisbee, Ariz. ’92

*Doyeton, Godfrey D. , Metallurgist Camp Bird Mills, Ouray, Colo. ’02

*Downer, Koger H Camp Bird Mills, Ouray, Colo. ’02

*Dotvney, Maurice Troy, Mont. ’01

*Downey, W. H., Mine Mgr., Hannans Consuls,

Kalgoorlie, Western Australia. ’98 Doivns, Carleton K., Supt., Bunker Hill Cons. M. Co. ..Amador City, Cal. ’00

*Downs, M. E Downs Bldg., Seattle, Wash. ’87

fDowNS, Walter E., Civ. Engr Sutter Creek, Amador Co., Cal. ’99

Downs, W. F., Min. Engr 76 Fairview Ave., Jersey City, N. J. ’83

*Doyle, Pat., Cons. Engr., Editor and Prop. ‘Mndian Engineering, ”

7 Government Place, Calcutta, India. '79

*Dozieb, Charles T 1934 Virginia St., Berkeley, Cal. ’02

*Drake, Benjamin L, Eynon-Evans Mfg. Co., 107 Liberty St.,

NewYork, N. Y. ’97

*Drake, Charles F. , Mech. Engr. 59tli and Wallace Sts., Chicago, 111. ’00

*Drake, Francis M., Min. Engr., Cie. Franpaise des Mines d’Or et d’

Explor., P. 0. Box 3258, Johannesburg, Transvaal, So. Africa... ’87 *Dbake, Frank, Chief Engr., Iron Mines, U. S. S. Corp.,

416 Lyceum Bldg., Duluth, Minn. ’91 Drake, Noah F., Prof., Mining Eng., Imperial Tientsin University,

Tientsin, China. ’98

Draper, Egbert M., Care Boston <fe Montana Smelter... Great Falls, Mont. ’00 *Drinker, Henry S., Genl. Solicitor, Lehigli Valley By. Co.,

26 Cortlandt St., New York, N. Y. ’71 *Dron, Andrew P., Genl. Mgr. Mines, Longfellow G. Synd., Ltd,,

Big Oak Flat, Tuolumne Co., Cal. ’99

Drown, Dr. Thomas M,, Pres Lehigh University, South Bethlehem, Pa.

*Drummond, George E., Iron Mfr., Koom 70, Canada Life Bldg.,

Montreal, Canada, ’94

JDrummond, John J Midland, Ont, Canada. ’93

*Dbummond, Thomas J., Iron Mfr., Dir, Canada Iron Furnace Co., Ltd.,

Montreal, Canada. ’94

Members Axd Associates.

*Drxjmmoxd, Thomas Eussell, Assayerand Cliemist, Highland Boy Mine,

Bingham Canon, Utah. ’89

Prof. Aug. J ay New Haven, Conn. ’76

*I)uBois, Howard W., Min. Engr., Mixer DuBois, 4526 Eegent St.,

Philadelphia, Pa. ’94

*DuBois, Louis C Care Dorcas M. . & D. Co., Florence, Colo. ’00

*DuBois, Wilbur F., Mine Supt., Arlington Mines, Ltd.,

Slocan City, B. C., Canada. ’00 ’'Dugdeox, Normax, Genl. Mgr., New Inkerman Mines, Ltd.,

Eeefton, New Zealand. ’02 *Dudley, Dr. Charles B., Chemist, Penn. Ey. Co. ,

P. O. Drawer 334, Altoona, Pa. ’78

Dudley, P. H 80 Pine St., New York, N. Y. ’75

Dudley, Uriah, White Eock Silver Mine, Ltd., Drake, New South Wales. ’92 *’Dudley, William L., Prof., Chem., Vanderbilt University, Nashville, Ten n. ’84 *Dufourcq, Edward L., Min. Engr., Genl. Supt., Montezuma Lead Co.,

Santa Barbara, Chihuahua, Mexico ’93

*Duggax, George H., Civ. Engr Sydney, Cape Breton, Nova Scotia. ’02

*Dumble, Edwix T. , Geologist, Southern Pacific Ey. Co. ,

1306 Main St., Houston, Texas. ’90

**Dumoxt, John M 1434 Humboldt St., Denver, Colo. ’82

Duncax, Gustavus a., Min. Engr., 418 Dooly Blk., Salt Lake City, Utah. ’02

*Dukcax, Johx, Asst. Supt Calumet & Hecla M. Co., Calumet, Mich. ’80

*Duncan, M. M.. Mine Mgr Cleveland Clifis Iron Co., Ishpeming, Mich. ’84

*Duxham, Lewis A., Min. Engr., Amer. Zinc Extraction Co.,

404 New England Bldg,, Kansas City, Mo. ’99 *Duxham, Lewis E., Mgr., Blast Fur., Ashland Iron & Steel Co., Ashland, Wis. ’90

fDuxLAP, Thomas Doylestown, Pa. ’81

*Duxshee, B. H., Supt Boston & Mont. C. C. & S. M. Co., Butte, Mont. ’90

*Duxstax, Alfred J., Min. Engr-, ‘‘Ovalon,” King St.,

Ashfield, New South Wales. ’90

*Dunyox, Newtox a., Min. Engr 23 H St, Salt Lake City, Utah. ’98

DuPont, T. C., Pres., Central Coal Iron Co., McHenry Coal Co., etc.,

Wilmington, Del. ’97

*Dueant, BQexry T Dayton, Nev. ’02

*Durbrow, Wm., Min. Engr Selby, Cal. ’02

Durham, Edward B., Min. Engr.. .Care Trenton Iron Co., Trenton, N. J. ’00

*Dwelle, Jesse E., Min. Engr 2224 Gaylord St, Denver, Colo. ’98

*Dwight, Arthur S., Min. Engr. and Met , Cia. Metalurgica Mexicana,

27 William St., New York, N. Y., and San Luis Potosi, Mexico. ’85 *Dwight, Theodore, Electr. Engr., Asst Sec., Am. Inst, Min. Engrs.,

99 John Street, New York, N. Y. ’92 *Dysox, James, Civ. and Min. Engr., U. S. Deputy Mineral Surveyor,

Silverton, Colo. ’00

*DYaoK, Thomas Ingleby, Met, The Lloyd Copper Co., Ltd.,

Burraga, New South Wales, Australia. ’97

*Eagax, Daniel, Mech. Engr 4520 Chester Ave., Philadelphia, Pa. ’87

*Eames, Bichabd, Jr., Min, Engr,. Salisbury, N. C, ’88

*Eable, Frank C., Mgr., Cons. Kansas City Sm. & Ref. Co.,

El Paso Smelting Works, El Paso, Texas. ’84 *Earnshaw, Arthur R., Steel Mfr Steelton, Pa. ’02

Members And Associates.

*Earp, Db. Francis S., Met. Chemist, Boulder Perseverance G. M. Co.,

Boulder City, Western Australia.

Eastebbrook, Frank B Raritan Copper Wks., Perth Amboy, N. J.

*Easton, Stanley A., Min. Engr Kellogg, Idaho.

Eaton, Lucien Cleveland CliSs Iron Co., Ishpeming, Mich.

*Eavbnson, Howabl N Tug River, W. Va.

Eberhabut, William G., Min. Engr Ridgefield Park, K. J.

*Eckpeldt, Howard 829 Seneca St., So. Bethlehem, Pa.

*Edb, J. a., Min. Engr El Paso, Texas.

*Edison, Thomas A., Electr. Engr. and Inventor Orange, K J*.

*Edols, j. H., Mine Mgr Kalgoorlie, Western Australia.

Edwards, Adelbert D., Mine Cashier, Atlantic M. Co., etc. ,

Atlantic Mine P. 0., Mich.

Edwards, Arthur J., Met., The Rossman Co. , 801 Guaranty Bldg.,

Minneapolis, Minn.

*Ed WARDS, Henry W., Met Room 23, No. 79 Milk St., Boston, Mass.

*Ed wards, j. Warner P. 0. Box 148, Goldfield, Colo.

*Ed WARDS, Richard M., Min. Engr., Isle Royale Copper Co.,

Houghton, Mich.

Edwards, William S., Pres, and Genl. Mgr., The Franklin Zinc Co.,

Room 804, 116 Kassau St, Kew York, N. Y. *Ehrich, Walter L, Min. Engr., The Wright-Gilnmn Co.,

320 Sansome St., San Francisco, Cal. *Eilers, Anton, Metallurgist and Min. Engr., Amer. Sm. & Ref. Co.,

71 Broadway, Kew York, IST. Y.

*Eilers, Karl, Mgr., Lead Sm. Wks., Eilers Plant, Am. Sm. & Ref. Co.,

Boston Bldg., Denver, Colo.

*Eissler, Emanuel, Min. Engr., Care Morgan, Hares & Co.,

31 Boulevard Haussmann, Paris, Prance. Ekbero, Benj. P. , Finsbury House, Bloomfield St., London, E. C., England.

*Ekman, Adolf, Assayer Oroville, Butte Co., Cal.

Elbert, Samuel B., Chem. & Assayer Rollinsville, Colo.

Eldridge, George H.,U. S. Geological Survey Washington, D. 0.

*Elguera, Manuel, Min. Engr Huallaga 188, Lima, Peru, So. America.

Ellard, Hugh F., Supt Ashland Mines, Ironwood, Mich.

*Ellerbeck, T. R., Genl. Supt Utah & Pac. By., Salt Lake City, Utah.

*Elliot, John L., Mining 71 Broadway, New York, N. Y.

Elliott, Arthur H., Engr. and Chemist, Cons. Gas Co.,

4 Irving Place, New York, N. Y. *Ellis, Henry R,, Min. Engr.. .217 S. W. Temple St., Salt Lake City, Utah.

*Ellis, John, Mech. Engr Angels Camp, Cal.

*Ellis, Ralph Walter, Sports Club, St. James Square, London, W.,

England.

*Elmer, James M P. 0. Box 577, Dawson, Yukon Ty., Canada.

*Elmer, William W., Min. Engr. Mgr., M. Gufiy Co.,

Roosevelt, Thunder Mountain, Idaho. *Ely, Theodore N., Chief of Motive Power, P. R.R., Broad Street Station,

Philadelphia, Pa.

*Emanuel, Louis V 55 Rector St., Perth Amboy, N. J.

Emerson, James H., Mine Mgr Denver, Colo.

Emery, August B., Min. Engr., War Eagle and Center Star M. & D. Co.,

Rossland, B. C. , Canada.

’98

'02

'98

'01

'00

'00

'02

'93

'89

'98

'95

'01

'93

'76

'86

'93

'02

'71

'88

'93

'01

’02

'02

'89

'92

'02

'95

'98

'95

'98

'98

'02

'99

'98

'00

'99

'02

Membebs And Associates.

Emlaw, Harlx S-, Engr.j New Keduction Works,

Port Arthur, Ont., Canada. ’98

*Em;mens, Stephen H., Cons. Engr., Care Newton W. Emmens,

726 Park Bldg., Pittsburg, Pa. ’93

Emmerich, L. 0., Min. Engr Hazleton, Pa. ’94

*E]MAIerton, F. a., Chemist 9 Bratenabl Bldg., Cleveland, Ohio. ’84

tEmmons, Arthur B Newport, E. 1. ’85

*Emmons, Nathaniel H., 2d, Min. Engr., Mgr. and Treas.,

The Taviche Mining and Milling Co., Ocotlan, Oaxaca, Mexico. ’93 **Emmons, Saaiuel F., Min. Engr. and Geologist, XT. S. Survey,

1330 F St., Washington, B. G. ’77 *Engel, Konrab, Bergmeister, Care Berghau Verein,

Essen (Euhr), Germany. ’96

Eng-elharbt, Ernest C., Met 1022 So. 14th St., Denver, Colo. ’95

“English, Norris, Min. Engr 1268 Harrison St., Oakland, Cal. ’01

*Escher, Frank, Bir. Genl., Cia. Metal, de Torreon,Torreon, Coah., Mexico. ’99

Espinosa, Luis San Felipe de Jesus, 16, Mexico City, Mexico. ’02

*Esselstyn, John N., Cons. Min. Engr Baker City, Oregon, ’97

*Estabrook, John B Bavis Elms, Westboro, Mass. ’72

*Eurich, E. F., Cons. Engr., Am. Sm. & Eef. Co.,

71 Broadway, New York, N. Y. ’74

fEusTis, Augustus, H 11 Weld Hall, Cambridge, Mass. ’02

fEusTis, Frederick A 11 Weld Hall, Cambridge, Mass. ’02

*Eustis, William E, C., Mining and Smelting..60 State Street, Boston, Mass. ’76 *Evans, Bayid, Genl, Mgr , Mines and Works,

Care Bolckow, Vaughan & Co., Ltd., Middlesborough, England. ’96

*Eyans, Bavib T., Genl. Mgr Mt. Carbon Co., Ltd., Powellton, W. Va. ’99

*Ev-ans, George H., Civ., Min. and Mech. Engr Breckenridge, Colo. ’98

*Evans, Herbert A., Min. Engr., Care Dr. Evans, Greville Lodge,

Walm Lane, Willenden Green, London, N. W., England- ’94

*Evans, S. G., Min. Engr 640 St. Mark’s Ave., Brooklyn, N. Y. ’00

*Eveleth, J. K., Min. Engr... Pinos Altos G. M. Co., Pinos Altos, New Mex. ’87 *Eye, Clyde M., Supt, War Eagle Mining & Dev. Co.,

Bossland, B. C., Canada. ’98

*Eyles, Arthur H., Cbem. and Mgr., Continental Mfg. Co.,

Addingbam, Bel Co., Pa. ’00 *Eynon, David L. L., Cons. Engr., 1121 Shackamaxon St.,

Philadelphia, Pa. ’02

Eynon, Thomas M., Genl. Mgr., The Eynon-Evans Mfg. Co.,

15th and Clearfield Sts , Philadelphia, Pa. ’99 *Eyre, William P., Supt B. V. Sm. & Kef. Co., Buena Vista, Colo. ’00

*Fagkenthal, B. F., Jr., Pres, and Genl. Mgr., Thomas Iron Co.,

Easton, Pa. ’80

*Packenthal, John S., Mgr. , Blast Furnaces...ButtzYille, Warren Co N. J. ’87 *Fackenthal, Michael, Mgr., Peter Cooper Glue Factory,

Maspeth Ave., Brooklyn, N. Y. ’80

*Fairbaien, Alan J., Min. Engr Smuggler, Colo. ’02

*Fairbank, Wallace, Min. Engr. and Met Prescott, Ariz. ’96

**Faibchild, Sidney a., Min. Engr,, Cia, Minera Sta. Marie de la Paz y

Anexas, Calle de Br. Mier, No. 77, Monterey, Nueva Leon, Mexico. ’93 *Faiechild, S. E., Jr., Civ. and Min, Engr.,

25 N. Juniper St., Philadelphia, Pa. ’98

XXXViii MEMBERS AND ASSOCIATES.

*Fai-C 0 j Aghille, Min Engr. & Supt Mohawk M. Co., Prescott, Ariz. 99

Faeding, Frederic J., Cons. Chem. Engr...52 Broadway, New York, N. Y. ’84

*Faeish, Johx B., Min. Engr 517 Cooper Bldg., Denver, Colo. ’8S

*Farnum, Paul, Coal and Coke Operator Media, Pa. ’92

*Faerar, Sidney H., Civ. and Min. Engr.,

54 Old Broad St., London, E. C., England. ’90

*Fabrel, Franklin, Pres Fdy. & Mach. Co., Ansonia, Conn. ’90

’Farrell, Austin, Mgr., Blast Furnace, Cleveland Cliffs Iron Co.,

Gladstone, Mich. ’SO

*Fassett, Charles M., Assayer and Metallurgi't,

702 Main Ave., Spokane, Wash. ’95 **Fawcett, James H., Mgr., Federal Metal Agency Co., Ltd.,

1 Leadenhall St., London, England. ’96 *Fay, Albert H., Min. Engr., P. O. Box 223, 99 John St., New York, N.AT. ’02 *Fearn, Percy L., Min. Engr., Care United Mines Co ,

36 Wall St., New York, N. Y. ’89 *Feldtmann, W. R., Mgr., Bewick Moreing Co.,

P. 0. Box 120, Kalgoorlie, Western Australia. ’91

*Fell, E. Nelson, Min. Engr 31 Walbrook, London, E. C., England. ’00

*Felton, Edgar C., Pres , Pennsylvania Steel Co., 312 Girard Bldg.,

Philadelphia, Pa. ’81

*Fenner, Clarence N., Min. Engr Albion Place, Paterson, N. J. ’96

*Fergie, Charles, V. Pres, and Genl. Mgr., Intercolonial Coal M. Co., Ltd,,

Westville, Nova Scotia. ’93

*Fergeaeus, Torbern Nobel Works, Baku, Caucasus, Russia. ’02

*Ferguson, E, M 614 Ferguson Bldg., Pittsburg, Pa. ’78

fFERGUSON, John L., Treas., Wm. H. Hoskins Co., 904 Chestnut St.,

Philadelphia, Pa. ’96

*Ferguson, Vincent, Mgr., U. S. Cast Iron Pipe and Foundry Co.,

Bessemer, Ala. ’91

*Ferguson, Walton 48 Cedar St., New York, N. Y. ’79

*Fernandez, Roberto, Min. Engr Guanajuato, Mexico. ’97

f f F ebnow, B. E., Dir. , N. Y. State College of Forestry,

Cornell University, Ithaca, N. Y. ’87 *Fereieb, Walter F., Cons. Min. Engr., and Geol., Mgr., Gooderham-

Blackstock Synd., Rossland, B. C., Canada. ’99

fFEBBis, J. C Carthage, Mo. ’83

*Perey, Charles, Met. and Chem., Bridgeport Brass Co. and Ostrander

Fire-Brick Co. (Troy), Bridgeport, Conn. ’93 Feeey, Charles H., Mgr. Coupler Dept., Latrobe Steel & Coupler Co.,

1720 Old Colony Bldg., Chicago, Jll. ’91

Feustman, L. P Am. Sm. & Ref. Co., 71 Broadway, New York, N. Y. ’82

*PiELD, Frederick M., Cyanide Met Virginia City, Mont. ’00

Field, Wilerid B., Min. Engr., Care Explor. Co of N. Y.,

35 Wall St. , New York, N. Y. ’02 Fielding, Charles W., Min. Engr., Blake Hall, Ongar, Essex, England. ’99 Fielding, Prank E., Assayer and Chem., Cons. California & Virginia

M. Co,, Virginia City, Nev. ’90

*Fieeo, A. W., Rail Inspector 1137 Rookery, Chicago, 111. ’86

*PiGARr, Alberto, Min. Engr Apartado 405, Lima, Peru, So. America. ’91

*Filer, Walter G., Genl. Mgr 13 Atlas Block, Salt Lake City, Utah. ’99

*PiNCH, H. Wynne, Min. Engr., New University Club,

St. James St., S. W., London, England. ’98

Members Axb Associates.

*Finch, John W., Colo. State GeoL, Cons. GeoL of Woods

Investment Co., and other Mining Cos., Victor, Colo. ’00

*riiiLAy, James Ealph, Mine Supt Standard M. Co., Mace, Idaho. ’95

tPiMEY, Chakles E 71 Broadway, New York, N. Y. ’97

FiRMSTOsrE, Fkank, Mgr., Blast Furnace Easton, Pa. ’71

*Fiemstone, Harry, Pres., Longdale I. Co., 608 Chestnut St.,

Philadelphia, Pa. V5

*Fishbiirh, Bahdolph E., Min. Engr Union League Cluh, Chicago, 111. ’00

*Fisher, Clark, Civ. and Min. Engr Eagle Anvil lYlcs., Trenton, N. J. ’71

*PisHBR, Thomas, Genl. Supt.,Berwind-YVhite Coal M. Co., 305 Betz Bldg.,

Philadelphia, Pa. ’89

*Fisheb, William B., Min. Engr., Genl.Mgr., Am. Zinc, Lead & Sm. Co.,

Carterville, Mo. ’92

*Fisk, James H., Mine Engr. and Analytical Chem., 204 J Washington St.,

Portland, Oregon. ’00

**Fitch, Max B., Supt., Graphic Sm. Wks., Magdalena, Socorro Co.,

New Mexico. ’98

tFiTZG-ERAi/D, J. Mobton, Secy., Crane Iron Wks., Empire Steel & Iron

Co., etc., Catasauqua, Pa. ’01

*Fitzsimmons, Fbancis j., Engr Banamichi, Sonora, Mexico. ’98

*Flack, Charles L., Chemist Care Atha Steel Co., Harrison, N. J. ’90

*Flagg, Stanley G., Jr , Stanley G. Flagg & Co., 424 N. 19th St,

Philadelphia, Pa. ’92

*Flaherty, Robert H., Min. Engr Port Arthur, Ontario, Canada. ’93

*Fleming, Edward P., Min. Engr Troy, Ariz. ’02

Fleming, John B., Supt, Silver Eling Mill Park City, Utah. ’97

*Fletcher, Charles R., Chemist 82 Equitable Bldg., Boston, Mass. ’85

*Fltjker, Wm. H , Min. Engr., Columbia M. Co Tatham, Ga. ’02

**Flynn, Francis N., Acting Mgr., Avino Mines of Mexico, Ltd.,

San Gabriel, Durango, Mexico- ’98

*Fogh, H. P Seattle, Wash. ’99

**Fohr, Franz, Min. Engr. & Met 132 Nassau St., New York, N. Y. ’75

*Foote, Arthur Db W., Supt North Star Mines Co., Grass Valley, Cal. ’00

*Foot, Charles H Lock Box 1123, Phoenix, Ariz. ’88

*Foote, Emerson L 5833 Bartmer Ave., St Louis, Mo. ’82

*Foote, Frederick H 1037 The Rookery, Chioago, 111. ’90

**Forbes, Donald G Great Western Mines, Ferguson, B. C., Canada. ’94

*Porbes-Leith, a. j., Pres. ..Joliet Steel Co., 71 Broadway, New York, N. Y. ’79

*Foebes, Paul R., Metallurgist Walsh Hall & Co., Yokohama, Japan. ’95

*Ford, Edward L., Genl. Supt Youngstown Steel Co., Youngstown, Ohio. ’79

*Foedycb, John R., V. Pres, and Genl. Mgr., Thomas Fordyce Mfg. Co.,

2223 Louisiana St, Little Rock, Ark. ’92 **Foeeester, Robebt, GeoL and Min. Engr.,

P. O. Box 1254, Salt Lake City, Utah. ’02' *For8YTH, Alexander, Min. Engr. and Met.,

P. 0. Box 557, Cripple Creek, Colo. ’97

Foesyth, Robert, Cons. Engr 1143 Rookery, Chicago, 111. ’75

*Forsythe, Robert J 2614 W. 3d St, Chester, Pa. ’96

*Foster, Alfred L., Civ. Engr., 222 Victoria Arcade,

Auckland, New Zealand. ’00

Foster, Clement Le Neve, Prof, of Mining, Royal College of Science,

South Kensington, London, S. W., England. ’93

xl MEMBERS AXD ASSOCIATES.

*rosTEE, Ebnest Le Nete, Min. Engr., 419 Taber Opera House,

Denver, Colo. 75

Foster, Floyd J Villaldama, N. L., Mexico. 02

fFosTEE, OscAB K., Inspector Carnegie Steel Co., Homestead, Pa. ’99

*Fosteb, Philip L., Genl. Mgr El Oro M. & Ey. Co., El Oro, Mexico. ’93

*Fosteb, Rtipe-s J., V. Pres, and Mgr. of Periodical Dept., Intemat.

T. B. Co., Scranton, Pa. ’90

Foucab, Edouard L., Min. Engr Sterns, Roger & Co., Denver, Colo. ’85

*Fowleb, Edward J., Met 719 Cole Street, San Francisco, Cal. ’00

*Fowxeb, Samuel S., Mgr & Min. Engr., London &B. C. Goldfields, Ltd.,

Nelson, B. C., Canada. ’92

*Fbahcis, Geobge G., Min. Engr., 9 Queen St. Place, Upper Thames St.,

London, England. ’80

Fbahcis, Lewis W., Secy., Witherbee, Sherman & Co., Inc.,

71 Broadway, New York, N. Y. ’89

*Franckly"N, Chables G 29 Broadway, New Yoi*k, N. Y. ’80

*Fbahe:e, Emil A , Min. Engr. and Supt., The New Departure Mining

and Milling Co., Cordes, Ariz. ’02

Fbasuh, H., Oil Refiner 681 Euclid Ave., Cleveland, Ohio. ’93

Fraser, Joseph D., Mgr., Iron and Coke Depts., Nova Scotia Steel and Coal

Co., Ltd., New Glasgow, Nova Scotia. ’94 **Frazer, DB.PEKSiEOE,Geol.& Chem., 1042 Drexel Bldg., Philadelphia, Pa. ’71 Fbaziee, B. W., Prof. Mineralogy and Metallurgy, Lehigh University,

South Bethlehem, Pa. ’71

Feecheville, Robert J., Min. Engr., 7 Lothbury, London, E. C,, England. ’84 Fbecheyille, William, Min. Engr., 35 Queen Victoria St.,

London, E. C., England. ’84 Feeelahd, Frakcis T., Mgr., Durant M. Co., etc.,

P. 0- Box 1016, Aspen, Colo. ’85 *Feeel AND, William PI, Genl Mgr., D. S. Coal &Iroii Co., Isabella, Tenn. ’01 Fbeemah, Stanton S., Supt. of Furnaces, Carbon Iron & Steel Co.,

Parry ville, Pa. ’01

fPiiEEMAN, William Coleman, Chairman Robesonia Iron Co., Ltd.,

Robesonia, Berks Co., Pa. ’77

*French, Edmund L., Met. Engr., Crucible Steel Co. of America,

Syracuse, N. Y. ’00

*Fbio 3I, H. C., Coke Mfr Carnegie Bldg., Pittsburg, Pa. ’79

Fricke, F. G., Analytical and Cons. Chemist Bissell Blk., Pittsburg, Pa. ’79

Fbiche, John H., Mining Hillsboro, New Mex, ’88

*Fritz, John Bethlehem, Pa. ’72

*Frobhlino, Henry, Analytical Chem., 17 S. Twelfth Street, Richmond, Va. ’90 *Fbossard, John D., Cons, and Min. Engr...Orthez, Basses-Pyrenees, France. ’85 Fuchs, Fernando C.. Min. Engr., Sociedad de Ingenieros,

Apartado 981, Lima, Peru, So. America. ’02 *Fuente, Jesus de la, Member of State Congress and Chief Engr, of the

Nadadores Valley Co., Nadadores, Coahuila, Mexico. ’02 Fuller, James W., Genl. Mgr., McKee, Fuller & Co. Car Wheel and

Axle Wks., Catasauqna, Pa. ’94

Fuller, James W., Jb Catasauqua, Pa. ’94

*Fulton, John, Min. Engr 136 Park PL, Johnstown, Pa. ’72

*Fulton, Walter M., Genl. Mgr., Taitapu Gold Estates, Collingwood,

Nelson, New Zealand. ’97

Members And Associates.

Furness, Dwight, Merchant and Miner, Apartado 2, Guanajuato, Mexico. 02 Furhess, James W., Assayer & Chem., Golden Cycle M. Co.,

Goldfield, Colo. 00

Fijsz, Paul A ,..422 Security Bldg., St. Louis, Mo. 79

*Gage, Eliphalet B., Pres., Congress Gold Co. and Tombstone Con. Alines

Co., Ltd., Tombstone, Ariz. *99

IGaines, Ambrose P Bessemer, Ala. *88

*Gallagher, James B. , Assayer and Chem., Colo. Sm. & AI. Co. ,

Butte, Alont. *00

*Garcia, Telesforo, Jr., Engineering, Sta. Teresa 2, Apartado 463,

Alexico City, Alexico. *02

Gardjs-er, G. Clinton, Flemington Coal and Coke Co ,

35 Wall St, New Tork, N. Y. *78

*Garlner, George C. , Min. Engr Address wanted. *83

Garfield, Charles D Box 327, Juneau, Alaska. *02

*Gablichs, Herman, Supt , Lead Dept., Perth Amboy Plant, Am. Sm. &

Ref. Co., Maurer, N. J. *89

Garretson, Oliver S., Smelter & Alfr 786 Ellicott Sq., BuSalo, N. Y. *98

*Garrett, William, Pres., Garrett-Cromwell Engineering Co.,

1101 New England Bldg., Cleveland, Ohio. *81

*Garrigues, W. E., Chem. Engr 1123 Broadway, New York, N. Y. *98

*Garrison, F. Lynwood, Alin. Engr. ...1019 Clinton Street, Philadelphia, Pa. *83 Gaeside, George W., U. S. Surveyor and Min. Engr., Juneau City, Alaska. *93 *Garthwaite, E. H., Resident Alin. Engr., British South Africa Co.,

Bulawayo, Rhodesia, So. Africa. *82 *Gabvin, John AI., Furnace Algr. Brass Fdy. & Mach. Co., Rock Run, Ala. *92

*Gatzmer, William C., Civ. and Alech. Engr Tacony, Philadelphia, Pa. *88

“Gaujot, Claude L., Civ. and Min. Engr., Ohio & Big Sandy Coal Co.,

AYilliamson, W. Va. *00

*Gay, Ware B., Receiver, Richmond Coal AI. & Alfg. Co., Mayo Bridge,

Richmond, Va. *95

*Gayhart, AValter C., Alin. Engr. and Alet., Tonopah City M. Co.,

Austin, Nev. *00

*Gayley, James C are U. S. Steel Corp., 71 Broadway, New York, N. Y. *80 “Gaylord, Frank B., Blast Furnace Mgr., Deseronto Iron Co., Ltd.,

Deseronto, Ont, Canada. *00

**Gazzam, Joseph P., Genl. Mgr., Simmer Jack Prop. Alines, Ltd.,

P. 0. Box 192, Germiston, Transvaal, So. Africa. *84

**Gennes, a. a, de, Min. and Civil Engr 25 Rue Rafiet, Paris, France. *02

*Georgb, R. D., Prof, of Geology and Petrology, U. of I., Iowa City, Iowa. *02

"Geppert, Richard AI., Min. Engr. Silver Peak, Nev. *02

’**’Gerhausee, William, Pres. , Deseronto Iron Co., Ltd., & The Arizona Co. ,

614 Majestic Bldg., Detroit, Mich. ’88

*Germann, Franz La Paz, Bolivia, So. America. ’00

*Gibb, Allan, Miner and Metallurgist, The Queensland Copper Co., Ltd.,

Mount Perry, Queensland, Australia. 00

*Gibson, Charles H., Min. Engr P. 0. Box 1479, New York, N. Y. *82

*Gibson, Robert, Mine Mgr Kalgoorlie, Western Australia. *92

’Gibson, Thomas W., Dir Bureau of Mines, Toronto, Ont., Canada. *01

*Giffobd, Stanley, Treas. & Dir. , Montana Ore Purchasing Co. , U. S. C.

Co., & Nipper Cons. Copper Co., 31 Nassau St., New York, N. Y. *95

Members And Associates.

**G-ilbeet, G. K., Geologist U. S. Geol. Survey, ashington, D. C. 92

GILBERT, Henderson, Civ. Eagr.. 219 Market St, Harrisburg, Pa. ’02

*Gilchrist, John B., Mine Supt, Colorado Fuel& Iron Co., Boston Bldg.,

Denver, Colo. ’9B'

**Gilc!HR1ST, Percy C., Met., Frognal Bank, Finclily Hoad, NA\

London, England. ’91

*Gilbemeister, Db. F., Min. Engr. ...Sclieppelstr. 6, Heidelberg, Germany. 91 tGiLEESPiE, T. A., Genl. Supt., Pennsylvania Co., Penn and Homewood

Aves., Pittsburg, Pa. ’86

fOiLEET, Lorenzo M., Treas., Hormiguero Central Co.,

69 Wall St., 2Cew York, N. Y. ’93

Gieeie, John, Supt Butte <fe Boston Con. M. Co., Butte, Mont. ’87

Gilpin, Francis, Mine Mgr Colorado Springs, Colo. ’99-

Hinder, \yiLLiAM H. H., Chief Chem., Am. Sheet Steel Co.,

Vandergrift, Pa. ’00'

*Gipp8, Frederick deV., Min. Engr., Euriowie Tin Mines,

Broken Hill, New South Wales, Australia. ’94 *GiRAt7LT, Edmond, Cons. Min. Engr., 2a Presidente, 1426,

Mexico City, Mexico. ’98

Gmoijx, Eugene L., Min. Engr 721 Equitable Bldg., Denver, Colo. ’96

Giroux, Joseph L., Mine Mgr Jerome, Ariz. ’02'

Glassbrook, Ceabence L, Mine <fc Mill Supt ,

320 W. Hallam St., Aspen, Colo. ’02

Gleim, Fritz, Supt Rockhill Furnace, Bockhill, Pa. ’92

*Glenn, Leonidas C., Prof., Geology, Vanderbilt University,

Nashville, Tenn. ’00-

*Glenn, WTeliam, Mgr., Baltimore Chrome Works,

1848 Block St., Baltimore, Md. ’81 *Gmelin, Ernest, Genl. Mgr., Cia. Minera de Candelaria y Anexas,

Pinos, Zacatecas, Mexico. ’98- *Goddaed, Sydney F., Min. Engr., Manor House, Bulcote,

Nottinghamshire, England. ’98 Godfrey, Eli Sandford, Min. and Mech. Engr.,

203 Broadway, New York, N. Y. ’93- Godfrey, JohnE., Govt. Insp. of Mines, Dept, of Mines,

Sydney, New South Wales. ’97

fGoDLEY, George McM., Care Warren Foundry and Machine Co ,

160 Broadway, New York, N. Y. ’98'

*Godshale, Harvey H., Chem. and Min. Engr Lansdale, Pa. ’00

Godshale, L. D., Met Grand Encampment, Wyoming. ’94

*Gomez, Perfecto, Min. Engr., Somallera Lejarza Co.,

Santa Lucia, Sinaloa, Mexico. ’99-

*Good, George McC. H., Engr. of Mines Osceola Mills, Pa. ’87

*Goodale, Charles W., Min. Engr., Asst. Mgr., Boston <fe Montana Con.

Copper & Silver M. Co., Butte, Mont. ’76 Goodland, Gielmore, Min. Engr., 109 Victoria St,, Westminster,

London, S. W., England. ’99' *Goodloe, Meade, Asst. Supt, Congress Cons. M. Co., L-td., Congress, Ariz. ’96 **Goodrich, R.R., Min. Engr,, The Colonial, Wilkinsburg Sta., Pittsburg, Pa. ’88

Goodspeed, Wm. a., Supt of Mines Longacre, W. Va. ’02

Goodwin, Edward, Min. Engr Kenwood, Cal. ’91

*GdBANSS0N, Karl F., Met Sandviken, Sweden. ’01

Members Associates.

Gordon, Alexander... Hamilton, Ohio. '84

Gordon, Henry A., Civil and Min. Engr., Bank New Zealand .,

Auckland, New Zealand. ’87 Gordon, John, Miner and Merchant, Caixa 35, Correio,

Rio de Janeiro, Brazil, So. Amer. ’00’ **Gordon, William B., Mining Machinery, P. 0. Box 2646,

Johannesburg, Transvaal, So. Africa. ’96-

*Gore, James B., Assayer and Met Hodson, Calaveras Co., Cal. ’01

*Gorham, Austin G., Pres., Gorham Coal Co., Sherman M. & MBlg.

Co., etc., 33 Barth Block, Denver, Colo. ’81 *Gormly, Samuel J., Asst. Supt., Sampling Wks., Anaconda Copper M. Co.,

Box 32, Anaconda, Mont. ’00-

*Goss, Edward 0., Asst. Treas Scovill Mfg. Co., Waterbury, Conn. ’94

*Gottsberger, B. Britton, Min. Engr., Care Tennessee Copper Co.,

Copperhill, Tenn. ’01

*Gould, Charles J., Assayer and Surveyor, The Parral Mines, Ltd.,

Parral, Chihuahua, Mexico. ’99

*Gould, Charles Newton, Prof, of Geol., University of Oklahoma,

Norman, Okla. Ty. ’02

Ooupilliere, Prof. Haton de la, Inspector General of Mines,

56 Rue de Vaugirard, Paris, France.

*Gouyard, Gustave M., Met 1620 Clarkson St, Denver, Colo. ’96

*Gow, P. George, Min. Mgr Bohemian Club, San Francisco, Cal. ’GO'

**Grace, William F., Min. and Met. Engr., 54 York Road,

Hove, Sussex, England. ’95

*Graham, Ernest, Met Chem., Charters Towers,

North Queensland, Australia. ’GO* ♦Grajbcam, Walter, V. Pres, and Genl. Mgr., Graham Iron Co., Graham, Va. ’00

*Grammer, F. Louis 2422 Madison Ave., Baltimore, Md. ’92

ANGER, Arthur 0., Pres., Caribbean Co., and G. D. Co.,

Real Estate Trust Bldg., Philadelphia, Pa. ’91

*Granger, Henry G Quibdo, Choco, Colombia, S. America. ’95

*Gbanstrom, Gustaf a., Min. Engr. Karrgrufven, Sweden. ’98

*Grant, Geo. H., Geol. and Min. Engr., Care Capt Wm. Grant,

Point Ellice, Victoria, B. C., Canada. ’01

*Grant, James B 777 Pearl St, Denver, Colo. ’89

*Grant, Robert J., Asst. Mgr...Stratton’s Independence, Ltd., Victor, Colo. ’99* *Grant, Ulysses S. , Prof. , Geology, Northwestern University, Evanston, 111. ’ 01

*Gbassblli, C. a Grasselli Chemical Co., Cleveland, Ohio. ’92

*Grave, Ernest, Mill Mgr., San Luis Mining Co., Panuco de Coronado,

Durango, Mexico. ’98

*Grave, Percy, Mn. Engr 6a Victoria 62, Durango, Mexico. ’98-

Graves, Fayette P., Supt. Mines Doe Run Lead Co., Doe Run, Mo. ’92

*Graves, McDowell, Min. Engr., Compania Mexicana,

. Apartado 2032, Mexico City, Mexico. ’02

*Grayson, Laurence W., Cons. Min. Eng. & Met, Ludstone Chambers,

352 Collins St, Melbourne, Victoria, Australia. ’OO

*Geeen, Charles B., Chemist 79 N. 4th St., Easton, Pa. ’87

*Geeenamyer, Arthur G., Chemist Leetonia, Ohio. ’02

Greene, Francis V., Man. Dir,, New Trinidad Lake Asphalt Co.,

11 Broadway, New York, N. Y. ’88 *Gbbene, Fred. T., Min. Engr Anaconda Copper M. Co., Butte, Mont ’99-

Membbus And Associates.

Gkeenway, Thomas J., Met., Chillagoe M. & Ey. Co., Chillagoe,

No. Queensland, Australia, and 14 Sumner St., Cambridge, Mass. ’95 Gregson, William Hildee, Mining and Metallurgy,

Broken Hill, New So. Wales, Australia. ’02 Geeslby, Wm. S., Cons. Coal Min. Engr., 115 Badbourne, Derby, England. ’91 Geey, George R., Civ. and Min. Engr., P. 0. Box 777, Johannesburg,

Transvaal, So. Africa. ’89

*Geiee, Thomas J., Supt Homestake M. Co., Lead, So. Dakota. ’92

Griffin, Feahk W., Pres., Western Eng. and Cons. Co.,

249 Safe Deposit Bldg., San Francisco, Cal. ’02

Gbiffin, H. M., Mine Owner 503 McPhee Bldg , Denver, Colo. ’82

Geiffiji, Martin L., Chemist The Duncan Co., Meehan icsville, N. Y. ’89

Griffin, Maurice Edward, Secy., West. Eng. and Cons. Co., San Francisco, Cal. ’02

Griffin, P. H., Pres N. Y. Car Wheel W'ks., Buffalo, N. Y. ’91

Griffith, Charles G., Min. Engr 63 Wall St., New York, N. Y. ’96

Griffiths, Andre P., Mn. Engr., Genl. Mgr., of the Palmarejo and

Mexican Goldfields, Ltd., Chinipas, Chihuahua, Mexico. ’96 'Griffiths, Harry D., Min. and Mech. Engr., Genl. Mgr., Clarks Cons.,

Ltd., P. 0, Box 201, Bulawayo, Rhodesia, So. Africa. ’98

ttGRiFFiTHS, Howard B., Civil Engr 2105 Boulevard, Wilmington, Del. ’77

Griffiths, John N 10 So. Hyde Park Mansions, London, W. , England. ’00

IGriggs, Thomas W., Secy, and Treas. Security Investment Co.,

Davenport, Iowa. ’99

*Grillo, Julius, Engr Neumiihl, Hamborn, Rheinland, Germany. ’96

Griswold, Leon S., Cons. Engr. and GeoL, 238 Boston St ,

Dorchester, Mass. ’00

Griswold, William T., Topographer, U. S. Geoi. Survey, Washington, D. C. ’00

*Grittinger, Henry C., Mgr Cornwall Furnace, Cornwall, Pa. ’79

*Gbitzner, F. a., Chem. and Assayer 436 E. 63d St., Chicago, 111, ’87

*Gross, John, Min. Engr Penobscot M. Co., Deadwood, So. Dakota. ’96

Gbothe a., Min. Engr Zimapan, Hidalgo, Mexico. ’86

'5Grubb, Charles B., Mfr. Pig-Iron Lancaster, Pa, ’87

Gue, T. B...Pres., Acadia Powder Co., P. 0 Box 520, Halifax, Nova Scotia. ’89

*Guess, Harry A., Min. Engr The Silver Lake Mine, Silverton, Colo. ’00

Guinn, John B., Min. Engr ,416 Joplin St., Joplin, Mo. ’97

fGuNN, Thomas, Contractor Brisbane St, Launceston, Tasmania. ’01

*Gwillim, JohnC Nelson, B. C., Canada, ’01

*Haas, Frank Fairmont Coal Co., Fairmont, W. Va. ’97

*Ha AS, Herbert, Chem. & Met., Apartado 116, Torreon, Coahuila, Mexico. ’02

*Haas, Jacob C., Min. Engr So. 6th Post St , Spokane, Wash. ’98

IHaasis, Albert L Jos. Dixon Crucible Co., Jersey City, N. J, ’92

Haasis, Dunbar F., Supt., U. S. Govt. Harbor Improvement Plant,

XJ. S. Steamer “Gedney,” Perth Amboy, N. J. ’86

Hackett, Wm. H., Min, Engr Person C. & G. M. Co,, Durgy, N. 0. ’02

Haddock, John C — 1 Broadway, New York, N. Y. ’91

*Hadpibld, R. a., Chairman and Man. Dir., Hadfield’s Steel

Foundry Co., Ltd., Hecla Wks., Sheffield, England. ’89 'Hagemann, Wilhelm, Ore Agt, Gia. Metallurgica de Torreon,

Parral, Chihuahua, Mexico. ’00

*Haqgen, Edward A., Min. Engr Revelstoke, B. C., Canada. ’00

"Haggott, Ernest A., Min. Engr Prescott, Arizona. ’02

Members And Associates.

*Haggott, Warren A. Idaho Springs, Colo. ’01

Hague, Arnold, Geologist U. S. Geol. Survey, AYashington, D. C. ’74

’Hahn, 0. H, Min. and Met. Engr Care A. Hahn, Apolda, Germany. ’71

*Haldeman, Horace L., Treas , Pulaski Iron Co , 330 Walnut St.,

Philadelphia, Pa. ’80

*Hale, Irving, Elec. Engr, Mgr., Denver Office, Genl. Electric Co.,

Kittredge Bldg., Denver, Colo. ’92 *Hall, Benjamin M., Civ. and Min. Engr., 411 Temple Court, Atlanta, Ga. ’95

*Hall, Charles M., V. Pres Pittsburg Red. Co., Niagara Falls, N. Y. ’90

Edgar, Min. Engr. and Met., Man. Dir., Silver Spur M. Co. (of

Stanhope, Queensland), Tenterfield, New South AYales. ’90 Hall, Edward J., Perth Amboy Terra Cotta Co., 15 Dey St.,

New York, N. Y. ’76

*Hall, Everett J., Assayer Columbia University, New York, N. Y. ’02

*Hall, Geo., Min. Engr., Mina El Carmen, El Oro, E. de Mexico, Mexico. ’01 *Hall, Harry R., Lake Superior Power Co., Sault Ste. Marie, Ont., Canada. ’91 *Hall, Newman G., Mine Mgr., Percy La Salle M. A P. Co., Aspen, Colo. ’02 *Hall, Samson AY., Min, Supt. and Mgr , Iron Mask G. M. Co.,

Rossland, B C., Canada. ’98 *Halloran, Joseph F., Editor Mining and Scientific Press,

330 Market St., San Francisco, Cal. ’00 *Halse, Edward, Care Seiiores J. M. y E. Montoya, Puerto Barrio,

Colombia, So. America. ’96

*Hambleton, James W., Supt. of Mines, 13 San Juan de Letran,

Mexico City, Mexico. ’02

Hamilton, Charles A., Cons, and Min. Engr., Room 1209 Claus

Spreckels Bldg., San Francisco, Cal. ’99 Hamilton, Frank C., Comp. Minera de Penoles, Mapimi,

Durango, Mexico. ’93

Hamilton, Richard, Mine Mgr., Great Boulder Mine,

Boulder, AAestern Australia. ’98 Hamilton, Thomas Moore, Min. Engr., 446 Lawrence St., Helena, Mont. ’02 Hammer, Alfred E., Chemist, Supt. of AYorks, Malleable Iron Fittings Co.,

Branford, Conn. ’92

Hammer, John G., Mgr Butte Sewer Pipe & Tile Co., Butte, Mont. ’87

*IIammon, Wendell P Boston A Oroville M. Co., Oroville, Cal. ’01

'Hammond, Isaac B., Mech. Engr., Pres., Hammond, Mfg. Co., Inc.,

100 First St., Portland, Ore. ’87

*Hammond, John Hays, Cons. Engr 35 Wall St, New York, N. Y. ’81

Hampton, William Huntley, Min. and Hyd. Engr., Chemist,

Columbia Mines Co., Inc., Placer, Josephine Co., Ore. ’90 *Hanchett, Lafayette, Mine Mgr., The Argo M., Drainage,

Transportation and Tunnel Co., etc., Idaho Springs, Colo. ’00 *Hancock, H. Lipson, Min. Engr., Mgr., Wallaroo A Moonta M. A

Sm. Co., Ltd., Wallaroo A Moonta Mines, So. Australia. ’99 Hancock, Strangman, Min. Engr., Jumpers Deep Cleveland,

Johannesburg, So. Africa. ’89 Hanks, Abbot A., Chem. and Assayer, 531 California St., San Francisco, CaL ’9Y

*Hanley, Herbert R., Min. Engr Winthrop, Shasta Co., Cal. ’01

*HANLBy, J. A., Jr Apartado 27, Aguascalientes, Mexico. ’01

*Hanna, George B., Asst. Assayer, U. S. Assay Office,

P. 0. Box 26, Charlotte, N. C. ’87

Membejeis And Associates.

xhi

Hannahs, GrEOuaE L., Mine Mgr Bingham P. 0., Utah. 99

*HAis"S02r, Rasmus, line Owner Eureka, Colo. ’9f>

*Haruen, Edwaed B., Civ. and Min. Engr., 3201 Baring St.,

Philadelphia, Pa. U3

Hardex, John H., Min. Engr P. 0. Bldg., Phcenixville, Pa. 71

*Habde.vbergh, William P, Y. Pres., New Jersey Zinc Co.,

11 Broadway, New York, N. Y. ’94

Haedekbubgh, Louts M., Supt Cary Mine, Hurley, Wis. 98

Habdin, AVillett L., Min. Eng. and Chemist, P . 0. Box 235, Prescott, Ariz. ’00

Habdinge, Hal. W., Min. Engr P. 0. Box 1445, Denver, Colo. ’02

Habdison, Allen 0., Supt Crown King Mine, F’rescott, Ariz. 99

Hardman, John E., Cons. Min. Engr Windsor Hotel, Montreal, Canada, ’82

*Hardt, Anton, Chf. Engr Fall Brook Coal Co., Wellsboro, Pa. ’90

Hardwick, Francis YC, Min. Engr , Prof, of Mining, University College,

Sheffield, England. ’89

Hardy, James G., Min. Engr, Care Creston Colorado Co.,

Torres, Sonora, Mexico. ’94

*Hare, a. W., Chem. and Assayer P. 0. Box 381, Aspen, Colo. ’89

Harmon, Dana, Mine Supt Hayward Bldg. , San Brancisco, Cal. 00

*Harms, Ernst, Supt Cia. Metal de Torreon, Torreon, Coah., Mexico. ’97

Harnden, Feedebiok: E Puget Sound Red. Co., Everett, Wash. ’94

’Harper, Joseph H., Min. Engr Harper & Macdonald, Butte, Mont. ’87

Harrington, Dr. Bernard J., Dir., Macdonald Chemistry and Mining

Bldg., McGill University, Montreal, Canada. ’77

tHARBiNGTON, Edwin I, Dr lOO N. Broadway, Yonkers, N, Y, ’01

Harrington, Harry G., Asst., Engineering Dept., The New Jersey

Zinc Co , 11 Broadway, New York, N. Y. ’01 *Harbis, Frederick S., Mine Owner, 603 N. Y. Life Bldg.,

Kansas City, Mo. ’97

Harris, George W., Associate lSiditoT...Mines and Minerals-, Scranton, Pa. ’92 Harris, Harold X, Supt., Alto Condor G. M., Abrapampa,

Prov. of Jujuy, Argentine Rep. , So. America. ’97

Harris, Willard F., Min. Eng Camp Bird Mills, Ouray, Colo. ’02

Harris, William J., Min. Engr 118 Elm St, Montclair, N. J . ’71

*Harrison, Alfred William, Min. Engr...P. 0. Box 129, Silverton, Colo. ’01 Harrison, C. Leland, V. Pres, and Treas., Harrison Bros. & Co., Inc.,

35th St. and Gray’s Ferry Boad, Philadelphia, Pa. ’96 *Harbison, L. B., Dwight, Furness Co., P. 0. Box 27, Aguascalientes, Mex. ’00

*Hart, Edward, Prof, of Chemistry Lafayette College, Easton, Pa. ’81

*Hart, Biohabd G., Genl. Mgr. 606 Hearst Bldg., San Francisco, Cal. ’00

Hartman, John M , Mech. Engr 1235 N. Front St., Philadelphia, Pa. ’75

**Hartman, T. F., Ivanhoe SI Extended Co., Boulder, Western Australia. ’02 Hartbanft, S. S., Supt., Neville Wks,, Am. Steel Wire Co.,

Neville Island, Allegheny Co., Pa. 77

*Habtrick, John Standish, Care H. T. Tisdall, Washington St.,

Toorak, Melbourne, Victoria, So. Australia. ’91

Habtshorne, Joseph, Cons. Met. and Mech. Engr Pottstown, Pa. ’73

*1Iartung, Frank H., Chem. and Assayer,

338 W. Portsea St, New Haven, Conn. ’99

*Hartzell, Dr. H. K., Mine Mgr 8th and Walnut Sts., Allentown, Pa. ’92

Harvey, Frederick H., Min. Engr. Galt, Sacramento Co., Cal. ’95

*Harvey, Wm. S 119 So. 4th St, Philadelphia, Pa. ’02

Members And Associates.

*Haskeli., Habry G., Secy Eepamio Cheni. Co., Wilmington, Del. '94

Haskell, J. Amory, Pres., Laflin & Band Powder Co.,

99 Cedar St., New York, N. Y. '88 Haskins, Willia:m S., Supt., Iron Mountain Mine, Mountain

Copper Co., Keswick, Cal. '00

**Hastings, John B., Min. Engr 20 Broad St, New York, N. Y. '86

*Hatch, Frederick H , Min. Engr., Hatherley Bldg. ,

P. O. Box 1030, Johannesburg, So. Africa. '98

*Haultain, Herbert E. T., Min. Engr Nelson, B. C, Canada. '98

*Haverstick, John Edward, Treas., Bockhill Iron and Coal Co.,

320 Walnut , Philadelphia, Pa. '02 *Hawh>on, William. ..Newport Iron W'ks., Middlesboro-on-Tees, England. '99 *''Hawker, Edward AV., Lecturer on Mining, South Australian School

of Mines, 8 Alma Chambers, Adelaide, South Australia. '92 Hawkins, Edwin N., Met, and Min. Engr., 208 Opera House Bldg.,

Denver, Colo. '90

Hawkins, J. D., Genl. Supt , Colo. -Phila. Bed. Co., and Standard

Milling & Sm. Co., Colorado Springs, Colo. '93 *Hay, Alex. M., Pres , Dominion G. M. & Bed. Co., Ltd.,

Bat Portage, Ontario, Canada. '01 **Hay, Henry, Mine Mgr., Witwatersrand Deep, Ltd , etc., Bor 5,

Knights, Transvaal, So. Africa. '01

*Hayes, C. Willard, Geologist U. S. Geol. Survey, Washington, D. C. '92

*Hayes, Geo. W., Civ. Engr. and Chem , West end Willow St., Lebanon, Pa. '94 Hayward, J. L., Boston Colombia Gold Dredging Co.,

Quibdo, Colombia, So America. '02

Hazard, Frederick B., Pres Solvay Process Co., Syracuse, N. Y. '99

*Hazleton, Simeon C., Asst Supt, Germania Plant Sm. & Bef. Co-,

Murray, Utah. '91

*HEADDEf, William P., Prof, of Chemistry and Geology, Colo. State

Agricultural College, Fort Collins, Colo. '89 *Heal, John H., Min. Engr., 8 Newton Grove, Bedford Park,

London, W., England. '01

*Healey, Arthur E., Supt Inter-Ocean G. M. Go., Sunshine, Colo. '02

*Healy, John B., Assayer 282 Congress St, Boston, Mass. ’ 99

*Hearnb, D. Garth, Civil Engr., Pres., Eagle Fluor-Spar Co.,

Wheeling, W. Va. '95

*Hearnb, Frank J., Pres., National Tube Co., 1712 Frick Bldg.,

Pittsburg, Pa. '74

*Hbarne, Julian G., V. Pres., Black Diamond Copper Min. Co.,

Black Diamond, Ariz. '00

*Hbath, George L., Chem. and Met., Calumet & Hecla Sm. Wks.,

South Lake Linden, Mich. '91 *Heathcote, Charles F., Genl. Mgr., Tasmania Gold M.

&Q. C. Co., Beg., Beaconsfield, Tasmania. '97 *Hebbabd, Jas., Asst. Mgr., Sulphide Corpn., Central Mine,

Broken Hill, New South Wales. '01

fHBERT, Fernand, Min. Engr 21 Bue de Berne, Paris, France. '95

*Heckelmann, Otto, Ore-Testing and Sampling Wks., Heckelmann,

McCann Co., Independencia 36, Mexico City, Mexico. '02 Heoksoher, August, Genl. Mgr., New Jersey Zinc Co.,

11 Broadway, New York, N. Y. '79

Members And Associates.

*Heckschek, Richabb P., Iron Mfr...4th and Walnut Sts , Philadelphia, Pa. ’9B *B[EaELEE, Edward C., Pres., Matthiessen Hegeler Zinc Co.. La Salle, III. ’81 Hegeler, Julies W., Chief Engr., Matthiessen & Hegeler Zinc Co.,

La Salle, 111. ’92

Heidenreich, E. Lee, Engr. and Contractor 541 Rookery, Chicago, 111. ’88

*Heir:es, Victor C., Assayer and Chem., 116 Administration Bldg.,

World's Fair, St. Louis, Mo. ’96

IHeinze, F. August, Mine Mgr. and Owner Bntte, Mont. ’89

Hellberg, Gustae a., Min. Engr..Commonwealth Iron Co., Norway, Mich. ’94 Heller, Martin" J., Min. Expert. ..210 Crocker Bldg., San Francisco, Cal ’96 Hellman, Frederick, Min. Engr., Genl. Mgr , East Rand Prop.

Mines, Ltd , P. 0. Box 204, Bokshurg, Transvaal, So. Africa. ’97 *Helm, J. D., Supt., Minas Tecolotes j Anexas,

Santa Barbara, Chihuahua, Mexico. ’02 *Helms, Albert, Cons, and Anal. Chem., 8 Bridge St.,

Sydney, New South Wales. ’89 Henderson, James A. L., Min. Engr., Sein Court, Comhill,

London, E. C., England. ’98

*Henderson, John C., M. E .758 West End Ave., New York, N. Y. ’91

**Henderson, j. McClelland, Min. Engr. and Geol Lander, Wyo. ’96

*Heneage, Everard Marlborough Club, Pall Mall, S. W., London, Eng. ’02

Henley, James H., Mine Supt Elkton Cons. M. &M. Co., Elkton, Colo. ’90

Henne, Christopher, Min. and Mech. Engr., 210 Henne Bldg.,

Los Angeles, Cal. ’00

*Hennin, Alphonse, Dir., Gn4ral de I’Elba Societe,

Porto Ferrajo, Isle d’ Elba, Italy. ’88

*Henning, Gus C., Cons. Mech. Engr 220 Broadway, New York, N. Y. ’86

*Henrich, Carl, Cons. Min. Engr. ,

Room 1014, 25 Broad St., New York, N. Y. ’82 Hernandez, Marcos F., Min. Engr., Banco Mercantil,

Monterey, N, L., Mexico. ’02

Hebndon, Edward L 38 H Pine St., St Louis, Mo. ’82

*Herr, Hiero B., Civ. and Min. Engr 1246 Marquette Bldg, Chicago, 111. ’76

Herreshopf, j. B. F., Chem Laurel Hill, Long Island, N. Y. ’86

Hebron, David A. , Min. Engr Whiterock, Nevada. ’97

*Heesam, Ernest A,, Asst. Prof, of Metallurgy Univ. of Cal., Berkeley, Cal. ’99 Herzig, Charles S., Min. Engr. (Nahe) Windhoek, German

So. West Africa. ’95

*Hesse, Conrad E., U. S. Weather Bureau, 807 Massachusetts Ave., N.E.,

Washington, D. C. ’90

*Hewett, G. C., Min. Engr 9 De Graff Bldg., Colorado Springs, Colo. ’83

*Hewitt, Abram S., Iron Mfr 17 Burling Slip, New York, N. Y. ’71

*Hewitt, Edward R., Chem 13 Burling Slip, New York, N. Y. ’94

Hewitt, George H., Met. and Assayer 707 State St., Springfield, Mass. ’80

Heywood, William A., Smelter Supt., Tenn. Copper Co., Copperhill, Tenn. ’96 Hibbard, Henry D., 2d V. Pres., Hibbard-Rodman-Ely Safe Co.,

253 Broadway, New York, N, Y. ’79

Higgins, John Michael 47 Queen St., Melbourne, Victoria, Australia. ’91

fHiLDRETH, Walter E., Min. & Civ. Engr... 115 Broadway, New York, N. Y. ’75 *Hill, Frank A., Genl, Mgr.. .Red Jacket Coal & Coke Co., Roanoke, Va. ’83

'Hill, Robert Thos., Geol U. S. Geol. Survey, Washington, D. C. ’92

*Hill, Rowland F., Jr., Min. Engr 116 Nassau St., New York,N. Y. ’97

Members And Associates.

Walter H., Civ. and Min. Engr., Genl. Mgr., Idaho Little Grant

M. Co., Ltd., Orangeville, Idaho. M)0

Hillard, Charles J., Pres 734 Common St., New Orleans, La. ’88

“Hiller, Ervtard, Miner and Phos. Broker Ocala, Fla. ’95

-Hilles, Joseph T., Coal Alining, Hatfield & Hilles,

1319 Beal Estate Trust Bldg., Philadelphia, Pa. ’92 Hillman, Meredith P. G., Furnace Algr., Sloss Sheffield Steel &

Iron Co., Birmingham, Ala. ’97

*Hills, Victor G., Alin. Engr Cripple Creek, Colo. ’96

Hinchman, Charles S., Agt., Pennsylvania Steel Co-,

902 Provident Bldg., 50 S. 4th St., Philadelphia, Pa. ’79 *Hinman, B. C , Chem. and Alet. Engr., Algr., Gold Extraction and

Bromine Becovery Co., Ltd., 9 Worship St., London, E. C., England. ’96 **Hoar, Frederic W , ., Old Dominion Copper AI. & Sm. Co.,

Globe Ariz. ’02

*Hoatson, John, Min. Engr Bisbee, Ariz. ’91

*Hobson, Francis J., Asst. Mgr., La Castellano Cons. AI., Ltd.,

Apartado 121, Alexico City, Mexico. ’02 Hobson, John B., Min. Engr. and Met, Genl. Mgr., Cons. Cariboo

Hydraulic M. Co., Bullion, B. C., Canada. ’92 Hobson, Bobert, Secy, and Asst. Genl. Mgr., Hamilton Steel &

Iron Co., Hamilton, Ont., Canada. ’99 fHoBSON, Thomas, Phila. Mgr. ...Iron Age, 119 S. 4th St., Philadelphia, Pa. ’92 fHocHSCHiLD, Mauricio, Asst. Mgr., Cia. de Minerales y Metales,

Apartado 733, Mexico City, Mexico. ’01 **Hodge, Arthur Cairn, Min. Engr., Care James Floyd, St. Austell,

Cornwall, England. ’89'

*Hodge, Benjamin 579 Summit Ave., St. Paul, Minn. ’98

*Hodge, James M., Engr. and Geol Big Stone Gap, Ya. ’8S

*Hodges, a. B. W., Genl. Supt., Sm. Dept., Granby Cons. Min and Sm.

and Power Co., Ltd., Grand Forks, B. C , Canada. ’89

*Hodges, a. D., Jr The AVarren, Boxbury, Mass. ’84

*Hodson, Laurence Carl, Min. Engr Ames, Iowa. ’02

Hoefer, Prof, Hans Lcoben, Austria.

Hoffman, John W., Pres, and Engr., Hoffman Engineering and

Contracting Co., Harrison Bldg, Philadelphia, Pa. ’76 *Hoffstot, F. N., Treas , Clinton Iron & Steel Co.,

P. O. Box 177, Pittsburg, Pa. ’82

*Hofius, W. D 72 Dexter Horton Building, Seattle, Wash. ’90

*Hofman, Dr. H. 0., Prof, of Metallurgy, Mass. Institute of Tech.,

Boston, Mass. ’82

Hofmann, Ottokar, Met. Engr., Chem. Director, United Zinc and

Chemical Co. , Argentine, Kansas. ’84

*Hogarty, Barry, Alin. Engr P. 0. Box 691, Pueblo, Colo. ’02

*Holberton, Walter T., Min. Engr., Mgr., Copiap6 Mining Co., Ltd.,

CopiapO, Chili, So. America. ’00 *Holbrook, Charles T., Coal and Coke Operator,

Dekalb Junction, N. Y. ’98

fHoLBROOK, Levi O. Box 536, New York, N. Y. ’78

*Holdbn, Edwin C., Min. Engr., London and British Columbia Gold Fields,

Ltd., P. O. Box 505, Nelson, B. C., Canada. ’97 Care A. F. Holden, Salt Lake City, Utah. ’8t D

*Holden, L. E.

Members Akd Associates.

Holdswobth, Prank A., Engr. and Mgr., Boyal Oak of Hauraki G-. M.

Co., Ltd-, Tokaka, Coromandel, Auckland, New Zealand. ’99 *Holgate, Thomas E., Mgr. (Blast Furnaces, Darwen Works), Darwen &

Mostljn Iron Co , Ltd., Darwen, England. ’92

Holland, L. F. S., Min. Engr Bat Portage, Ont., Canada. ’01

Hollings, Jas- Spencer, Supt., Blast Furnace,

Brymbo, No. Wales, Gt. Britain. ’02

Hollis, H. L., Min. Engr. and Met 440 The Rookery, Chicago, 111. ’85

*Hollis, E. W., Min. Engr Silverton, Colo- ’94

Hollister, Jno. James, Min. Engr., Providence Mine,

Carters, Tuolumne Co., Cal. ’02

Holloway, Harry, Mine Owner 512 4th Ave., S., Great Falls, Mont. ’99

*Holman, F. C. , Eeporting and Developing Mine Property,

Cali, Apartado 1, Colombia, So. America. ’81 *Holmes, Joseph A., N. C. State Geol., Chief Dept. M. & Met., La. P. Ex.,

Exposition Headquarters, Mines Dept., St. Louis, Mo. ’95

*Holt, Marmadrkie B., Min. Engr Silverton, Colo. ’89

*Holt, Taylor, Chemist and Assayer Sombrerete, Zacatecas, Mexico ’02

Homes,. Douglas B Wescott Dorking, Surrey, England. '02

*Honfold, William: L., Consulting Engr., Cons. Mines Selection Co., Ltd.,

P. 0. Box 2269, Johannesburg, Transvaal, So. Africa. ’93 *Hood, Ozni P., Prof, of Mech. and Elect Engineering, Mich. College of

Mines, Houghton, Mich. ’01

Hooker, Brian, Min. Engr S2 Grey St., St. Kilda, Victoria, Australia. ’96

Hooper, Edward, Min. Engr., Salisbury House, London Wall,

London, E. C., England. ’88

*Hooper, G. H 310 Stimson Block, Los Angeles, Cal. ’95

Hooper, William, Supt , Amer. Graphite Co Ticonderoga, N. Y. ’78

Hoover, Herrebt C., Care Bewick, Moreing & Co., 20 Copthal Street,

London, England. ’96

IHoover, Theodore J 320 Sansome St., San Francicco, Cal. ’00

Hope, Theodore M., Mill Supt, Monongahela Furnace Dept, of

National Tube Co., McKeesport, Pa. ’88

*Hopkins, Edward, Min. Engr ‘The Paragon,” Asheville, N. C. ’99

Hopkins, Gerald Voss, Met Chemist, Silica near Bossland, B C , Canada. ’02

*Hopkins, James Francis, Min. Engr 305 Boston Bldg., Denver, Colo. ’02

*Hopper, John G., County Surveyor Sonora, Tuolumne Co., Cal. ’99

Hopping, Herbert 44 St Thomas Road, Finsbury Park, London, Eng. ’93

MTorneb, Geo. W., Min. Engr Mullan, Idaho. ’02

*Hoest, Clarence W. H., Min. Engr., S. Neumann & Co., London,

England, and P. O. Box 485, Johannesburg, Transvaal, So. Africa. ’00

Horwood, E. J Broken Hill Prop. Co., Broken Hill, New South Wales. ’93

Hosking, George F. C., Min. Engr. and Assayer,

Helensville, near Auckland, New Zealand. ’96

Hoskins, William, Chem 81 So. Clark Street, Chicago, 111. ’87

Hoskold, H. D., 1222 Calle Charcas, Buenos Ayres,

Argentine Bep., So. America. ’94 Houston, Edwin J,, Expert in Patent Causes,

' 1203-4 Crozer Bldg., Philadelphia, Pa. ’02

Howald, Ferdinand, Operator and Mine Mgr.,

Bush Bun, Fayette Co., W. Va. ’84

Howard, Charles W., Jr., Supt. andGenl. Mgr., Spence Mineral Co.,

Spenceville, Nevada Co., Cal. ’98

Members And Associates.

Howard, James Hammet, Mine Supt. and Engr., The Bautista Mining

Co., Ameca, Jalisco, Mexico. 02

fHowARD, William C., Mgr., Denver District, Repauno Chemical Co.,

836 Equitable Bldg., Denver, Colo. ’97

*Hov7Ard, William H .Pueblo Sm. and Bel Co., Pueblo, Colo. ’95

*Howe, Albiox S., Min. Engr Boom. 8, Mills Bldg., San Francisco, Cal. ’00

fHowE, Epenetus, Min. Engr P. 0. Box 109, Monterey, Mexico. ’86

*Hove, Frank P., Pres., Musconetcong Iron “Wks., etc.,

Drexel Bldg., Philadelphia, Pa. ’79 *Howe, Henry M., Prof, of Metallurgy... Columbia Univ., New York, N. Y. ’71 Howell, John, Mutual Life Bldg., Martin Place, Sydney, New South Wales. ’93 Hubbard, Lucius L., Genl. Mgr., Champion Cop. Co.,

Painesdale, Houghton Co., jVIich. ’00

Huber, H Mannedorf, Zurich, Switzerland. ’82

*Hudson, Albert W., Metallurgist, 208 Opera House Block, Denver, Colo. ’99 Hughes, a. D., Mgr., New Eiissia Co., 4 Moorgate St.,

London, E. C., England. ’92 fHuGHES, Charles F., Jr., Lawyer... Boom 4, Hughes Blk., Denver, Colo. ’95 *Hughes, Herbert W., Min. Engr., 188 Wolverhampton St,

Dudley, England. ’87

Hughes, Hugh, Genl. Mgr., The Transvaal G. Mg. Estates, Ltd. ,

Pilgrims’ Best, Lydenburg, Transvaal, So. Africa. ’98 "Hulick, Charles Edwin, Supt., Thomas Iron Co. , Island Park, Easton, Pa. ’ 02 fHuLiCK, William H., Vice Pres., Warren Foundry & Machine Co.,

1 60 Broadway, New York, N. Y. ’82

*Hulst, Nelson P., Gen. Min. Engr., Oliver Iron M. Co. and Minnesota

Iron Co., Duluth, Minn. ’76

Humbert, George J., Pres., Steel Iron Aluminum Coating Co.,

Connellsville, Pa. ’88

fHuMEL, Frank J., Delivery Inspector, Amer. Steel & Wire Co.,

950 Clarke Ave., Cleveland, Ohio. ’96

Humphrey, Charles Kotahoenan, North Calebes, Netherlands, India. ’85

Humphrey, George S., Controller and Purchasing Agent, C. W. Hunt Co.,

45 Broadway, New York, N. Y. ’84 **Humphreys, Alexander C., Cons. Engr., Humphreys & Glasgow,

Pres., Buffalo Gas Co., 31 Nassau St., New York, N. Y. ’85

*Hungerpord, William S., Mgr W. Ames & Co., Jersey City, N. J. ’82

Hunicke, H. August 3532 Victor St, St Louis, Mo. ’83

*Hunsiker, Millard, London Agent, Carnegie Steel Co.,

71 King William St., London, E. C., England. ’89

*Hunt, Bertram 717 Taylor St., San Francisco, Cal. ’96

**Hunt, Charles W., Pres., C. W. Hunt Co .45 Broadway, New York, N. Y. ’91 Hunt, Fred. F., Min. Engr., Chera. & Assayer, 77 Pine St, New York, N. Y. ’80

*Hunt, Joshua, Min. Engr. Calle de Hidalgo, 11, Monterey, Mexico. ’02

*Hunt, Egbert W., Cons. Engr 1121 The Kookery, Chicago, 111. ’74

Huntley, Dwight B-, Min. Engr., P. O. Box 41 3, Bulawayo,

Khodesia, So. Africa. ’92

*Huntoon, Louis D., Min. Engr., Care John T. Williams,

27 William St, New York, N. Y. ’97

*Hurlburt, George E., Min. Engr., Mgr Bachelor Mine, Ouray, Colo. ’94

fHuRLEY, Thomas J. , Pres. , Mines Securities Corporation,

Mills Bldg., 35 Wall St, New York, N. Y. ’99

Hi

Members And Associates.

HrTCHiNS; K. Grosve'nor, Jr., Yice-Pres., Jeffrey Mfg. Co.,

Columbus, Ohio. ’00

Hutchixson, E. S., Civ. and Min. Engr Newtown, Pa. ’80

Hutchinsoi, Eakdolph B., Min. Engr. and Met., Genl. Mgr.,

Compania Beneficiadora del Concheno, Concheno, Chihuahua, Mexico. ’91 *Htjtchi]S’'soh, W. Spencer, Min. Engr., Mgr., Boston Get There Zinc Co.,

etc., Carthage, Mo. ’95

Hxjtton, Frederick R., Prof, of Mecli. Engr., Columbia Univ , Secy., A. S.

Mech. E., Columbia Eniv., New York, N. Y. ’75

Hybinette, Victor, Supt Oxford Cop. Co., Bayonne, N. J. ’01

*Hyi>e, Georg-e P., Asst. Supt.. Kansas City Sm. & Ref. Co., El Paso, Texas. ’93

Ihlseng, Axee 0., Min Engr Carthage, Mo. ’82

"Ingalls, IV alter R., Min. Engr. and Met 229 Ocean St., Lynn, Mass. ’91

f I ngham, William A., Pres., Union Improvement & Highland Coal Co.,

etc., 320 Walnut Street, Philadelphia, Pa. ’72 **Ingbak, Arthur E...P. O.Box 1327, Johannesburg, Transvaal, S. Africa. ’94

*InneSj Murray, Chemist Occidental Hotel, San Francisco, Cal. ’95

Ipina, Roberto, Merchant Apartado 30, San Luis Potosf, Mexico. ’9S

*Ibjsh, Dana G., Chemist and Asst. Met-, Care Cia.

Minera de Pefioles, Mapimi, Durango, Mexico. ’OO

*Ibons, Robert H 102 W. State St., Harrisburg, Pa. ’00

Irvine, Fearnsede, Min. and Mech. Engr.,

55-6 BishopsgateSt., Within, London, E. C., England. ’94 *Ibying, John D., Geol...U. S. Geol. Survey, 1330 FSt., Washington, D. 0. ’01

Ibwtn, Frederic, Mine Supt., War Eagle Branch of War Eagle

Cons. M. Co., Murphy, Owyhee Co., Idaho. ’96 Isaacson, William J., Man. Dir., Dayton Coal <fe Iron Co., Ltd.,

213 Johnston Bldg., Cincinnati, Ohio. ’96 IsscHOT, Pierre E. C. Van See Van Isscliot, Pierre, E. C.

*Jabs, Asmus, Dir Lubimoff Solvay & Co., Moscow, Russia. ’88

*Jackling, Daniel C., Mgr U. S. Smelting Co., Cahon City, Colo. ’00

*Jackson, John F., Contracting Engr., Wisconsin Bridge & Iron Co.,

Milwaukee, Wis. ’00

*Jackson, j. Howard, Gen. Mgr., Spur Co.. Lawrence, Otago, New Zealand. ’93

Jackson, T. Moore, Pres, and Chief Engr., West Virginia Short Line

E.R. Co., Clarksburg, W. Va. ’94

Jacobs, Elbridge C., Asst. Prof, of Chem. and Mineralogy, Univ. of

Vermont, Burlington, Vt. ’00

Jacobs, George B., Supt Larkin Mine, Diamond Springs, Cal. ’96

’Jacobus, David S., Prof, of Experimental Mech. and Engineering Physics,

Stevens Inst, of Technology, Hoboken, N. J. ’88 *James, Alfred, Cons. Min. and Met. Engr., 56 New Broad St.,

London, E. C., England. ’94 *James, Arthur Curtis, Metal Merchant.. .99 John St., New York, N. Y. ’02

James, Charles E., Pres., Durham Coal and Coke Co. .Chattanooga, Tenn. ’97 *James, j. H. Cordnbr, Cons. Min. and Met. Engr., Finsbury House,

Bloomfield St, London, E. C., England. ’ 99 *James, Dr. Walter M., Physician and Assayer, 1231 Locust St,

Philadelphia, Pa. ’84

*James, Webster T., V. Pres, and Genl. Mgr., Durham C. C. Co.,

Chattanooga, Tenn. ’01

Members And Associates.

*Jameson, Arthur H., Met Box 476, Providence, E. 1. '02

Jameson, Charles B., Cons. Engr., Railways & Mines ...Tientsin, China. '99

Jamme, George 506 Vine St., Chattanooga, Tenn. '79

Janes, Byron E 2434 Channing Way, Berkeley, Cal. '99

*Janes, Frank W., Chemist and Assayer,

19 Peel St., Collingwood, Melbourne, Australia. '02

*Janeway, John H., Jr., Engr John A. Eoebling’s Sons, Trenton, N. J. '86

*Janin, Henry, Min. Engr., Care of Explor. Co , Ltd., 11 Cornhill,

London, E. C., England. '72

*Janin, Louis Pacific Union Club, San Francisco, Cal. '72

*Janney, Th 03. G., Cons. Engr Centerville, Idaho. '02

Jaques, William H., Engr. and Naval Architect,

186 Devonshire St , Boston, Mass. '90

Jarman, Arthur, Demonstrator in Metallurgy, etc., The University,

Sydney, New So. Wales. '02 Jarrett, John Vandergrift Bldg., Pittsburg, Pa. '96

Jab VIS, Royal B., Chemist, Andes M. Co.,

Apar. 93, Torreon, Coahuila, Mexico. '00

**Jeffrey, Robert H., Min. Engr Oaxaca, Mexico. '96

tJENKiNS, Charles V., Accountant, War Eagle Cons. M. & Dev. Co., Ltd.,

etc., Rossland, B. C., Canada. '01 **Jenkins, Francis, Mgr. Virtue Con. Mines, Silver City, Idaho. '00

Jenkins, Thomas Box 15, Webster, Jackson Co., N. C. '01

Jenks, Arthur W., Supt., Sm. Dept, of Cia. Minera de Penoles,

Mapimi, Durango, Mexico. '87 Jenhs, Thomas H., Mine Supt., Golden Cochtli Tunnel Co.,

Albuquerque, New Mexico. '02

*Jenks, William, V. Pres, and Cons. Engr., Mogollon Gold and

Copper Co., Albuquerque, New Mexico. '87

Jenney, Walter P Knutsford Hotel, Salt Lake City, Utah. '74

Jennings, E. P., Min. Engr 119 Park Place, Oak Park, 111. '76

Jennings, Hennen, IVIin. Engr., Care Wernher, Beit & Co.,

120 Bishopsgate St , Within, London, E. C., England. '84

*Jennings, Robert E Spaulding, Jennings & Co., Jersey City, N. J. '91

**Jennings, Sidney J., Cons. Engr , H. Eckstein & Co.,

P. 0 Box 149, Johannesburg, Transvaal, So, Africa. '94 *Jeppson, George N., Asst. Supt., Norton Emery Wheel Co..Worcester, Mass. ' 01 *Jessop, Herbert J., Met. Chemist New Barnet, Herts, England. '98

Jessup, Alfred E., Chemist Care U. S. Consul, Tientsin, China. '98

*Jesup, Richard M., Mine Owner 124 E. 36th St., New York, N. Y. ’01

Jewett, Eliot C FundicionNo. 2, Monterey, Mexico. '81

*Jirdimston, Wm. C., D. M. Osborne & Co., 3 Woodrufl: Place, Auburn, N. Y. '01 JoBSON, John, Supt., Broken Hill Proprietary Co ..Port Pirie, S. Australia. '96

Johns, J. Henry, Min. Engr., Genl. Mgr., Ferreira G. M. Co., Ltd.,

P. 0. Box 1021, Johannesburg, Transvaal, S. Africa. '94

Johnson, Alex. T., Min. Engr. TepezaH, Aguascalientes, Mexico. '91

Johnson, Charles H., Min. Engr New Castle, Pa. '93

Johnson, Edward M., Chem. and Met., Am. Sm. & Ref. Co., Denver, Colo. '97

Johnson, Edward W Am. Sm. & Ref. Co., Murray, Utah. '93

Johnson, Elias M Cherokee, Lanyon Spelter Co., lola, Kan. '02

Johnson, Guy R., Supt., Blast Furnaces Illinois Steel Co., Joliet, 111. '89

Johnson, Howard S., Elect. Min. Engr., Mgr., Charleston Office,

Jeffrey Mfg. Co., Charleston, W. Va. '00

Membees And Associates.

Johnson, Joseph E., Supl., Blast Furnaces Longdale Iron Co , Longdale,Va. ’80 Johnson, Joseph E., Jr., Asst Mgr. and Engr., Longdale Iron Co.,

Longdale, Va. ’95

Joh:jsSon, Owen, Min. Engr Smuggler Union M. Co., Smuggler, Colo. ’02

Johnson, Ealph I., Min. Engr 3233 2d Ave., S. Minneapolis, Minn. ’02

Johnston, Algernon K., Manfr Prince’s Bay, N. Y. ’99

JoHNSTON, Archibald, Supt Beth. Steel Co., Bethlehem, Pa. ’02

*JoHNSTON, Fred., Chem Apartado 93, Torreon, Mexico. ’00

Johnston, J. Howard, Ciyil and Min. Engr., Care Bacchus & Johnston,

Lima, Peru, S. America. ’87

Johnston, Egbert B., Mine Mgr 30 Victoria Ave , Surbiton, England. ’98

f Johnston, W. J., Pres., Engineering and lining Journal,

261 Broadway, New York, N. Y". ’01

*JoLLY, Alexander W-, Cyanide Mgr. and Engr., Champion Eeef G. M.

Co , Ltd., Champion Eeef, Mysore State, So. India. ’99 "JoNES, B. F Jones & Laughlin’s Works, Pittsburg, Pa. ’78

Jones, Charles C., Min. Engr Mountain Copper Co., Keswick, Cal. ’00

*JoNES, Clemens C., Cons. Engr 908 "West Franklin St., Eichmond, Va. ’86

*JoNES, Edward B., Min. Engr. and Geologist ...Box 1332, Denver, Colo. ’02 *JoNES, Evan E. , Supt, Mex. Coal and Coke Co.,

Las Esperanzas, Coah., Mexico. ’02

Jones, Fayette A., Field Asst., U. S. Geol Survey,

817 North 8th St., Albuquerque, New Mexico. ’98

JoNES, J. Elmer, Supt Mill Creek Coal Co., Hazleton, Pa. ’94

*JoNES, James F., Civ. and Min. Engr.. .214 South 42d St., Philadelphia, Pa. ’88 *.JoNES, L. J. W., Supt. ..Omaha Plant, Amer. Sm. & Eef. Co., Omaha, Neb. ’96

*JoNES, T. Catesby . Bnk. Bldg., Eichmond, Va. ’81

*JoNES, Thomas D., Coal Operator Hazleton, Pa. ’75

*JoNES, W. A. Fleming P. 0. Box 1335, Denver, Colo. ’01

**JoNES, Washington, Mech. Engr 1632 No. 15th St., Philadelphia, Pa. ’81

*JoNES, William L., Genl Mgr Jones Laughlins, Ltd., Pittsburg, Pa. ’88

*JoNES, Wm. S Silver City, N. M. ’01

*JoPLiNG, James E., Min. Engr. .Cleveland Cliffs Iron Co., Ishpeming, Mich. ’84

fJopLiNG, Eeginald P 508 Cuyahoga Bldg., Cleveland, Ohio. ’89

fJosT, Fred Susanville, Grant Co., Cal. ’97

JoijET, Cavalier H., Tutor, Anal. Chem., Columbia Univ..New York, N. Y. ’83 *, Henry A., Min. Engr., Lake View South G. M., etc.,

Kalgoorlie, Western Australia. ’90 *JuDGE, Arthur THEO...De Beers Camp, Mazoc, Mashonaland, So. Africa. ’01 *JuDSON, John N., Min. Engr., Amer. Metal Co., Ltd., etc.,

52 Broadway, New York, N. Y. ’84 JiissEN, Edmund, Min. Engr Spokane, Wash. ’97

Kada, Teichi, Min. Engr 34 Honmura Yotsya, Tokio, Japan. ’88

fEAHN, Julius, Mgr., Combination Euhber & Belting Co.. Bloomfield, N. J. ’97

*Kanda, Eeiji, Chief Engr Hokkaido M. Co., Tokio, Japan. ’93

*Kane, Thomas H., Mgr Hercules Cons. M. Co., Silverton, Colo. ’97

*Kann, Meyer M., Secy, and Treas., Pittsburg Crushed Steel Co., Ltd.,

Sta. B., Pittsburg, Pa. ’95

fEANN, WILLIA3I L., Pres., Penn- Amer. Plate Glass Co.,

600 Westinghouse Bldg., Pittsburg, Pa. ’95 *Karricb:, L. C., Supt Calumet & Hecla Mine, Salt Lake City, Utah. ’86

Members And Associates.

Kasahara, Washitaro, Chief Engr., Hibira Copper Mine,

Higashiusukigarij Hynga, Japan, 90 Kasson, Burt Z., Surveyor and Chemist, Cia. Beneficiadora del Concheno,

Conclieno, Chihuahua, Alexico. ’02 *Kaufmak, Charles, Min. Engr..l0 Austin Friars, London, E. C., England. ’89 *Eawai, Yasushiro, Min. Engr.. ..12 Hinokischio, Akasaka, Tokio, Japan. ’91 **Kayser, H. W. Ferdiistand, Mount Brehoff AI. Co.,

AVaratah, Launceston, Tasmania. ’95

*Kayser, Egbert Lee, Aline Algr Apartado 115, Alonterey, Alexico. ’02

*Keam, Ernest R, Aline Algr., Floater G. AL,

Bavensthorpe, Western Australia. ’01 *Kebler, Julian A., Pres., Colo. Fuel & Iron Co.,

720 Boston Bldg., Denver, Colo. ’85 *KEr)ZiE, George E., Min. Engr Panuco de Coronado, Durango, Alexico. ’88

Keegan, John T., Alin. Engr 2616 AVilliam St., Denver, Colo. ’99

Keeley, Frank J., Alin. Engr. and AIet.,421 Chestnut St.,

Philadelphia, Pa. ’92

Keeley, Jerome 421 Chestnut St., Philadelphia, Pa. ’76

*Keeling, Waverley, Aline Algr Juneau, Alaska. ’02

Keener, George L., Mine Supt., Alary AIcKenney AI. Co.. Anaconda, Colo. ’00 *Keep, William J., Supt., Alichigan Stove Co.,

753 Jefferson Ave., Detroit, Alich. ’88 “Kehler, Charles Baymond, Mine Owner, Box 773, Johannesburg,

So. Africa. ’02

*Kehoe, Henry, Min. Engr., Gooderham Blackstock Syndicate

(of Toronto, Canada), Spokane, Wash. ’00 *Keighley, Fred. C., Genl. Supt., Oliver & Snyder Steel Co.,

Oliver, Fayette Co., Pa. ’88

*Keiller, Alex. G., Supt., Cyanide Plant, P. 0. Box 494,

Virginia City, Nevada. ’02 *Keith, Nathl. S., Cons. Min. & Alet. Engr., 95 Liberty St., New York, N. Y. ’02 *Keller, Arthur H., Mgr., Santa Lucia & Diamanse Mines,

Santa Bosa., Dept, de Copan, Honduras, Central America. ’83

*Keller, Cornelius H., Assayer Apartado 68, Aguascalientes, Mexico. ’99

Keller, Edward, Chem. and Met., Anaconda Cop. M. Co., Care Balt.

Cop. S. & B. Co., 4th Ave. and Clinton St., Canton, Md. ’95

*Keller, Hermann A 620 Hayward Bldg., San Francisco, Cal. ’81

*KELLEy, Walter S., Min. Engr., New Eikhorn M. Co., Ltd.,

Leadville, Colo. ’89

*Kelley, William A., Cyanide Chemist... 2836 Champa St., Denver, Colo. ’02 Kellogg, John S., Jr. , Asst. Supt...Latrobe S. & C. Co., Melrose Park, HI. ’93 *Kelly, Edward, Mgr , Wharton Furnaces and Alines and Genl. Supt. ,

Morris County B.B. Co., Port Oram, N. J. ’90

*Kelly, William, Genl. Mgr Penn Iron M. Co., Vulcan, Mich. ’90

*Kemler, W. H., Chem 1823 Carson Street, Pittsburg, Pa. ’90

*Kemp, James F., Prof, of Geol Columbia Dniv., New York, N. Y. ’91

*Kemp, William, Pres Mut. Nat. Bank of Troy, Troy, N. Y. ’83

*Kempton, C. W., Min. Engr... 29 Broadway, New York, N. Y. ’75

*Kendall, Hugh F., Min. Engr Crete Min. Co., Hibbing, Alinn. ’99

Kennedy, Geo. Adams, Min. Engr Silverton, Colo. ’02

Kennedy, Hugh, Buffalo & Susquehanna Iron Co.,

Erie County Bank Bldg., Buffalo, N. Y. ’81

MEMBERS AlD ASSOCIATES.

JTeeemiah J.j Cons. Engr 52 Broadway, New York, N. Y. 02

*KEKisrEi)Y, JoHJf, Alin. Engr New Wharf, Elobart, Tasmania. ’96

Johk S., Genl. Mgr...Musconetcong Iron Wks., Stanhope, N. J. ’81

KejSTNEDY, dniiiAN, Cons. Mech. Engr Smith Block, Pittsburg, Pa. ’79

*Keyyeby, Oeran W., Genl. Siipt H. C Frick Coke Co., Uniontown, Pa. ’93

*Kent, Joseph C., Blast Furnace Engineer Edgartown, Mass. ’72

*Rb2s-t, Joseph F., Alin. Eng Horr, Alont. ’02

*, AVieliam, Cons. Engr., Engineering Xeivs, 220 Broadway,

New York, K.Y. ’76

**Keyt, AYilliam St. G., Alet 137 Hawthorne Ave., Yonkers, N. Y. ’72

Seri, Br. Brniio Hohenzollernstrasse 2, Steglitz bei Berlin, Germany.

*Keer, David G., Chemist 1102 Centre St., Wilkensburg, Pa. ’86

*, Mark B., Aline Supt, Jumper Gold Synd., Ltd., Stent,

Tuolumne Co., Cal. ’90

fKERR, Thomas B., Patent Lawyer 120 Broadway, New York, N. Y. ’92

Keevin, J. H , Ghem., Smelter, Bingham Copper Gold Co.,

AVest Jordan, Utah. ’95

*Keyes, Charles R., Pres., New Alexico School of Mines,

Socorro, New Alexico.

*Keyes, ay. S., Cons, and Alin. Engr..Pacific Union Club, San Francisco, Cal. *Kidwell, Edgar, Mech. Engr., Room 607, 330 Market St.,

San Francisco, Cal.

*Kimball, Edwin B., Alin. Engr., Boston and Oroville Dredging Co.,

Oroville, Cal.

*K:immell, Harry R., Alin. Engr 318 City Hall, Cleveland, Ohio.

*EIing, Adstin j., Supt Pocahontas Collieries Co., Pocahontas, Ya.

*, Edmund M Leura, Launceston, Tasmania.

*King, Ernest W., Min. Engr Lewistown, Alont.

*King, Thomas AI Irvington-on-Hudson, N. Y.

Kingston, Charles B., Cons. Min. Engr., 4 Hanbury St.,

Kalgoorlie, Western Australia.

*Kinzie, Robert A., Asst. Supt, Alaska Treadwell G. M. Co.,

Treadwell City, Alaska,

*Kirby, Edmund B., Cons. Min. Engr. and Alet., Genl. Mgr., War Eagle and Centre Star Alin. Go’s , Rossland, B. C., Canada. Kirchhopp, Charles, Editor, IronAge.,22 William St., New York, N. Y.

Kirkcaldy, Norman M., Civil and Mm Engr Dunedin, New Zealand.

Kirkegaard, Peter, Genl. Supt , Canadian Gold Fields, Ltd.,

Deloro, Ont., Canada.

Kirkpatkick, Guy H., Min. Engr.,

Care Leroy Kirkpatrick, 215 Simcoe St, Toronto’ Canada, *Kleinschmidt, Charles, Mech. Engr., Calle Berlin, No. 5,

Mexico City, Mexico.

Klepetko, Prank, Min. Engr 1011 AXartine Bldg., New York, N. Y.

*Klug, George C., Metallurgist, Golden Horseshoe Mine,

Boulder, Western Australia. Knapp, George F., Oglehay, Norton & Go., Wade Bldg , Cleveland, Ohio.

*Knapp, Isaac N p. Q. Box 1564, Philadelphia, Pa.

f Knapp, S. A., Supt Pacific Copper Co., Hawthorne, Nevada.

Knecht, Carl E., Sampler, Crown Reef G, M. Co.,

Box 1081 , Johannesburg, S. Africa. Knight, Edward C., Mgr., Am. Smelting and Ref. Co.,

Apartado 101, Monterey, Mexico.

’99

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MEMBERS A2nI) ASSOCIATES.

Knight, Fletcher H., Asst. Genl. Supt., Thomas Iron Co.,

Hokendauqua, Pa. ’90

-Knight, Wilbitb C., Prof, of Min. and Geol., School of Mines,

Univ. of Wyoming, 914 Grand Ave., Laramie, 'Wyo. ’00

Knoertzee, Henri, Min. Engr 56 Eue Balagny, Paris, France. ’92

*Knox, Henry H., Cons. Min. Engr 99 John St., kew York, Y. Y. ’92

*Knox, Newton B., Min. Engr.. .Room 36, 310 Pine St., San Francisco, Cal. ’00 *Knox, MTlliam, Mine Owner, 163 William St.,

Melbourne, Victoria, Australia. ’01

Knutzen, Theodor, Supt National Sm. Co., Rapid City, So. Dakota, ’90

*Koch, Walter E., Min. and Met. Engr,, Genl. Mgr., Lustre M. Co.,

Sta. Maria del Oro (via Parral), Durango, Mexico. ’86 *Kochkine, Simeon J., Engr. of Mines and Metallurgy,

Rostow-on-Don, S. Russia. ’02 Koehler, William, Elec. Chem. Engr., 1614 Superior St., Cleveland, Ohio. ’01

Koelle, Carl 71 Broadway, New York. N. Y. ’96

Koenig, Prop. George A Michigan College of j\Iines, Houghton, Mich. ’74

*Kondo, R., IMin. Engr..l Y'ayesucho, Itchome Itreymachuku, Tokio, Japan. ’88

**E:ow, Tong Sing, Cons. Engr Pekin Syndicate, Shanghai, China. ’90

*Kbabler, Emil, General Director, Ivolner Bergwere-verein,

Altenessen, Germany. ’91

*Kraemer, Edward L., Chem 1409 So. 8th St., Denver, Colo. ’98

*E:eebs, Charles E., Civ. and Min. Engr. Kanawha Falls, W. Va. ’02

*Keebs, George J., Min. Engr Somerset Trust Co., Somerset, Pa. ’01

Krejci, Milo W., Smelter Foreman, Boston & Montana Cons. Cop. &

Silver Mining Co., Great Falls, Mont. ’98

-Krull, Oliver W., Min. Engr 1526 Charlotte St., Kansas City, Mo. ’00

*Kdnhardt, Wheaton B., 2d V. Pre.s., Carpenter Steel Co,,

1 Broadway, New York, N. Y. ’80 fKxTNZ, George F. , Gem Expert, Tiffany & Co., 11 Union Square,

New York, N.Y. ’88

Kurie, Frank M , Min. Engr Portland G. M. Co., Victor, Colo. ’97

*, Edward L Columbia Univ., New York, N. Y. ’94

*, Henry M., Supt. of Mines... Harbison, Walker Co., Pittsburg, Pa. ’93 **Kwang, Kwong Yung, Chinese Engineering & M. Co ,

Linsi Colliery, Tientsin, China. ’94

*Ladd, George E., Prof, of Geol. and Min., Dir., Missouri School of Mines,

Rolla, Mo. ’98

*Laidlaw, James T., Min. Engr., Mgr., Kootenay Gold Mines, Ltd.

(Perry Creek), Fort Steele, B. C., Canada, ’00 *Laird, Geo. A La Victoria y Anexas, San Luis Potosi, Mexico. ’01

*Lakenan, Cornelius B., Min. & Mech. Engr Grass Valley, Cal. ’00

*Lak;es, Arthur, Western Editor, Mines and Minerals,

32 Barth Blk., Denver, Colo. ’96 fLAMB, Charles R. F. H Address wanted. ’98

*Lamb, Mark B., Min. Engr 425 Temple St., Los Angeles, Cal. ’01

*Lam:b, Richard, Civ. and Min. Engr 1 Broadway, New York, N.Y. ’02

*Lamson, Allan G., Cons. Engr... McCormick Bldg., Salt Lake City, Utah. ’96

**Landero, Carlos F. De, Min. Engr., Geol., Genl. Mgr., Real del Monte

M, Co., Las Cajus, Pachuca, Mexico. ’94

**Landfield, Jerome B 2243 College Ave., Berkeley, Cal. ’02

Landis, Edward K. , Asst. Furnace Mgr, , 4025 Spruce St., Phi ladelphia, Pa. ’82

Members And Associates.

Laje, He:?nRY M., Principal, Mechanical Dept., International

Correspondence School, Scranton, Pa. ’99

*Laye, X S., Aleck Engr 620 Connell Bldg., Scranton, Pa. ’80

'Langdon, X. M., Algr Antrim Iron Co., Alancelona, Mich. ’81

*Langdon, Paul D., Pres., Augusta Tel. & Electric Co.,

504 Djer Bldg., Augusta, Ga. ’87 fLANGELOTH, X, Pres., Amer. Aletal Co., Ltd., 52 Broadway,

P. O. Box 957, New York, X. Y. ’90

*Langeoei>, Frane: Alelones Alining Co., Alelones, Cal. ’98

Langtox, .Johx, Cons. Engr 99 John St., Xew York, X. Y. ’01

*Laxeing, John G,, Supt., Open Hearth Dept., U. S. W. Co.,

Xewberry Steel AVorks, Cleveland, Ohio. ’93-

’"Labsson, Per, Genl. Mgr Xora Cons. Alines, Striberg, Sweden. ’86

*La Rue, AV. G., Mining Xorth Freedom, AVis. ’88

*Lash, Horace W., Vice-Pres. and Aletl. Engr., Garrett, Cromwell Eng.

Co., Xew England Bldg., Cleveland, Ohio. ’88 *Lasley, AVilliam Al, Vice-Pres., Southern Paving & Construction Co.,

Chattanooga, Tenn. ’00

*Lathrop, Martin A., Alet. and Assayer. Los Gatos, Cal. ’89

*Lathrop, AVilliam A No. Amer. Bldg., Philadelphia, Pa. ’83

*Lauder, George, Mgr., Carnegie Bros. Coke AVks.,

7403 Penna. Ave., Pittsburg, Pa. ’78

‘Lauder, AA'illiam, Mgr Colonial Iron Co., Eiddlesburg, Pa. ’02

*Laulig, 0. O., Supt., Blast Furnaces, Illinois Steel Co., So. AVorks,

So. Chicago, 111. ’93

*Laughlin, James B., Furnace Supt,..Laughlin & Co., Ltd., Pittsburg, Pa. ’97

Laubeau, L. G., Cons. Engr 11 Waverly Place, Xew York, X. Y. ’78

*Lavagnino, G., Min. Engr P. O. Box 550, Salt Lake City, Utah. ’85

*Law, John B,, Supt. of Mines Penna. Coal Co., Pittston, Pa. ’91

Latvall, Elmer H., Alin. Engr., Treas. Internat. Text-Book Co ,

Scranton, Pa. ’98

Lawn, James G. , Prof, of Mining, S. African School of Alines,

Kimberley, S. Africa. ’97

Lawrence, Benjamin B., Min. Engr 56 Wall St., Xew York, X. Y. ’82

Lawrence, Charles E., Supt- of Mines Amasa, Iron Co., Mich. ’93

Lawrence, H, L 19 Walpole Terrace, Brighton, England. ’90

*Lawrence, Schuyler, Mgr., Barranca Copper Co.,

Barranca del Cobre, Chihuahua, Mexico. ’99

Lawrence, Walter L., Alin. Engr 719 Delaware St , Scranton, Pa. ’83

Lawson, James C. E., Alin. Engr., Finchley Lodge, Xorth Finchley,

London, England. ’01

Lawson, Thomas AV., Min. Engr., Ricketts & Banks,

104 John St., Xew York, X. Y. ’99'

*Lay, Henry C., Civil and Alin. Engr Box 206, Telluride, Colo. ’89

*Leacey, Fred. J., Asst. Manager, Fdy. Dept., Amer. Grass Twine Co.,

St. Paul, Minn. ’98

ILeary, Daniel J., Contracting Engr 119 E. 25th St, Xew York, X. Y. ’81

Leavitt, E. D., Mech. Engr 2 Central Square, Cambridgeport, Mass. ’76

’Le Boutillier, Clement, Chem. and Met, Taylor Iron & Steel Co.,

High Bridge, N. X ’91

*Leckie, Robert G Truro, Xova Scotia. ’7D

*Leckie, R. G. E., Min. Engr., Genl. Mgr., Republic Cons. G. M. Co.,

Republic, AVash. ’91

Membees And Associates.

*Ledotjx, Albeet R., Cons. Engr. and Assayer, Ledoux & Co.,

99 John St., New York, N. Y. ’89

**Ledoxjx, Feederic A.j Min. Engr., Societe Miniere et Metallnrgique

de Penarroya, 12 Place Vendome, Paris, France. ’97 *Lee, Arthur H , Supt., Blast Furnaces, Lackawanna Steel Co.,

Buffalo, N.Y. ’87

fLEE, Harry H., Attorney 621 Ernest & Cranmer Bldg., Denver, Colo. ’99

*Lee, J. Hexry, Pres. , Great Elk Coal Co., Carbon Hill, Ala. ,

and 33 South Gay Street, Baltimore, Md. ’90 Lee, Richard Henry, Jr., Genl. Supt., Colorado Fuel & Iron Co.,

Pueblo, Colo, ’83

*Leete, William McN., Mn. Engr 1225 Webster St., Oakland, Cal. ’91

Fevre, Henry F., Min. Engr 54 Broad St., New York, N. Y. ’93

Fevre, Solomon, Asst. Mgr., Chateaugay Ore & Iron Co.,

Plattsburgh, N. Y. ’93

Leffinowell, W'illiam H., Civil and Min. Engr Lake City, Colo. ’01

*Leggat, Alexander, Min. Engr P. O. Box 115, Butte, Mont. ’02

*Leggat, J. Benton, Min. Engr 517 Hennessy Bldg, Butte, Mont. ’95

**Leggett, Thomas H., Cons. Min. Engr.,

Salisbury House, London Wall, London, E. C., England. ’82

*Lehman, George M,, TJ. S. Asst. Engr 411 P. 0. Bldg., Pittsburg, Pa. ’86

Lehmann, Gustavus W., Chem 412 E. Lombard St.,’ Baltimore, Md. ’91

*Lehmer, Frank W., Asst. Engr., N. C. & C. Co.,

1170 Sherman Ave., Denver, Colo. ’02 ILeighton, George B., Vice-Pres., Kansas & Texas Coal Co., St. Louis, Mo. ’99

Leiseneing, Walter, Genl. Supt Westmoreland Coal Co., Irwin, Pa. ’91

*Le Moyne, Joel H., Mine Supt 1465 Josephine St., Denver, Colo. ’00

Lempbiebe,’ Oscar, J 506 Little Collins St., Melbourne, Australia. ’01

*Lengemann, Aug., Prof, and Geheimer Bergrath, 38 Thurmstrasse,

Aachen, Germany. ’ 02

*Lengle, E. Fleming, Mgr., Republic M. Co.,

Santiago, Papasquiaro, Durango, Mexico. ’01 *Lengle, Edward M., Asst. Mgr., Republic Mining Co.,

Santiago, Papasquiaro, Durango, Mexico. ’02 *Lennig, Nicholas, . Chem., Charles Lennig& Co., Ltd.,

333 Drexel Bldg., Philadelphia, Pa. ’82

*Lentz, WiLLLiivi 0., Genl. Mgr Lentz & Co., Park Place, Pa. ’85

Leonard, R. W., Min. Engr., Lake Superior Power Co.,

Sault Ste. Marie, Ont, Canada. ’94 Leonard, William A., Genl. Supt., Steel Wks. & Mill,

Tremont Nail Co., West Wareham, Mass. ’89 *Lerchen, Frank H., Min. Engr. and Metallurgist,

Modoc, Dona Ana Co., New Mexico. ’96

Lesley, Prof* J. P Room 10, 3d Floor, 506 Walnut Street, Philadelphia, Pa,

*Leslib, Hugh M., Chem. Engr., Cyanide Process, Kolarg. Field,

Marikuppam, Mysore, So. India. ’97

*Letts, Robert F., Min. Engr 334 Union, Lima, Peru, So. America. ’01

**Levat, David, Min. Engr 174 Boulevard Malesherhes, Paris, France. ’87

*Lbvings, Joseph H., Chief Assayer and Chem., Tasmania Sm. Co.,

Zeehan, Tasmania. ’97

*Le Wald, E. A., Civil & Min. Engr Bond & La Farge, Seattle, Wash. ’87

fLEWis, Albert Bear Creek, Luzerne Co., Pa. ’91

Members And Associates.

**LYMA.sr, BE5JAMii5' S., Min. Engr 708 Locust St., Philadelphia, Pa.

I fLYMAX, Feaxk, Treas., Low Moor Iron Co. of Yirginia,

Tontine Bldg., 88 Wall St., New York, N. Y.

Lyman, Egbert, Jr., Min. Engr Butler, Nevada.

*Lyman, Robert H., Spanish- American Iron Co., etc.,

Santiago de Cuba, Cuba

*Lyon, Charles G., National Mutual Bldg., Collins St.,

Melbourne, Victoria, Australia.

Lyon, Dorsey a Address wanted.

tLYSLE, Walter Scott, Metallurgical Engr.,

354 West 120th St., New York, N. Y.

McArthur, Robert A., Min. Engr.,

Parrott Silver & Cop. Co., Butte, Mont.

*McCaffery, Richard S., Min. Engr 120 Broadway, New York, N. Y.

*McCalley, Herry, Chem University, Ala.

IMcCallum, a. Campbell, Min. Engr P. O. Victoria, B. C., Canada.

IMcCallum, William H., Mech. Engr. ..925 Chestnut St , Philadelphia, Pa.

*McCahdless, E. V., Accountant P. O. Box 1096, Pittsburg, Pa.

*McCaith, Ferdihahd, Min. Engr Cadereyta, Queretaro, Mexico.

McCarthy, Edward E., Min. Engr 43 Irving St., Cambridge, Mass.

*McCarthy, Edward T., Gen. Mgr., Matheson & Co,,

3 Lombard St , London, England.

*McCarthy, M. E., Min. Engr 1025 South 19th St, Birmingham, Ala.

*McCartrey, Robert J., Mill Supt Silverton, Colo.

*McCarty, Geo. J., Mine Mgr Torres, Sonora, Mexico.

*McCay, Dr. Le Roy W., Prof, of General Chemistry, Princeton Univ.,

Princeton, N. J.

*McChrystal, j. C P. O. Box ‘‘FV Eureka, Utah.

*McClellar, Arthur Drifton, Luzerne Co., Pa.

McClintock, William H., Mine Operator Sonora, Cal.

McClure, David, Mine Supt Gwinmine, Calaveras Co., Cal.

*McClure, Samuel, Genl. Mgr., Stewart Iron Co., Ltd.,

Sharon, Mercer Co , Pa.

*McCluro, Tames A., Min. Engr 938 Equitable Bldg., Denver, Colo.

*McComas, William P., Mine Supt Beverly, Sierra Co., Cal.

McCoyrell, John, Nova Scotia Steel Co., 3604 Powelton Ave.,

Philadelphia, Pa.

McConnell, Nevin Union Steel Co., Donora, Pa.

*McCoed, William H Sandy, Nevada.

McCormack, G. B., V. Pres Woodward Iron Co., Woodward, Ala.

*McCormick, Edward, Min. Engr 1564HeclaSt, Calumet, Mich.

McCormick, Henry, Jr , Central Iron Steel Co., Harrisburg, Pa.

McCoemick, Vance C., Secy, and Treas., Sonman Shaft Coal Co.,

Harrisburg, Pa,

*McCoy, James W., Cons. Min. Engr., Montana Cop. & G. M. Co.,

125 La Salle St., Chicago, 111.

*McOeeath, Andrew S., Chem 223 Market St., Harrisburg, Pa.

*McCreath, Lesley, Chemist 223 Market St., Harrisburg, Pa.

*McCbee, Parbinuton M., Mine Supt Box 1027, Salt Lake City, Utah.

McCbery, Charles, Genl. Supt., Dominion Iron & Steel Co., Ltd.,

Sydney, Cape Breton, Nova Scotia.

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MEMBEES AlSri) ASSOCIATES.

*McCulloch, Eichard, Asst. Gen. Mgr., Chicago City Ey. Co.,

2020 State St., Chicago, 111. ’91 McCullough, Edmund H., Pres., Westmoreland Coal Co.,

224 So. 3d St., Philadelphia, Pa. ’01

*McCurdy, John E Apartado 2217, Mexico City, Mexico. ’97

McDaniel, Alex. K., Min. Engr 107 So. Excelsior St, Butte, Mont. ’02

*McDermott, Walter, Min. and Met. Engr.,

43 Threadneedle St., London, E. C., England. ’74 McDonald, Jno. A., Care McDonald, Searles & Co ,

4 Chapel St., Cripplegate, London, E. C., England. ’01 McDonald, Joseph A., , Ohio Wks., National Steel Co.,

Youngstown, Ohio. ’00

McDonald, Samuel, vSupt., Bessemer Dept, Eepublic Iron & Steel Co.,

Youngstown, Ohio. ’85

McDonald, Thomas, Genl. Supt National Steel Co., Youngstown, Ohio. ’90

*McDowell, J. C 812 Frick Bldg., Pittsburg, Pa. ’94

*McGary, E. L., Consulting Engr., Eooms 1214—17, Westinghouse Bldg.,

Pittsburg, Pa. ’94

*McGee, George T., Min. Engr Anaconda M. Co., Butte, Mont. ’99

*McGrath, John, Mine Mgr Apartado 22, Oaxaca, Mexico. ’02

*McGregor, J. Murray, M. E. and Provincial Land Surveyor,

Slocan, B. C , Canada. ’01

*McHose, Arthur Boone Clay Works, Boone, Iowa. ’99

McIlvain, Edward M., Pres... Bethlehem Steel Co., South Bethlehem, Pa. ’86 fMciLVAiN, J. Gibson, Lumber Merchant,

58th St. and Woodland Ave., Philadelphia, Pa. ’01 *McTlvain, William E., Pres., Eeading Gas. Co.,

210 North 5th St, Eeading, Pa. ’92 *McKay, John E., Mining Accountant, Lake View Consols, Ltd.,

Boulder, Western Australia. ’94

*McKee, Jas. A., Supt. Mach. Dept, Cia. Fundidora de Fierro y Acero,

Monterey, N. L , Mexico. ’02

*McKee, John F., Mine Supt Baker Mines, Carroll Co., Va. ’92

*McKenna, Alexander G., Met., Chemist, Firth Sterling Steel Co ,

Demmler, Pa. ’96

*McKenna, Charles F., Chem.Engr 221 Pearl St, New York, N. Y. ’94

*McKeown, W. W., Chem 829 Wick Ave., Youngstown, Ohio. ’00

**McKillop, John, Met. Engr.,

3 Clements Inn, Strand, London, W. C., England. ’93

*McKinley, Wm. B., Min. Engr 108 W. 79th St., New York, N. Y. ’02

fMcKiNNEY, E. C 136 Liberty St, New York, N. Y. ’86

*McLanahan, j. King, Iron Mfr. and Miner. Hollidaysburg, Pa. ’81

*McLean, Gordon, Min. Engr Morenci, Ariz. ’99

*McLean, John H., Supt Oliver Iron M. Co., Ironwood, Micb. ’00

*McLeavy, John, Mine Mgr John McLeavy & Co., Punxsutawney, Pa. ’75

*McLennan, j. S Dominion Coal Co., Ltd., 95 Milk St., Boston, Mass. ’85

*McLure, Charles D. , Min. Engr 608 Security Bldg., St Louis, Mo. ’88

McMahan, Charles H., Genl. ., Sombrerete M. Co.,

Sombrerete, Zacatecas, Mexico. ’95

*McMurray, Max, Genl. Supt, Newburg Wks., American Steel & Wire Co.,

Cleveland, Ohio. ’02

*McNamara, Herbert H 316 Torrey Bldg., Duluth, Minn. ’02

Membbes And Associates.

*McNaugher, Dayid W., Civil Engr., Robert W. Hunt & Co.,

Monongahela Bank Bldg., Pittsburg, Pa. 96

*McR"xjlty, Samuel G Superior C. S. & H. R. R., Calf Creek, Ky. ’02

*McVichie, D., Supt of Mines, Be la Mars Mercur Mine Co., Mercur, Utab, ’91

*MAcAiiTHrB, John S., Met 45 Renfield St., Glasgow. Scotland. ’92

Maccallum, ]Sr. G., Supt., Steel Plant, Phoenix Iron Co , Phoenixville, Pa. ’02

’Macco, HEiNBrcH, Civil and Met Engr Siegen, Germany. ’92

MacCulloch, Charles, Min. Engr., Fir Grove,

Gladstone Road, Auckland, jN’ew Zealand. ’98

MacDonald, Bernard P. O. Drawer 1747, Spokane, Wash. ’89

Macdonald, Charles, Civil Engr. 2 Wall Street, New York, N. Y, ’75

MacDonald, Jesse J., Min. Engr., Care Inca Min. Co.,

Tirapata, Peru, So. America. ’00 Macdonald, Joseph, Mine Mgr., Alaska Treadwell S. M. Co.,

Douglas Island, Alaska. ’96

*1acDonald, Michael E., Mine Manager,

P. O. Box 33, Guanajuato, Mexico. ’02 *MacDonald, William T., Min. Engr., 128 No. Main St., Los Angeles, Cal. ’01 MacFablane, George, Min. Engr., Les Compagnie Franaise de Mines

d’Or et d’ Exploration, 20 Rue Taitbout, Paris, France. ’98

*Maceablane, Graham, Pres 3d & Main Sts, Louisville, Ky. ’86

*MacPablane, Rienzo W , Care Dupp Syndicate,

Singapore, Malay Peninsula. ’02

Macfarlane, Thomas, Chief Analyst, Inland Revenue Laboratory,

317 Queen St., Ottawa, Canada. ’89

*Macgeorge, Alexander J., Min. Engr.,

P. 0. Box 240, Kalgoorlie, Western Australia. ’97 *Mace:, Thomas A , Mgr , Furnace and Mine,

508 Neave Bldg., Cincinnati, Ohio. ’88

*Mack:ay, Angus, Min. Engr. and Met Douglas City, Alaska. ’87

Mackay, Angus R., Chem Royal Bldg , Montreal, Canada. ’96

*Mackay, Philip A., Care Sulphide Corp. Co. of London & Australia,

Cockle Creek, New So. Wales, Australia. ’99

*Mackay, Walter, Mining 320 Montgomery St., Portland, Ore. ’87

Mackenzie, G. S., Met., Sydney Sm. Co Woolwich, New South Wales. ’87

Mackenzie, Louis, Mech. Engr., Riverside Dept., National Tube Co.,

Wheeling, W.Va. ’96

*Mackey, Perry D., Republic Iron & Steel Co Youngstown. Ohio, ’94

MacKinnon, G. W. W., 2 East India Ave., Leadenhall St,

London, E. C., England. ’93 *MacLeod, Wm. Alex., Director, School of Mines,

Charters Towers, Queensland, Australia. ’01 *MacLeod, William A , Min. Engr., P. O. Box 222, Sudbury, Ont , Canada. ’99 *MacNaughton, James, Pres. & Treas., MacIntyre I. Co.,

26 Cortlandt St., New York, N. Y. ’93 MacNaughton, James, Min. Engr., Genl. Mgr., Calumet & Hecla Mines,

Calumet, Mich. ’90

**MacNeill, Charles M., Vice-Pres and Genl. Mgr., IT. S. Reduction <fe

Ref. Co., etc., Colorado Springs, Colo. ’09 Macnutt, Charles H., Min, Engr., Cia. Huanchaca de Bolivia,

Pulacayo, Bolivia, So. America. ’90 Macomb, John de N., Jb., Civil Engr., 1417 Kentucky St, Lawrence, Kas. ’00

Members And Associates.

' MacPherean, EaIiPh S. , Cliem AUis-CIialmers Co., Milwaukee, Wis. 97

MACiENAr, AVm., Supt Catherine Lead Co., Fredericktown, Mo. ’02

*Magruder, William T., Prof. Mech. Engr., Ohio State Univ ,

Columbus, Ohio. ’88

-Mahony, Arthue S. J 51 W. 94th St., New York, N. Y. ’88

*Main, Alfred F., Asst Genl Algr., El Oro M. & Ey Co., Ltd.,

El Oro, Mexico, Mexico. ’02

"Maixwaeexg, Hugh M. C., Min. Surveyor, Care Chillagoe Ey. & Mines,

Ltd., Chillagoe, Queensland, Australia. ’99 Maitland, Oeoege C., Min. Engr.,

Brookman St., Kalgoorlie, Western Australia, ’00 Makita, Tamaki, Min. Mgr., Care Mitsui Miike Coal Mines,

Chikugo, Japan. ’00

Malcolmson, James A¥.. Cons. Min. Engr., P. O. Box 327, El Paso, Texas. ’90 *Malins, Feancis a., Min. Engr...P. O. Box 296, Silver City, New Mexico. ’97 *Malm, J. Laweehce, Genl. Mgr., Electro-Chemical Ore Eeduction Co.,

Marysville, Mont. ’96

’Manley, Frank Austin, Chief Eng., Union Pacific Coal Co.,

P. O. Box 165, Eock Springs, Wyo. ’02 Manley, Henry L., Min. Engr., Crows’ Nest Pass. C. Co.,

Fernie, B. C., Canada. ’93

'"Mann, James S., Assayer and Chem., Univ. of Arizona... Tucson, Arizona. ’02

Mann, William S Thayer M. & M. Co., hliramar, Costa Eica, C. A. ’01

Mannesmann, Egbert Eemscheid, Germany. ’90

Mannheim, Ernest A., Min. Engr., Care Howells Explor. Co.,

Gundagai, New South Wales. ’01 Mannheim, H. C., Chemist, Min. Engr., 76 Warren St., New York, N. Y. ’89 *Mannheim, P. a. L., Met., and Asst. Supt, Am. S. E. Co.,

Monterey, Mexico. ’89

Mansfield, Nathan T Address wanted. ’96

*Manson, William 0., Mining Equitable Bldg., Denver, Colo. ’02

Marais, Emile M. C. Du, Min. Engr.,

6 Quai de I’Amerante, St. Petersburg, Eussia. ’96

*Markle, Alvan, Coal Mine Operator Hazleton, Pa. ’85

*Marble, John, Min. Engr G. B. Markle & Co., Jeddo, Pa. ’79

Marriner, Jno. T., Engr., East Murchison United G. M.,

Lawlers, East Murchison, W. Australia. ’01 *Martin, Dr. a. a., Min. Engr...Unter den Linden 8, Berlin, W. Germany. ’00 **Martin, Edward P., Civil Engr., Genl. Director of Guest Keen Co , Ltd.,

Dowlais, Glamorganshire, Wales. ’81 *Martin, j. B., Supt., Bessemer Steel Dept., Penn. Steel Co ,

Box 42, Steelton, Pa. ’86

Martin, J. F Phoenix Foundry, Gawler, S. Australia. ’93

Martin, Nicholas J., Supt. of Mines, N. Y. & Honduras Eosario M. Co.,

San Juancito, Honduras, Central America. ’00 Martin, Simon S., Supt, Steel Dept, Maryland Steel Co.,

612 C St, Sparrows Point, Md. ’99 Martinez, Adolfo, Cia. MetallurgicaMexicana...San Luis Potosi, Mexico. ’02

*Mason, Bussell T., Min. Engr Care E. C. Mason, Boulder, Colo. ’93

*Massenez, Joseph, Engr 10 Humboldtstrasse, Wiesbaden, Germany. ’91

Masters, Harris K., Smelter Supt,

CareU. S. Min. Co., Salt Lake City, Utah. ’95 E

Members And Associates.

Matcham, Charles A., Genl. Mgr., Lehigh Portland Cement Co..

Allentown, Pa. ’97

*Matheb, Henry A., Secy., Verde Queen Cop. Co. of Arizona, etc.,

41 Cortlandt St., Hew York, N. Y. ’00

Mather, Samuel Hichards, Mather & Co., Cleveland, Ohio. ’/9

IMather, William G., Pres Cleveland Cliff Iron Co., Cleveland, Ohio. ’86

Matheson, William G., Mgr., I. Matheson & Co , Ltd.,

Hew Glasgow, Nova Scotia. ’85

niATHEWS, Edward J *71 Broadway, New York, N. Y. ’97

’'Mathewson, E. P., Met Anaconda Copper M. Co., Anaconda, Mont. ’89

*Mattern, Herman, Min. Mgr Hornbrook, Cal. ’02

Mattes, Charles C., Min. Engr 615 Lackawanna A ve., Scranton, Pa, ’81

Mattes, William F., Cons. Engr Connell Bldg., Scranton, Pa. ’81

Matthiessen, F. W Matthiessen & Hegeler Zinc Co., La Salle, 111. ’84

Mauney, a. C., Cashier Whitney Reduction Co., Gold Hill, N. C. ’94

’Maurice Joseph, Min, Engr., Monte Horcaz’s Domain, por Villanueva-

Minas, Province of Seville, Spain. ’90

Maurice, Juan, Min. Engr Potosi, Bolivia, So. America. ’00

*Maxson, Chester W,, Supt M. M. M.Co., Ltd., Lordsburg, N. Mex. ’02

*Maxwell, Jno. W. C., Min. Engr 820 Sansome St., San Francisco, Cal. ’02 *May, Albert Edward, Reduction Office, Care Latham G. M. Co., Ltd.,

Caethe-Minas Geraes, via Bio de Janeiro, Brazil, So. ilmerica. ’02

*May, De Courcy, Genl. Mgr N. Y, Shipbuilding Co., Camden, N. J. ’79

''’May, Jesse J., Mine Mgr Alma G. M. Co., Idaho Springs, Colo. ’01

Maynard, George W., Min. and Metl. Engr., 20 Nassau St., NewYork, N.Y. ’71

Maynard, Rea E., Civil Engr P. 0 Box 721, Honolulu, Hawaii. ’94

Mayo, James H., Coal Operator... Paramaribo, Dutch Guiana, So. America. ’82 Meaker, W. L\throp, Chemist, Spanish- Amer. Iron Co.,

Daiquiri, Santiago de Cuba, Cuba. ’00 *Means, Ellison C., Pres, and Gen. Mgr., Low Moor Iron Co. of Va.,

Low Moor, Va. ’88

*Means, John H., Min. Engr., Care Bewick, Moreing & Co.,

20 Copthall Ave , London, E. C , England. ’97 Meeker, David M., Foundry Supt., Care S J. Meeker,

95 Clay St, Newark, N. J. ’91

*Meeks, Reginald, Metallurgical Engr., Griffin Wheel Co Chicago, 111. ’02

*Megraw, Herbert A., Met., Guanajuato Cons. M. M. Co.,

Apartado S3, Guanajuato, Mexico. ’01 Meier, Edward D., Pres, and Chief Engr., Heine Safety Boiler Co,,

11 Broadway, New*’ York, N. Y. ’86 Mein, William W., Mgr., Durban Roodeport Deep, Ltd ,

Box 110, Roodeport, Transvaal, So. Africa, ’00 Meissner, Carl A., Min. Engr., Dominion I. &S. Co., Sydney, C. B.,

Nova Scotia. ’00

Meistee, Herman 0 2930 Geyer Ave., St. Louis, Mo. ’77

*Mblla, Fritz Keystone, S. Dakota. ’01

Mblliss, D. Ernest, Cons. Min. and Civ- Engr., 208 California St.,

San Francisco, Cal. ’00

'Melter, Gustav E., Min. Engr. and Met Bourne, Baker Co,, Oregon. ’00

‘Merger, John W., Genl. Mgr., So. American Development Co.,

P. 0. Box 336, Guayaquil, Ecuador, and 16 Broad St., New York, N. Y. ’97 Merger, William A., Min. Engr., Bloomfield House, 85 London Wall,

London, E. C., England. ’92

Members And Associates.

*Meectje, Eobeet S., Div. Supt Lehigh Yalley Coal Co., Centralia, Pa. ’00

*Meeeice:s, Feank, Min. Engr., 5 Great Winchester St.,

London, E. C., England. ’92

Meeeill, Chaeles W., Met Homestake M. Co., Lead, So. Dak. ’92

*Meeeill, Edwaed P., Genl, Supt U. S. Coal Oil Co., Logan, W. Va. ’01

*Meeeill, Feedeeice: J. H., State Geologist, New York State Museum,

Albany, N.Y. ’85

*Meeey, Hexey G , Genl. Mgr Montana Coal & Coke Co., Horr, Mont. ’89

IMeeeyweathee, Geoege, Genl. Western Agt., Coxe Bros. Co., Inc.,

601 The Eookery, Chicago, 111. ’80 *Messitee, Edwin H , Supt. of Construction, Care Federal Lead Co.,

705 Olive St, St Louis, Mo. ’01 *Messlee, Eugene L., Genl. Supt, Blast Furnace & Coke Wks.,

Jones & McLaughlin, Ltd., Pittsburg. Pa. ’97 Metcalf, Alfeed T., Genl. Mgr., United Eeefs (Sheba), Ltd.,

Eureka, Transvaal, S. Africa. ’91

*Metcalf, Oelando, Treas Verona Tool Works, Pittsburg, Pa. ’79

Metcalf, William 1 Fulton St, Pittsburg, Pa. ’94

Metcalfe, G. W., Genl. Smelter Foreman, Anaconda Cop. M. Co.,

Anaconda, Mont ’96 ,

*Meyee, a. E 403 New England Bldg., Kansas City, Mo. ’86

Middleton, W. B., Min. Engr., 671 Salisbury House, London Wall,

London, E. C., England. ’92

*Millen, Loeing E 149 Broadway, New York, N. Y. ’01

*Millee, Alfred S., Prof, of Mining, Met. and Geology.. .Moscow, Idaho. ’98 *Millee, Charles L., Genl. Supt, Am. Steel & Wire Co.,

Tradesmen Bldg., Pittsburg, Pa. ’93

Miller, Charles W., Min. Engr Denver Athletic Club, Denver, Colo. ’84

*Miller, D. Irving, Supt. of Furnace Division, Tenn. Coal, Iron

& E. R. Co., Sheffield, Ala. ’02 *Miller, Edmund H., Prof, of Anal. Chem. and Assaying,

Columbia Univ., New York, N. Y. ’95

*Millee, Harry E 331 Pine St, San Francisco, Cal. ’01

*Miller, Harry H., Min. Engr., Met. and Chem., Balzac Valley Co.,

13 Park Eow, New York, N. Y. ’95 *Miller, Harry W., Cons. Engr., Atlas Engine Wks , Capetown, So. Africa. ’92 *Miller, James, Supt., Sad Bento Gold Estates, Ltd.,

Minas Geraes, Brazil, So. America. ’95

*Millee, John, Min. Engr 6 Woodlands, Langside, Glasgow, Scotland. ’97

*Millee, Joseph, Mine Supt, Golden Age Cons , Ltd.,

Wiliena, Lake Way, Western Australia. ’99 *Miller, Leonard B., Iron Ore. Oglebay, Norton & Co., 67 Wade Bldg.,

Cleveland, Ohio. ’93

Miller, Spencer, Mech. Engr 96 Liberty St, New York, N. Y. ’90

*Miller, W. Clayton, Min. Engr , Mgr., Empire State-Idaho

Min. and Dev. Co., Wardner, Idaho. ’95 Miller, William P., Jr., Met, Selby Sm. & Lead Co.,

416 Montgomery St., San Francisco, Cal. ’93 *Mills, Charles E., Supt., Detroit Cop. M. Co., of Arizona.. Morenci, Ariz. ’90

*]V[iLLS, Eugene C., Min. Engr Minot, N. Dakota. ’01

*Mills, Frank P., Supt Merced G. M. Co., Coulterville, Cal. ’83

*Mills, Louis D.. .P* 0. Box 91, Lead, So. Dakota. ’01

Members And Associates.

Mixard, Frederick H., Min. Engr.. ..410 Equitable Bldg., Denver, Colo,

Mikehak, Michael M., Assayer Gabriel, Durango, Mexico. ’9S

*Mikgaye, John C. H., Analyst, Chem. Laboratory, Dept, of Mines,

Sydney, New South Wales. '91

AIitchell, D. P., Min. Engr Care Bewick, Moreing & Co.,

Auckland, New Zealand. '97

*Mitchell, George, Met Greene Cons. Cop. Co., Naco, Ariz. '99

Mitchell, Pentecost, Mine Supt Hibbing, Minn. '97

Mitchell, Robert, Miner and Shipper of Coal,

The North American Bldg., Philadelphia, Pa. '86 Mitchell, Walter K., Blast Furnace Specialties, W. K. Mitchell & Co.,

Betz Bldg., Philadelphia, Pa. '92

*Mitghener, Charles E., Min. Engr New Philadelphia, Ohio. '99

*]Mitinsky, Alexander N., Prof, of Mining, Academy of Empress

Catherine IL, St. Petersburg, Russia '00

*Mixer, Charles T., Chem Park City, Utah. '97

Mixsell, Philip, Min. and Milling 1266 Downing Ave., Denver, Colo. '02

*Moen, Philip W., 3d Vice-Pres., Amer. Steel and W ire Co. , W orcester, Mass. '82

*Moffat, a. D Granite Bi-metallic Cons. M. Co., Philipsburg, Mont. '88

Moffat, John Irvinehank, No. Queensland, Australia. '02

*Mohe, Louis, Secy, and Cons. Engr 32 Illinois St., Chicago, 111. '88

*Moldenke, Richard G. G., Cons. Met., P. O. Box 432, New York, N. Y. '98 *Molson, Charles A., Cons. Engr., Exploration Co., Ltd.,

Dooly Bldg., Salt Lake City, Utah. '87 Monell, Ambrose, Pres., International Nickel Co., 74 Broadway,

P. 0. Box 1325, New York, N. Y. '02

Monell, Joseph T Flat River, St. Fran9ois Co., Mo. '81

Montagu, Ralph L., Supt., Power Plant, Union G. D. Co.,

Centerville, Idaho. '01

**Montgomery, Alexander, Min. Engr. <fc Geol., State Mining Engr. Dept.

of Mines, Perth, Western Australia. '94 *Moody, Bubdett, Civil & Mining Engr., with Homestake M. Co.,

Lead, So. Dakota. '96

*Moore, Charles J-, Min. Engr P. 0. Box 548, Cripple Creek, Colo. '82

*Moore, Clinton H., Mining 328 East Broadway, Butte, Mont. '94

*Mooee, George, Agent, Amer. Sm. & Ref. Co., 135 So. 11th St., East,

Salt Lake City, Utah. '97

*Moorb, Marshall G., Min. Engr Cambria Steel Co., Johnstown, Pa. '86

*Mooeb, Milton J., Chief Chem 111. Steel Co., Joliet Wks., Joliet, 111. '98

*Mooee, Philip N., Cons. Min. Engr. and GeoL,

121 Laclede Bldg, St. Louis, Mo. '74

*Moegan, Charles H 21 Lincoln St,, Worcester, Mass. '74

Morgan, Joseph, Chief Engr Cambria Steel Co., Johnstown, Pa. '81

Morison, George S., Civil Engr 49 Wall Street, New York, N. Y. '79

*Morley, B. F., Mine and Smelter Mgr Buena Vista, Colo. '95

*Morley, Horatio T., Min. Engr., Lumber Merchant,

23 Kauter isidg., Detroit, Mich. '97

Mobley, Walter S., Instr. Assaying Univ. of Cal., Berkeley, Cal. '02

Morris, Charles E., Min. Engr. and Assayer Pony, Mont. '00

Morris, Frank H., Civil and Min. Engr., Guildhall Chambers,

Cardiff, So. Wales. '00 .Apartado 79, Durango, Durango, Mexico. '02

Morris, Frank L

Members And Associates.

Morris, Fred. L Oneida Gold Min. M. Co , Jackson, Cal. ’01

Morris, Henry C., Min. Engr., Reno Reduction Wks.,

Box 543, Reno, Hevada. ’02

Morris, Henry G., Engr. and Machinist, 408 Philadelphia Bourse,

Philadelphia, Pa. ’84

tf Morris, Israel W 225 So. 8th St., Philadelphia, Pa. ’75

*Morris, James, Min. Engr., The Chauntry House,

N'ewark-on-Trent, England. ’98 ftMoRRis, Rey. Richard J., Vicar of St. Paul’s Church,

248 South 3d St., Philadelphia, Pa. ’92 'Morris, William H., Iron Merchant, Morris, Wheeler & Co.,

400 Chestnut St., Philadelphia, Pa. ’81

*Moreison, Charles E., Civ. Engr Care B & M. Co., Butte, Mont. ’02

*Moreison, Edwin, Engr. and Asst. Mgr., Continental . Co.,

400 Chestnut St., Philadelphia. Pa. ’01 Morrison, Thomas, Genl. Supt ., Edgar Thomson Steel Wks., Braddock, Pa. ’96

*Morse, H. G.j Pres Hew York Shipbuilding Co., Camden, H. J. ’81

*Morse, Philip S Sulphide Corpu., Cockle Creek, Hew So. Wales. ’84

fMoRSE, Robert G Solar Motor Wks., 186 Devonshire St , Boston, Mass. ’99

*Morse, WYllard S., Genl. Mgr., Amer. Sm. & Ref. Co.,

Apartado A, Aguascalientes, Mexico. ’92 *Morton, Roscoe B., Mine Mgr... Tropic M. Co., etc., Idaho Springs, Colo. ’00

*Moses, Horace Santa Rita, Hew Mex. ’01

Mosley, Arthur, Genl. Mgr., Warden Gold Min. Co.,

Cassilis, Victoria, Australia. ’97

**Mosman, P, a., Met Eilers Plant, Amer. Sm. & Ref. Co., Pueblo, Colo. ’94

*Moss, Prof. Milton, Min. Engr Huntsville, Ala ’82

*Mott, Leslie C., Assayer and Met., Guanecevi M. Co.,

Guanecevi, Durango, Mexico. ’98

*Moulden, John C., Asst. Mgr. & Chief of Metl. Dept., Sulphide Corp., Ltd.,

Cockle Creek Wks., Cockle Creek, Newcastle, Hew South Wales. ’97 *Moulder, Hamilton L., Chem., Barranca Copper Co.,

Barranca del Cobre, Chihuahua, Mexico. ’99 Moule, John W., Met. Chemist, Sulphide Corporation, Ltd.,

Cockle Creek, Hew South Wales, ’01

Moxham, Edoar C 80 William St., Hew York, H. Y. ’91

Mudd, Seeley W., Engr. of Mines, Mine Mgr Leadville, Colo. ’83

*Mugoley, Henry H., Genl. Mgr., Hational Sm. Co.,

402Tremont Bldg., Boston, Mass. ’01

*Muir, David, Engr Trinity Cop. Co., Rennet, Cal. ’02

*Muir, Thos. R., Min. Engr. and Mine Owner, 54 McRay Bldg., Portland, Ore. ’ 01 *Munbo, Charles H., Supt., Oroville Gold Dredging & Exploration Co.,

Oroville, Cal, ’99

**Munroe, Charles E., Prof, of Chem., Columbian Univ., Washington, D. C. ’95 Munroe, Henry S., Prof, of Mining, School of Mines, Columbia Univ.,

'Hew York, H.Y. ’72

Murdoch, Charles R., Mgr., Standard Min. Co., Contact, Park Co. Mont. ’02 *Murphy, Thomas D., Secy., El Oro Mining & Ry . Co. , Ltd. , El Oro, Mexico. ’96 *Murray, Charles B., Chief Chem,, Edgar Thomson Steel Wks.,

Carnegie Steel Co., Braddock, Pa. ’90 fMuRBAY, F. Doug-las, Assayer, Jumpers Deep,

P. 0. Box 1056, Johannesburg, Transvaal, So. Africa. ’97

Membees And Associates.

**MiJRRAy, George, Civ. and Min. Engr ..112 W. 80th St., New York, N.Y. ’82

Murray, James J., Asst. Sm. Supt Keswick, Cal. ’02

, a. D., Enterprise Aline Collingswood, Ont., Canada. ’02

*AIessex, Horace AY., Min. Engr., Supt., Enterprise Mine,

Nelson, B. C., Canada. ’00

AIyers, James AAA, Supt., R. AL S. Co Buena Vista, Colo. ’01

AIyrice:, Charles AI., Alin. Engr 2709 Pine St., San Francisco, Cal. ’97

*Nack, Charles, Min. Engr. and Aline Owner,

Caixa 46, Bahia, Brazil, So. America. ’00

*Nahl, Arthur C., Alin. Engr Llano, Sonora, Alexico. ’02

Nardin, Errest ay., Alin. & Alet. Engr.,

Kirtling,” Chatswood, New So. AYales. ’01

Nason, Frank, L AYest Haven, Conn. ’91

Nathan, Albert F., Jr., Asst. Examiner, U. S. Patent Office,

AYashington, D. C. ’00

Nau, John B., Algr United Steel Co., Canton, O. ’02

*Nawatny, AYilliam F., Alin. Engr., Texas Alidland Ey Co.,

Lock Box 95, Terrell, Texas. ’01

**Neale, Arthur Leggett, Aline Algr., Glynns Lydenburg, G. M. Co.,

Ltd., P. O. Lydenburg Transvaal, S. Africa. ’97 **Nebeker, AYilliam G., Chern. and Supt. of Mines,

35 East 1st North St., Salt Lake City, Utah. ’99

Nepf, Jacob H., Aline Supt Colfax, Cal. ’97

*Neill, James AY., Cons. Alin, and Aletl. Engr.,

Room 510, Dooly Blk., Salt Lake City, Utah. ’79

*Neill, AYilliam L Solvay Process Co., Syracuse, N. Y. ’80

*Neilson, Thomas, Metl. and Chemist, 424 O’ Farrell St., San Francisco, Cal. ’97 Neilson, William G., Pres , Republic AI. & AI. Co.,

1111 Harrison Bldg., Phiiadelplua, Pa. ’72

Nelson, DeWitt C., Alin. Engr. Grantville, Ga. ’99

Nesbitt, Martin J., Alech. and Alin. Engr., Becerra, Nesbitt & Co.,

Urique, Chihuahua, Mexico. ’97

*Nesmith, John AY"., Pres Colorado Iron AYorks Co., Denver, Colo. ’96

*Neustaei)tee, Arthur 2727 Glasgow Ave., St. Louis, Mo. ’86

*Newhall, CHARtEsS., Alin. Engr Ouray, Colo. ’01

*Newman, AIaurice A Chinipas, Chihuahua, Mexico. ’01

Newsom, John F., Assoc. Prof, of Min. and Met Stanford Univ , Cal. ’95

fNEWTON, Chauncey G 912 Neil Ave., Columbus, Ohio. ’91

*Newton, Edwin W., Geol 212 E. Chesnut St., Carthage, Mo. ’97

*Nichol, Thomas, Civ. and Alin. Engr., Care McKell Coal & Coke Co.,

Glen Jean, W. Va. ’96

**Nicholas, Askin AI., Mine Mgr., Bank Place, Collins St.,

Melbourne, Victoria, Australia. ’00 *Nicholls, George A., Assayer and Chem..William St, Deadwood, So. Dak. ’01

*Nichols, Harvey B., Metallurgist Selby S. & L. Co., Selby, Cal. ’02

*Nichols, Henry W., Asst Curator of Geol., Field Columbian Museum,

Chicago, 111. ’00

*Nichols, j. Clayton, Alin. Engr Grand Junction, Colo. ’95

*Nichols, Ralph, Civil and Min. Engr 140 Burton St, Aurora, 111. ’93

*Nichols, William H., Jr., Min. Engr., Nichols Chem. Co., Pres., San

Carlos Cop. Co., 25 Broad St, New York, N. Y. ’98

Members And Associates.

Nicholson, Frank, Cons. Min. Engr., Man. Dir., Anglo-Amer. Zinc Fields,

Ltd., McKinley Bldg., Joplin, Mo., 253 Broadway, New York, N. Y. ’80 Nicholson, Hudson H., Prof, of Chem., Dir. School of Mines & Metal- lurgy, Univ. of Nebraska, 404 Peoples Bank Bldg., Denver, Colo. ’01 *Nicolaus, George R., Cons, Min. Engr., Mercer, Nicolaus & Co.,

Bloomfield House, 85, London Wall, E. C., England. ’01

*Nicode, Benjamin 68 Wall Sc., New York, N. Y. ’92

Nicolson, Geo. W Idaho Springs, Colo. ’02

“Nicolson, Robert B...Ivanhoe Gold Corp., Ltd.., Boulder, W. Australia. ’02 Nis, Edward A., Min. Eng., Crown Reef G. M. Co.,

Box 1081 , Johannesburg, So. Africa. ’02 *Nisb;io, Keijiro, Mine Inspector, 7 Konya St., Shidzuoka City,

Suruga, Japan. ’00

*Noble, Albert E Woodstock Iron Wks., Anniston, Ala. ’90

*Noble, Louis S., Min, Engr 930 Equitable Bldg., Denver, Colo. ’89

*Noon, Edward E., Supt. Santa Rosalia Aline, Arizpe, care Pico Co.,

Sonora, Alexico. ’97

*Noon, Thomas F., Genl. Mgr Illinois Zinc Co., Peru, 111. ’01

Norman, John E., Chem. and Assay er, 302 Alining Exchange,

Denver, Colo. ’99

fNoRBiE, A. Laneear 41 Wall St., New York, N. Y. ’90

*Norris, Frank: Lee, Mgr., Don Carlos and Eureka Cons. Mining Co.,

Apartado 79, Durango, Durango, Mexico. ’02 *Norris, R. Van A,, Asst Engr., Penn R.R. Coal Co., 1st Nat. Bk. Bldg.,

Wilkes-Barre, Pa. ’85

*North, Edmund D., Alin. Eng Grub Gulch, Aladera Co., Cal. ’02

Norton, Edwin, Pres Amer. Can Co., 11 Broadway, New York, N. Y. ’97

**Nobton, R. H.j Alin. Engr., 1242 New Hampshire Ave., Los Angeles, Cal. ’98

*Noyes, Henry, Engr 17 Queen St., Melbourne, Australia. ’99

Noyes, Dr. W. a Amer. Chem. Soc., Terre Haute, Ind. ’02

*Noyes, William S., Min. Engr., Algr Presideo M. Co., Shafter, Texas. ’84

Nye, Robert, Min. Engr., Mgr., Moline M. Co., Oaks M. Co.,

Placerville, Idaho. ’98

Oakes, Francis J., Jb., Man. Engr., Care Oakes Alfg. Co.,

58 Pearl St., Boston, Alass. ’98

*Oddie, Tasker L., Mining Butler, Nye Co., Nev. ’02

*Odling, F. J., Civil Engr P. O. Box 314, G. P. O., Melbourne, Australia. ’93

*Op, Charles, Supt. of Alill Enterprise, via New Denver, B. C., Canada. ’97

*Oglebay, Earl W., Iron Mfg 38 Wade Bldg., Cleveland, Ohio. ’80

Oglesby, Milton L., Mechanical and Min. Engr.,

429 Atlas Block, Salt Lake City, Utah. ’02 *Olcott, Eben E., Cons. Min. Engr., Olcott, Corning & Peele,

36 Wall St, New York, N. Y. ’74

*Olcott, William j., Genl. Supt,U. S. Steel Corp. Mines oii Mesahi Range,

Pres., Duluth, Mesahi & N. Ry., Duluth, Minn. ’87 *Oldoeep, Adolph, Examining Engr.,

P. 0. Box 852, Parral, Chihuahua, Mexico. ’90

Oliver, Edwin L., Min. Engr 101 Vernon St, Oakland, Cal. ’02

f Oliver, Gen. Paul A., . of Powder Oliver’s Mills, Pa. ’71

OoTHOUT, William, Min. Engr and Chemist Santa Barbara, Cal. ’90

Wrd, William D., Genl. Mgr., Coal and Coke Plant, Empire Coal &

Coke Co., Landgraff, W. Va. ’88

Membbes’And Associates.

*Ordo:nez, Ezeqtjiee, Sub Dir., Inst. Geol. de Mexico,

la Presidente 1245, Mexico Citj, Mexico. ’00 Oedway, J. M., Prof, of Biology, Tnlane Uniy.,

3125 Chestnut St., New Orleans, La. ’73

*Orfoed, Ernest V., Mine Mgr De Lamar, Idaho. ’02

*Oemrod, George, Mgr. and Treas., Donaldson Iron Co.,

Emaus, Lehigh Co., Pa. ’81

*Ormrod, John D., Mech Engr Emaus, Lehigh Co., Pa. ’89

*Ormsbee, James J., Asst. Supt El Paso Sm. Wks., El Paso, Texas. ’87

O’Eotjrke, Michael 243 So Fifth vSt., Salt Lake City, Utah. ’99

*Orr, Alexander Anal. Chem. and Assayer,

SSBligh St., Sydney, New South Wales. ’01

*Orr, William, Met P. O. Box 953, Salt Lake City, Utah. ’97

Osborne, Francis D., Min. and Conslt. Engr., Ipoh, Perak, Straits Settle- ments, Malay Peninsula. ’’00

*OsBORNE, Henry Z., U. S. Marshal Southern Dist. of Cal., Pres. Union Con.

Gold Mines Co., 740 So. Hope St., Los Angeles, Cal. ’00

Osgood, F. C., Min. Engr Band Drill Co., 128 Broadway, New York, N. Y. ’87

*OsGOOD, Samuel W., Jr 15 Temple Court Bldg., Chicago, 111. ’00

**OsHiMA, Bohtjro, Dir. & Genl. Mgr., Hokkaido Colliery & E.R. Co..

Sapporo, Hokkaido, Japan. ’97 Osmond, Floris 83 Boulevard des Courcelles, Paris, France.

Ostrander, J. E., Prof, of Engineering and Math., Mass. Agric. College,

Amherst, Mass. ’94

Oswald, William, Genl. Mgr., Bombach Iron & Steel Co., Bheinzollstrasse

6, Coblentz, Germany. ’99

*Overpece:, a. L., Assayer Rapid City, So. Dakota. ’02

*OwEN, JosiAH, Min. Engr. and Geol Medford, Ore. ’00

*OxNAM, Thomas H., Genl. Mgr Chinepas, Chihuahua, Mexico. ’91

*Packard, George A., Min. Engr 18 Lafayette St., Wakefield, Mass. ’92

Paddock, J. H St. Johnsbury, Vt. ’82

*Page, Clarence Y., Asst. Engr Anaconda Cop. M. Co., Butte, Mont. ’00

Page, George S., Supt., Park Wks. Crucible Steel Co. of Am.,

Care Park Works, Pittsburg, Pa. '86

*Page, Walter T Omaha & Grant Sm. Ref. Co., Omaha, Neb. ’82

*Page, William Byrd 932 Equitable Bldg., Denver, Colo. ’77

*Page, William N., Civil Engr. and Min. Engr., Pres., Gauley Mt.

Coal Co., Ansted, W. Va. ’SO

*Pagliuchi, Frank D., Care J. Eamacciotti, 164 W. 27th Street,

New York, N. Y. ’01

fPAiNTER, Augustus E. W., Pres Peoples Nat. Bank, Pittsburg, Pa. ’73

fPAiNTER, Park, Mfr 247 Fourth Ave., Pittsburg, Pa. ’90

Painter, Robert K., Min. Engr Cabin Branch Mine, Dumfries, Ya. ’97

Painter, William, Mech. Engr 1523 Guilford Ave., Baltimore, Md. ’93

*Palacios, JosEi G., Federal Assay Officer, Chief, Oficina Federal de Ensaye,

Monterey, N. L., Mexico. ’98

*Palmer, Cortlandt E., Min. Engr., Genl. Mgr., Mollie Gibson Con. M. &

M. Co., P. 0. Box 668, Colorado Springs, Colo. ’89

*Palmeb, Edward Y., Min. Engr 723 30th St, Denver, Colo. ’92

Palmer, Ernest E Two Sisters M. <fe M. Co., Lawsrm, Colo. ’02

*Palmer, Obed a., Min. Engr , Ontario & Daly Mines, Room 8 Masonic

Bldg., Salt Lake City, Utah. ’87

Members Associates.

Palmer, Egbert E., Min. Engr., Mgr., Underground Dept., Eio Tinto

Aline, Province Huelva, Spain. '00 Palmer, Thomas H,, Aline Algr. and Alet., Overflow Alines,

Bobadali, Eew Soutli ATales. ’ 99

Pardee, I. P,, Alin. Engr., Pres Hazleton Iron AVks, etc., Hazleton, Pa. '73

*Parfet, J. AI National Hotel, Cripple Creek, Colo. '99

*Pare:, James, Prof, of Alining and Dir., Otajo Univ. School of Alines,

Dunedin, New Zealand. '97

Park, AIungo, Alin. Engr Plas Trevor, Llanduno, No. AAales. ’02

*Park, Walter E , Engr. and Algr., Fraser & Chalmers, Ltd.,

P. O. Box 619, Johannesburg, Transvaal, S. Africa. '92

*Pare:e, WilliAxM G., AA Pres People’s Coal Co , Scranton, Pa. ’91

Parker, Edward W U. S. Geol. Survey, Washington, D. C. '90

*Parker, J. L., Alin. Engr. and Alanager, North Star Alin. Co., '

Kimberley, B. C., Canada. '97

*Pare:er, ErcHARD A., Cons. Alin. Engr., U. S. Alfg. Co., Centennial-Eureka

Alfg. Co., etc., 4 P. 0. Square, Boston, Alass. '82

Parker, Eussell 3405 Oakhill Ave., St. Louis, Mo. '82

5<-Parker, Willard J., Aline Algr Apartado 83, Chihuahua, Mexico. '02

Parker, William J., Jr 65 Brainard Ave , Cleveland, Ohio. '98

*Parkih, Charles, Dir Crescent Steel Co., Pittsburg, Pa. '75

fPARKiN, AVilliam AI New Kensington, Pa. '01

*Parks, James F., Supt Kennedy & South Eureka Alines, Jackson, Cal. '00

Parnall, S. a 900 Alesa Ave., El Paso, Texas. '90

Parrish, Samuel F., Aline Algr. C." Chartered Co., Ltd.,

Greenwood, B. C., Canada. '97

*Parsons, Charles B St. Joseph Lead Co., Bonne Terre, AIo. '74

Parsons, William B., Civil Engr 22 AVilliam St., New York, N. Y. '91

*Passow, Fredh. AI., Alin. Engr., Boeh. & Pittsburg C. & S. Co„

Punxsutawney, Pa. '02

*Patch, AIaurice B., Supt Buffalo Sm. Wks., Buffalo, N. Y. '83

*Patersoh, Edward A., Alin. Engr., Care E. AI. Touzeau & Co.,

31 St. S within’ s Lane, London, England. '00

Paterson, Geo. A Orgaum Gold Alg. Co., Alysore State, So. India. '01

Pattberg, Otto F., Alin. Engr., Montgomery AI. Co., Camden,

Alontgomery Co., N. C. '00

*Pattersoh, George H., Aline Supt 232 So. 13th St., Denver, Colo. '99

'Patterson, G- S., Civil and Min. Engr.,

400 Opera House Blk., Terre Haute, Ind. '88 *Pattebsoh, E. P., Agent, Bachman's System of Water Purification,

1001 Harrison Bldg., Philadelphia, Pa. '86 *Paxtersoh, Seely B., Treas. & Asst, to Pres., Empire Steel & Hon Co.,

Catasauqua, Pa. '88

fPATTisoN, Myrox A., Aletallurgist 1360 Vine vSt., Denver, Colo. '02

*Paul, Hexry, Mgr Aspen Mine, P. O. Box 596, Denver, Colo. '89

Pattli, Dr. H., Met. Engr., 14®' Junghofstrasse,

Frankfurt-on-Main, Germany. '02

*Payxe, a. C., Min. and Met. Engr Apartado 59, Durango, Mexico. '91

Payxe, C. Q., Min. Engr 99 John St., New York, N. Y. '81

Payxe, Herbert G-., Stettin Lodge, St. Faith’s Boad, West Norwood,

London, England. '97

Pearce, Frark E., Mine Mgr., Iron Dyke Copper Mining Co.,

Homestead, Ore. '00

Members And Associates.

*Peaece, Haeold V., Metallurgist Boston & Colo. Sni. Co., Argo, Colo. '01

**Peaece, Eichard Argo, Colo. '74

*Peaece, Eichard F., Met., Mgr Colorado Sm. and M. Co, Butte, Mont. '99

*Peaece, Stanley H., Mining Magdalena, Sonora, Mexico. '96

*Peaesall, H. D., Civil Engr.,

21 Parliament Hill, Hampstead, X. W., London, England. '82 **Pearse, Arthur L., Cons. Min. Engr.,

Worcester House, Walbrook, London, E. C., England. '90

Peabse, John B 317 Walnut Ave., Eoxbury, Mass. '72

*Pearson, Feed. S., Cons. Engr., Eoom 220, 29 Broadway, 'New York, X. Y. '96

Pearson, John E., Min. Engr 118 Princes Eoad, Liverpool, England. '82

Pearson, J. F., Min. Engr., James Martin & Co.-Gawler, South Australia. '93-

*Pease, F. X P. O. Box 210, Altoona, Pa. '82

Pechin, Edmund C., Eetired Torega, Va. '71

, John S The Colonial, 6325 Monroe St., Chicago, 111. '92

Peck, Clarence B., Sales Agent Jeffrey Mfg. Co., Columbus, Ohio. '00

Peckitt, Leonard, Pres Empire Steel & Iron Co., Catasauqna, Pa. '83

Pbdley, William E., Genl. Mgr. and Chief Engr., San Jacinto Land Co.,

515 Magnolia Ave , Eiverside, Cal. '91

*Pei)Razzini, John, Mine Owner Locarno, Switzerland. '01

*Peele, Eobert, Adjunct Prof of Mining, School of Mines, Columbia XJniv.,

36 Wall St., Xew York, X. Y. '83

*Peile, William, Min. Engr.,

Southampton Lodge, Oakleigh Park, Whetstone, London, X. England. '97 Peirce, William H., Mgr., Balt. Cop, & Sm, & Boiling Co.,

Keyser Bldg., Baltimore, Md. '94

Pelatan, Louis, Cons. Engr. & Met 5 Square de 1' Opera, Paris, France. '94

*Pendleton, Joseph S., Asst. Supt. & Genl. Sales Agt.,

Carpenter Steel Co., Beading, Pa. '02

*Penhale, Matthew, Min. Engr Black Lake, Quebec, Canada. '91

*Pennock:, J. D., Chemist Solvay Process Co., Syracuse, X. Y. '89

*Peneose, R. A. F., Jr., Min. Engr. and GeoL, Pres., Commonwealth M.

and Milling Co. of Arizona, 460 Bullitt Bldg., Philadelphia, Pa. '89

*Pentland, Walter, J 1921 Bush St., Los Angeles, Cal. '01

*Percy, John C., Mech. Engr Colo. Fuel and Iron Co., Pueblo, Colo. '02

*Perez, Richard A., Assayer and Anal. Chem.,

120 Xo. Main St., Los Angeles, Cal. '00

*Perin, Charles P., Cons. Engr..., 71 Broadway, New York, X. Y. '90

Perkins, Henry C., Min. Engr 38 Broad St., Xew York, N. Y. '81

Perkins, Walt. G Granby M. & S. Go, Grand Forks, B. C., Canada. '01

*Perry, Oscar B., Min. Engr Oroville, Cal. '01

*Perry, Robert S., Genl. Mgr., 5104 Pulaski Ave., Germantown, Phila., Pa. '95

Perry, W. a 7 East 56th St., New York, X. Y. '83

Peters, Edward H., Min. Engr 38 Percival St., Dorchester, Mass. '72

Peters, Richard 302 Girard Bldg., Philadelphia, Pa. '84

Peters, Richard, Jr., Secy, and Treas., Solid Steel Casting Co.,

Chester, Pa. '02

*Petersdorpf, C. F. von, Min. Engr., Care Cuno von Campe,

481 Monroe St., Brooklyn, X. Y. '02 Peterson, Bertel, Genl. Mgr., Grand Central M. Co., Ltd.,

Torres, Sonora, Mexico. '00*

**Pettee, William H., Prof. Min, Econ., Geol. and Min. Engr.,

XJniv. of Michigan, 554 Thompson St., Ann Arbor, Mich. '71

Members Associates.

Ixxr

*Petttgbew, Chaeles, Gen. Supt., Maryland Steel Co., Sparrows Point, Md. ’84 *Pettit, Aethijb E., Min, Engr., Simmer & Jack East, Ltd.,

P. 0, Box 47, Germiston, Transvaal, So. Africa. ’98 Peeiffee, Geoege W., Civil Engr.,

Spanish-American Iron Co., Daiquiri, Cuba. ’97

*Pfoeete, Otto F., iVIin. Engr Rutherford, N. J. ’89

Philbeick, Aethite, Min. Engr 304 Abington Bldg., Portland, Ore. '02

*Philips, Joseph, Je., Con. Engr Ocotlan, Oaxaca, Mexico. ’95

Phillips, A. G P-0. Box 5793, Johannesburg, So. Africa. ’91

Phillips, Feancis C., Chemist, Prof , Chem., Western Dniv... Allegheny, Pa. ’94 **Phillips, Joseph L., Engr., Dir., Campania de Inguaran,

Ortega 28, Mexico City, Mexico. ’01 *Phillips, Thomas H., Proprietor, Phillips Rock Drill Co.,

40 No. 7th St., Philadelphia, Pa. ’87

Phillips, Wm. B., Director Texas M. Survey, Austin, Texas. ’87

*PiDDiHGTOH, F. L Chillagoe, Queensland, Australia. ’01

*PiERCE, James B., Genl. Mgr. of Sharpsville Furnace Co..Sharpsville', Pa. ’86

*PiLGEERiM, JohhJ Eureka, Utah. ’02

*PiLKiNGTON, Herbert, Genl. Wks. Mgr., Sheepbridge

Coal and Iron Co , Ltd., Chesterfield, England. ’98

fPiLLiNG, William S 614 Girard Bldg,, Philadelphia, Pa. ’91

*PiHCHOT, Gifford, Forester Dept, of Agriculture, Washington, D. C. ’98

*PiNDEE, Joseph W., Min. Engr., Genl. Mgr., Yosemite G. M. Co.,

Hotel Oliver, San Francisco, Cal. ’92

*PiHKHAM, W. F Hyde Park, Mass. ’82

*PiPEE, J. W. H Address wanting. ’99

*PiTCAiEN, Robert, Asst, to the Pres., P. R.R., Union Station,

Pittsburg, Pa. ’83

*PiTHiH, Lucitrs, Analyt. and Cons. Chem...20 Fletcher St., New York, N.Y. ’94 *PiTKiH, Stephen H., Genl. Mgr , Webster, Camp & Lane Co.,

642 W. Market St., Akron, Ohio. ’87 *PiTMAisr, Stephen M., Secy. Narragansett Mut. Fire Ins Co.,

721 Banigan Bldg., Providence, R. I. ’73 **Platee, John E., Banker, Los Angeles Savings Bank, 102 Baker Blk.,

Los Angeles, Cal. ’73

*Platt, Edwin H., Asst. Mgr., Denver Engineering Wks Co., Denver, Colo. ’02 *Platt, Frank E., Civil Engr., Asst. Treas., Scranton Coal Co.,

Board of Trade Bldg., Scranton, Pa. ’81 *Plxjemee, Adolph, Vice-Pres., Beveridge-Pluemer Co,,

10 Wall St., New York, N. Y. ’81

*, Robert E 302 Union Trust Bldg., Detroit, Mich. ’84

*Poage, Josiah G., Met., Broken Hill Proprietary Co., Ltd.,

Port Pirie, South Australia. ’92

*PoiNDEXTER, CHARLES L., Min. Engr., Tombstone Con. M. Co., Ltd.,

Tombstone, Ariz. ’02

*PoiNDEXTEB, Henry T., Surveyor and Assayer Dillon, Mont. ’97

*P0LLED0, Y., Genl. Mgr Matanzas E.E. Co., Matanzas, Cuba. ’89

*PoLLEN, Clement H., Mine Mgr Fort Steele, B. C., Canada. ’02

**PoLLOK, James H., Asst. Chem., Royal College Science... Dublin, Ireland. ’93

**PoMEBOY, James H 699 Hoyt St., Portland, Ore. ’89

*Poole, Herman 157 W. 106th Street, New York, N. Y. ’00

Pope, Frederick J...Care Ricketts & Banks, 104 John St., New York, N.Y. ’99

Members And Associates.

*PoPE, J. D., Min. Engr Butte & Boston Cons. Mining Co., Butte, Mont. ’91

PopE, Thomas E , Prof, of Genl. Chem., Mass. Inst, of Tech... Boston, Mass. ’86 ’Porter, H. Hobart, Jr., Cons. & Contracting Electrical Engineer,

Sanderson & Porter, 31 Nassau St., New York, N. Y. ’86

Porter, James M., Civil Engr 53 No. 3d St., Easton, Pa. ’91

Porter, Jamies McDill, Cons. Min. Engr., etc.,

P. O. Box 804, Spokane, Wash. ’00

*PoRTER, John A., Min. Engr Denver Club, Denver, Colo. ’74

'Porter, John B., Prof, of Min. Engineering, McGill Univ.,

Montreal, Canada. ’83

tPoRTEB, WiletamH.j Vicc-Pres , Chemical Nat. Bank,

270 Broadway, New York, N. Y. ’99 PosTLETHWAiTE, ROBERT H-, Min. and Mech. Engr., Eisdon Iron Wks.,

San Prancisco, Cal. ’01

Potter, Edward C., Genl. Supt 7-57 The Rookery, Chicago, 111. ’79

*PoTTER, J. A 2002 Fifth Ave., New York, N. Y. ’90

Potter, Prof. William B., Min. Engr. and Met., Mgr., St. L. Samp. &

Test. Wks., 1225 Spruce St , St. Louis, Mo. ’71 "Potter, William C., Min. Engr., Care Dickman, Mackenzie & Potter,

1104 The Rookery, Chicago, 111. ’97 PoTTS, Francis L., Pres., Enterprise Transit Co.,

770 Bullitt Bldg., Philadelphia, Pa. ’82 "PoTTS, George E., Explosives Mfr., Supt., Amer. Forcite Powder Co.,

Landing, N. J. ’88

*Potts, George H., Pres Potts Bros. Iron Co., Ltd., Pottstown, Pa. ’88

'PoTTS, William M., Mgr Isabella Furnace, Wyebrook, Pa. ’86

’Powel, DeVeaux, Genl. N. Y. Agent, Sterling Coal Co.,

29 Broadway, New York, N. Y. ’84 "Pow’'EL, Godwin H., Asst. Man. Dir., Mount Carbon Co., Ltd.,

Powellton, Fayette Co., W. Va. ’97

Powell, Frederick, Min. Engr 100 First St, Portland, Ore. ’95

*Powell, John H., Min. Engr...Elandslaagte, Dukes Ave., Chiswick,

London, S. W., England. ’00

Powell, Louis W,, Agent, Oliver Iron M. Co.,

312 Exchange Bldg., Duluth, Minn. ’00

*Powell, Robert W., Min. Engr Tararu Creek, Thames, New Zealand. ’01

**PowER, Frederick D., Min. Engr. and Met,

68 J Pitt Street, Sydney, New South Wales. ’91 *PowEB, Harold T., Min. Engr. & Mine Mgr., Hidden Treasure Gravel

M. Co., Sunny South, Michigan Bluff, Cal. ’97 *PowER, I. M., Min. Engr., Mng. Dr., T. Sopwith & Co., Ltd., and Brit

V. -Consul., Linares, Provincia de Jaen, Spain. ’88 Pratt, Joseph H., Cons. Min. Engr. and Mineralogist,

74 Broadway, New York, N. Y. ’97 *Preston, Edmund B., Min. Engr., Asst. State Mineralogist, Cal. State

Min. Bureau, San Francisco, Cal. ’96

Price, Thomas, Min. Engr. and Met.,

526 Sacramento St., San Prancisco, Cal. ’85 *Priohard, William A., Genl. Mgr., Lake View Consols, Ltd.,

Boulder, Western Australia. ’98

'Peidham, Harvey, Min. Engr., West Harptree Vicarage, West Harptree,

near Bristol, England. ’96

Members And Associates.

Pringle, Henry A., Min. Engr.,

P. 0. Box 98, Bulawayo, Ehodesia, So. Africa. *97 ‘Pringle, Robert Wm., Min. Engr. ...18 Rutland Sq., Edinburg, Scotland. ’02 Pritchard, *VYilliam, Assayer and Reduction Officer, Mysore Gold

Mines, Alarikuppam, Mysore, India. ’00 Pritchett, C. W., Je., Min. Engr., Room 719, Mining Exchange Bldg.,

Denver, Colo. ’86

*Probert, Prank H., Min. Engr 231 Bradbury Bldg., Los Angeles, Cal. ’00

*pROSSER, Herman A., Mgr DeLamar Copper Ref. Wks., Carteret, R. J. ’97

*Peovis, Richard 14 Benventon Terrace, Rederitb, Cornwall, England. ’91

*Provot, Francis A., Min. Engr P. 0. Box 755, Bisbee, Ariz. ’00

**PuLL]viAN, J. Wesley, Miner of Iron Ores, 238 So. 3d St..Pliiladelphia, Pa. ’81 PuLLON, Joseph T., Civil and Min. Engr., 75 Victoria Road,

Headingley, Leeds, England. ’91

*, John L., Min. Geol 10 Oxford St., Cambridge, Mass. ’02

*Purdue, Albert H., Prof, of Geol...Univ. of Arkansas, Fayetteville, Ark. ’97 *PuRiNGTON, Chester W., Min. Engr.. ..406 Harvard St., Brookline, Mass. ’96 *PijRINGton, D. V., Brick Mfr 922 Chamber of Commerce, Chicago, 111. ’00 Putnam, BenjImin R., Assayer, Montana Ore Purchasing Co., Butte, Mont. ’97 *Putnam, Douglas G., Genl. Supt., Ashland Coal & Iron R.R. Co.,

Ashland, Ky. ’99

*Quarrier, Keith D., Electrician.. ..508 Kanawha St., Charleston, W. Va. ’01 *Queneau, A. L. L, Min. Engr., Rew Jersey Zinc Co.,

Passaic Ave., Newark, N. J. ’02

tQuiBR, Edwin A., Secy., Reading Fire Brick Wks., 4th and Canal Sts.,

Reading, Pa. ’92

Quintard, Edward A., Min. Engr Batopilas M. Co., Batopilas, Mexico. ’89*

*Rader, Charles I., Genl. Mgr Annie Laurie M. Co., Kimberly, Utah. ’75

f Radford, William H., Min. Engr 310 Pine St., San Francisco, Cal. ’76

*Ragaz, Ivan, Supt. of Mines Sierra Mojada, Mexico. ’02

*Raht, August, Cons. Met., Amer. Sm. & Ref. Co.,

71 Broadway, New York, N. Y. ’86

Ralston, John C., Min. Engr Ziegler Block, Spokane, Wash. ’98

Ralston, William C., Mine Mgr. 331 Pine St , San Francisco, Cal. ’90

Ramos, Ricardo G., Asst., Oficina Federal de Ensaye,

' Monterey, N. L., Mexico. ’98

*Ramsay, Erskine, Chief Engr. and V. Pres., Pratt Coal Co. and Globe Coal

Co., 2024 First Ave , Birmingham, Ala. ’88

*Eand, Charles F., Mine Owner 71 Broadway, New York, N. Y. ’97

*Eand, Jasper R., Pres. ..Rand Drill Co., 128 Broadway, New York, N. Y. ’00

*Rand, Theodore D., Lawyer 17 So. 3d St., Philadelphia, Pa. ’73

*Randall, Benjamin G., Min. Engr., Pres. & Treas. T. M. Co.,

Taos, New Mexico. ’99

Randall, Huntley B. S., Sec. & Genl. Mgr. of the Peralta Mining Co.,

Jimulco, Coahuila, Mexico. ’02 *Randol, James B., Mining & Beal Estate, 17 W. 73d St, New York, N. Y. ’79

Randolph, Beverley S., Mine Supt Cons. Coal Co., Frosthurg, Md. ’91

Randolph, Edward, Smelting 79 Passaic Ave., Newark, N. J, ’02

Randolph, John C. F.,'Cons. Min. Engr., Mills Bldg.,

15 Broad St, New York, N. Y. ’75-

Membeks And Associates.

*Ransome, Frederick Leslie, Min. and G-eoL, U. S. Geol. Survey,

Wastington, B. C. 01

Eathboene, Merwyn R. W., Mine Mgr Rilverton, B. C., Canada. 98

Ratliff, Charles L., Min. Engr. San Pedro, New Mexico. ’02

Battle, W. J., Anal. Chem 17 Mercantile Bank Bldg., Cleveland, Okio. '84

*Eaven, Feed. R., Supt., Coal Mines Nuttallburg, Fayette Co., W. Va. '01

Rawlings, Stuart L San Luis M. Co., San Dimas, Durango, Mexico. ’02

"Ray, Frakk A , Chief Engr. Columbus & Hocking Coal & Iron Co.,

187 King St., Columbus, Ohio. '90

"'Bayfield, John W., Min. Engr. Menzies, Western Australia. '98

*Ray"mond, R. M., Min. Engr., Genl. Mgr., El Oro Min. & E.R. Co.,

El Oro, Mexico, Mexico. '85

*Raymond, R. W., Secy., American Institute of Mining Engineers,

99 John St., New York, N. Y. '71 Raymond, Stephen S., Supt. of Smelter, Care The Copper King, Ltd.,

Bay Point P. O., Cal. '02

fREA, William H., Treas., Mesta Mach. Co., 708 Lewis Bldg., Pittsburg, Pa. '86

’Read, Abraham L P. O. Box 186, Lead, So. Dak. '95

Reading, Richard W-, Assayer, New Gold Coast Agency, Ltd ,

Tarkwa, West Africa, '02

"Reckhart, Daniel W. , Prop., Independent Assay Office,

P. O. Box 88, El Paso, Texas. '01 *Recknagel, Rudolf, Min. Engr., 5 Koenig's Allee, Grunewald,

Berlin, Germany. '96

Redfearn, Albert M., Chemist Sultepec, Mexico, Mexico. '02

Redmayne, R. a. S., Prof, of Mining, The University,

Birmingham, England. '02

Eeed, David C., Min. Engr., Pilieys Island Pyrites Co.,

Pilleys Island, Notre Dame Bay, Newfoundland. '01

*Reed, Henry S., Assayer and Met P. 0. Box 82, Medford, Ore. '98

*Rees, David, Min. Engr Wardner, Idaho. '00

Reese, Arnold K., Supt., Blast Furnaces, Care Guest, Keen & Co-, Ltd.,

East Moors, Cardiff, South Wales. '91

’Reeves, David, Pres Phoenix Iron Co., Philadelphia, Pa. '86

*Regel, Ferdinand H., Secy., Arthur Fritsch Foundry & Machine Co.,

212 Gratiot St., St. Louis, Mo. '00

*Beid, John Alex., Min. Engr North Brookfield, Nova Scotia. '02

*Reid, JohnH., Mine Owner... “Stannum." Tenterfield, New South Wales. '91

*Remsen, Ira, Prof, of Chem Johns Hopkins Univ., Baltimore, Md. '97

Reno, Jesse W., Min. Engr., Pres., Reno Inclined Elevator Co.,

551 W. 35th St., New York, N.Y. '87 Renshaw , William E., Mgr., Cons. Gem Mine & Newton Cone. Wks.,

Idaho Springs, Colo. '00

*Renwick, Charles W., Asst. Genl. Mgr., Ducktown Sulp. Cop. I. Co.,

Isabella, Tenn. '02

*Requa, Mark L,, R.R. President, Mine Owner and Operator,

715 Hayward Bldg., San Francisco, Cal. '00 *Revell, George E., Min. Engr., Peterboro Hydraulic Power Co.,

Peterboro, Ont., Canada. '00 *Revebe, Joseph W., Min. Engr., Dominion Coal Co.,

Glace Bay, Cape Breton, Nova Scotia, '81 *Revett, Benjamin S., Cons. Engr. and Genl. Mgr., American Gold

Dredging Co., Breckenridge, Colo. '96

Members Axd Associates.

**Reynolds, Geoege B.j Min. and Alet. Engr., Care Imperial Ottoman

Bank, Bagdad, via Bombay. ’91

**Reynoli)S, Llewellyn la Independencia, 36, Mexico City, Mexico. ’02

*Rhodes, Chaeles, Metl. Engr., Genl. Mgr., N. Z. IMines Trust, Ltd.,

Shortland St., Auckland, New Zealand. ’98 Rhodes, Feancis B. F., Supt., National Plant, Amer. Sm. & Ref. Co.,

East-Side Station, Chicago, 111. 76

*Rice, Geoege S., Deputy Chief Engr , Rapid Transit R.R. Commission,

320 Broadway, New York, N. Y. ’86 *Eice, Geoege Samuel, Cons. Min. Engr. and Genl. ., Whitebreast

Fuel Co. of 111., 734 The Rookery Bldg., Chicago, 111. ’96 Rice, John, Vice-Pres. and Genl. Supt., Duerr Contracting Co.,

So. Bethlehem, Pa. ’92

Rice, John A Min. Engr., Copper Queen Con. M. Co., Douglas, Ariz. ’00

*Rice, John F S. A. A. Club, Spokane, Wash. ’00

Rich, Feancis a., Min. and Electrical Engr., Genl Mgr., Woodstock

G. M. Co., Karan gahake. New Zealand. ’94

fRiCH, Jacob M., Min. Engr 50 W. 38th St, New York, N. Y. ’83

*Rich, William, Min. Engr Trevu, Camborne, Cornwall, England. ’88

**RrcHABD, George A., Metl. Engr., Mt. Morgan G. M. Co., Ltd.,

Queensland, Australia. ’97

**Richaeds, Edgar, Chem 341 W. 88th St., New York, N. Y. ’79

Richards, Ellen H., Instructor in Sanitary Chem., Mass. Inst, of Tech.,

Boston, Mass. ’79

Richards, F. B., Chem M. A. Hanna, Cleveland, Ohio. ’90

*Richards, Heney P. 0. Box 108, Dover, N. J. ’77

*Richards, John T Salem House, Scorries, Cornwall, England. ’84

*Richards, John W., Assayer and Chem 1754 Champa St., Denver, Colo. ’91

*Richards, Robert H., Prof, of Min. Engr. & Met, Mass. Inst, of Tech.,

Boston, Mass. ’73

Richards, Thomas, Min. Engr., Supt., Nundydroog Co., Ltd.,

Oorgaum, Mysore, S. India. ’92

*Rtchards, W. J., Min. Engr Wilkes-Barre, Pa. ’90

Richmond, Albert B., Assayer, Patagonia Sampling Works,

Nogales, Ariz. ’01

Richmond, William H Richmond Hill, Scranton, Pa. ’87

**Eickard, Edgar, Cons. Min. Engr., El Progresso Mine,

Triunfo, Lower Cal., Mexico. ’96

Rickard, Forbes, Min. Engr ..508 Equitable Bldg., Denver, Colo. ’92

Rickard, Harold, Min. Engr., Care A. Chester Beatty,

523 McPhee Bldg., Denver, Colo. ’97 *Rick:ard, Richard D., Secy, and Treas , New York, Ontario & Western

Ry. Co., 56 Beaver St., New York, N. Y. ’80 Rickard, Thomas, Cons. Min. Engr. ‘The Poplars,” Cottenham Park,

.Wimbledon, London, S. W., England. ’85 **Rickaed, T. a., Min. Engr., Editor, JEngineei'ing and Mining Journal

261 Broadway, N. Y. ’88

*RrcKETTS, L. D., Min. Engr Bisbee, Ariz. ’92

*Ricketts, Dr. P. db P., Min. and Metl. Engr., Ricketts & Banks,

104 John St., New York, N. Y. ’73 bridge, H. Mackenzie, Min. Engr., Australian Metal Co.,

Broken Hill, New South Wales. ’99

Membeks Axd Associates.

*Bidgely, William B., Comptroller of Currency, Treasury Dept.,

Washington, D, C. ’80

Riebbl, Otto F., Mine Supt Spokane, Wash. ’92

Eiedt, Carlos, Genl. Mgr., Compahia Minera de Penoles,

, Mapimi, Durango, Mexico. ’99

Heixrich, Instructor in Econ. Geoh, Cornell Univ. ...Ithaca, Js. Y. ’95

Riggs, George M" Elliott & Co., 46 E. 29th St, Yew York, Y. Y. ’74

brighter, Th03IAsM., Coal Operator Mount Carmel, Pa. ’99

'Rigxey, Tho3ias P., Min. Engr 213 Dooly Bldg., Salt Lake City, Utah. ’96

Rilea", Le3YIS a , Pres., Lehigh Coal & Yavigation Co.,

222 Walnut St., Philadelphia, Pa. ’76 *Eiorday, Denis M., Mining Investigations, 224 Parrott Bldg.,

San Francisco, Cal. ’82

“Rioseco, Pedro P., Civ. Engr de Hidalgo Yo. 35, Pachuca, Mexico. ’98

tRiPLEY, Charles O 84 Johnson Ave., Yewark, Y. J. ’02

M4ISQUE, J. B 4021 Morgan St, St. Louis, Mo. ’83

*RissMAN]sr, Otto, Genl. Mgr Cherokee, Lanyon Spelter Co., Gas, Kansas. ’89

'-writer, George W., Secy, and Managing Engr., Eureka Hill M. Co.,

Eureka, Utah. ’99

fRix, Edward A., Mech. Engr., and Pres , Rix Compressed Air & Drill Co.,

396 Mission St., San Francisco, Cal. ’00 "Robbins, Charles P., Pres, and Mgr., Lone Pine-Surprise Cons. M. Co.,

57 Jamieson Bldg , Spokane, Wash. ’97

Robbins, Chester C Sumpter, Ore, ’02

Bobbins, Frank C., Min. Engr., J\Igr., Yorth Star M. Co. , Ltd.,

Kimberly, B. C., Canada. ’97

Bobbins, Percy A., Cons. Mech. & Elect. Engr., De Beers Cons. Mines,

Ltd., Kimberley, S. Africa. ’01 Robellaz, Fernand, Min. Engr.. .24 Rue Pierre Charron, Paris, France. ’98 Roberts, Cyrus Swan, Min. Engr., Montezuma Lead Co.,

Santa Barbara, Chihuahua, Mexico. ’01

*Ro BERTS, Edward J P. O. Box 1766, Spokane, Wash. ’02

Roberts, Eugene C., Genl. Supt , Fairmount Coal Co..New Bethlehem, Pa. ’88 Roberts, Frank C., Civil Engr., Real Estate Trust Co. Bldg.,

Philadelphia, Pa. ’87

'Roberts, George M., Met, Great Boulder Prop., Ltd.,

Kalgoorlie, Western Australia. ’92 ’Roberts, Harry, Mine Mgr., Hale, Kanawha & Roberts Mines,

Duluth, Minn. ’97

Roberts, J. C Gluck Bldg., Yiagara Falls, Y. Y. ’02

Roberts, John F. M., Metal. Engr Val Verde, near Prescott, Ariz. ’99

Roberts, Milnor, Prof, of Mining and Met , University Station,

Seattle, Wash, ’02

*Roberts, Percival, Jr 717 Arcade Bldg., Philadelphia, Pa. ’77

Robertson, Horace P., Min. Engr., P. O. Box 88,

Kalgoorlie, Western Australia. ’00 Robertson, James D., Min. Engr., Care H. L. Chase,

8 Y. Main St, St. Louis, Mo. ’86 fRoBEBTSON, James Leslie, Care E. H. Hunter & Co ,

No. 29 Harimamachi, Kobe, Japan. ’02

Robertson, Kenneth, Mgr Zenith Furnace Co., Duluth, Minn. ’82

Robertson, Philip W. K., Min. Engr, and Met,

Mazopil Cop. Co., Saltillo, Mexico. ’00

Members And Associates.

Robertson, WillixVm F., Prov. Mineralogist of B C , Dept, of Mines,

Victoria, B. C., Canada. ’81

Robeson, Anthony M., Cons. Mech. Engr., Care Eckstein & Co ,

P. O. Box 149, Johannesburg, Transvaal, So. Africa. ’93 Robins, Thomas, Jr., Pres., Robins Conveying Belt ('o.,

Park Row Bldg., New York, N. Y. ’92 Robinson, C. Snelling, Genl. Manager, Iron & Steel Dept., Colo. Fuel &

Iron Co., Boston Bldg., Denver, Colo. ’85 Robinson, Cyrus, Mech. Engr., Amer. Sm. & Ref. Co.,

71 Broadway, New York, N. Y. ’95

Robinson, George H., Min. Engr 328 Atlas BIk., Salt Lake City, Utah. ’86

Robinson, Sanford, Civil and Min. Engr Steeple Rock, New Mexico. ’90

*Robinson, Theodore W., 1st V. Brest, Illinois Steel Co.,

1035 The Rookery, Chicago, 111. ’84

*Roby, Luther A., Engr 745 Genesee Ave., Cleveland, Ohio. ’79

Rodda, Richard W., Mine Supt., Horse Shoe M. Co.,

Terry, Lawrence Co , So. Dak. ’97

Roderick, James E., Chief of Bureau of Mines Harrisburg, Pa. ’91

*Rodgers, Myron K., Consulting Engr , Yale Min. Co.,

Penticton, B. C., Canada. ’94 *Rodriguez, Juan C., Min. Engr., Apartado 87, Saltillo, Coahuila, Mexico. ’99 *Roe, James P., Mech. Engr., Supt, Iron Wks., Glasgow Iron Co.,

Pottstown, Pa. ’91

*Rochling, H., Met Yolklingen (bei Saar), Rhenish Prussia, Germany. ’97

*Roefper, C. W 133 Phil-Ellena St, Philadelphia, Pa. ’73

*Roeser, Frederick, Chem., Arkansas Valley Plant, Am. Sm. & Ref. Co.,

Leadville, Colo. ’94

Rogers, Allen H., Supt., Guggenheim Exploration Co.,

Villadama, Nuevo Leon, Mexico- ’92 Rogers, Charles E , Mgr., Frazer & Chalmers, Ltd., of London,

Kalgoorlie, Western Australia. ’97

Rogers, E. M Aspen Mines, Aspen, Colo. ’82

fRoGERS, John A Neosho, Mo. ’97

*Rolker, Charles M., 34 Leadenhall Bldg., 1 Leadenhall St,

London, E. C., England. ’74

*Roote, Gilbert X, Min. Engr. 233 Crocker Bldg., San Francisco, Cal. ’00

Robes, Leverett S., Min. Director Salesville, Mont. ’01

*Ropp, Alfred yon der, Met 121 Lake St., Oakland, Cal. ’01

*Rose, Prof. Carlton R., Prof, of Metallurgy, Colorado School of Mines,

Golden, Colo. ’02

*Rose, Hugh, Min. Engr., War Eagle Con. M. Co..Rossland, B. C, Canada. ’00 *Rose, William W., Dir., Cia. del Boleo, Santa Rosalia,

Baja California-Mexico. ’82

*Rosenfeld, Louis, Mine Owner 202 Sansome St, San Francisco, Cal. ’99

*Rosewarne, David D., Min Engr...Waikumete, Auckland, New Zealand. ’90

Ross, John, Jr , Supt Wildman Syndicate, Sutter Creek, CaL ’96

*Rossi, Auguste J., Cons, and Min. Engr.. .35 Broadway, New York, N. Y. ’92 *Rowand, Lewis G., Elect Engr. and Met, Wetherill Separating Co.,

Clover & Ferguson Sts., Newark, N. J. ’02

*BoyER, Frank W., Assayer 4001 West 35th Ave., Denver, Colo. ’00

*Ruetsohi, Rudolf, Cons. Engr., La Gran. Fund. Mex., Monterey, Mexico. ’91 fRuHL, John L. A., Roessler & Hasslacher Chem. Co.,

100 William St., New York, N. Y. ’98 F

Members Akb Associates.

fEtJNYOis, Walter C., Pres. The Stmthers Furnace Co.,

507 Perry-Payne Bldg., Cleveland, Ohio. ’92 *Kussel, Walter S., Vice-Pres., Genl. Mgr., Russel Wheel & Foundry Co.,

Detroit, Mich. ’86

Russell, A. J., Min. Engr Honda, Colombia, So. America. ’92

Russell, Edward H P. O. Box 496, Rew Haven, Conn. ’84

Russell, Murray, Min. Engr., Otago School of Alines,

Dunedin, New Zealand. ’00

Russell, Samuel W’'., Mine Owner Dead wood, So. Dak. ’01

*Russell, M’illtam, Chemist 38 Bellevue Crescent, Ayr, Scotland. ’02

Rutherford, Forest, Asst. Alet., Amer. Sm. & Ref. Co.,

Aguascalientes, Alexico. ’ 00

Ruttmaxx, FERDiXAJitD S 547 West 147 th St., NewYork,N.Y. ’81

*Ryah, Edwin P., Min. Engr., la Independence 36, Alexico City, Mexico. ’01 Ryder, Thos. J Apartado 307, Mexico City, Alexico. ’01

*Saddler, Valentine J., Railway Contractor, Baxter & Saddler,

422 Flinders Lane, Meibom ne, Victoria, Australia. ’93

*Sahlberg, August, Aline Mgr La Esperanza Mine, El Oro, Mexico. ’00

*Sahlin, Axel, Genl. Supt, Miilom & Askam Hematite Iron Co., Ltd.,

Alillom, Cumberland, England, ’91

Sakikawa, Motaro Care Shinitomo>office, Niihama, lyo, Japan. ’02

*Sales, Reno H., Min. Engr., Boston and Montana Cons. Copper &

Silver Alining Co., Box 1355, Butte, Alont. '02 Salom, Pedro G., Chemist, Pres., Electrical Lead Reduction Co.,

408 Bourse Bldg., Philadelphia, Pa. ’SO

Salsbury, AI. K , Pres Midland Coal Co., Box 1097, Pittsburg, Pa. ’90

*Samwell, Nicholas, Min. Engr., Care Inst. Mining & Met ,

Salisbury House, London Wall, London, E. C., England. ’01 fSANBORN, Edward H , Asst, to Pres., Consolidated Lake Superior Co.,

North American Bldg. , Philadelphia, Pa. ’91 *Sanborn, Francis N., Constructing Engr., Atlas Portland Cement Co.,

Hannibal, Alo. ’94

Sanborn, James F., Min. Engr 286 N. Broad St., Elizabeth, N. J. ’99

*Sandberg, C. P., Cons. Engr., Palace Chambers, Westminster,

London, England. ’SI

ISanders, Alfred D., Min. Engr., Central Provinces Prospecting-

Syndicate, Balagbat Manganese Mines, Central Provinces, India. ’97 *Sanders, John D., Asst. Mgr. Detroit WLs. Solvay Process Co.,

Detroit, Mich. ’79

Sanders, R. H., Alin. Engr 603 Drexel Bldg., Philadelphia, Pa. ’76

ANDERS, Wilbur E., Min. Engr Butte, Mont. ’85

Sanderson, Henry S., Min. Engr 1824 Curtis St, Denver, Colo. ’01

*Sandifeb, Harmee C., Mine Mgr Silas, Guanajuato, Alexico. ’00

tSANDOVAL, Aurelio, Banker Nogales, Ariz. ’02

t S andoval, Prospbro, Banker Nogales, Ariz. ’02

Sargent, George W., Chem. and Met, Carpenter Steel Co.. .Reading, Pa. ’99

Sargent, William D 170 Broadway, New York, N. Y. ’96

Sauer, j. W., Alin. Engr .Evansville, 111. ’97

-Saunders, William E., The United Gas Imp. Co. , Broad & Arch Sts.,

Phila., Pa. ’89

Sauveur, Albert, Asst. Prof, of Met., Harvard Univ.,

Mgr., Boston Testing Lab., 446 Tremont St., Boston, Alass. ’92

Members Akd Associates.

*Savage, xiRTHUB E., Mgr., Cockle Creek Wks., etc.,

Cockle Creek, Xew Sooth Wales.

Sawebs, William D., Chem. and Met.,

1 Athol Garden Place, Glasgow, Scotland.

*Saxmax, Edwin F., Supt Derry Coal & Coke Co., Latrohe, Pa.

*Saybe, Hal, Min. Engr 815 Logan Are., Denver, Colo.

fScAiFE, Charles C 119 1st Are., Pittsburg, Pa.

ScAiFE, James V Pittsburg, Pa.

SciLiFE, Marvin F Morganton, K. C.

*ScAiPE, Oliver P P. O. Box 974, Pittsburg, Pa.

**ScAiFE, William B Structural Iron Wks., Oakmont, Pa.

**ScAiFE, William L., Chairman Scaife Foundry and

Machine Co., Ltd., 28th St., Pittsburg, Pa.

fScALLON, William Butte, Mont.

’Scarborough, Frs. W Ches. and Ohio E.E., Richmond, Va.

tfScHAFPER, Dr. Charles, Physician 1309 Arch St, Philadelphia, Pa.

‘ScHAUP, Charles E., Min. Engr Tiffin, Ohio.

*ScHEiDEL, Dr. a., Chem Union Club, Sydney, New South Wales.

*ScHELLENBERG, Francis Z., Cons. Engr 5746 Howe St., Pittsburg, Pa.

*ScHiECHEL, Fredk. .-V. M., Min Engr., 134 Mainzerlandstrasse,

Frank£ort-on-Main, Germany, *ScHiERTZ, Ferdinand A., Met Guadaloupe y Calvo, Chihuahua, Mexico. *'ScHLAPP, Herman H., Cons. Min. Engr. and Met.,

163 William St., Melbourne, Victoria, Australia. Schlemm, William H., Supt San Luis Mining Co.,

Panuco de Coronado, Durango, Mexico. tScHLESiNGER, FERDINAND, Dunn Iron M. Co.,

23 University Bldg., Milwaukee, Wis. *SuHMiTZ, Emerich J., Cons. Engr.. ..154 Alexander Ave., New York,N. Y. **ScHNEiDER, Albert F., Cons. Metl. and Min. Engr.,

77 Pine St., New York, N. Y.

*ScHNiEWiND, Dr. F. W. C., Chem. Engr. , United Coke & Gas Co.,

277 Broadway, New York, N. Y.

Schnitzel, Henry, Chem Lead, So. Dak.

*ScHOLZ, Carl, Mgr 307 E. Eighth St., Little Rock, Ark.

*ScHORE, Robert, Mech. Engr Shannon Copper Co., Clifton, Ariz.

*ScHRAUBSTADTER, R. T 201 Security Bldg., St. Louis, Mo.

*Schroedter, E., Civil Engr Jacobstrasse 5, Diisseldorf, Germany.

fScHROPP, Abraham S 107 Market St, Bethlehem, Pa.

*ScHULTZE, John S., Min. Engr 59 Wall St, New York, N Y.

*ScHULZE, Hermann Otto, Prof, of Metallurgy, School of Mines., Rolla, Mo.

Schumacher, A. J., Met Care G. W. French Dillon, Melrose, Mont.

*ScHWAB, Charles M., Pres Carnegie Steel Co., Pittsburg, Pa.

*Schwab, Joseph E,, Furnace Supt 71 Broadway, New York, N. Y.

Schwarz, Charles E., Min. Eng Desloge, St Francois Co., Mo.

Schwarz, Theodore E., Min. Engr... .1026 Seventeenth St., Denver, Colo. *ScHWERiN, Clarence M., Genl. Inspector, Care Griffin Wheel Co ,

Sacramento Square, Chicago, 111. *ScoTT, Christian C. A., Min. Engr., Bowes, Scott & Co., 2 Birchen Lane,

London, E. C., England.

ScoTT, Dunbar D., Supt Phoenix Cons. Cop. Co.’s Mines, Phoenix, Mich.

ScoTT, Frederick B., Min. Engr. ...3 Birchen Lane, London, E. C., England.

’91

’95

’96

’89

’86

’01

’90

’78

’01

’79

’90

’02

’92

’00

’93

’79

’02

’97

’96

’82

’90

’83

’74

’02

’00

’96

’01

’94

’91

’86

’97

’02

’89

’91

’98

’02

’76

’01

’97

’98

’91

Members Axd Associates.

ScoTT, Herbert Kilberx, Cons. Min. Engr , Clive House, Surry St.,

Strand, London, England.

*ScoTT, James, Supt., Blast Furnace, Lucy Furnaces, Carnegie Steel Co.,

51st St., Pittsburg, Pa.

*ScoTT, Robert J., Met Carnegie Steel Co., Pittsburg, Pa.

*ScOTT, William G-., Mine Owner Soulsbyville, Tuolumne Co., Cal.

*ScoTT, Wixfield G., Chem 1109 Park Ave., Racine, Wis.

ScoTT, W. J., Supt., Dupont Powder Co.,

85 S. Franklin St., Wilkes-Barre, Pa. *ScowDEN, Leo A., Mine Mgr., Ferris-Haggarty Cop. M. Co ,

Rudefeha, Carbon Co., Wyoming.

Scranton, William W Scranton, Pa.

*ScRUTTOX, Lindsay, Min. Engr 918 Hayward Bldg , San Francisco, Cal.

*Seal, Albert E., Min. Engr 19 All Saints St., Nottingham, England.

**Seale, Herbert P Mount Morgan Mine, Queensland, Australia.

**Seaman, Henry B., Civ. Engr 40 Wall St., New York, N. Y.

Seaman, H. J., Genl. Supt Atlas Portland Cement Co., Northampton, Pa. *Seamon, Fbank H., Min. Engr., Assay er and Chem., Seamon Assay Co.,

El Paso, Texas.

Seamon, William H., Min. Engr. and Mgr., Las Adargus Min. Co.,

142 Wyoming St., El Paso, Texas.

*Searlis, Dennis, Chem 101 Sansome St., San Francisco, Cal.

*Searles, Linn Walker Barren Springs, Va.

*Sebenius, j. Uno 523 Lyceum Bldg., Duluth, Minn.

Seccombe, Alfred F., Mine Supt.,

44 Hill Park Crescent, Plymouth, England. *Seddon, Richard J., Mine Agent,

Ministers Office, Wellington, New Zealand. *See, Raymond, Min. and Electrical Engr..

9 Place des Temes, Paris, France.

*Seeber, Rex R., Min. Engr Painesdale (via Houghton), Mich.

fSEEGER, Ludwig, Mgr., Amer. Metal Co., Ltd.,

52 Broadway, New York, N. Y.

*Selby, Prentiss, Assayer Selby Sm. & Lead Co., Selby, Cal.

*Self, Edward D., Cons. Min. Engr., Mgr., San Carlos Cop. Co.,

Linares, Nuevo Leon, Mexico. **Seligman, Albert J., Banker, Seligman & Meyer,

66 W. 52d St., New York, N. Y.

Selkirk, William, Cons. Min. Engr.,

Post Office Bldg., Middleborough, England. ISessinghaus, Gustatus, Min. Engr... 507 Continental Bldg., Denver, Colo.

Settle, Joseph B., M. Engr 4 Coleman St., London, E. C., England.

*Setz, Gustav, Asst. Supt St. Joseph Lead Co , Bonne Terre, Mo.

*Shaffeb, Edward L., Min. Engr Cripple Creek, Colo.

*Shapfer, Wm. L., Assayer Idaho Springs, Colo.

*Shallceoss, Vincent F., Min. Engr., Mgr. Australian Mining & Gold

Recovery Co., Ltd., P. 0. Box 92, Kalgoorlie, Western Australia.

*Shanahan Cornelius M Low Moor, Allegheny Co., Va.

Sharp, Charles C., Genl. Supt. Boomer Coal & Coke Co., Boomer, W. Va.

*Sharp, William G., Min. Engr 1 Broadway, New York, N. Y.

*Shaep, W. Goodenough, Care F. Danvers Power, P. 0. Box 464,

Sydney, New South Wales.

’90

’90

’99

’00

’94

’00

’75

’99

’01

’01

’89

’82

’95

’90

’00

’02

’90

’92

’88

’00

’02

’00

’00

’96

’82

’00

’98

’02

’77

’99

’02

’99

’95

’94

’91

’95

Members Ani) Associates.

*Shaepe, Albert J,, , Engr., Redfearn, Sharpe & Co.,

Oaxaca, Oaxaca, Mexico. 01

Shabples, Stephen P., Chem. and Assayer. 26 Broad St., Boston, Mass. 78

*Sharpless, Fred. F., Min. Engr; Westbury Station, Nassau Co., N. Y. '89

*Sharwood, WilliAxM J., Met Mont.M. Co., Ltd., Marysville, Mont. ’01

'Shaw, Richard C., G-enl. Mgr., Thayer M. & M. Co., Miramar, Costa

Rica, Central America (via New Orleans). '97

*Shaw, William T., Metl. Chem 223 3d St., North, Seattle, Wash. '97

*Sheaee, Harry J., Min. Engr.. Room 700, 111 5th Ave., New York, N.Y. '02

*Sheafer, Arthur W., Min. Engr. and Geol Pottsville, Pa. '80

Sheafer, W. Lesley, Real Estate & Mining Properties Pottsville, Pa. ’81

*Shedd, Prof. S., Teacher of Geol. & Mineralogy, Wash. Agric. College,

Pullman, Wash. '01

*Shepard, Edward M., Prof, of GeoL, & V. Pres. Board of . Mo.

Geol. Survey, Drury College, 1403 Benton Ave., Springfield, Mo. '94 *Shepard, Frank E., Mech. Engr., Pres., Denver Engineering Wks.,

604 McPhee Bldg., Denver, Colo. '96 *Sherrerd, Alexander H., Metl. Engr., Taylor Iron & Steel Co.,

High Bridge, N. J. '75

Sherrebd, John M., Min. Engr., Genl. Sales Agt., Taylor Iron & Steel Co.,

High Bridge, N. J. '80

Shields, Henry B., Mgr Girard Iron Co., Girard, Ohio. '97

*Shimer, Porter W., Chem. and Met Easton, Pa. '79

*Shipman, H. a., Mgr Stratton’s Independence, Ltd., Victor, Colo. ’99

*Shiras, W. McGilvray, Asst. Ore Agent, Carnegie Co.,

715 College Ave., E. E., Pittsburg, Pa. '02 Shirley, Frederick S. , Mine Mgr., Glen Almond Mica Mine,

Buckingham, Quebec, Canada. ’02 *Shockley, Joseph H., Mine Supt Four Metals M. Co., Telluride, Colo. '00 *Shockley, William H., Min. Engr., Bewick, Moreing & Co. ,

Broad St. House, New Broad St. , London, England. '83 *Shook, a. M., 2d V. Pres...Tenn. Coal, Iron & R.R. Co., Birmingham, Ala. ’86

*Shook, James W., Supt Ensley Furnace, Ensley, Ala. ’00

*Short, Frank R., Min. Engr., Langlaate Deep Mine,

Johannesburg, So. Africa. ’99

*Sheivee, Henry, Mine Supt Union M. Co., Mt. Savage, Md. ’00

*Shrom, Harry L., Mine Supt Miami M. Co., Concord, N. C. ’01

*vSiDERFiN, William C., Assayer, Colusa Parrot M. & Sm. Co., Butte, Mont. ’91

**Stebert, Frederic J., Min. Engr.. Butler, Nve Co., Nev. ’02

SiLLiMAN, Arthur P-, Min Engr. and Chem Hibbing, Minn. ’98

SiMONDS, Ernest H., Assayer and Anal. Chem.,

417 Montgomery St., San Francisco, Cal. ’95 *SiMONDS, Francis M., Min. Engr., Simonds & Wainwright,

159 Front St., New York, N. Y. ’88

*SiMPSON, 0. D., Coal Operator Scranton, Pa. ’85

*SiMPSON, E. S. , Government Assayer and Mineralogist,

Gov. Assay Office, Perth, Western Australia. ’98 *SiMPSON, Gilbert C., Assayer and Chemist,

Santa Maria del Oro, Durango, Mexico. ’02

*SiMPSON, H. R., Mgr Amer. Sm. & Ref. Co., Aguascalientes, Mexico. ’00

*SiMPSON, J. C 40 Greenhill Gardens, Edinburgh, Scotland. ’87

*SrMS, H. N., Mgr Sun & Moon M. & M. Co., Idaho Springs, Colo. ’83

IxXXYi

Members And Associates.

SiMS, William J., Assayer la Industria 15, Mexico City, Mexico. ’02

*SrMS, William L The Maxim Co., Birmingham, Ala. ’01

*SiMSON, Augustus, Min. & Com. Agent, A. & L. Simson,

Patterson St., Launceston, Tasmania. ’97

*SiXGEB, George, Min. Engr Hotel Kenmawe, East End, Pittsburg, Pa. ’85

*SrxGEB, William H 934 Western Ave., Allegheny, Pa. ’73

Alphonse, Min. Engr Bienne, Switzerland. ’00

SisTERMANS, Francis H., Supt. Mines, Tepeza]anas..Tepezala, A. C., Mexico. ’94

SiZEE, Frank L., Mgr Posario Mines, Ltd., Guadalupe y Calvo, Mexico. ’00

Sjogren, Abtid Avesta, Sweden. ’01

'*Sjogben, Hjalmae, Prof, of Mineral Dept, of N. H. Museum, Academy

of Science, Stockholm, Sweden. ’91 Sjostedt, Ernst A., Chief Met., Lake Superior Power Co.,

Sault Ste. Marie, Ont., Canada. ’93

Skelding, Joseph F., Supt , Blast Furnaces Middlesboro, Ky. ’91

*Skewes, Edward, Min. Engr Eosewarne, Hasyle, Cornwall, England. ’95

Skifp, F. J- V., Field Columbian Museum Chicago, III. ’93

*Skinner, BLarry R.j Genl. Mgr., Durban Eoodepoort G. M. Co.,

P. 0. Box 111, Eoodepoort, S. Africa. ’97

Skinner, John C., Genl. Supt Western Chem. Mfg. Co., Denver, Colo. ’02

Skinner, Orville C., Supt. 0. H. Depts., Standard S. Wks.,

P. O. Box 165, Burnham, Pa, ’98 *Slater, Amos, Min. Engr, Asst. Geol., Colorado Fuel & Iron Co.,

1657 Marion St., Denver, Colo. ’01

Slavens, John H., Assayer x4.nier. Sm. & Eef. Co., Argentine, Kan. ’01

*Sloan, Charles E. , Min. Engr. & Assayer,

Care Louis Falkenan, 538 Sacramento St., San Francisco, Cal. ’02 Slocum, Frank L., Chem., Min. & Mech. Engr., V. Pres. & Genl Mgr.,

Miami M. Co., 401 S. Linden Ave., E. E., Pittsburg, Pa. ’96

*Small, Edward C., Min. Engr 4596 Oakenwald Ave., Chicago, 111. ’01

Small, George W., Min. Engr. and Met Visalia. Cal. ’85

*Small, Warren NT., Genl. Mgr., El Paso Foundry & Machine Co.,

El Paso, Texas. ’00

Smedley, Alfred, Chief Engr National Transit Co , Oil City, Pa. ’96

fSMiNK, Frank C., President Reading Iron Co., Beading, Pa. ’92

Smit, Egbert, Min. Engr Apartado 46, Guanajuato, Mexico. ’02

*Smith, Albert W., Prof, of Metallurgy, School of Applied Science,

Cleveland, Ohio. ’97

*Smith, Alfred M., Prof, of Chem. & Met., School of Mines,

Ballarat, Victoria, Australia. ’00

-{Smith, A. Parker, Counsellor-at-Law 45 Broadway, New York, N. Y. ’90

tSMiTH, Clement G., Iron Business 340 Locust St., Steelton, Pa. ’92

Smith, E. Percy, Min. Engr., Tombstone Cons. M. Co., Ltd.,

Tombstone, Ariz. ’02

*Sm:ith, Frank C., Min. Engr 159 La Salle St., Chicago, 111. ’84

*Smith, Frank M., Asst. Mgr., Amer. Sm. & Ref. Co., East Helena, Mont ’92

*Smith, Frederick D., Cons. Min. Engr Sumpter, Ore. ’01

**Smith, George P. 0. Box 752, Sydney, New South Wales. ’92

**Smith, George Otis, Geol XJ. S. Geol. Survey, Washington, D. C. ’02

*Smith, Harry E.,Chem L. S. & M. S. Ry., Collinwood, Ohio. ’91

*Smith, Hoval a., Min. Engr Bisbee, Ariz. ’02

*Smith, Howard D., Min. Engr South Berkeley, Cal. ’02

Members And Associates.

Smith, J. Bexxett, Min. Engr Kingston, Pa. 91

Smith, J. B. Audley, Ohem. and Assayer Weiser, Idaho. '93

Smith, John P., Cons. Min. Engr., New Zealand Insurance Bldg.,

1 CrawTord St., Dunedin, New Zealand. '97

Smith, j. Asst. Genl. Mgr Solvay Process Co , Syracuse, N. Y. '81

Smith, Noah B South Chicago Furnace Co., Irondale, Chicago, 111. '86

"Smith, Oberlin, Mech. Engr., Pres., Ferracnte Machine Co.. Bridgeton, N. J. '84 "Smith, Percy B., Min. Mgr., Mysore 'West. & Mysore Wynadd G. M. Co.,

Oorgaum, S. India. '95

*Smith, E. Nete, Civil and ]Min. Engr., The University, Hobart, Tasmania. '97

Smith, S. Kodmond ..Dupont Eoad, Eismere, Del. '96

*Smith, T. Guileord, '7ice-Pres., N. Y. Car Wheel Wks.,

9 German Insurance Bldg., Buffalo, N. Y. '71

*Smith, Thorn, Chemist Isabella, Tenn. '02

*Smith, William A., Chera El Paso Sm. Wks., El Paso, Texas. '98

**Smock:, John C., Geol Trenton, N. J. '73

*Sivn:TH, Charles H., Jr., Prof, of Geol. and Mineralogy, Hamilton College,

Clinton, N.Y. '87

*Smyth, Henry Lloyd, Prof, of Mining and Met., Harvard Univ.,

9 Buckingham St., Cambridge, Mass. '90

*Snedaker, James A., Min. Engr. 722 Equitable Bldg., Denver, Colo. '99

*Snell, Henry V., Mine Engr., Old Dominion Cop. M. & Sm. Co.,

Globe, Ariz. '00

Snoyer, George E., Min. Engr. and Met., San Juancito, Honduras,

Central America (via New Orleans & Puerto Cortez). '01 *Snow, Charles H., Civil and IMin. Engr., Dean School of Applied

Science, New York Univ., University Heights, New York, N.Y. '91 *Snyder, Frederics: T., Metl. Engr , F. T. Snyder & Co.,

324 Dearborn St., Chicago, 111. '99

Somers, George E., Pres., Bridgeport Brass Co., 365 Washington Ave.,

Bridgeport, Conn. '95

**SoNNEMANN, George A., Cons. Min. Engr., Genl. Mgr., South Mt. Cons.

Mines Tunnel Co., etc., 430 ‘The Rookery," Spokane, Wash. '91 *SoNNTAG, Julian, Mgr., Grant Powder Co., Ltd., 204 Hayward Bldg.,

San Francisco, Cal. '99

SouDER, Harrison, Civil and Min. Engr Johnstown, Pa. '00

Souther, Henry, Cons. Engr 440 Capitol Ave., Hartford, Conn. '95

fSowERS, Dr. Zachariah T 1320 New York Avenue, Washington, D. C. '98

*Speer, j. Eamsey 331 Fourth Ave , Pittsburg, Pa. '96

*Spence, George, Mining, Apartado 561, Calle Gante 8,

Mexico City, Mexico. '02

**Spencer, Arthur C 1330 F St., Washington, D. C. '01

**Sperr, Frederick W., Prof, of Civil and Min. Engr., Mich. College

of Mines, Houghton, Mich. '82

*Sperry, Edwin A., Min. Engr.. Biwabik, Minn. '89

*SPBRRy, Erwin S., Metallurgist.. 260 John St., Bridgeport, Conn. '94

*Sperry, Francis L., Met Tallmadge, Ohio. '89

*Sperry, Jacob J., Civil and Min. Engr., Sperry Coal & Coke Co.,

Welch, W. Va. '00

*Spiers, James, Jr., Mech. Engr., Genl. Mgr., Fulton Engineering & Ship

Building Wks., Harbor View, San Francisco, Cal. '94 *Spies, Albert, Editor... Magazine 3 W. 29th St., New York, N.Y. '81

Members And Associates.

Spilsbury, E. Gybbox 45 Broadway, New York, N. Y.

Spotswoob, Georoe McL.j Ohem. and Met., La Leonesa Mines, Matagalpa,

Nicaragua, Central America.

**Spurr, Josiah E., Mn. Geol U. S. Geol. Survey, Washington, B. C.

fS<iUiEB, Charles B 135 Broadway, New York, N. Y.

Squire, Joseph, Min. Engr., Southern Ry. Co., Fourth St , Helena,

Shelby Co., Ala.

*SrACKPOLE, Morrill D., Min. Engr., Cyanide Recovery Co.,

418 Dooley Blk., Salt Lake City, Utah. Stackpoolr, Adam R., Chem. and Met., Sheba Gold Min. Co.,

Eureka City, Transvaal, So. Africa.

*Stackpoole, Stephen W., Civil and Mm. Engr., 3d Ave. de la Libertad

No. 5, Orizaba, Vera Cruz, Mexico.

Stabelmaxx, G Chareas, San Luis Potosi, Mexico.

*Stabler, Louis Andrew, Min. Engr P. O. Box 1416, Butte, Mont.

*Stafford, C. Edward, Mgr Tidewater Steel Co., Chester, Pa.

fSTALNAKER, RANDOLPH, Agent B. & O. R.R. Co., Wheeling, W. Va.

Stanford, H. R., Civil Engr., U. S. Navy... Navy Yard, Mare Island, Cal. *Stanford, Richard B., Min. Engr., Supt. of Mining Cos,, Columbia, Cal. Stanley, James, Mine Mgr., Mt. Ida Consols., Ltd.,

73 Pembroke Road, Dublin, Ireland.

Stanley, Robert C., Min. Engr 26 Clinton Ave., Montclair, N. J.

**Stansfield, Alfred, Prof, of Met McGill Univ., Montreal, Can.

*STANTrAL, Otis T., Supt, III. Malleable Iron Co., 515 Diversey Ave.,

Chicago, 111.

**Stanton, Frank; McM., Min Engr., Atlantic Mine., Houghton Co., Mich.

fSTANTON, John, Pres., Cop. M. Cos 11 William St., New York, N. Y,

*Stanton, John R., Pres., Phoenix Cons. Cop. Co., etc.,

11 William St., New York, N. Y.

Stanton, Robert B., Civil and Min. Engr., Supt., Hoskaninni Co.,

Sewickley, Pa.

*Stanton, William A., Mfr Lewis Blk., Pittsburg, Pa.

*Stark, Herbert S., Min. Engr., Genl. Mgr., Crown Reef G. M. Co., Crown Reef, P. O Box 1081, Johannesburg, Transvaal, S. Africa.

Starkweather, Herbert, Mining Silverton, Colo.

*SrARR, James, Care G. B. Newton & Co., North American Bldg.,

Philadelphia, Pa.

*Staunton, William F., Supt., Met., Congress Gold Mines Co.,

Congress, Ariz.

*STAyER, William H., Mine Mgr.,

Box 336, Guayaquil, Ecuador, So. America. *Stead, John E., Met. Chem., 11 Queens Terrace, Middlesborough, England. Stearns, Irvino A., Pres., Coxe Bros. & Co., Inc., and D. S. & S. R.R.,

143 Liberty St., New York, N. Y. Stearns, Thomas B., Min. and Mech. Engr.,

1720 California St., Denver, Colo,

*Steese, Rollin C., Supt., Blast Furnaces,

Brier Hill Iron & Coal Co., Youngstown, Ohio.

*Stehman, John V. R, Chemist Birdsboro, Pa.

*Steiger, George, Chem U. S. Geological Survey, Washington, D. C.

*Stein, Walter M., MetL Engr Stein & Boericke, Ltd., Primos, Pa,

*Stephbn, Alfred E., Anal. Chem., Care The Pacific Islands Co., Ltd.,

Macquaire Place, Sydney, New South Wales.

’97

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’86

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’98

’96

’02

’02

’74

’95

’94

’02

’98

’02

’02

’00

’89

’77

’99

’92

’96

’97

’94

’93

’83

’02

’98

’89

’97

’01

’95

’88

’02

Members A.'Nd Associates.

*Stephexs, Feaxcis B., Dir., Cassilis G. M. Co.,

Gongio, West-Gippsland, Victoria, Australia.

Steeling, Eobeet Wardner, Idaho.

*Steen, Hexey 50 Broadway, New York, N. Y.

*Stevens, Hexey W., ]Mine Mgr Morristown, Ariz.

*Steyenson, a. a., Asst. Supt. , Standard Steel Wks..Biirnham, Mifflin Co., Pa.

*Stevexsox, Johx, Je., Vice-Pres Sharon Steel Co., Sharon, Pa.

Stevexsox, Lewis G., Care Pinos Altos G. M. Co.,

1421 Clayton Ave., Denver, Colo.

*STEyExsox, Egbert, Civil and Min. Engr., Care Secy. A. I. M. E.,

99 John St, New York, N. Y.

*Stewaet, Alexaxbee, Civil Engr., Broken Hill Prop. Co ,

320 Collins St., Melbourne, Australia.

Stewart, Aethtje J., Mine Supt Tecalitlan, Jalisco, Mexico.

*Stewart, Howard E Anaconda Cop. Co., Anaconda, Mont

Stewart, P. Charteris A, Asst. Supt. of London Oil Trust, Ltd.,

51 Eedclifie Square, South Kensington, London.

Sticht, Ernest, Assayer Republic, Wash.

*STicnT, Egbert C., Genl. Mgr. , Mt. Lyell M. & Ey. Co., Ltd.,

Queenstown, Tasmania.

*Stick:ney, C. Wade, Min. Engr. and Met., Red Star Min. Co., Seattle, Wash. *Stiles, Thomas W., Hniversity Club, 5th Ave. and 57th St.,

New York, N. Y.

Stocker, James M., Mine Supt Torres, Sonora, Mexico.

*Stockett, Capt. Alfred W., S. Neumann & Co.,

P, 0. Box 485, Johannesburg, Transvaal, So. Africa. *Stockett, Lewis, Mgr., Coal Properties Great Northern Ry.,

Stockett, Mont

*Stoddart, Augustus W., Mine Mgr.,

11 Abchurch Lane, London, E. C., England

Stoek, Harry H., Editor Mines and Minerals Scranton, Pa.

*Stoiber, Edward G., Mn. Engr 1712 Sherman Ave., Denver, Colo.

*Stoiber, Gustavus H., Box 22, Silverton, Colo., & 41 W. 49th St.,

New York, N. Y.

fSTOiBER, Lexa a., Mine Owner and Mgr..l7 12 Sherman Ave., Denver, Colo.

*Stokes, Hexry N., Chem U. S. Geol. Survey, Washington, D. 0.

Stoxe, George C., Chief Engr , N. J. Zinc Co.,

11 Broadway, New York, N. Y.

*Stoxe, William A., Mine Machinery Mfr Galena, Kansas.

*Stoxestreet, George D., Mine Inspector, Krugersdorp,

Transvaal, So. Africa.

Storms, William H., Min. Engr. and Geol Sutter Creek, Cal.

*Storrow, Samuel, Min & Civil Engr..402 Douglas Bldg., Los Angeles, Cal.

*Storrs, Lucius S., Geol Northern Pacific Ry., St. Paul, Minn.

*Stoughtox, Bradley, Cons. Metallurgist, Instructor in Metallurgy,

Columbia University, New York, N. Y.

Stoutz, Edmoxd de 11 Eue de Hotel de Ville, Geneva, Switzerland.

*Stow, Audley H., Civil and Min. Engr. Hunter, W. Va.

*Stower, James N., Genl. Mgr., Chateaugay Ore & I. Co.,

Plattsburg, N. Y.

Strauss, Lester W., Min. Engr., Box 304, Globe, Ariz.,

798 Lexington Ave., New York, N. Y.

’01

’02

’01

’02

’89

’76

’00

’89

’96

’00

’97

’01

’85

’85

’91

’99

’97

’99

’81

’97

’88

’77

’02

’94

’01

’80

’99

’88

’94

’99

’00

’97

’00

’94

’02

’00

Members And Associates.

Street, Gerald B., Min. !Met- Engr., 504 Dooly Block,

Salt Lake City, Utah. ’02

Strieby, William, Prof, of Mining, S05 North Cascade Ave.,

Colorado Springs, Colo. ’77

Strobed, Victor 0., Genl Mgr., Crane Dept., Niles Bement Pond Co.,

Mifflin & Meadow Sts., Philadelphia, Pa. ’84 Steout, Ebne.‘'T a.. Min. Engr., Care Centre Star Mine,

Rosland, B. C., Canada. ’02

STErTHEEs, .Joseph, Editor Mineral Indvtry,

261 Broadway, New York, N. Y. ’88

"Stubbs, Frederic Address wanted. ’93

AStumm, Gey C, Asst. Mgr., Seaton Alt. Electric Light, Heat & Povver Co.,

Idaho Springs, Colo. ’01

Stitrgis, Edward B., Alin. Engr 307 E. 17th St, New York, N. Y. ’99

*SuLLiVAN, Allan, Civil & Alin. Engr. & Company Algr. , Elizabeth Aline,

Port Arthur. Ont., Canada, ’02

*SrMMBRS, Bertrand S., Inventor, AlcCormick Harvesting Alachine Co.,

Chicago, 111. ’94

Sutcliffe, John, Civil, Alin, and Alech, Engr.,

Alansion Square, Poughkeepsie, N. Y. ’87 *Sutherland, Franklin T., Aline Over and Algr.,

232 Laughlin Bldg., Los Angeles, Cal, ’99' *Sutherland, J. IV., Genl. Algr., Golden Horseshoe Est. Co., Ltd., etc.,

Boulder, Western Australia. ’92 SuTHERLAND, AV. J., Attorney-at-Law...68 William St , New York, N. Y. ’99 *Sutton, AVilliam J., GeoL , E. & N. Railway Co...Alctoria, B. C , Canada. ’00'

SwAiN, S. R., Alin. Engr P. 0. Box 722, El Paso, Tex. ’02

SwAN, Robert AI. AA., Min. Engr., The Alalaysian Co,, Ltd.,

Singapore, Malay Peninsula. ’00 *Swart, Walter G., Assayer and Chem., Blake AI. & AI. Co.,

1752 Curtis St., Denver, Colo. ’99 Sweet, Heioiy N., Patent Expert, Duncan Hall, 1161 Chapel St,

New Haven, Conn. ’91

*SwEET, Thomas G., Aline Algr Broken Hill, New South AVales. ’99’

*SwEETSEB, Ralph H., Algr., Blast Fur., Cranberry Fur. Co.,

Johnson City, Tenn. ’94

SwiFT, George D., Mine Supt 2320 E. 1st St., Duluth, Minn. ’93

*Symmes, Oliver R., Supt. and Genl. Mgr., Lone Oak G. M. Co.,

Grantville, Ga. ’00'

*SzONTAGH, Dr. Oscar, Alin. Engr., Care Louis Falkenau,

538 Sacramento St., San Francisco, Cal. ’89-

VTaft, Harry H., Alin. Engr. and Chem., 278-80 Lincoln Ave.,

Denver, Colo. ’88

Takeda, Kyosaktj, Min. Engr., Chief. Engr., Kosaka Mine,

Dojima, Osaka, Japan. ’97

Talbot, Benjaiviin, Met. Engr., Talbot Continuous Steel Process, Ltd.,

Westminster Chambers, East Parade, Leeds, England. ’94

*Tamm, Eric, Chem Ramnas, Sweden. ’99

*Tarleton, Robert M., Min. Engr 114 E. 71st, New York, N. Y. ’00

*Tarnava, Constantino de, Mgr , Monterey Steel Co.,

P. 0. Box 20, Monterey, Mexico. ’02

Members Akb Associates.

Taewater. James F., Contractor & Miner of Iron Ores-Eoclnrood, Tenn. ’96

*Taiiwateb, Poi-K, Genl. Mgr Ore Mines Brown M. Co., Cardiff, Tenn. ’OO

Tattjm, Lawrence W., Consulting Min. Engr. and Met.,

424 K. Y. Life Bldg., Chicago, 111. ’89 **Taylok, Albert W., Mine Supt., Oriental Cons. M. Co.,

Moon San District, North Pyengang Province, Korea. ’00 *Tayloe, Arthur, Mine Mgr., Bellevue Prop. Mine, Mount Sir Samuel,

via Lawler?, Western Australia. ’98

*Tatloe, Frank A Gwinmine, Calaveras Co., Cal. ’01

Taylor, F. M 214 Boston Bldg , Denver, Colo. ’01

*TayloRj Federico W. , Chena., Xegociacxon Minera La Victoria y Anexas,

Apartado 217, San Luis Potosi, Mexico. ’81 *Tayeob, George B., Mgr , Robeson ia Iron Co, Ltd.,

Robeson ia, Berks Co., Pa. ’92

*Taylor, James, Cons. Engr,, Cbem., Met., 6 Bligh Chambers,

Bligh Street, Sydney, New South Wales. ’98

*Taylor, Joseph J., Min Engr Chico, Butte Co., Cal. ’90

*Taylor, Knox, Genl. Mgr., Phila. & Idaho Co Bound Brook, N. J. ’97

*Taylor, Lewis H., Jr., Mine Investor, 1508 Land Title Bldg.,

Philadelphia, Pa. ’99

**Taylor, Percyvaee, Min. Engr., 21 Victoria Road,

Kensington, London, W., England. ’81 *Taylob, William H., Mgr. & Pres., Anthracite Coal Cos.,

131 Wyoming Ave., Scranton, Pa. ’87 Taylor, W. J., Iron and Steel Mfr., Taylor Iron & Steel Co.,

Hugh Bridge, N. J. ’75

*Taylor, William W., Supt., Blast Furnace, Alleghany Iron & Steel Co.,

Iron Gate, Va. ’97

*Tays, Eugene a. H., Cons. Min. Engr Puerte, Sinaloa, Mexico. ’98

’Tenny, Emil B.. Supt., Blast Furnace, Am. Steel & Wire Co.. Pittsburg, Pa. ’92 *Terhune, Richard H., Min. Engr. and Met., 1543 Pearl St., Denver, Colo. ’86 *Terry, Laurence M., Genl. Mgr., The Prieta G. and S. M. Co.,

Parral, Chihuahua, Mexico. ’01

**Thacher, Arthur, Pres., Central Lead Co,, 4304 Washington Ave.,

St. Louis, Mo. ’75

**Thacher, William A Address wanted. '90

*Thackray, George E., Structural Engr , Cambria Steel Co,. Johnstown, Pa. ’80

*Thane, Bartlett L Sumdum M. Co., Siimdum, Alaska. ’01

*Thayer, Benjamin B., Mine Supt., Santa Rita M. Co.,

Santa Rita, Grant Co , New Mexico. '87 Thies, Adolf, Supt. and Genl. Mgr., Haile G. M. Co.,

Haile Gold Mine, S. C. ’78

**THrES, Ernst A., Asst. Mgr Haile G. M. Co,, Haile Gold Mine, S. C. ’00

Thiry, Joseph, Mgr., Otto Hilgenstock Coke Oven Co., Ltd.,

109 Victoria St., Westminster, London, S. W., England. ’92 *Thomab, W. E. a., Min. and Met. Engr., 19 Stanley Gardens,

Willesden Green, London, N. W., England. ’93 *Thomas, Albert E., Min. Engr., P. O. Box 253,

Coolgardie, Western Australia. ’97 *Thomas, Chester A., Min. Engr,, United Verde Cop. Co... Jerome, Ariz. ’02

Thomas, Edwin - Catasauqua, Pa. ’79

Thomas, Fred F., Pres, and Genl. Mgr., Gwinmine Dev. Co.,

Gwinmine, Calaveras Co., Cal. ’84

Membees And Associates,

Thomas, G-EonaE, 3d, SupL Diamond State Steel Co,, Wilmington, Del. ’95

*Thomas, George W Idaho City, Idaho. ’98

Thomas, Harry Mitssoy, Goldenhuis Deep G. M Co., Ltd.,

Cleveland, Johannesburg, Transvaal, So, Africa. ’00

Thomas, Samuel, Iron Trade Catasauqiia, Pa. ’71

*Thomas, Thomas E., Great Hanover Mine...Coolgardie, Western Australia. ’97 'Thomas, T. Lewis New Jersey Zinc Co., 71 Broadway, New York, N. Y. ’99 Thomas, William H., Care Bainbridge Seymour Co.,

13 St. Helen’s Place, London, E. C., England. ’93 Thomas, William S., Mine ., Oregon King M. Co.,

Ash wood, Crook Co , Ore. ’96 Thomlirson, William, Genl Mgr., Seaton Carew Iron Co ,

West Hartlepool, England. ’81

Thoivipson, Capt. Charles H 428 Bradbury Bldg., Los Angeles, Cal. ’00

Thompson. Hebeb S., Engr Girard Estate, Pottsville, Pa. ’76

Thompson, Bobert M., Pres., Orford Copper Co , 74 Broadway,

New York, N. Y. ’81

Thompson, William, Min. Engr, 58 New Broad St,

London, E. C., England. ’99

Thompson, William, Min. Engr. and Genl. Supt., Le Koi M. Co., Ltd.,

Bossland, B. 0., Canada. ’OO *Thomsox, Samuel C., Min. Engr., P. 0. Box 485,

Johannesburg, Transvaal, So. Africa. ’98 Thorne, William E., Min. Engr., Mgr., Gold Bag M. Co.,

Georgetown, Cal. ’01

Thornton, Dirk E., Care W. Leigh Hunt, 3 Great Winchester St.,

London, E. C., England. ’95

fTHORKTOK, William D Butte, Mont. ’96

Thow, Sydney, Civil Engr., Genl. Mgr., Hercules G. & S. Mining Co.,

Mount Read, Tasmania. ’02 Thropp, Joseph E. , Jr. , Genl. Mgr , Everett Furnace & Mines, Earlston, Pa. ’96

*’Thuillier, Gustave 66 Rue Oau martin, Paris, France. ’95

Thurston, E. Copper, Min. Engr., Room 302, 503 California St.,

San Francisco, Cal. ’96

Thurston, Prof. Robert H., Director, Sibley College, Cornell Univ.,

Ithaca, N.YL ’75

'Thyng, William S., Prof, of Mining, Wash. State College. .Pullman, Wash. ’99

Tiemann, Hugh P., Metallurgist Carnegie Hotel, Munhall, Pa. ’02

Tierney, John J., Pres Pocahontas Co., Bramwell, W. Va, ’83

Tierney, L. E., Genl. Mgr. Powhatan, Lynchburg, Elk Ridge & Eureka

C. & C. Co., Powhatan, McDowell Co., W. Va. ’89

Tillbeeg, Erik W., Chemist Worcester, Mass. ’02

“Tilly, Alfred, Min. Engr Trewisgie, Redruth, Cornwall, England. ’99

*Timm, JohnM., Min. Engr 49 Heinrichstrasse, Fulda, Germany. ’96

*Tindall, W. Francis CareS. Rickard, 1727 Stout St., Denver, Colo. ’95

Titcomb, Harold A., Min. Engr. and Actg. Mgr., Camp Bird Mines,

Ouray, (Jolo. ’99

Titswortii, Frederick S., Min. Engr. and Met ,

202 Boston Bldg., Denver, Colo* ’00

*Tobey, Horace P., Treas Tremont Nail Co., West Wareham, Maas. ’89

Tod, Herbert Noble, Mn. Engr 1918 Logan Ave., Denver. Colo. ’02

fToEDT, Emanuel B Fairbanks Co., Albany, N. Y. ’92

MEMBERS AND ASSOCIATES. Xciii

*Toll, Abel H., Min. Supt Wallace Min. Co., Pitkin, Colo. ’00

*Toll, Eensselaee H., Supt. Mancos Cons. G. M. & Dev. Co.,

Mancos, Colo. ’02

*To]vrLiNSON, Geo. H., Chemist, Lake Superior Power Co.,

Saulte Ste. Marie, Ont., Canada. ’02 Tompkins, Chaeles H., Engr. and Pres., Amer. Diamond Eock Drill Co.,

120 Liberty St., New York, N. Y. ’90 Tonkin, James J., Mgr , La Tortilla Lead Sm Wks.,

Calle Santa Engracia 2, Linares, Provincia de Jaen, Spain. ’93 Tonkino, James B., Supt New Jersey Zinc Co., Franklin Furnace, N. J. ’90

ToxKmG, William H., Min. Engr Dover, N. J. ’96

*Tonnele, Theodoee, Metl. Engr.. .Amer. Sheet Steel Co., McKeesport, Pa. ’84

nOBEBY, Heebbet G U. S. Assay Office, 30 WaU St, New York, N. Y. ’81

Totten, Alfred L, Min. Engr Connellsville, Pa. ’97

*Toxjceda, ENEiCiUE, Chem and Metallurgist Albany, N. Y. ’80

Totjlmin, Priestley, Pres, and Treas., Lehigh Coal Co.-Birmingham, Ala. ’88 'Touzeau, Edward M., Cons. Min. Engr., E. M. Touzean & Co.,

31 St. Swithin’s Lane, London, England. ’91

'Towee, Chaelemagne, Je 228 So. 7th Street, Philadelphia, Pa. ’87

*Tower, George W., Je., Geol. and Min. Engr Butte, Mont. ’01

Towbe, Joseph T 542 Fifth Ave., New York, N. Y. ’92

*Towne, Kobert S., Min. Engr., Pres., Compafiia Metalurgica Me:xicana,

27 William St., New York, N. Y. ’91

*Townsend Arthur R 117 East 57th St, New York, N. Y. ’01

*Townsend, David, Cons, and Mech. Engr., etc.,

1105 Penn Sq. Bldg., Philadelphia, Pa. ’80- *'Townsbnd, Harry P., Mine Mgr., Penhalonga Prop. Mines, Ltd.,

♦ Umtali, Rhodesia, So. Africa. ’01

Townsend, Hexry T., Mech. Engr., Pres., Logan Iron & Steel Co.,

610 Harrison Bldg, Philadelphia, Pa. ’70 *Teaphagen, Prof. Frank W., Chemist, Montana State College,

Bozeman, Mont ’99

*Tratman, E. E. Russell, Civil Engr. and Editor,

1636 Monadnock Bldg., Chicago, 111. ’91

*TBAyLOR, John A Ely, Nevada. ’99

Treadwell, Erwin D., Mine Mgr., G. A. Treadwell M. Co..Prescott, Ariz. ’93

*Teeat, 'P. H Jones & Laughlin, Ltd., 27th & Carson Sts , Pittsburg, Pa. ’86

'Treat, Lincoln A., Mech. Engr National Steel Co., Youngstown, Ohio. ’00

Tregloan, John R., Mine Supt., Mgr. and Owner Amador City, Cal. ’00

Trengove, Samuel R., Mine Mgr Cape Coast Castle, W. Africa. ’00

Trent, L. C Mount Lyell M. Co., Kelly Basin, Tasmania. ’78

*Treville, Edward B., Mine Owner 661 Second Ave., Detroit, Mich. ’97

Treweeke, John, Mine Mgr. and Cons. Engr., 254 So. 2d St,

Salt Lake City, Utah. ’02

*Trewenack, W. H., Genl. Mgr., Gulf Creek, Ltd.,

Gulf Creek, New South Wales. ’91

Trimble, A, J., Mine Operator .’ Sumpter, Ore. ’87

*Trotz, j. 0. Emanuel, Metallurgist.. ..U. S. Steel Corp., New York, N. Y. ’88 Teump, Edward N., Chief Engr. and Genl. Mgr., Solvay Process Co ,

1912 W. Genesee St., Syracuse, N. Y. ’96 TsclterniOff, Prof. Dimitry C., Met., 25 Rue Pessotchnaya,

St. Petersburg, Russia.

Members And Associates.

TrfUNO, Yamaguciliken, Japan.

Tuckeb, Albert.. W Seaboard Copper Co., Virgilina, Va.

*Tuckeb, Charles E. L., Assayer and Ore Buyer, Cons. K. C. S, & B. Co., Mexican Ore Co., Apartado 117, Jimenez, Chihuahua, Mexico. Tucker, MYllum A., Instructor Min. Engr. Michigan College of Mines,

Houghton, Mich.

**Tai>OE, William, Jr... B e Beers Cons. Mines Co., Kimberley, So. Africa.

fTuLLocH, Lindsay, U. S. Consul Launceston, Tasmania.

Turner, George D. B., Civil and Min. Engr., Pole Creek Placer Mine,

Morris, Madison Co., Mont.

*Turner, Henry' Geol. and Min. Engr., 320 Sansome St.,

San Francisco, Cal.

Turner, John K., Min. Engr Albany Hotel, Denver, Colo.

Turner, Bobert B., Min. and Consulting Engr., Kennett Min Co.,

103 East Broadway, Butte, Mont.

Turner, B. Chester, Supt Standard Cons. M. Co , Bodie, Cal.

Turner, William J., Bookman Bros., Boulder M. Co.,

Kalgoorlie, Western Australia.

Tusgeka, Otto, Assayer andChem Fundicion Ko. 2, Monterey, Mexico.

Tuttle, Arthur L , Min. Engr Jimiilco, Coahiiila, Mexico.

Tuttle, Herbert E Apartado 50, Monterey, Mexico.

*Tyler, Kat., Jr., Topographer U. S. Geol. Survey, Washington, D.C.

Tyrrell, Joseph B , Cons. Min. Engr., Tyrrell & Tyrrell,

Dawson, Yukon Ty., Canada. *Tyson, James W , Jr., Mgr Elizabeth Min. Co., South Strafford, Vt.

*ljBHLiNa, Edward A., Pres., Uehling Steinbait Mfg. Co.,

40 Bond St, Passaic, K. J.

*IJlke, Titxjs, Metallurgist and Min. Engr. ,

178 E. 70th St., New York, N. Y. *tJNDERHiLL, James, M in. Engr., U. S. Min. Survey... Idaho Springs, Colo.

Underwood, Arthur J., Min. Engr P. 0. Box 18, Bobinson, Utah.

*Unger, J. S., Supt, Amor Plate Dept., Carnegie Steel Oo-,

Munhall, Allegheny Co. , Pa.

Upham, Charles C., Vice-Pres. and Genl. Mgr , New York Steam Co.,

143 Liberty St, Now York, N. Y. 'Upham, W. E.jSupt.Minas Dolores y Anexas, Matehuala, S. L. P., Mexico. *Utlby, Howard H., Min. Engr Wilton, Ky.

fVAiLE, Joel F., Lawyer, Wolcott & Vaile..420 Equitable Bldg., Denver, Colo. Valentine, Charles F., Chillagoe By. Mines, Ltd.,

Chillagoe, No. Queensland, Australia, Valentine, M. D., Pre8,..M. D. Valentine Bro. Co-, Woodbridge, N. J. *Valton, Ferdinand, Civil Engr.,

19 Parc (le Montretout, St Cloiid, vSeinc et Oise, France.

-Van Absdale, Geo. D., Chemist 99 John St, New York, N. Y,

*Van Absdale, W. H Aurora, III

*Van Baeneveld, Charles E., Prof, of Min. Engineering,

Minn. School of Mines, MiimcapoHs, Minn,

Brunt, Charles G., Ohem 48 Brattle St., Cambridge, Mass.

Wan Cleve, Charles McK., Supt, Smelter, Cia. Met. Mexicana,

San Luis Potosi, Mexico.

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Members And Associates.

''Van Diest, Edmond C,, Min. Engr San Luis, Colo. '89

"‘Van Hise, Charles E., GeoL, U. S. Geol. Survey, and Prof, of Geol.,

Univ. of Wis.j Madison, Wis. '00

fVAN Ingen, Dudley A., Chem Kew Jersey Zinc Co., Newark, N. J. '95

'Van Isschot, Pierre E. C. ...Casilla 240, Guayaquil, Ecuador, So. America. ’96

'Van Mater, Joseph A., Consulting Engr. and Mgr Pulaski, Va. ’93

Van Ness, William W., Min. Engr.,

622 Salisbury House, London Wall, London, E. C., Eng. ’97 tVAN Nostrand, Charles B., Banker, Mine Owner,

36 Wall St., New York, N. Y. ’02

'Van Orden, Frank L Wyandot Lead Co., Houghton, Mich. '01

*Van Slyke, Frederick E., Min. Engr., GenL Electric Co.,

Philadelphia, Pa. ’01

‘‘Van Zwaluwenburg, a., Associate Editor Fharm. Era,

Commercial Bldg,, 396 Broadway, New York, N. Y. ’00 '''Varden, Kichard a., Cons Min. Engr, Bainbridge Seymour & Co.,

13 St. Helen’s Place, London, E. C., England. ’87 ’Yauclain, Samuel M., Supt,, Baldwin Locomotive Wks. ,

500 No. Broad St., Philadelphia, Pa. ’96

*'VEATcn, John A Maxwell, Colusa Co., Col. ’01

*Viele, Maurice A,, Civil Engr. Gen. Electric Co., Schenectady, N. Y. ’02

'ViGGERS, William, Mech. Engr Apartado 90, Durango, Mexico. ’89

*ViRGOE, Walter, Metallurgical Engr., P. 0. Box 121,

Care Mexican Gold and Silver Recovery Co., Ltd., Mexico City. ’02

Vivian, George G., Min. Engr Sultepec, Mexico, Mexico. ’82

Vivian, Godfrey T., Min. Engr.,

Pengegon House, Camborne, Cornwall, England. ’97

Vogelsang, Dr. KarIj, Min. Engr. Koenigl. Berginspektor,

Stassfurt, Germany. ’01

*VoORHELs, Edward C., Mine Supt Sutter Creek, Amador Co., Cal. ’99

Wadsworth, M. E., Prof, of Min. and Geol., Penn. State College,

State College, Pa. ’89

Wagner, Henry R., Agt., Amcr. S. R. Co.,

71 Broadway, New York, N. Y. ’02

Wagner, John L., Pres Wagner Palenros Mfg. Co., Fairmont, W. Va. ’00

*Wagoner, Luther, Civ. & Min. Engr.,

849 Chestnut St. , San Francisco, Cal. ’97

*WAINWIIGItT, Jacob T., Metl. Engr P. 0. Box 774, Chicago, 111. ’88

Wait, Charles E., Prof, of Chem., Univ. of Tennessee.. ..Knoxville, Tenn. ’79

Walcott, Charles D., Director, U. S. Geological Survey, Washington, D. C. ’92

Waldo, Dr. Leonard, Cons. Engr 49 Wall St, New York, N. Y. ’88

Walker, Arthur L., Mgr., Perth Amboy Plant, Amer. Sm. & Ref. Co.,

Maurer, N.J. ’85

*Walibr, Etheridge, Assay er Squaw Creek M. Co., Gazelle, Cal. ’02

Walker, Elton W Tombstone Cons. Mines, Tombstone, Ariz. ’01

*Wax.ker, J. C Room 1812, 71 Broadway, New York, N. Y. ’83

t Walker, John A., V.-Pros. and Treas., Joseph Dixon Crucible Co.,

Jersey City, N. J. ’78

Walker, John N., IJ. S. Govt Assayer (Custom Service).. Everett, Wash. ’94

*Wai.ker, T. B Franklin Iron Mfg. Co., Franklin Springs, N. Y. ’84

*Walkeb, W. R., Chem. U. S. Steel Cor., Empire Bldg., New York, N. Y. ’81

Members And Associates.

Enos A., Met 309 So. Temple St., Salt Lake City, Utah.

Wallace, James P., Genl. Mgr Monmouth Dev. Co., Kingman, Ariz.

Wallace, Louis B., Met Detroit Cop. M. Co., Morenci, Ariz.

Wallace, William C., Mine Mgr. and Lawyer, Care Realty Syndicate,

14 Sansome St , San Francisco, Cal.

**Walleb, Dk. Elwyn, Anal. Chem 159 Front St., New York, N. Y.

*Waller, Geoeg-e a., Asst. Govt. GeoL, Mines Office,

Launceston, Tasmania.

*Wallin, Gustae, Min. Engr Kiruna, Sweden.

Wallis, Philip, Supt., Motive Power Long Island B B ,

Richmond Hill, N. YL

*-Walsh, Thomas F., Mine Operator,

1420 New York Ave , Washington, D. C.

Walter, E. W., Met., Supt Kendrick & Gelder Sm. Co , Silverton, Colo.

Walter, Rudolph J., Min. Engr 1452 Blake St., Denver, Colo.

*Wanless, Geo. Jas., Assayer and Chemist, Ore Purchasing Agt.,

Am. Sm. & Bel Co., El Paso, Texas. *Waed, Osmer B., Metallurgist, Hannan’s Star Gold Mines,

P. 0. Box 158, Kalgoorlie, W. Australia. *Waed, Willard P., Mim Engr..Mills Bldg., 15 Broad St., New York, N.Y.

Warden, Bruce B., Supt., Care Clarkson, Cross & Helliwell,

Hastings St., Vancouver, B. C. *Wardman, George B., Assayer and Chem., Apartado 24,

Aguascalientes, Mexico.

Warne, Henry Herbert, Mining, 28 Boseberry Block, Cripple Creek, Colo. Warner, Willard, Jr., Supt., Blast Furnace, Boane Iron Co.,

Rock wood, Tenn.

*Warren, Henry B., Min Engr.. 1043 Burrard St., Vancouver, B. C., Canada. *Warriner, Samuel D., Genl Supt., Lehigh Valley Coal Co.,

Wilkes-Barre, Pa.

**Wartenweiler, Alfred Crocker Bldg., San Francisco, Cal.

Warwick, Arthur W., Min. Engr P. 0. Box 1711, Denver, Colo.

Washington, William d’H., Civil, Mech. and Min. Engr.,

1 Broadway, New Y'ork, N. Y. Waterman, William J., Min. Enr, Vermilion Porks

M. and Dev. Co., Ltd, Princeton, B. C., Canada.

**Waters, Albert L., Mine Mgr Apartado 222, Guadalajara, Mexico.

*Waters, Stephen, Mech. and Electr. Engr.. Apartado 96, Pachuca, Mexico. Watkins, A. Octavius, 1st Asst. Assayer, Royal Mint,

Perth, Western Australia.

*Watson, Charles S-, Anal. (Iiem. & Met.,

Queensland Menzies G. M. Co., Menzies, Western Australia. *Watson, Ralph W., Mech. Engr., Am. Sm. Bef. Co.,

Apartado A, Aguascalientes, Mexico. *Watson, Robert W., Min. Mgr., Iowa G. M. and Milling (!o.,

Silverton, Colo.

Watson, Eolla B., Cons. Min. Engr., 233 Commercial Club Bldg.,

Salt Lake City, Utah.

*Watson, Prof. Thos. L ..Denison Univ., Granville, Ohio.

*Watson, Walter L., Genl, Mgr. Engr., Clear Spring Water

Ceinenton, Pa. Sandy Lake, Pa.

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Watson, Winfield S.

Membees And Associates.

*WatTj J. Henry First Natl. Bank, Braddock, Pa. ’97

*Watts, William L., Min. Engr, State Expert of Mines,

Chamber of Commerce, Los Angeles, Cal. ’97 t Waugh, Percival B., Min. Engr..The Glen, Boumemoutii, West England. ’90

Weatherby, Wm. J., Min Engr Cooney, N. Mexico. ’02

*Webb, Ernest H Care Trenton I. Co., Trenton, N. J. ’01

Harry H., Supt. Engr., Care Cons. Gold Fields, Ltd.,

P. 0. Box 1167, Johannesburg, Transvaal, S. Africa. ’85 *Webb, Louis, Care Dev. Co. of C. & W. Africa, 23 Moorfields,

London, E. C , England, ’97

*Webb, William M., Min. Engr., Ibex M. Co.,

P. 0. Box 307, Leadville, Colo. ’00

Weber, Frederick C., Mech. Engr., Rand Drill Co.,

710 Park Bldg., Pittsburg, Pa. ’99 Webster, Hosea, Mgr. N. Y. Sales Dept., Babcock & Wilcox Co.,

85 Liberty St., New York, N. Y. ’95 Webster, Paul W., Min. Engr Variety Iron Wks- Co., Cleveland, Ohio. ’98 Webster, William R., Cons, and Insp. Engr., 411 Walnut St,

Philadelphia, Pa. ’92

Weck, Charles A., Min. Engr., 127 New Montgomery St.,

San Francisco, Cal. ’97

Wedding, Prof. Dr. Hermann, Prof, of Iron Metallurgy, Counsellor of

Mines, Genthinerstrasse 13, Villa C., Berlin, Germany.

Weddle, Joseph H., Mine Mgr Vinnse M. Co., Leadville, Colo. ’97

Wedge, Utley, Minei* and Oil Refiner..ll5 Chestnut St., Philadelphia, Pa. ’02

*Weed, Floyd, Met. and Chem Annie Laurie M. Co., Kimberly, Utah. ’97

*Weed, Walter H., Cons. Min. Engr., U. S. Geol. Survey, Washington, D. C. ’98 **WBrGALL, Alfred R., Met. Engr , Care Japan M. Co., Ltd.,

Yokohama, Japan. ’ 98

*Wetmer, Asa A., Mech. Engr Weimer Machine Wks. Co., Lebanon, Pa. ’85

IWeimbr, Edgar A., Supt Weimer Machine Wks. Co., Lebanon, Pa. ’97

*Weimer, John A., Pres, and Supt., Weimer Machine Wks. Co.,

Lebanon, Pa. ’85

♦Weinberg, E. A., Genl. Mgr., Chillagoe Ry. Mines, Ltd.,

Chillagoe, No. Queensland, Australia. ’94

*Weir, Charles G., Mining Highland, Ulster Co., N. Y. ’95

*Weir, George, Chief Engr., Broken Hill Prop Co., Block 14 Mine,

Broken Hill, New South Wales. ’00 *Weie, Thomas, Min. Engr., Owner & Mgr. of Mines,

Room 306, Dooly Block, Salt Lake City, Utah. ’90

*Wbiss, Moritz, Met 324 Cedar Ave., Scranton, Pa. ’91

*Weld, Christopher M., Min. Engr., Mine Securities Corp.,

35 Wall St, New York, N. Y. ’01

Wellman, Charles H., Geul. Mgr., Wellman See ver-Morgan Engineering

Co., New England Bldg., Cleveland, Ohio. ’90 Wellman, Samuel T., Pres., Wellman Seaver Engineering Co.,

New England Bldg., Cleveland, Ohio. ’75

t Wells, Calvin, Mfr Pittsburg Forge and Iron Co., Pittsburg, Pa. ’73

Wells, Horace L,, Prof. Chem. and Met, Sheffield Scientific School,

New Plaven, Conn. ’96

Wells, J. Walter, Min. Engr., Provincial Assay Office,

Belleville, Ont,, Canada. ’02

Members And Associates.

*Welsh, Howard F., State Inspector Coal Mines, Lock Box 855,

Helena, Mont. ’91

*Wendei:i5 Charles de, Engr 6041 Bond St, E E., PittsBurg, Pa. ’00

*Wenstrom:, Olap, Min. Engr 45 Broad St, Boston, Mass. ’88

*Wentz, John L., Coal Mining 1100 Girard Trust Bldg., Phila., Pa. ’02

*Wentz, Johns., Coal Operator 39th and Locust Sts., Phila., Pa. ’02

*Wepfer, G. W., Cons. Mech. Engr., P. O. Box 2088, Johannesburg,

Transvaal, So. Africa. ’99

Wesley, Wm. H. J Mt Lyell M. &K. Co,, Queenstown, Tasmania. ’01

*, Haarlem E., Min. Mgr., Pacific Northwest M. Corp., Ltd.,

Libby, Mont* *00

Western, Charles E,, Engr., Broadway Chambers, Westminster,

London, England. ’92

Western, Frank, Min. Engr..6 Bolton Gardens, S. W., London, England. ’95 Westervelt, William Y., Cons. Min. Engr., 100 William St.,

New York, N. Y. ’95

Westinohouse, Geo rob, Jr., Mech. Engr Pittsburg, Pa. ’86

Wetherill, John P., Cons. Engr., New Jersey Zinc Co.,

n Broadway, New York, N. Y, ’96 *Wethey, a. H., Genl. Mgr W. A. Clark’s Mines & Smelter, Butte, Mont. ’90

Wetmore, E. a ...P. 0- Box 131, Marysville, Mont. ’89

'Wheeler, Archer E., Chief Engr., Boston & Montana C. C. and S. M. Co.,

Great Falls, Mont. ’99

’*W'heeler, Herbert A., Cons. Min. Engr 721 Olive St, St Louis, Mo. ’81

Wheeler, S. Bowman, Mech. Engr Girard Trust Bldg., Philadelphia, Pa. ’92

Wheeler, Shelton Kino, Assayer and Min. Engr.,

30 W. 44th St, New York, N. Y. ’02

Whinery, S., Civil Engr 95 Liberty St, New York, N. Y. ’80

fWHiPPLE, Arthur S P. 0. Box 332, Melbourne, Victoria, Australia. ’99

'Whitaker, De Berniere, Min. Engr., Spanish- Anaerican Iron Co,,

Daiquiri, Santiago de Cuba. ’ 99

’Whitaker, Orville R., Min. Engr., N. Y. & Honduras Mining Co.,

San Juancito, Kep. Honduras, C. A. ’99 Whitcomb, George D., Pres., G. D. Whitcomb Co.,

86 East Ohio St, Chicago, 111. ’83 White, Charles PL, Instructor Min. & Met,

Botch Bldg., Cambridge, Mass. *01

*Whitb, Mahnsel, Chem Bethlehem, Pa. ’88

t White, Norman F., Min. Engr Mount Morgan, Queensland, Australia. ’02

Whitehead, Cabell, Assayer, Biggs House, Washington, I). C. ’90

*Whiteley, James S Continental Trust Bldg,, Baltimore, Md. '92

Whiting, S. B 11 Ware St, Cambridge, Mass. ’71

Whitmore, Lawrence H., Civil, Mech. & Mining Engr.,

P. 0. Box 163, Bulawayo, Rhodesia, So. Africa. ’90

Whitney, Eli, Jr 800 Whitney Ave., New Haven, Conn. ’75

Whitney, Granger, La Follette Coal, Iron R.R. Co.,

La Follcte, Teim. ’91

Whitney, Willis B., Electro Chem., Genl. Elcc. Co., Schenectady, N. Y. ’02 *Whittall, Hugh E. C, Min, Engr., Care .1. W. Whittall 4 % Co.,

via London Open Mail, Constantinople, Turkey. '99 Whittle, Charles L., Geol. and Min. Engr..20 Central St., Boston, Mass. ’97 *%HYTE, Fbedeetck W. C., Genl. Mgr. of Coal Dept.,

Anaconda Cop. M. Co., Anaconda, Mont. '00

Members And Associates.

WiARB, Edward S., Assayer, Empire State Idalio M. & Dev. Co.,

Wardner, Idaho.

*WiCKES, George T,, Civil and Min. Engr.,

Eooms 34 & 35 Pittsburg Block, Helena, Mont.

tWiCKES, L. Webster, Student Columbia Univ., Hew York, H. Y.

*WiDDicoMBB, Herbert P., Min. Engr. Whitehall, Mont.

*WiERXJM, Howard F., Chem Colo. Sm. Co., Durango, Colo.

*WiGMOBE, Cyril, Min. Engr.,117 South Los Angeles St., Los Angeles, Cal. fWiLBRAHAM, ARTHUR G. B., Mine Supt., Mason & Barry,

Mina de San Domingos, Mertola, Portugal. *WiLBUR, Warren A., Pres., Yalley Coal & Coke Co., W. Va.,

South Bethlehem, Pa.

*WiLCOX, John F., Genl. Mgr. and Chief Engr., Ketort Coke Oven Co.,

Hew England Bldg., Cleveland, Ohio.

Wilder, Fred. B., Min. Engr P. 0. Box 543, Keno, Nev.

Wilding, James, Jr., Chem., Amer. Smelting & Eef. Co.

Aguascalientes, Mexico.

*WiLES, Edwin L Stony Point, Eockland Co., H. Y.

Wiley, Walter H., Min. Engr Idaho Springs, Colo.

Wiley, William H., Publisher... 43 East Nineteenth St., New York, N. Y. *Wtley, William M., Pres., Seminole Mining Co.,

25 Broad St., New York, N. Y. *WiLKENS, Henry A, J., Min. Engr., New Jersey Zinc Co.,

11 Broadway, New York, N. Y.

*Wilkes, John, Mgr Mecklenburg Iron Wks., Charlotte, N. C.

*WiLKiNS, Albert D., Chem P. O. Box 324, Vandergrift, Pa.

Wilkins, Ross, Chemist, The Solvay Process Co., 621 Jefferson Ave.,

Detroit, Mich.

*WiLKiNS, William, Supt. Blast Furnace, National Tube Co.,

Riverside Dept., Wheeling, W. Va. *WiLKiNS, William Glyde, Min. Engr...Westinghouse Bldg., Pittsburg, Pa. Wilkinson, Arthur, Min. Engr., Care H. Eckstein & Co.,

Johannesburg, So. Africa.

Wilkinson, Charles D., Min. Engr Whitehall, Mont.

Wilkinson, J. F., Min. Engr., Care W. J. Bartnett, 328 Montgomery St.,

San Francisco, Cal.

Wilkinson, Paul, Secy., Acme Cement Plaster Co.,

917 Century Bldg., St. Louis, Mo. *WiLKiNS0N, Theodore K., Met., 1407 Van Ness Ave., San Francisco, Cal. Wilkinson, William F., Min. Engr., Consolidated Goldfields of

So. Africa, 8 Old Jewry, London, E. C., England.

Willard, Eugene B., Jr., Blast Furnace Mgr., Iroquois Iron Co.,

95th St. & Calumet River, Chicago, 111.

*WiLLEY, Henry I, Min. Engr 27 William St., New York, N. Y.

Williams, Alrheus F., Asst. Genl. Mgr., De Beers Cons. Mines, Ltd.,

Kimberley, So. Africa.

Williams, Ben, Mine Mgr Milton, Cal.

Williams, David, Publisher, Iron Age 238 William St., New York, N. Y. Williams, Edward G., Engr. and Supt , Caribbean Manganese Co.

(temporary, cor. Maple & Central Sts., Auburndale, Mass.),

Colon, Colombia, So. America.

Williams, Edward H., Mgr., Blast B'urnaces, Pickands Mather & Co*,

499 E. State St, Sharon, JPa.

’00

’76

’02

’98

’98

’00

’99

’92

’86

’02

’96

’82

’96

’81

’00

’92

’83

’02

’86

’91

’91

’00

’97

’90

’97

’96

’88

’00

’02

’97

’82

’80

’97

’93

Membbbs And Associates.

Williams. Pbof. R H., Jr Andover, Mass.

Williams, Fbank B., Mill Supt Elkhorn S. M. Co., Elkhorn, Mont. ’01

**WiLLiAMS, Fbed , Alan. Dir , Waratah Minerals Co., 7 Laurence,

Pountney Lane, London, E. C., England. ’90

Williams, Fbed. T., Alin. Engr P- O. Box 86, Victor, Colo. ’02

**WrLLiAMS, Gardner F., Genl. Mgr, De Beers Cons. Mines, Ltd.,

62 Lombard St., London, E. C., England. ’86

’Williams, Henry J., Cliem. Engr. and Anal Cbem.,

161 TremoutSt, Boston, Mass. ’87

Williams, H. J. C., Min. Engr , Care W. A. Trelvan, Cbilicito Rioja,

Argentine Republic, So. America. ’93 Williams, John R., Cons. Met. and Chem., Care H. Eckstein & Co.,

P. 0. Box 149, Joiiannesburg, Transvaal, So. Africa. ’99

Williams, John T., Constructing Engr 27 William St. , New York, N- Y . ’74

Williams, Lewis Napoleon Mine, Milton, CaL ’83

Williams, Luke, Genl. Algr., Mount Reid M. Co., Ltd.,

Alount Read, Tasmania. ’93

Williams, Morris, Mgr., Coal Cos., P. R. R., 67 Public Square,

Wilkes-Barre, Pa. ’91

Williams, Oliver, Pres Bryden Horse Shoe Co., Catasauqua, Pa. ’87

Williams, Richard H., Min. Engr.,

Cbynoweth, St. Ertli Hall, Cornwall, England. ’96-

Williams, Samuel H., Genl. Mgr., Br. <fe Korean Corp , Ltd.,

Care Jardine, Matheson & Co., Sbanghai, China, ’93

Williams, Thomas J., Alin. Engr., Colebrooke Cop. Mine,

Montezuma, Tasmania. ’98

Williamson, W. Duncan... Lily Bank, Gowrock Rd., Greenock, Scotland. ’96

*WiLLis, Alebeo B., Alin Engr 32 Cornhill, London, E. C., England. ’02

Willis, Bailey, Geol U. S. Geol. Survey, Washington, D. C. ’92

Willis, Frank G., Min. Engr., Mining Exchange Bldg.,

Cripple Creek, Colo. ’97

Willmott, Arthur B., Geol. , Algoma Coml. Co. ,

Sanlt Ste. Alarie, Out., Canada. ’01 *WiLLS, Joseph L., Alin. Engr. and Chem..l33 Midwood St., Brooklyn, N. Y. ’89 *WiLLSON, Frederick E., Min. Engr... ..2117 Taylor St., San Fancisco, Cal. ’98 Wilson, Albert D., U. S. Deputy Mineral Survey,

P. O. Box 611, Deadwood, So, Dak. ’97

Wilson, Elliott H., Civil and Min. Engr., Receiver, Minnie Healy Mine,

Butte, Aiont. ’87

*WiLSON, Elwood j., Mining Operator Greenwood, B. C., Canada. ’94

*WiLSON, Georoe B., Min. Engr., Cons. Engr. for Chinese Engineering

AI. Co., Ltd., Tientsin, China. ’99 **'WiLS0N, Gordon - Benallan, Kirkintilloch, Scotland. ’02

Wilson, Harry, Austral Otis Engineering Go., Ltd.,

So. Melbourne, Australia. ’9S

tWiLSON, M. 0., . and Miner 33 Wall Street, ‘New York, N. Y. ’91

*WiL80N, Nathaniel, Cons, Meclu Engr.,

P. 0. Box 485, Johannesburg, Transvaal, So. Africa. ’98

**WiLS0N, Newton K., Genl, Mgr 27 Calle Iturbide, Alontcrey, Mexico. ’HI

*WiLS0N, Richard, Min. Mgr Mammoth Af. Co., Wallace, Idaho. ’09

fWiLsoN, R. T., Jb., . and Miner 33 Wall Street, New York. N. Y. ’91

Wilson, William A., Cons. Min. Engr., 610 Progress Bldg.,

Salt Lake City, Utah. ’83

Members And Associates.

Wilson, Walter B., Min. Engr Box 453, Colorado Springs, Colo.

*WiLTSEE, E. A., Cbem 850 Equitable Trust Bldg., Denver, Colo.

WiNCHELL, Alex. N State School of Mines, Butte, Mont.

*WiNCHELL, Horace V., Geol Anaconda Cop. M. Co., Butte, Mont.

WiNES, Jerry M., Miner P. 0. Box 783, El Paso, Texas.

*WiNOATE, Hamilton M., Chem. and Met., G-lenthorpe, Cotham Grove,

Bristol, England.

*Winmill, Hallett, Min. Engr.,

P. 0. Box 217, Coolgardie, Western Australia. *WiNSL0W, Arthur, Min. Engr. and Geol., Liberty Bell G. M. Co.,

308 Lyceum Bldg. , Kansas City, Mo.

fWiNSLOW, George C., Jr 107 Huntington Ave., Boston, Mass.

*WiSEMAN, Philip, Mgr 2313 So. Hope St., Los Angeles, Cal.

*WisHON, Walter W., Min. Engr Butte, Mont

WiSTER, Jones, Dealer in Pig Iron, Coal & Coke,

672 Bullitt Bldg., Philadelphia, Pa.

*WiTHERBEE, Frank S., Iron Mining Port Henry, K Y.

**WiTHERBEE, T. F., Supt., Mexican National Steel & Iron Co.,

Durango, Mexico.

*WiTHERBEE, WALTER C., Iron Business, Treas., Witherbee, Sherman & Co.,

Port Henry, N. Y.

*WoAKES, Ernest E., Cons. Min. Engr.,

78 Harley St, London, W. England. *WoLF, Albert H., Cons. and Contracting Engr., Boom 720 218 LaSalle St,

' Chicago, 111.

*WoLP, Theodore G 136 Wyoming Ave., Scranton, Pa.

**WoLFP, Dr. Fb. M 2 Jaegerstrasse, Berlin, West Germanv.

*WoLLE, Hartley C., Asst. ., Besssemer Mills, Cambria Steel Co.,

Johnstown, Pa.

Yang Tsang, Mine Mgr., Tong Colliery,

Tong Shan, near Tientsin, China.

>WooD, Alvinus B., Min. Engr., Treas.* Welded Steel Barrel Co.,

30 Medbury Ave., Detroit, Mich,

WooD, A. Hamilton, Vice-Pres. and Genl. Mgr., Crooked Fork Coal

& Coke Co., Petros, Tenn.

*Wooi), E. Fred., Vice-Pres., International Nickel Co.,

74 Broadway, New York, N. Y.

*WooD, E. Seymour, Chief Min. Engr., Bengal Coal Co., Ltd.,

6 Fairlee Place, Calcutta, India.

WooD, Howard, Pres Alan Wood Co., Conshohocken, Fa.

*WooD, Lee S., Mine Mgr 203 23d Ave., Denver, Colo.

*WoOD, Kobert a., Mine Engr.. .18 Queen Victoria St., London, E. C., Eng.

*WoOD, Thomas D., Iron 82 Vandergrift Bldg., Pittsburg, Pa.

*WooD, Tinglby L., Mining Leadville, Colo.

*WooD, Walter, Iron 400 Chestnut Street, Philadelphia, Pa.

*WooD, William 0., Mgr., By-Product Coke Ovens, Semet-Solvay Co.,

Benwood, W. Va.

WOODBRIDGE, Tyler K., Mgr. Taylor & Brunton Sampling Go.,

Victor, Colo.

Woodbury, Leander S., Pres-Great Falls Iron Works, Great Falls, Mont. Woodrow, James W., Genl. Supt., Corap. Minera de Pefioles,

Mapimi, Durango, Mexico.

92

'86

’01

’92

’01

’96

’98

’81

’97

’98

’82

’79

’76

’71

’80

’89

’82

’79

’82

’00

’82

’97

’86

’97

’88

’96

’97

’79

’89

’85

’00

’87

’80

’95

Members And Associates.

Woods, Fraitk M., Mine Mgr Victor, Colo. 98

*WoODWAiiD, AiiLAN H., Geni. Supt... Wood ward Iron Co , Woodward, Ala. ’00

Woodward, Henry E., Mine Supt Percy Cons. M. Co., Aspen, Colo. ’89

Woodworth, Todd C., Mine Supt Lake Linden, Midi. ’99

**WooLMER, Herbert C T., Genl. Mgr. Waitekauri Extended, Ltd.,

Maratoto, Auckland, New Zealand. ’98 Worthington, Charles C., Mech- Engr..l20 Liberty St., New York, N. Y. ’85

Weight, Cary, Mining Capitol Hotel, Boise, Idaho. ’00

Weight, Fred. A., Mining Apartado 89, Monterey, N. L., Mexico. ’02

Weight, James N., Mine Supt., retired, 34 Warren Ave., E. Detroit, Mich. ’79 *Wright, Lewis T., Genl. Mgr. and Supt. Engr., Mountain Cop. Co.,

Keswick, Cal. ’97

t W right, Philip E., Sales Agt 703 Girard Bldg,, Philadelphia, Pa. ’02

*Wbight, Sidney B , Met., Care Ponsonby & Bolton, 48 Queen St.,

Melbourne, Australia. ’00

**Wright, Whitaker 2 Whitehall Court, London, S. W., England. ’81

*Wright, William Q., Min. Engr 320 Sansome St., San Francisco, Cal. ’99

*Weightson, Wilfrid I., Min. Engr.. .Neasham Hall, Darlington, England. ’OO

Wrinkle, L. F. J., Min. Engr Kiverside Hotel, Keno, Nevada. ’01

*WxJENSCH, Alfred F., Min. Engr 1220 Corona St., Denver, Colo. *00

**WuEGLER, Andre, Min. Engr., Prof, of Mining,

7 Rue Vite, Paris, Prance. ’85

*WiJLFF, Christian S., Mgr Stuttenheim, G. C., So. Africa. ’98

*Wyatt, Francis, Chem 39 S. William St., New York, N. Y. ’87

Ashley H. P., Assayer, Care Calabacillas Mining Co.,

via San Jos4 de Gracia, Sinaloa, Mexico. ’95 o

*Yamanucht, Shigema, Cons. Engr. to Takata & Co.,

Kojimachi-Ku, Tokio, Japan. ’98

*Yard, Henry H., Min. Engr 415 Drexel Bldg., Philadelphia, Pa. ’98

*Yeates, William S., State Geol.. Atlanta, Ga. ’95

*Yeatman, Pope, Genl. Mgr , Bandfontein Estates & G. M. Co.. Ltd.,

Eandfontein, Transvaal, So. Africa. ’83 *Yonge, Allen M., Min. Engr., Thayer M. & M. Co., Miramar

(via New Orleans), Costa Bica, Central America. ’00

*York, James E., Cons. Engr. 52 Broadway, New York, N.Y. ’87

*Yorke, Charles A., Min. Engr..52 Rutland Gate, S. W., London, England. ’98 *YotriTG, Edward L., Engineer, Takata & C 0 ..IO Wall St , New York, N.Y. ’87 fYouNG, Francis E., V. Pres., Boston Exploration Co.,

20 Centi*al St., Boston, Mas-s. ’02 **Yoxjng, George J., Asst. Prof, of Met Univ. of Nevada, Bono, Nevada. ’00

Yoxtng, James S., Met 51 Grant Street, Glasgow, Scotland, ’95

Young, John C., Miner Baker City, Ore. ’(12

Yottng, John W., Secy., Allis-Chalmers Co., 25 Broad St,,

New York, N. Y. ’94

*Young, j. W. B , Strathmore, Eastern- Road, East Finchley, N.,

London, England. ’91

Young, Lewis E ,...P. 0. Box 19, Ames, Iowa. ’01

*YirNG, Morrison B., Assayer and Min. Engr., 748 Asylum Ave.,

Hartford, Conn, ’02

*Zambrano, Adolpho, Miner. Zbhnder, C. H

.P. 0. Box 0, Monterey, Mexico. ’02 ..25 Broad St., New York, N. Y. ’87

Members And Associates.

cm

Zeller, Frank M., Secy., Continental Mfg. Co., 400 Chestnut St.,

Philadelphia, Pa. ’00

*ZERBEy, Frederick E., Min. Engr 38 North Vine St., Hazleton, Pa. '92

*ZiMMERMAN, Adolph A., Chemist and Assayer Helena, Mont. ’96

fZiNTGRAPE, E Hohoken-les- Anvers, Antwerp, Belgium. ’98

Honorary Members 10

Members 3100

Associates 157

Total 3267

Deceased.

Jereascd.

Addy, Matthew 1896

Allen, K. B.. 1896

Amiot, H. 1-892

Amsleb, Cael 1894

Angsteom, Carl 1901

Aemstbong, John F 1898

Abnolds, Hugo 1886

Ashbubner, Charles Albert.. 1889

Ashbubner, William 1887

Atkins, C. M., Jr 1886

Ayers, William 1898

Babcock, Geo. H 1893

Bailey, Edward 1889

Bailey, Jackson 1887

Babnes,F.W 1892

Barns, George T 1900

Babratt,D.H 1888

Batterman, C. S 1901

Becher, H M 1893

Beeger, H 1892

Bell,G.B 1893

Bennett, David A 1897

Bierwith, L. C 1902

Billing, G 1890

Blake, F. C 1891

Blossom, T. M 1876

Boericke, Eudolph 1897

Booth, Edgar H 1898

Borda, E 1897

Bosher, 0. H 1894

Bowden, James H 1900

Bowman, Amos 1894

Boyle, Thomas G 1890

Braden, S 1894

Brainerd, a. F 1893

Beam WELL, J. FI 1894

Briggs, Kobert 1882

Beinsmade, J. B 1884

Brown, A. C 1890

Brown, A. J 1876

Browne, Arthur Richard 1900

Browning, F. D 1885

Bruckner, Wm 1887

Bbunings, j. H 1893

Bucke, M. a 1899

Buell, P. A 1900

Bullock, M. C 1899

Bunsen, Robert 1887

Butler, Cyrus 1890

Button, Edward 1900

Byers, Alexander M 1900

Caldwell, W. B., Jr 1880

Cameron, J ames R 1881

Campbell, William Y 1899

Cabkeek, John 1900

Carnegie, Thomas M 1886

Carpenter, J. H 1898

Carrel, F. J 1894

Carroll, Michael... 1891

Cary, John S 1899

Case, W. H 1898

Castillo, A. del 1895

Chaleant, John W 1898

Chambers, R. C 1901

Chanute, Arthur 1895

Chafer, Maurice 1896

Cheever, B. W 1888

Chisholm, Henry 1881

Chisholm, S. S 1901

Clark, C. J 1896

Clark, Ellis 1895

Clark, Henry G 1881

Clark, R. Neilson 1894

Clark, William 1884

Clayton, Joshua 1889

I Clayton, W. S 1886

Clemes, j. P 1876

I Cole, Harold M 1902

I Collins, Arthur L 1902

Collins, H. E 1896

Con ANT, T. P 1891

CoNRO, Albert 1901

Contreras, Manuel Maria 1902

Converse, James B 1883

Conyngham, C. M 1894

Cook, George H 1886

Corbett, Francis E 1901

Coryell, Martin 1892

Cowl AND, C. D 1894

Cowles, E.H 1892

CoxE, Eckley B 1895

Crafts, Walter 1896

Craven, Frank S 1889

Craven, Henry S 1889

Crocker, William B 1885

Curry, Henry M 1900

Daddow, S. H 1875

Dagron, j. G 1895

HAltgny, H. F. Q 1875

Darley, E. C 1901

Darling, J. V 1892

Darling, W. P 1896

Danbree, A 1890

Davidson, D. R 1884

Davipis, Ed w. S 1885

Davies, W. B 1891

Davis, M.C 1886

Dayton, L.M 1892

De Camp, A. H 1895

DbCamp,Edw. F 1895

DeCeano, E.G.. 1893

De Peigee, R. F. J 1883

Desloge, John M.. 1900

Dickson, Thomas 18S4

DrssTON, Horace C 1902

Disston, Thomas S 1895

Dodge, Wallace H.. 1895

Dodson, B. T 1896

Deceased.

Ct

Dominick, F. J 1895

Dorsey, E. B 1900

Dresser, Charles A 1873

Duefiell, P. W 1897

Durpee, W. F 1899

Dwight, W. S 1884

Egleston, Thomas 1900

Ely, Ei B 1884

Ely, GtEORge H 1894

Emanuel, W. H 1901

Emerson, B. F 1884

Emery, Charles E 1898

Engelmann, Henry 1899

Escobar, Mario 1901

Essery, E. H 1897

Evans, John D 1891

Fegeley, Isaac 1891

Felton, S. M 1884

Fernekes, Anton 1887

Ferris, G. W. G 1896

FiRiMSTONE, William 1875

Fisher, Harvey 1889

Fisher, H. H 1888

Foote, Herbert C 1880

Ford, Robert G 1891

Francis, A. G 1890

Freeman, H. C 1900

French, Aaron 1902

Fuller, John T 1885

Fuller, T. E 1898

Fultoh, G. E 1895

Furlonge, W. H 1896

Furman, FI. Van F 1902

Gaetzseliniann, Moritz 1895

Gatewood, K 1890

Gilson, W. K 1898

Gilbert, Edward G 1893

Goetz, G. W 1897

Goodwillie, J. B 1898

(iooDwiN, H.S 1892

Gould, Kobert A 1878

Gowen, Franklin B 1889

Gracey, F. P 1895

Graham, Thomas 1892

Grant, John A 1897

Gridley, Edward 1887

G-rippen, John 1884

Grubb, E. B 1899

Gruiier, L 1883

Guenther, Albert 1899

Gurley, W tLLiAM 1887

Hadley, W. C 1896

Hahn, Ignatius* 1888

H AINSWORTH, William 1896

1 1 A Lder, A Lbert H 1901

Hall, Isaac 1902

Hall, James F.,.., 1884

Hall, Jesse 1902

Hammer, Hakon 1896

Harlow, Mellen S 1901

Harniokell, a 1887

FI ARRIS, vStephen 1874

FIart, W. R 1892

Hartung, Max J 1894

Harvey, William H 1888

Hayden, Edward S 1899

Hazard, Rowland 1898

Healy, Morris 1881

Heard, John, Jr 1895

Hemphill, James 1900

Heinrich, Oswald 1886

Henry, Adolph 1892

Hicks, Geo. J 1891

Hillman, Daniel 1890

Hinton, F 1895

Hoatson, Thomas 1897

Hodgson, Thomas 1896

Hoefer, Eugene 1899

Holbrook, F. N 1902

Holden, E. F 1899

Holley, A. L 1882

Hollister, 0. J 1892

Hollow ay, J. F 1896

Hope, Frank E 1890

Horton, N. W... 1886

Hosie, James P 1898

Hosking, George F 1895

Howard, T 1896

Huhn, E. C. 0 1894

Hulbert, Thomas H 1889

Humphreys, A. W 1894

Hunt, Alfred E 1899

Hunt, Joseph 1897

Hunt, Joshua 1886

Hunt, Thomas 1872

Hunt, T. Sterry 1892

Hussey, C. 0 .. 1884

Hyndman, E. K 1884

Tngebsoll, S. Warren 1884

Inman, A. L 1894

Ireland, Thomas A 1902

Irving, R. D, 1888

Irwin, John H 1890

James, Isaac E 1887

James, Reese 1899

Jamieson, M. B 1895

Janin, Alexis 1897

Janney, Morris P 1898

Jenney, F. B 1876

Jernegan, j. L 1881

Jessop, Wmiam H 1900

Johnson, Isaac G 1902

Johnson, William E 1901

Johnston, W. N 1880

Jones, D. N 1889

Jones, Edward 1892

Jones, Griffith 1888

Jones, W. R 1889

Jordan, Samson 1900

Jousseltn, A. L 1897

Kelly, G. D 1892

Kerr, Prop. W. C 1885

Kimball, Hiram..,. 1899

King, Clarence 1901

King, Porter 1901

Kingsley, J. Cook 1899

Koch, E. C 1898

Koehler, Walter J. 1901

Deceased,

Kornberg, Gr . A

Kreischee, C.Gr

Keiete, Henry C

Kurimoto, Ren

Labeam, GEORaE

Lamboen, E. H

Landsbeeq-, E

Labnach, W. J. M

Lavaleye, E. be

Le Conte, Joseph

Lee, E. H

Lee, E. H

Lee, Washington

Leiseneing, E. B

Leisenring, John

Lewis, David B

Lewis, James F

Liebenad, Charles von.,

Lienau, D B

Lindsay, Edward H

Loans, W. E

Lobdell, Geo. G

Loiseau, E. F

Lord, John C

Lord, E. F

Lorenz, W

Lorenz, W., Jr

Lowe, Francis A

McCormack, Henry

McGennis, J. W

McIntire, Henry M

McKee, David

McKeown, S. W

McNair, Thos. S...

Mackintosh, J. B

Mackintosh, W. S

MacLaren, Duncan N...,

MacLean, F- P

MacMartin, Archibald.

Macy, Arthur

Macy, Charles A., 2d

Maffet, W. R

Manness, Charles F

Manthey, William

Manzavino, N

March, W. J

Marsh, Charles W

Marsh, Walter

Martine, Charles A

Marvin, Selden, E

Matthews, C. W

Maury, M. P

Means, Archibald

Mellors, Paul

Merour, Frederick

Messer, Edgar H

Michaelis, 0. E

Mxckley, j. W

Middleton, W. B

Miles, Fred P

Miller, C. H

Miller, Reuben

Mills, James E

Moffat, E. S

Moister, I- R

Molson, j. H. R

Moore, Charles W.—

Moore, James

Morgan, J

Morgan, Thomas R

Morris, S. Fisher

Nason, Henry B

Nelson, W. S

Newberry, W. E

Newton, Henry

Newton, Isaac

Nichols, Edw

Nichols, N. J

Nicholson, A. H

Nielson, James

Nitze, H. B. C

Noble, Samuel

Noblet, A

! Norton, F. 0

O’Farrell, John J...

Oliver, William

Owen, Frank

Owen, J. R. D

Painter, Howard

i Park, James, Jr

Parker, 0. B

Parks, John C

Parsons, Charles 0..

Patera, Adolph...,

Patterson, W. E.'

Percy, John

Peters, J. C i

Peters, Samuel.

Pettibone, Augustus.

Phelps, Walter

Phillips, P. E

Pierson, O. H

Platt, Franklin

Platt, J, C

Platt, W. G

Pleasants, Henry

Plummer, J. W

Porter, Geo. A

Posepny, Franz

Potes, J. D

Powell, John B

Pratt, N. W

Price, E. A

Price, J. A

Priest, J. B

Prince, P

Ramsay, M

I Rand, Addison C

Band, Jasper B

Bawling. Charles Q.

Beddy, P

Beed, H. L

Beid, j. M

Beinhardt, H. 0

Biohards, George

Bichter, C. E

Bichter, Theodor

Rickard, Alfred

1900’

1902'

1899*

1900'

1B92 1892‘ 1902'

1900*

DECEASED. CVli

Eickard, Ebuben 1896

Eickabd, E. H 1885

Eicketson, John H 1900

Eider, W. E 1892

Eingelino, Frank 1893

Eiotte, Eugene JST 1891

Eoberts-Aiisten, W. C 1902

Eobinson, L. L 1892

Eobinson, Thomas W 1880

Eogers, a. N 1890

Eoosevelt, Elliott 1894

Eosecrans, W. S 1898

EoTHWELL, Eichard P 1901

Eotthoef, William 1897

Santa Marta, Eaymundo be... 1883

Savage, E. G 1891

Saylor, David 0 1884

ScHAUFUSS, E. C 1889

Schirmer, J. F. L 1877

vSCHLINK, T 1893

Schmalensee, Carl Von 1887

ScHucHARD, Charles 1883

Schwartz, J. E 1900

Scranton, W. H 1889

Seddon, T 1896

Serlo, Albert 1898

Seymour, L. 1 1900

Sheafer, P. W 1891

Shields, C. 0 1896

Shinn, W.P 1892

Sickles, T. E 1885

Siemens C. William 1883

SiLLIMAN, B 1885

SiLLIMAN, J. M 1896

Sims, Alfred W 1895

Skinner, T. L 1894

Slade, F, J 1891

Sluder, E. E 1897

Smalley, W. A 1886

Smith, Frederick H 1899

Smith, Hamilton 1900

Smith, J. Harcourt 1899

Smith, H.S 1899

Smith, W.T 1898

Spottswood, G. a 1896

Sprow, j. H 1895

Stanley, Henry M 1902

Steitz, Augustus 1876

Sterling, Henry S 1882

Stetefeldt, C. a 1896

Stevens, Andrew 1895

Stevens, Edwin A 1902

Stevens, Wm. F 1902

Stinson, John M 1884

St. John, L M 1880

Stoddard, A, B 1900

Stookwell, Ff. 8 1 888

Stoddee, B. H 1889

Stoblting, Hermann 1875

Stollmbyer, a. B 1890

Stone, Gen. Charles P 1887

Stone, G. G 1893

Straker, Tooke 1892

Striedinger, j. H 1894

Swindell, William 1902

Swoyer, John H 1899

Symington, W. 1899

Symons, W. E 1888

Taunton, F. W 1900

Teft, Walter 1885

Thaw, Wm., Jr 1892

Thielen, Alexander 1897

Thomas, David 1882

Thomas, D. M 1895

Thomas, John 1897

Thomas, Sidney G 1885

Thompson, F. A 1897

Thompson, Prof. C. 0 1885

Thompson, William T 1899

Thomson, John L 1900

Thonard, Leon 1886

Tileman, John N 1888

Torrance, J. F. 1895

Torrey, Gray 1898

Tower, A 1891

Trippel, Alexander 1896

Troilius, M 1886

Tunuer, Peter Ritter v. 1897

Tuttle, H. A 1888

Tyson, James W 1900

Ulrich, George H. F 1900

Vale, Stephen W 1902

VanSlooten, Wm 1901

Van Tuyll, C. B 1890

Van Wickle, A. S 1898

Van Zandt, F 1892

Veeder, H 1896

Vezin, Henry A 1902

Wagner, J. R 1890

Waithman, Hubert 1891

Walker, Hamilton 1895

Walker, Joseph R 1901

Walker, W. J. B 1894

Walsh, Edward, Jr.. 1901

W ALTER, T. Frank ; 1888

Walz, IsiDOR 1877

Warner, L. E 1884

Waters, J.H.E 1893

Waters, Thomas J 1898

Watson, Frederick M 1900

Watson, Wm 1902

Watts, D 1893

Webb, H. Walter 1900

Weeks, Joseph D 1896

Weir, Robert S 1898

Welch, Ashbbl 1882

Wells, Bard 1893

Wendel, Dr. a 1881

Wendt, A. F 1893

West, A. R 1893

Wheatley, Charles M 1882

Wheeler, Moses D 1889

Wheelock, Jerome 1902

Whilldin, W. I 1882

Whitaker, Thomas D 1896

White, James B 1887

Whyte, John S 1902

WiESTLING, G. B 1891

Deceased.

WrLCOx, S 1898

Williams, Fbank 1901

Williams, Henby 1902

Williams, J. J 1892

Wilson, J. A 1896

Wilson, J.W 1894

WisTER, John 1900

WiTHERBEE, J. Gr 1875

Wood, James G 1899

Wood, W. Dewees 1899

Wood, Wm. J 1885

WooDEORD, Clarence A 1898

Worthington, Henry E 1880

Wright, Charles E 1888

Wright, Harrison 1885

Wrigley, H. E 1882

WuRTS, C.P. 1892

Yardley, Thomas W 1900

Young, James B 1902

LIST OS' MEETINfiS.

LIST OF THE MEETINGS OF THE INSTITUTE AND THEIK LOCAL- ITIES FROM ITS ORGANIZATION TO OCTOBER, 1902.

Transactions.

Number. Place.

Date.

VoL Page

I. Wilkes-Barre, Pa.*

May, 1871

II. Bethlehem, Pa

August, 1871

III. Troy, N. Y

IV. Philadelphia, Pa

V. New York, ]Sr,Y.*

May, 1872

VI. Pittsburg, Pa

VII. Boston, Mass

VIII. Philadelphia, Pa.*

May, 1873

IX. Easton, Pa

X. New York, N. Y

XI. St. Louis, Mo.*

XII. Hazleton, Pa

XIII. New Haven, Conn

XIV. Dover, N. J.*

May, 1875

XV. Cleveland, 0

XVI. Washington, D. C

February, 1876

XVII. Philadelphia, Pa.f

XVIII. Philadelphia, Pa

XIX. New York, N. Y

XX. Wilkes-Barre, Pa.*

May, 1877

XXI. Amenia, N. Y

XXII. Philadelphia, Pa

XXIII. Chattanooga, Tenn.*

May, 1878,

XXIV. Lake George, N. Y

October, 1878

XXV. Baltimore, Md.*

XXVI. Pittsburg, Pa

May, 1879

XXVII. Montreal, Canada

XXVm. New York, N. Y.*

XXIX. Lake Superior, Mich.,

XXX. Philadelphia, Pa.,*

XXXI. Staunton, Va

May, 1881

XXXII. Harrisburg, Pa

XXXIII. Washington, D. C.*

February, 1882

XXXrV. Denver, Col

XXXV. Boston, Mass.*

XXXVL Koanoke, Va

XXXVII. Troy, N.Y

XXXVIII. Cincinnati, 0.*

XXXIX. Chicago, 111

May, 1884

XL. Philadelphia, Pa

September, 1884

XLL New York, N.Y.*

Annual meetini: for the election of ofllcers. The rules were amended at the Chattanooga neeting, May, 1S78, changing the annual election from May to February, t Begun in May at Easton, Pa., for the election of officers, and adjourned to Philadelphia.

List Of Mbitings.

Transactions.

Number. Place.

Date.

Vol.

Page

XLII. Chattanooga, Tenn

May, 1885

SLIII. Halifax, N. S

September, 1885

XLIV. Pittsburg, Pa

February, 1886

XLV. Bethlehem, Pa

XLVL St. Louis, Mo

XLVII. Scranton, Pa*

XL VIII. Utah and Montana

July, 1887...

XLIX. Duluth, Minn

July, 1887

L. Boston, Mass.*

LI. Birmingham, Ala

May, isk

LII. Bufialo, K Y

LIII. New York, N.Y*

LIV. Colorado

LY. Ottawa, Canada

October, 1889

LVI. Washington, D. C

LVII. New York, N.Y

LVIII. New York, N.Y.*

LIX. Cleveland, 0

LX. Glen Summit, Pa

LXI. Baltimore, xMd.*

LXII. Plattsburgh, N. Y

xxxiu.

LXIIL Beading, Pa

LXIV. Montreal, Canada*

LXV. Chicago, 111

LXVI. Virginia Beach, Va

LXVn. Bridgeport, Conn

LXVm. Floridaf

LXIX. Atlanta, Ga

October, 1895

LXX. Pittsburg, Pa.*

February, 1896

LXXI. Colorado

LXXir. Chicago, 111

February, 1897

LXXIIL Lake Su perior

LXXIV. Atlantic City, N.

LXXV. Buffalo, N.Y.

October, 1898

LXXVL Xew York City*

LXXVII. California

LXXVIII. Washington, D. C.*.

.Xxx.

LXXIX. Canada

August, 1900

LXXX. Eichmond, Va,*

February, 190L

LXXXI. Mexico...

November, 1901. .xxxi. andxxxii.

LXXXII. Philadelphia, Pa.J

...May, 1902.

LXXXIII. New Haven, Conn

October, 1902

xxxiii*

Annual meeting for the election of officers.

t Begun in February at New York City, for the election of officers, and adjourned to Florida.

“ to Philadelphia.

Publications.

The publications of the Institute comprise :

Pamphlets.

1. The minutes of the Proceedings of each Meeting.

2. Such of the papers presented or read by title at each Meeting as are furnished by the authors and approved by the Council for full publication. (In nearly all cases in which papers, the titles of which appear in the Proceedings, are not subsequently published, they have been withdrawn by the authors.) These papers are pub- lished separately in pamphlet form, and are marked subject to revision.” Beyond the edition distributed, without charge, to mem- bers and associates not in arrears, a small supply is retained to meet subsequent demand. There are no copies on hand of papers read before 1880. The stock is nearly complete from 1880. These papers are for sale at the office of the Secretary, or are sent to pur- chasers by mail or express, charges paid, on receipt of the price, as follows :

No. OF Pages.

Single Copies.

10 Copies.

20 Copies.

8 or less

$0 10

$0 60

Si 00

9 to 12 inclusive

13 to 16 “

17 to 20 ‘‘

21 to 24

; 0 20 j

25 to 40 “ !

41 to 56 “

57 to 72 “

73 to 88 1

89 to 104 “

! 0 45

105 to 120 “ !

Papers with, folders and inserted plates subject to special price.

Transactions.

The volumes of Transactions, which are published annually, con- tain the list of officers, rules, etc., the Proceedings, and the papers revised for final publication. (In this revision, after the prelimi- nary publication, authors are permitted to use the largest liberty ; and the changes and additions made in papers are sometimes im- portant. It should be borne in mind by those who study or quote a paper in the preliminary edition, that they may not have in that form the ultimate and deliberate expression of the author's views. It should be added, however, that in the majority of cases there are no important changes.) These volumes are for sale as follows, in paper covers :

Publications.

Vols. I. to IV., inclusive, each, $3 00

Vols. V. to VIII., inclusive, each, 4 00

Vols. IX. and X. (a small supply only on hand), . . 10 00

Vols. XI. to XXIX., inclusive, each, 5 00

Vols. XXX. and XXXI., each, 6 00

Vol. XXXII., 5 00

Half-morocco binding, $1 extra per volume.

Indexes and Special Editions.

Index, Vols. XVI, to XX., inclusive, paper, . . . . $1 00

Index, Vols. XXI. to XXV., inclusive, cloth, . . . 1 25

Index, Vols. XXVI, to XXX., inclusive, cloth, . . . 1 50

Indexes, Vols. I. to XV., XVL to XX., XXI. to XXV.,

XXVI. to XXX , bound in one volume, cloth, . . 4 00

“ The Genesis of Ore-Deposits,’ comprising the famous treat-

ise of the late Professer Franz Posepny, with the suc- cessive discussions thereof by Le Conte, Blake, Winchell,

Church, Emmons, Becker, Cazin, Kickard and Raymond (all of which were published in Volumes XXIII. and XXIV. of the Transactions of the Institute, and subse- quently in the special “ Posepny Volume,” issued by the Institute) ; also, later papers by Van Hise, Emmons,

Weed, Lindgren, Vogt, Kemp, Blake, Rickard and others, and the discussions of these papers by De Launay, Beck, and many others (some of these were included in Vol- ume XXX. and the balance will appear in Volume XXXI.) ; also a complete bibliography of the Institute papers and discussions on this subject from 1871 to the present time.

The original Posepny volume comprised 265 pages, and was sold for $2.50, at which price the edition was long since exhausted. The present volume is an octavo of 825 pages, bound in book-linen,” of the same color as the standard binding of the Transactions, . . . 6 00

Half-morocco bound copies, 7 (K)

“The Evolution of Mine-Surveying Instruments.” This is a volume of about 400 pages, issued in the same style as the foregoing, and containing the original paper of Mr. Dunbar D. Scott on that subject {Transactions, XXVIII.), first published in 1898, togetlier with later papers, continuing the same subject, and discussions thereof, by Hoskold, Lyman, Davis and many others.

Memorial of Alexander L. Holley, with portrait, clotii, . 1

Glossary of Mining and Metallurgical Terms (1881), doth, 50 List of Members, Rules, etc., paper, 50

Publications.

Authors’ Editions of Pamphlets.

Extra copies, when ordered before the printing of the pamphlet edition, are furnished to authors, under Rule VII., at the following rates :

No. OP Pages.

50 Copies.

100 Copies.

250 Copies.

Each addi- tionallOOcopies above 250.

4 or less

$1 25

$1 50

$2 25

So 50

5 to 8 inclusive

9 to 12 “

13 to 16 “

17 to 20 “

21 to 24 “

25 to 28 “

29 to 32 “

Covers (including print- ing on first page of the

saine), extra

Papers with folders and inserted plates subject to special price.

All communications and remittances should be addressed to R. W. Raymond, Secretary, 99 John St., or P. 0. Box 223, New York City,

H

Rules

ADOPTED MAY, 1873. AMENDED MAY, 1875, 1877, AND 1878, FEBRUARY, 1880, 1881 , 1887, 1890, AND 1896.

Objects.

The objects of the American Institute of Mining Engineers are to promote the arts and sciences connected with the economical production of the useful min- erals and metals, and the welfare of those employed in these industries, by means of meetings for social intercourse, and the reading and discussion of professional papers, and to circulate, by means of publications among its members and asso- ciates, the information thus obtained.

Membership.

The Institute shall consist of Members, Honorary Members, and Associates. Members and Honorary Members shall be professional mining engineers, geolo- gists, metallurgists, or chemists, or persons practically engaged in mining, metal- lurgy, or metallurgical engineering. Associates shall include all suitable persons desirous of being connected with the Institute, and duly elected as hereinafter provided. Each person desirous of becoming a member or associate shall be pro- posed by at least three members or associates, approved by the Council, and elected by ballot at a regular meeting (or by ballot at any time conducted through the mail, as the Council may prescribe) upon receiving three-fourths of tlie votes cast, and shall become a member or associate on the payment of his first dues, P>ch person proposed as an honorary member shall be recommended by at least ten members or associates, approved by the Council, and elected by ballot at a regular meeting (or by ballot at any time conducted through the mail, m the Council may prescribe) on receiving nine-tenths of the votes cast ; JFVow’dad, that the number of honorary members shall not exceed twenty. The Council may at any time change the classification of a person elected as associate, so as to make him a member, ov me versa subject to the approval of the Institute, All members and associates shall he equally entitled to the privileges of membership ; Proinded that honorary members shall not he entitled to vote, and members or associates whose post-office address shall be outside of the United States, Canada and Mexico shall not he entitled to vote by mail, except upon proposed amendments to the Rules.

Rules.

Any member or associate may be stricken from tbe list on recommendation of the Council, by the vote of three-fourths of the members and associates present at any annual meeting, due notice having been mailed in writing by the Secretary to the said member or associate.

Dues.

The dues of members and associates shall be ten dollars, payable upon their election, and ten dollars per annum thereafter, payable in advance on the first day of each calendar year. Honorary members shall not be liable to dues. Any member or associate not in arrears may become by the payment of one hundred dollars at one time a life-member or associate, and shall not be liable thereafter to annual dues. Any member or associate in arrears may, at the discretion of the Council, be deprived of the receipt of publications, or stricken from the list of members when in arrears for one year ; Provided, that he may be restored to mem- bership by the Council on payment of all arrears, or by re-election after an interval of three years.

Officers.

The affairs of the Institute shall be managed by a Council, consisting of a Presi- dent, six Vice-Presidents, nine Managers, a Secretary and a Treasurer, who shall be elected from, among the members and associates of the Institute at the annual meetings, to hold office as follows :

The President, the Secretary, and the Treasurer for one year (and no person shall be eligible for immediate re-election as President who shall have held that office subsequent to the adoption of these rules, for two consecutive years), the Vice-Presidents for two years, and the Managers for three years j and no Vice- President or Manager shall be eligible for immediate re-election to the same office at the expiration of the term for which he was elected. At each annual meeting a President, three Vice-Presidents, three Managers, a Secretary, and a Treasurer shall be elected, and the term of office shall continue until the adjournment of the meeting at which their successors are elected.

The duties of all officers shall be such as usually pertain to their offices, or may be delegated to them by the Council or the Institute ; and the Council may in its discretion require bonds to be given by the Treasurer. At each annual meeting the Council shall make a report of proceedings to the Institute, together with a financial statement.

Vacancies in the Council may occur by death or resignation ; or the Council may, by a vote of the majority of all its members, declare the place of any officer vacant, on his failure for one year, from inability or otherwise, to attend the Council meetings or perform the duties of his office. All vacancies shall be filled by the appointment of the Council, and any person so appointed shall hold office for the remainder of the term for which his predecessor was elected or appointed ; Provided, that the said appointment shall not render him ineligible at the next annual meeting.

Five members of the Council shall constitute a quorum ; but the Council may appoint an Executive Committee, or business may he transacted at a regularly dialled meeting of the Council, at which less than a quorum is present, subject to

Exiles.

the approval of a majority of the Council, subsequently given in writing to the Secretary, and recorded by him with the minutes.

Elections.

The annual election shall be conducted as follows : Nominations may be sent in writing to the Secretary, accompanied with the names of the proposers, at any time not less than thirty days before the annual meeting ; and the Secretary shall, not less than two weeks before the said meeting, mail to every member or asso- ciate (except honorary members) a list of all the nominations for each office so received, together with a copy of this rule, and the names of the persons ineligible for election to each office ; and if the Council, or a Committee thereof, appointed for the purpose, shall have recommended any nominations, such recommendation may also be sent to members and associates with the said list of all nominations made, but not upon the same paper. And each member or associate, qualified to vote, may vote, either by striking from or adding to the names of the said list, leav- ing names not exceeding in number the officers to be elected, or by preparing a new list, signing said altered or prepared ballot with his name, and either mail- ing it to the Secretary or presenting it in person at the annual meeting ; Provided that no member or associate in arrears since the last annual meeting shall be allowed to vote until the said arrears shall have been paid. The ballots shall be received and examined by three Scrutineers, appointed at the annual meeting by the presiding officer ; and the persons who shall have received the greatest num- ber of votes for the several offices shall be declared elected, and the Scrutineers shall so report to the presiding officer. The ballots shall be destroyed, and a list of the elected officers, certified by the Scrutineers, shall be preserved by the Secretary.

Meetings.

The annual meeting of the Institute shall take place on the third Tuesday of February, at which a report of the proceedings of the Institute and an abstract of the accounts shall be furnished by the Council. Other meetings shall be held in each year, at such times and places as the Council shall select, and notice of all meetings shall be given by mail, or otherwise, to all members and associates, at least twenty days in advance.

Every question which shall come before any meeting of the Institute, shall be decided, unless otherwise provided by these Eules, by the votes of a majority of the members then present. Any member or associate may introduce a stranger to any meeting ; but the latter shall not take part in the proceedings without the consent of the meeting.

Papers And Publications.

The Council shall have power to decide on the propriety of communicating Uy the Institute any papers which may be received, and they shall beat liberty, when they think it desirable, to direct that any paper read before the Institute shall

Euleb.

be printed in the Transactions. Intimation, when practical, shall be given, at each general meeting, of the subject of the paper or papers to be read, and of the questions for discussion at the next meeting. The reading of papers shall not be delayed beyond such hour as the presiding officer shall think proper ; and the election of members or other business may be adjourned by the presiding officer, to permit the reading and discussion of papers. The published papers and yoT umes of Transactions shall be distributed to all members and associates not in arrears, and may be sold to the public upon such conditions as the Council shall prescribe ; but the Council may, in its discretion, omit sending to members and associates outside of the United States, Canada and Mexico, special circulars, unless the same contain proposed amendments to the Kules.

The copyright of all papers communicated to, and accepted by, the Institute, shall be vested in it, unless otherwise agreed between the Council and the author. The author of each paper read before the Institute shall be entitled to twelve copies, if printed, for his own use, and shall have the right to order any number of copies at the cost of paper and printing, provided said copies are not intended for sale. The Institute is not, as a body, responsible for the statements of fact or opinion advanced in papers or discussions at its meetings, and it is understood that papers and discussions should not include matters relating to politics or purely to trade ; nor shall the Council or the Institute officially approve or dis- approve any technical or scientific opinion or any proposed enterprise outside the management of the meetings, discussions and publications of the Institute, as pro- vided in these Eules ; Fromded however, that committees may be appointed by the Council or the Institute to make investigations and submit reports at meetings ‘ of the Institute ; but no action shall be taken binding the Institute for or against the conclusions of any such reports.

Amendments.

These Eules may be amended at any annual meeting by a two-thirds vote of the members present Provided, that written notice of the proposed amendment shall have been given at a previous meeting ; and Provided, also, that the amendment or amendments so adopted shall be printed upon a ballot and sent, not later than the next distribution of printed matter, to all members and associates not in arrears for the preceding year (except honorary members and foreign members elected before February, 1880), and each person receiving the same shall be requested to return it to the Secretary with his written vote of Yes or No to each amendment, and his signature ; and the President shall appoint as Scrutineers three members or associates, who shall examine all of the said ballots which shall have been re- turned within one month from the date of their distribution, and shall report the result ; and the Secretary shall publish and distribute to members, not later than the next distribution of printed matter, an announcement of the said resxilt so re- ported, together with the text of the additional or amended rule or rules so adopted; and the amendment -or amendments approved by the majority of the ballots so returned and reported shall become part of these Eules from and after the publication of said announcement by the Secretary.

Proceedings of the Eighty-First Meeting, Mexico, November, 1901.

Honobaby Fbesidents Of Entebtatnment Committees.

Hon, Leandko Fernandez, of Fomento,

Hon. Jose Ives Limantoitr, 3Iinister of Finance.

Hon. Justino Fernandez, Minister of Justice and Fithlic Instruction.

Hon, G-dillebmo db Landa y Escand6n, 3Iayor of the City of Afexico.

Carlos F. de Landero, E.M., C.E., Vice-Fresident of the Institute.

Committees.

Local Committee of the City of Alexico. — Board of Directors : Victor M. Braschi, Fresid&nt; Ezequiel Ordonez, First Viee-Fresident ; Edmundo Girault, Second Vice-Fresident ; Henry M. Stanley, Secretary; John F. Allan, Treasurer; Manuel Fernandez Leal, Manuel Maria Contreras, Andres Aldasoro, Joaquin Beltran, Gilberto Montiel, Joaquin Bamos, Jose G. Aguilera, Eduardo Martinez Vaca, Alberto Hoppenstedt, Gabriel Mancera, Federico Albert, Leon Signoret, Ever- ardo Hegewiscli, G. M. Stewart, H. K. Nickerson, Tomils Braniff, Gabriel Mor- ton, J. H. Hampson, Tomas J. Eyder, I. J. Seligman, Jos de Landero y Cos, Sebastian Camacho, Telesforo Garcia, George D. Barron, Andres Bermejillo, Alberto Cagiga Berruecos, Emilio Elcoro, Guillermo Portilla, J. L. Phillips, Jos Castellot, George Cook, W. W. Graham, J. C. Mordough, General John B. Frisbie, Charles Clegg, Major ll. B. Gorsuch, L. L. Ward, John E, Davis, Othon Bercht, Eobert Hay Anderson, E. M. de Arozarena, W. M. Brodie, Eichard E. Chism, James G,. Hardy, Charles Ivleinschmidt, Gustavo Tliorkild- sen, E, F. Ayton, A. B, Carpenter, Charles E. Coxe, Luis V. Emanuel, P. L. Foster, Philip W. K. Eobertson, August Sahlberg, George P. Chaplin, P. Eioseco, Arthur Chippendale, Godfrey T. Vivian, Stephen W. Stackpole, Julius E. Ambrosias, Hon, Leandro Fernandez, Hon. Jose Ives Liman tour, Justino Fernandez, Guillermo de Landa y Escandon and Carlos F. de Landero.

Local Committee of Chihuahua. — Gobernador Miguel Ahumada, Enrique C. Creel, Cruz Gonz£ez, Guadalupe Gonzalez, Forbes Rickard, G. D. Meiklejohn, R Anderson, Col John Weir, Col. W. W. Mills, C. Sheldon, Lorenzo J, Arel- lano, Carlos F. de Landero, J. M. Sanchez, Oton Sarto rius, E. IL Cook, Juan A. Creel, A. H. Kraft, Pedro E. Prieto, Manuel Gameros, Salvador Arellano, F, P. Mattox, W. H. Kraft, W. T. Lampe, J. W. Malcolnison, Capt. C. G. Scobell, E. M. Dudley, C. L. Graves, J. M. Wilson, R. J. de Morambert, J. D. McKenzie, Martin Falomir, Jesus Falomir, Juan Terrazas, Federico Terrazas, Juan H, Faudoa, Alberto Terrazas, Sergio Sinchez, Jos. Elexire, W. G. Gibson, J. G. Sample, Luis de la Garza Cardenas, P. S. Kirkland, J. M. Pender, Vicente Hor- casitas, J, Pothast, A. C. Nash, J. F. Treviho, F. H. Husted, Victor Gabrero, Carlos Guilty, Harvey B. Lawrence, Schuyler B. Lawrence, E. W. Iliff, Charles C. Seawell, G. C. Harding, Benig Perez Gil, G. C. Moye, Cl M. Bojas Vertiz, Juan de Dios de Milicua, Guillermo Kraft, Jesus Acosta, J. IL Williamson, Alfredo Kraft, J. D. Meiklejohn, H. Anderson, Jos4 D. Riego, Dr. Francisco Armendariz, Santiago S. Cardenas, George F, Brittingham, Eduardo Guilty, Manuel Gameros, Salvador Atelano, P. P. Mattox.

Proceedings Of Mexican Meeting.

Local Committee of Parral. — Tito Arriola, Jose Maria Botello, Angel Garcia, Juan Almanzan, Pedro Alvarado, Norberte Domingues, Francisco Gomez, Jos6 Larroque, Wenceslao Fuentes, D. Garmendia, Felipe Arellano, Guadalupe Bios, Eamon Gonzalez y Salas, R. J. Long, W. W. Emery, G. A. Burr. Joseph Freu- denstein, G. P. Mackie, Charles Preusse, Spencer Cragoe, A. E. Swain, Charles Stork, J. E. Cunningham, William C. Beckman, J. P. Cruger, H. Wendler, N. H. Emmons 2d, J. I. Long, J. Flynn, Carlos Dietmar, J. L. Helm, Edward L. Bufourc, E. M. Evans, Leopoldo Iwonsky, Jose Palacios, M. A. Warner, E. O. Matthews, D. W. Grubbs, T. H. Thatcher.

Local Committee of Pachuca. — Felipe N. Barros, Edmundo Girault, R. Moore, Rafael Flores Alatorre, Ignacio Symonds, Adrian Parres, E. Watters, Enrique Quintanilla, E. Zuloaga, C. Sanchez Mejorado, A. Irizarri, G. Blumenau, A. Spamer, F. 0. Renstron, Aquilino Parres, N. Morton, T. Brademburg, J. San- chez Mejorada, F. Hernandez, Jr., R. Torres, P. A. Gutierrez, Luis Carriom, J. Gonzalez, A. Romera, Dr. Augustin Navarro Cardona, J. Perez Duarte, H. Rodriguez, R. M. de Arozarena, FroiUn Jimenez, Jesus Manzano, Manuel Teja, Pablo Northey, Dr. J. de da P. Jimenez, Alberto Espinosa, Joaquin Martinez, Eduardo del Corral, Miguel M. Bracho, Fernando P. Tagle, Luis Hernandez, Augustin Straffon, Ignacio M. Arciniega, Alvaro Rodriguez, Leoncio Hernd-ndez, Alejandro Mondoza, Joaquin Lara, Leonardo Rubio, Manuel Islas, Joaquim Calero, Miguel Alvarez, Jesus Gil, Manuel Ortega Filio, Eduardo Luque, Ramon Revilla, Jesus Icaza, Javier Rosete, Jesus M. Fraustro, Antonio Ramiro, Silvestre Garcia, Arturo Viniegra, Leopoldo Rosales, Ramon Rosales, Trinidad Hidalgo, Antonio Ramiro, Vicente 1. Islas, Nemesio Agnilar, Francisco J. Velez, Perfecto C. Omanda, Rafael Aguilar, Vicente Madrid, Jesus Rodriguez, Francisco tSessom, Rodolfo Munoz, Alfredo Bishop, Pedro Rioseco, Jos4 Calero, Raul Prieto, Rafael Salazar, Juan Barron, Manuel Ordohez, Francisco C. O’Gorman, Francisco J. Velez, Ignacio Rivera, Juan Hales, Augustin Inurritegui, Tomas Soloman, Jaime Bennets, Juan Bennets, Jr., Guillermo Dawe, Carlos Dawe, R. Skewes, Juan Gundry, Josd Granados, Francisco Rule, Alfonso Granados, G. Bayona, Guillermo Rule, Francisco H. Rule, Enrique Arthur, Juan Pratt, Vicente Roqueni, Doctore Manuel Majera, Gonzalo Castaneda, Arturo Stockdale, Salvador Jim4nez, Francisco Rosete, Gabriel Revilla, Guadalupe Sanchez, Ramon Casteneda y Pal- omar, Trinidad Vazquez, Juan C. Rule, F. C. Jaggy, Trinidad Hidalgo, Enrique Bunt, Juan E. Contreras, Ignacio Blancas, Nye’ Morton, Horatio Symonds.

Local Committee of Guadalajara. — Gabriel Castanos, President; Ignacio Guavara, Vim-President ; Ambrosio Ulloa, Secretary; Gabriel Castillo, Ignacio Guavara, Juan Jo8(S Matute, Mariano Schiaffino, Daniel V. Navarro, Rafael de la Mora ; also the members of the Society of Engineers and leading merchants and bankers.

Local Committee of Guanajuato. — Ponciano Aguilar, Joaquin Parres, Roberto Fernandez, L. M. Cockerell, Manuel L. Ajuria, Pfo R. Alatorre, R4mon Alcazar, Manuel Antill6n, Manuel Aranda, Manuel Balarezo, G. W. Bryant, Andres Bravo, Juan Castelazo, Ernesto Castelazo, Rodrigo Castelazo, Francisco Castro, Ricardo Chico, Juan N. Contreras, Cornelio Cornejo, Alex. J. Gumming, Edu- ardo Gumming, Amado Delgado, Dwight A, C. Furness, Jestis Fernandez, Juan M. Garma, Enrique Glennie, Ricardo A. Glennie, Luis Gderne, Vicente GonzMez, Felipe Gonzilez, Ignacio Ibargiiengoitia, Ignacio A. Lozano, Enrique Medina, M. E. McDonald, Enrique Martinez, G. W. McElhiney, Pablo Orozco, Pablo Parkman, Fernando Parkman, Samuel A. Parkman, Jos4 A. Pesquera, Ignacio Rocha, Atanasio Rocha, Carlos Robles, Francisco Reynoso, Eusebio Rojas, Luis Silva, Amado Saavedra, Ignacio Sanchez.

€Xx

PROCEBDINaS OF MEXICAN MEETING.

Local Committee oj J..( 7 U(xscafoi 6 s. —Alejandro Vasquez del Mercado, Alberto M. Bavalos, Jos4 Maria Gonzales, Ignacio Bios e Ibarrola, Tomas Medina Ugarte, Carlos M. Lopez, Enrique C. Osornio, Leandro Carbo, J os M. Alarco, Mariana Cordova, Felipe E. Chavez, William A. Pratt, Eobert Brendel, G. C. Eaufman, C. F. Westlund.

Local Committee of San Luis PotosL — Ing. I). Bias Escontria, A. S. Dwight, Eoberto Ipina, D. C. Brown, D. Luis C. Cuevas, Francisco CogMan, E. Gmelin, Adolfo Martinez, E. H. Messiter, F. H. Taylor, C. M. Van Cleve.

Local Committee of Mont&'ey,—0. Piaccini, Ismael Guerra, Luis Guimbarda, Pedro Lambreton, Jose Armendaiz, Gustavo Dresel, E. L. Kayser, Fernando Martinez, Jas. M, Morlan, Ernestro Madero, Bernardo Eeyes, Jr., Andres Garza Galan, Genaro Davila, Federico Padilla, Eomulo Padilla, Manuel Gomez.

The first session was held in the Hall of Councils of the School of Engineers,* in the City of Mexico, on Saturday even- ing, November 9.

Engineer Don Augustin Aragon, in behalf of the Minister of Fomento.t the Society of Engineers and Architects, the Acad- emy of Science, and the National School of Engineers, deliv- ered in Spanish an address of welcome, which was repeated in English by Mr. Victor M. Braschi, President of the Local Com- mittee, as follows :

Members of the American Institute of blininff Engineers :

Owing to the fact that I have the rare good fortune to belong to the Society of Engineers and Architects and to the Academy of Physical and Natural Science,

The School of Engineers, formerly the School of Mines, is the oldest teclini- cal educational institution in America. It was organized by Don Joaquin Velaz- quez Cardenas y Leon, the first classes being opened in 1792. In 1813 the present imposing structure was completed. The central vestibule gives access to a magnificent open patio or court, surrounded by arches, four minor courts fur- nishing light and ventilation to the other departments. The central part of the structure alone is occupied by the National School of Engineers, which is very well equipped. In the main entrance and in front of the principal stairway are the three famous Mexican meteorites found in the State of Chihuahua, the largest weighing over 14 tons.

It is worthy of mention that the beautiful Hall of Councils bad been ho re- cently completed that the sessions of the Institute, held therein, practically con- stitiitcd its most appropriate dedication to the purposes for which it was de- signed.

t This comprehensive term can scarcely be expressed by an English synonym. Perhaps the nearest would be Encouragement’* ; in fact, the department of the Eepublic bearing this title has charge of matters relating to the promotion of national industries, and is analogous, tliough not exactly similar, to the U. S, Department of the Interior.

Proceedings Of Mexican Meeting.

to the further fact that I have received my professional education in the National School of Engineers, and that I belong to the staff of employes of the Depart- ment of Fomento, I have been entrusted, in the name and on behalf of all the above-named institutions and of the Minister of Fomento, with the honorable and gratifying duty of welcoming you upon your arrival in this capital, where we hope and desire that you may be welcomed with the cordial hospitality to which you are entitled as the representatives of a famous and meritorious organization.

‘We hope that your visit to this country may not only be pleasant to you by reason of our fine climate, our beautiful scenery and historical associations, but also instructive in the science and art which are your specialty, and which, by your perseverance, your energy, and your ability, you have carried in the United States to an astonishing degree of perfection.

“ Undoubtedly travel and excursions form unimportant factor of education and amusement. To the engineer they are also a source of economic utility, in- asmuch as, by visiting new localities and new countries, he is enabled to judge personally of industrial methods, of the progress of applied science, and the con- ditions of life among his professional brethren who may be more, or perhaps less, favored by fortune than he ; and if, among the faculties which he has culti- vated, he possesses that of observation, he receives from travel a practical lesson of the most varied and useful kind.

We hope that beneath the perfect skies of our fatherland you will find not only the rest to which your active lives in your homes beyond the Bravo entitle you, but also food for instructive reflection suggested by the contrast between that which you are about to see and that which you are accustomed to contemplate in your own country. Here you will see the historical mines opened up shortly after the conquest, and the mining and metallurgical methods of the same epoch born of necessity (which, as you well know, is the mother of invention), in order to administer to the aggressive energy of our indomitable conquerors. Side by side with those glorious relics of past ages you will, in your visits to our mining localities, observe all the appliances with which modern science and art have prodigally enriched the mining industry, both for the exploitation of mineral deposits and the reduction of the ore, all of which appliances are, of course, en- tirely familiar to you.

Seeing that I have referred to past times, it may not be surperfluous to recall one or two dates in the history of mining in Mexico, not boastfully, but in proof of the claim freely accorded to us of being the pioneer miners of the New World, 1 desire to refer to the first coinage of money here in the year 1537, the discovery of the system of amalgamation by Bartolome de Medina, in 1557, at Pachuca, and the opening of the School of Mines on January 1, 1792.

“ In a country like Mexico, which possesses almost all known kinds of miner- als, and among whose industries mining occupies in every sense the foremost rank, men who devote their thoughts and labors to the subject cannot but rejoice at being visited by persons so thoroughly versed as yourselves in all the branches of knowledge connected with the rational exploitation of metalliferous forma- tions, ranging from the fundamental data of geology to the metallurgy of the in- dustrial product, and from mineralogical prospecting to the installation of huge and complicated machinery destined to overcome natural obstacles.

‘‘In proof of my assertion, I would point to the presence at this inaugural ses- sion of the distinguished citizen who administers the department which has charge of the mining interests of the country, and of the esteemed Director and President, as well as the members, of the three corporations on whose behalf I am addressing you, and which, by reason of their object, are intimately connected

CXXll

Proceedings Of Mexican Meeting.

with the scientific studies of mining in its varied aspects. Another proof of the interest felt in your work is the fact that the Supreme Government, through the Department of Justice and Public Instruction, has placed at your disposal for your meetings this, the auditorium of the old School of Mines.

“In connection with the conquests which mining has achieved in overcoming the forces of nature, either by deviating their course or moderating their inten- sity, permit me to say a few words with regard to the social and moral conse- quences of these conquests.

“The phenomena of nature are greatly modified by the action of man upon the planet, and it is precisely that struggle (never absent from mining operations) against the natural medium (which, even under the most favorable circum- stances, does not yield the richest fruits of which it is capable, save in response to man’s efforts) that constitutes the essential basis of the progress of nations.

“ It is clear that that struggle must be in inverse ratio to the facilities which the soil and climate offer to mining operations and to tlieir adaptation to man’s wants, and that, therefore, there are countries where greater energy is needed than in others which are less unpropitious, as undoubtedly, in comparison with Mexico, are not a few of the countries of Europe and America. But if this cir- cumstance explains a certain backwardness in the development of the less favored country, and to a certain degree lessens its responsibilities, seeing that it has had to contend with greater difficulties, it obliges it, on the other hand, morally speaking, to more constant and sustained efforts, a view to overcoming its natural obstacles. TJius, the first and most important social question for each nation is, how to modify the physical medium in which it lives ; and it must devote to that task, which is the foundation of all national development, the greater part of its strength and attention This is hov the nations that have been most conspicuous in history have acted ; so much so that many of them, occupying regions possessing few natural advantages, owe their position simply to the efforts of their people.

“ The United States has had as natural allies in its successful development the fertility of its territory, its great rivers, the abundant supply of subterranean water in many regions and the mineral wealth of its soil ; all of which things have contributed so largely to its industrial expansion. Another powerful factor in its favor is the immense extent of its coasts, offering unrivaled opportunities for the development of commercial navigation.

“Mexico is not so favorably situated, except with respect to its mineral wealth ; for, although it has a great extent of coast, its shore line is not indented in such manner as to facilitate commerce and navigation. Thus it is that natural condi- tions have from the earliest times marked out the fundamental laws which, under penalty of great evils, each nation must obey in the process of its orgaiuzation and development.

“And seeing that the similarity of the sub-soils of our respective countries and their proximity have given rise to a reciprocal interest in learning the condition of one another’s mining industry, we consider it to be a duty on our part to throw open to you our museums, our mines and our reduction works, in order that you may inspect our mineral collections, our systems of mining, our metallurgical processes ; for the interchange of ideas incidental to this class of reunions is not the least of their advantages.

“Our ancestors were accustomed to inaugurate every important enterprise, every momentous occasion, every useful institution, with the ceremonies of religion. Their fervent piety considered nothing to be noble, great nor sublime unless undertaken under the auspices of the Divine favor. Nowadays, we place

PEOCEEDINGS OF MEXICAN MEETING. CXxiii

ourselves under tlie fegis of science ; and those of us who march under its colors with or without theological creed or political aj05.1iations, invoke, above all things, when we meet to discuss and promote the welfare of mankind, the spirit of inter- national co-operation which reunions of this kind tend to propagate, gathering as they do together, from diSerent countries, men devoted to the cultivation of science — that treasure-house enriched by the patient accumulations of savants during the course of the centuries, and fortified by the indestructible hope of the ultimate brotherhood of man.

We confidently hope that the fraternization of men of science in the United States and Mexico may ever grow closer, and we look for even pleasanter days in the future than those which we are about to enjoy on the occasion of your first collective visit. What rtU does the future reserve for our countries, and what will be, for us, the complexion of the ages to come The course of history does not warrant prophecies, but a careful study of past ages frequently affords an insight into future probabilities ; and when, in all ages, throughout every crisis, in every medium, we observe that the language in which men have most univer- sally reached a common understanding is that of science, we may fairly conclude that the apostleship of fraternity in future ages is reserved for the men who faithfully, earnestly and enthusiastically devote their lives to the study of natural phenomena.

We receive you, therefore, as professional brethren, and as intellectual sons of the same century. Welcome, therefore, to you members of the American In- stitute of Mining Engineers ; and during your stay in our midst we hope not only that our scenery may delight you and our welcome gratify you, but that it may also be attended with intellectual results ; for thus, upon returning to your home, you will carry with you grateful memories of your excursion to Mexico, and will be missionaries to tell of the cordial welcome here extended to men of science, particularly to those who are living examples of the motto on which every intellectual worker ought to pride himself : ‘ For Science, Fatherland and Humanity.’ ’’

111 responae to this address, President E. E. Olcott made, in Spanish, the reply, of which the following is a translation :

‘Honorable Ministers of the Government, Members of the Academy of Sciences, of the Association of Engineers and Architects, and the Faculty of the National School of Engineers, and Other Distinguished Citizens of the BepuUic of Mexico.

‘ ‘ Gentlemen : It is inspiring that this first meeting of the American Institute of Mining Engineers in Spanish America should be convened in the Mexican National School of Engineering, formerly the School of Mines.

We, on our side of the Rio Grande, have something to be proud of in the magnitude of our operations and in the rapid advance which we have made not only in mining engineering, hut along all lines. It is wholesome that we should assemble here before this brilliant audience, and should turn our thoughts back- ward and consider what we owe to the Latin races for our start. Was it not your Spanish ancestors who discovered the shores of the western hemisphere, and was not their quest for gold one of the great moving causes which lured them on? Our institutions, our great mining enterprises, dtae hack but a few decades, while you can point out operations that have been moving along steadily for hundreds of years.

When we discovered the Comstock Lode and our other western mines of early

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Pbooebdings Of Mexican Meeting.

date, There did we get our first miners, except from this country, where we are now so royally entertained ? And when it came to treating our ores, on whom did we call for knowledge but on the Mexicans, who taught us the patio process, which we modified into the Washoe pan— merely your arra&tre made of iron. Since then we have learned to love the term 'Pan and we prefix it to all our Congresses and all our Expositions 1 In early days we used it with reference only to the grinding and amalgamation of our silver-ores ; but now the magic syllable is making of the peoples of all the western hemisphere a people of one interest in developing the immense riches with which nature has blessed us.

Where did we get much of our nomenclature, if not from the beautiful Span- ish language? Have we not received our bonamas from you? Are there not more, hidden in your mighty mountains, which all of us wish to see developed in the best, most economical and most profitable manner ?

'‘We did not, unfortunately, found our mining law on yours ; if we had done so, the vexatious perplexities of the ‘apex-question’ would have been avoided, and the rational, understandable, rectangular claims would have been adopted.

“With a history in mining which surpasses all, with a present of tremendous importance, and with a future of brightest promise, Mexico is par excellence the

Mecca for a congress of mining pilgrims.

' ‘ This magnificent edifice was erected for the accommodation of mining stu- dents before our people had awakened to the idea of our own possessions of mineral wealth. It behooves us Americans, then, to put away arrogance, as we enter your portals; to tread lightly the sacred halls; to look in reverence on your institutions, and to learn well the lessons which you can still teach us, of systematic perseverance. We are energetic, and wish to rush through our work in minutes ; but we have much to learn from those who display the beautiful grace of patience.

“ This meeting stands historically for several things. It marks the beginning of the thirtieth year of our Institute ; it marks the opening of the momentous twentieth century ; it marks the heartier co-operation of tlie different nations on this side of the Atlantic.

" If your progress and ours has been so great in the past thirty years, what maybe expected in the first thirty years of tliis new century? ‘Strcngtli begets strength.’ 'Well begun, half done.’ You have advanced prodigiously of late. National and commercial ratings are such that the founding of enterprises of all sorts is easier and the interest charge not so serious as in former times. The mul- tiplication of quicker methods of communication has not only developed your resources, but has also put the menace of rebellion further away.

“Our tariff legislation put a high duty on lead-ores, and attracted capital to establish immense smelting-works, which have gotten you a market close at hand for your ores. Compare your adobe furnaces, eight feet high, with the present ' hornos altos. And last, but not least, the maintenance of the highest national credit, under the guiding hand of the splendid statesman who holds the helm of the government— and the honorable payment of your public debt.

“ It marks you a people that must be reckoned with. Mexico, like the United States, is suffering from an embarrassment of riches. No other nations on earth have to bother their heads as to what disposition to make of their surplus.

' ‘ The grand engineering schemes undertaken in Mexico in the last few years have involved the placing of millions of money in public betterments,— nearly 140,000,000 for harbors, 8, 000,000 for canals.

'‘We want to learn, while here, why it is that in this happy land strikes arc

Proceedings Of Mexican Meeting.

Cxxv’'

unknown. It must be that sweet contentment blesses the hearthstone, and a man is free to go to his work as his needs and inclinations direct. May the blessings of this peace rest long upon you.

“There has been a notable increase of imports into Mexico from the United States, as against a large decrease of those from England and the comparatively small increase of imports from France, Germany and Spain. The same is true in regard to exports. There has been a phenomenal increase in the past two decades of metals and goods shipped to the United States, as against the bare maintenance, or a decrease, of the amount sent to Europe. We should not flatter ourselves in regard to this. Shame on us if it were not so, with our Juxtaposition and our railroads and steamship facilities ! But these conditions emphasize the necessity for more brotherly love between us, more helpfulness, less spirit of purely hostile competition, and more of mutual co-operation.

“ Mexico now ranks third among the corn-raising countries of the world. Ex- ports of agricultural products have more than doubled in the last eight years. The wonderful variety and quantities of what might be termed precious woods are a great source of national wealth, as is also the production of henequen, the annual sales of which have reached 33,000,000-

“ Mexico has been, and is to be, congratulated and highly complimented for the large part she has taken in that marvel of beauty, that climax of up-to-date sue-* cesses, the Pan-American Exposition at Buffalo. The spirit of the Pan-American idea, the spirit of hope engendered by that Rainbow City,’ was never so strong as now. Let us all make generous endeavor that it may be lived up to in spirit and in truth. One of the greatest bonds for the security, the welfare and the advance- ment of Pan-America is an interoceanic canal. It has been talked of so long that the language of the early promoters has become a quaint tongue. Let us hope and assist as we may that under our newer condition action of some sort may begin. May the scream of the bald eagle of the North call forth an echoing hello from his brothers of the South — not ever, we pray, in defiance, but in inspiring rivalry and neighborly co-operation.

“Whatever measure of success has come to us of the States, aside from our natural advantages, we almost with one accord attribute to our belief in God, in the truth, and in our common schools, which teach us to find, to measure and to know the truth. So here we find a nation so compactly situated and so all-suffi- cient in its resources that for hundreds of years she has lived largely for herself and to herself. She has been so hemmed in by unpropitious coast lines, moun- tainous borders and vast distances that international exchanges were difficult. Return cargoes for ships were hard to secure, as her chief products, although of great value, were of small bulk ; and so, until the advent of the great advance- agent of progress, the railroad, was begun over the length and breadth of the land, the vast wealth of many of her richest States lay dormant. Great men, great hearts and a great nation, not very many years ago, seemed to demand this newer life ; and all things seem to have worked together for the common advance, until now the call of progress is answered day by day, more and more, from every part of the united and splendid nation. Here, too, we find a devout nation, and here we see springing up on all sides the common schools, which, like ours, tend to broaden and make more tolerant the opinions and religious beliefs of the people.”

The session was concluded with a graceful address by Engi- neer Don Ezequiel Ordonez, sub-Director of the Geological In-

tn t,p nf M XI an.

CSXvi PROCEEDINGS OE MEXICAN MEETING.

The proceedings were interspersed with musical selections, executed by the admirable orchestra of the National Conserva- tory of Music.

The second session was held in the same place on Monday morning, November 11th. Abstracts of the following papers, prepared and presented by direction of the Minister of Fommto were read in Spanish by Engineer Don Ezequiel Ordonez :

Historical Sketch of Mining Legislation in Mexico, by Eduardo Martinez Baca.

The Geographical and Geological Distribution of the Mines of the Republic of Mexico, by Jose G. Aguilera.

The following papers were presented in printed form :

The Mexican Railroad System, by Victor M. Braschi, City of Mexico.

The Mexican National School of Engineers, by Ezequiel Ordonez, City of Mexico.

The Valley of Mexico, and the Federal District, by Ezequiel Ordonez, City of Mexico.

The third session was held in the same place, on Tuesday, November 12th. Prof. Ordonez read an English abstract of the following paper ;

Mexican Railroads and the Mining Industry, by Luis Salazar.

The following paper was presented in oral summary by the author :

The Mining and Treatment of Low-Grade Copper Ores at Los Pilares, Nacosari, with Special Reference to the ITsc of Gas-Engines in Mining, by James Douglas, Now York City.

The following papers were read by title, for subsequent pub- lication, distribution and discussion:*

Note on Hydraulic Mining in Low-Grade Gravel, by William IL Radford, San Francisco, Cal. (P.)

The Sierra Mojada, Coahuila, Mexico, and its Ore-Deposita, by James W. Malcolmson, Chihuahua, Mexico. (P.)

The papers marked (?) ” in this list were presented in print.

Proceedings Of Mexican Meeting.

The Treatment of Clay-Slimes by the Cyanide Process and Agitation, by E. A. H. Tays and F. A. Schiertz, San Jos& de Gracia, Sinaloa, Mexico. (P.)

Remarks upon Surveying Instruments with Special Refer- ence to the paper of Mr. Dunbar D. Scott on the Evolution of Mine-Surveying Instruments, and its Discussions, by H. D. Hoskold, Buenos Aires, Argentine Republic.

The Tri- Axial Diagram with Rectangular Co-Ordinates, by H. E. Ashley, West Wareham, Mass.

IsTotes on the Pigholugan and Pigtao Gold-Regions, Island of Mandanao, Philippine Islands, by J. Clayton Nichols, Grand Junction, Colo. (P.)

Notes on a Section Across the Sierra Madre Occidental, of Chihuahua and Sinaloa, Mexico, by W. H. Weed, Washington, D. C.

The District of Hidalgo de Parral in 1820, by Norberte Do- mingues, Parral, Mex.

Notes on a Few Mines in the States of Chihuahua and Sina- loa, Mexico, by W. H. Weed, Washington, D. C.

Influence of Country-rock on Mineral Veins, by W. H. Weed, Washington, D. C.

The Alloys of Lead and Tellurium, by Plenry Fay and C. B. Gillson, Boston, Mass. (P.)

The Alloys of Antimony and Tellurium, by Henry Pay and H. E. Ashley, Boston, Mass. (P.)

A Crystalline Sulphide in Pig-Iron, by Andrew A. Blair, Philadelphia, Pa., and Porter W. Shimer, Easton, Pa. (P.)

The Operation of the ‘Hole-Contract’’ System in the Center Star and War Eagle Mines, Rossland, B. C., by Carl R. Davis, Rossland, B. C. (P.)

Notes on the Mines and Minerals of Guanajuato, Mexico, by William P. Blake, Tucson, Arizona.

An Electric-Resistance Magnesia Crucible-Furnace for Lab- oratory Use, by H. M. Howe, New York City. (P.)

The Klein Jig and the Klein Classifier, by Ferdinand H. Regel, St. Louis, Mo. (P.)

Recent Geological Phenomena in the “ Telluride Quadran- gle ” of the IT. S. Geological Survey in Colorado, with Special Reference to the Report of Messrs. Cross and Purington upon that Area, by H. C. Lay, Telluride, Colo. (P.)

CXXviii PROCEEDINGS OP MEXICAN MEETING.

The Detection and Estimation of Small Quantities of Gold and Silver, by Luther 'Wagoner, Cathay, Cal.

"Views of an Old Smelter in the State of Morelos, Mexico, by C. W. Pritchett, Jr., Denver, Colo. (P.)

Biographical JTotice of R. P. Rothwell, by R. W. Raymond, New "York City. (P.)

Diverse Origins and Diverse Times of Formation of the Lead-Zinc Deposits of the Mississippi Valley, by Charles R. Reyes, Des Moines, Iowa. (P.)

The Zinc- and Lead-Deposits of North Arkansas, by J. C. Branner, Stanford Dniversity, Cal. (P.)

The Pachnca Stamp-Battery and its Predecessors, by M. P. Boss, Mexico City, Mexico.

The Electrical Burner for Blast-Furnaces, b3P. L. Grammer, Pueblo, Colo. (P.)

Notes on an Improved Form of Mining and Civil Engineers Transit Theodolite, by H. D. Hoskold, Buenos Aires, Argen- tine Republic.

Study of Amalgamation Methods, Especially the Patio Pro- cess, with the Object of Avoiding the Loss of Mercury, bj’* Miguel Bustamente, Jr., Mexico City.

Manganese Deposits of the Province of Santiago do Cuba : Their Origin, Formation and Commercial Value, by Eduardo J. Chibas, Guantanamo, Cuba.

An Adobe Reverberatory Furnace, hj John Gross, Sombre- rete, Zacatecas, Mexico.

A Synopsis of the Mining Laws of Mexico, by Richard E. Chism, Mexico City, Mexico.

A Glossary of Spanish- American Mining and Metallurgical Terms, by A. S. Dwight, San Luis Potosi, Mexico.

Some Experiments with Bromo-Cy'anogeu on Southerti Gold- Ores, by S. H. Brockunier, Wheeling, West Va.

Studies in Mechanical Feeding of Silver-Lead BlasLFur- naees, by A. S. Dwight, San Luis Potosi, Mexico.

The Cyanide- Assay for Copper, by Harry Huntington Mil- ler, Somerville, N. J.

Gems and Precious Stones of Mexico, by Gooyic F. Kunz, New York City.

Biographical Notice of Joseph Le Conte, by iS. Ik Christy, Berkeley, Cal.

PKOOEEDINaS OF MEXICAN MBETINC.

The Value of Ores in Mexico, by IST. H. Emmons 2d, Parral, Chihuahua, Mexico.

The Treatment of Tailings by the Cyanide Process at Atha- basca Mine, near ITelson, British Columbia, by E. Nelson Fell, Nelson, B. C.

Notes on the Structure of Ore-Bearing Veins in Mexico, by Edward Halse, Medellin, Colombia, South America.

The Mineral Zone of Santa Maria del Rio, San Luis Potosi, by J. P. Manzano, San Luis Potosi, Mexico.

Geographic and Geologic Features of Mexico, by Robert T. Hill, Washington, D. C.

The Supposed Change from Combined to Graphic Carbon in Cast-Iron at 1000° C., by Edwin Bukofzer, Chattanooga, Term.

Preliminary Sanitary Examination of the Waters of Mexico, by Ellen H. Richards, Boston, Mass.

Litharge Process of Assaying Copper-Bearing Ores and Products and Method of Calculating Charges, by Walter G. Perkins, Grand Forks, B. C.

The Bar of Soto La Mariana; Its Present State and Works Necessary for its Improvement, by Alexandro Prieto.

Biographical Notice of James F. Lewis, by R. W. Raymond, New York City.

Drainage Works of the Valley of Mexico, by Luis Espinosa, Mexico City, Mexico.

The Steel Plant at Monterey, Mexico, by William White, Jr., Pittsburg, Pa.

Discussion of Howe on The Constitution of Cast-Iron, with Remarks on Current Opinions Concerning It,'’ by J. E. Stead, R. Moldenke, T. F. Witherbee and the author. (P.)

Discussion of Sargent on Study of the Effect of Heat- Treatment on Crucible Steel Containing One per cent, of Car- bon," by H. D. Hibbard.

Continued Discussion of Van Hise on “ Some Principles Controlling the Deposition of Ores," by 0. R. Van Hise. (P.)

Discussion of Lucas on The Great Oil Well near Beaumont, Texas," by B. T. Dumble.

Continued Discussion of Scott on The Evolution of Mine- Surveying Instruments," by D. D. Scott and E. A. H. Tays.

Peoceedings Op Mexican Meeting.

Discussion of Drake on tlie Coal-Fields of JTortheastern China/ by F. Lynwood Garrison.

Discussion of Hedburg on The Missouri and Arkansas Zinc-Mines at the Close of 1900/' by P. Lynwood Garrison, J. C. Branner, H. W. STichols.

Discussion of Hedburg on “ The Missouri and Arkansas Zinc-Mines at the Close of 1900/' by Eric Hedburg and *W. A. Fleming Jones.

Discussion of Vogt on ‘Problems in the Geology of Ore- Deposits/' by W, H. Weed.

Discussion of Davis on The Operation of the Flole-Coii- tract' System in the Center Star and War Eagle Mines, Ross- land, B. C.,” by F. H. Probert.

Discussion of Malcolmson on The Sierra Mojada, Coahuila, Mexico," by S. F. Emmons.

On behalf of the Council. President Olcott proposed for im- mediate election to membership Sr. Don Manuel M. Contreras, mathematician and engineer, formerly Mayor of the City of Mexico, now a Senator of the Republic, and long connected with the School of Mines. The unanimous election of the candidate was emphasized by a rising vote, and acknowledged by him in a felicitous speech.*

After the adoption of a resolution instructing the officers of the Institute to express to the Government, the scientific and professional institutions, and the individual citizens of Mexico, and to the Local Committees throughout the Republic, a cor- dial acknowledgment of the courtesies extended to the Insti- tute, the session was adjourned.

The fourth session was held at Pachuca, on Friday evening, Rov. 15. The following paper was read by the author :

According to the Eules, the election to menihership of candidates recom- mended by the Council may take place either at a meeting of the Institute or by postal ballot. The latter method has been almost exclusively followed in recent years, as saving time at the sessions of the Institute, and also furnishing better opportunity for deliberate action on the part of both Councils and members. In adopting this amendment, however, the Institute wisely left to the discretion of the Council a choice between the two methods, thus permitting, in exceptional cases, like the one here recorded, the immediate recognition of distinguished and un<iue8tionahle merit.

Proceedings Of Mexican Meeting.

Tlie Mining District of Pachuca, by Ezequiel Ordonez, Mexico City.

And the following paper was read, in the absence of the author, by Stephen Waters, of Pachuca:

The Patio Process, by Manuel Yalerio Ortego.

The fifth and concluding session was held Thursday after- noon, IsTovember 26, at Monterey, when the following papers were presented :

The Coal-Fields of Las Esperanzas, Coahuila, Mexico, by Edwin Ludlow, Baroteran, Coahuila, Mex.

The Iron Mountain of Durango and the Plant of the Mex- ican ITational Iron and Steel Company, by T. F. Witherbee, Durango, Mex.

Statistics of the Mining and Metallurgical Industry of the State of Nuevo Leon, Mexico, for the year 1900.

With the adjournment of this session, the formal proceedings of the Mexican meeting were ended.

Having been personally prevented by domestic bereavement from taking part in this meeting, the Secretary desires to ac- knowledge the inestimable service rendered by Mr. Theodore Dwight, Assistant Treasurer of the Institute, who, in addition to the onerous labor and responsibility of the organization and management of the Institute excursion-party, assumed, at a day’s notice, the duties of Acting Secretary for the sessions and proceedings of the meetings.

Excursions and Entertainments.

These collateral features of the meeting are described and illustrated on page cxxxix of this volume.

Members and Associates Elected.

In addition to Sr. Don Manuel M. Contreras, elected at the third session, above reported, the following persons have been elected members or associates by postal ballots of March, J une, August, October and December, 1901.

Proceedings Op Mexican Meeting.

Members.

George I. Adams, . Henry Adams,

Ponciano Aguilar, . Andres Aldasro,

George E. Alexander, John W. Anderson, Edward Andrews, .

ISTels Olofi Bagge, . Edward T. Bailey, . Joseph T. Bailey, .

W. J. Barnett,

Montagu T. Barney, George Davis Barron, William T. Batchelor, . Christopher S. Batterman, Addison H. Beale, . Theodore Becker, . Sanford D. Belden, . Anson G. Betts,

David E. Bigelow, . Wilhelm Borchers, .

G. S. Borden, .

Frank K. Borrow, . Martin P. Boss,

Josiah Bowden,

Joseph H. Bowling, Augustus W. Boyd, Thornton M. Boyd,

John C. Brennon, .

Alfred Brett,

Samuel D. Bridge, . Boswell E. Briggs, . iirthur C. Brinker, . Wallace Broad,

James Brophy,

Donald C. Brown, . Walter J. Browning, Ernest B. Buckley,

Lester B. Bud row, .

Edwin Bukofzer,

Walter E. Burlingame, . Jos<§ Calero,

Carlos F. Z. Caracristi, . Henry M. Carter, .

Adolfo Martinez Ceballos, Louis Chevrillon, .

Luis Floro Chibas, .

Peter Christianson, . George C, Clark,

W. B. Clarke, .

. Washington, D. C.

. Puerto Principe, Cuba.

. Guanajuato, Mexico.

. Mexico City, Mexico.

. Denver, Colo.

. Thacker, W. Va.

. Montreal, Canada.

. New York City.

. Carlisle, England.

. New York City.

. London, England.

. Auckland, New Zealand.

. Pueblo, Mexico.

. Gormanston, Tasmania.

. Butte, Mont.

. Vandergrift, Pa.

. Telluride, Colo.

. Pittsburg, Pa.

. Lansingburgh, N. Y.

. San Diego, Cal.

. Aachen, Germany.

. Huntington, Arkansas.

. Telluride, Colo.

. Mexico City, Mexico.

. Elkhorn, Mont.

. Ozone, Tenn.

. Spokane, Wash.

. Beaconsfield, Tasmania.

. Torres, Sonora, Mexico.

. London, England.

. Monterey, Mexico.

. Mexico City, Mexico,

. Ward, Colorado.

. London, England.

. Eagle, W. Va.

. San Luis Potoai, Mexico.

. Las Cruces, N. M.

. Bella, Mo.

. Santa Barbara, Chihuahua, htexico. . Chattanooga, Tenn.

. Denver, Colo.

. Las Cajas, Pachuca, Mexico.

. New York City.

. Monterey, Mexico.

. San Luis Potosi, Mexico.

. Mexico City, Mexico.

. Santiago de Cuba,

. Minneapolis, Minn.

. Bisbee, Arizona.

. Schenectady, N. Y.

PROCEEDINaS OF MEXICAN MEETING.

Newton Cleaveland,

J. Morgan Clement,

J. Harold Clouston, Hervic N. G. Cobbe, Louis Cohen, .

George L. Collord, . Owen J. Conley,

Henry M. A. Cooke, Lewis H. Cooke, William A. Cornelius, Kussell T. Cornell, .

J. P. Cosgro, .

Charles H. Cutting, Charles S. Davis, Charles W. Davis, . Frank S. Davis, Herman Davis,

Stewart A. Davis, . William Dempster, Ralph Dillon, .

Charles M. Donohoe, Theodore Douglas, .

G. D. Doveton, Maurice Downey, . Norman M. Dudgeon, Arthur R. Earnshaw, Benjamin P. Ekberg, Norris English,

Luis Espinosa,

Edward P. Fleming, William H. Fluker, Emil A. Franke, William H. Freeland, Stanton S. Freeman, Dwight Furness, Telesforo Garcia, Jr., Russell D. George, . Thomas W. Gibson, Clarence I. Glassbrook, Karl Fr. Goransson, James B. Gore,

B. B. Gottsberger, . Charles N. Gould, .

G. H. Grant, .

Ulysses S. Grant, . MacDowell Graves, John C. Gwillim, . Warren A. Haggott, George Hall, . Newman G. Hall, . Wendell P. Hammon, Herbert R. Hanley,

Oroville, Cal.

Madison, Wis.

Derby, Tasmania.

Coolgardie, Western Australia. Zacatecas, Mexico.

Sharpsville, Pa.

New York City.

Oorgaum, Mysore, India. London, England.

McKeesport, Pa.

New York City.

Rossland, British Columbia. Troy, Arizona.

Mexico City, Mexico. Allegheny, Pa.

Diamondville, Wyoming. Dayton, Nevada.

Yandergrift, Pa.

Pollokshields, Scotland.

New York City.

Redding, Cal.

Topia, Durango, Mexico. Ouray, Colo.

Troy, Mont.

London, England.

Steelton, Pa.

London, England.

Oakland, Cal.

Mexico City, Mexico.

Troy, Arizona.

Tatham, Ga.

Chicago, 111.

Isabella, Tenn.

Parryville, Pa.

Guanajuato, Mexico.

Mexico City, Mexico.

Iowa City, Iowa.

Toronto, Ontario, Canada. Aspen, Colo.

Sandviken, Sweden.

Lumpkin, Cal.

Copper Hill, Tenn.

Norman, Oklahoma.

Yictoria, British Columbia. Evanston, 111.

Mexico City, Mexico.

Nelson, British Columbia. Idaho Springs, Colo.

El Oro, Mexico.

Aspen, Colo.

Oroville, Cal.

Winthrop, Cal.

Proceedings Of Mexican Meeting.

John A. Hanley, Jr.,

. Aguas Calientes, Mexico.

Harry C. Harrington,

. Newark, N. J.

Alfred W. Harrison,

. Victor, Colo.

Roger H. Hatchett,

. Argentine, Kansas.

Alexander M. Hay,

. Rat Portage, Ontario, Canada.

Henry Hay, .

. Johannesburg, Transvaal, So. Africa.

John H. Heal,

. Alamo, British Columbia, Canada.

Arthur E. Healey, .

. Sunshine, Colo,

James Hebbard,

. Broken Hill, New South Wales-

Otto F. Heckelmann,

. Mexico City, Mexico.

James D. Helm,

. Santa Barbara, Chihuahua, Mexico.

Everard Heneage, .

. Johannesburg, So. Africa.

Marcus F. Hernandez, .

. Monterey, Mexico.

Lawrence C. Hodson,

. Ames, Iowa.

Barry Hogarty,

. New York City.

L. F. S. Holland, .

. Waverley, Nova Scotia.

John J. Hollister, .

. Gaviota, Cal.

Ozni P. Hood,

. Houghton, Mich.

Gerald von Hopkins,

. Salmo, British Columbia, Canada.

George W. Horner,

. Mullan, Idaho.

James H. Howard, .

. Ameca, Jalisco, Mexico.

Joshua Hunt, .

. Monterey, Mexico.

John D. Irving,

. Washington, D. C.

"Webster T. James, .

. Chattanooga, Tenn.

T. G. Janney, .

. Centreville, Idaho.

Thomas Jenkins,

. Medlin, N. C.

George N". Jeppson,

. Worcester, Mass.

Richard M. Jessup,

. New York City.

"William C. Jirdinston, .

. Auburn, N. Y.

Alexander T. Johnson, .

. Aguas Calientes, Mexico.

Evan R. Jones,

. Lns Esperanzas, Coahuila, Mexico.

Walter A. F. Jones,

. Mansfield, Mo.

William S. Jones, .

. Green sburg, Pa.

Arthur Judge,

. Gadzcma, Mashonaland, Rhodesia,

So. Africa.

BurtZ. Kassm,

. Gloversville, N. Y.

Robert L. Kayser, .

. Monterey, IMexico.

Peter J. Ream,

. Ravenstlioi'pe, Western Australia.

Nathaniel S. Keith,

. New York City.

George C. Klug,

. Boulder, V'cstem Australia.

Isaac N. Knapp,

. Chanute, Kansas.

William Knox,

. Melbourne, Australia.

William Koehler, .

. Cleveland, Ohio.

George J. Krebs,

. Somerset, Pa.

George A. Laird,

. Matehuala, Mexico.

Mark Lamb,

. Hedges, Cal.

Richard Lamb,

. Highhill, Va,

John Langton,

. New York City.

James C, E. Lawson,

. London, England.

William H. Lefiingwell, .

. Cripple Creek, Colo.

Oscar T. Lempriere,

. Melbourne, Australia*

Prof. Lengemann, .

. Aachen, Germany.

PKOCEEDINaS OE MEXICAN MEETING.

William A. Lindsay, James Lindsey,

Archibald Little,

Frank Longmaid, . Vernon F. S. Low, . Lionel Ludlow,

Ernest Du Bois Lukis, . Ferdinand McCann, Greorge L. McCarty, Jackson C. McChrystal, , William P. McComas, Lesley McCreath, .

E. H. McCullough, . Alexander K. McDaniel, John A. McDonald, William T. McDonald, John McGrath,

John M. McGregor,

J. A. McKee. .

William A. MacLeod,

S. G. McNulty,

B. W. Macfarlane, . William Magenau, . Frank A. Manley, . William S. Mann, . William 0. Manson,

J. H. Marriner,

Chester W. Maxson, John W. C. Maxwell, Albert E. May,

Jesse J. May, .

W. H. Mealy, .

Alcides Medraro, Herbert A. Megraw, Fritz Mella,

Edward P. Merrill, . Edwin H, Measiter, . James W. Meyers, . Loring K. Millen, , Harry E. Miller,

Eugene C. Mills,

Louis D. Mills,

John Moffatt, .

Fred. L. Morris,

Henry C. Morris, , Edwin Morrison,

Horace Moses, .

John W. Mould,

Thomas King Muir, Ernest W. Nardin, William F. Nawatny, Harvey B. Nichols, .

. Las Esperanzas, Coahuila, Mexico.

. . . Portland, Oregon.

. . London, England.

. Marysville, Mont.

. . Kilda, Queensland, Australia.

. Buluwayo, Eliodesia, So. Africa.

. . Puehla, Mexico.

. Mexico City, Mexico.

. Torres, Sonora, Mexico.

. Eureka, Utah.

. . Beverley, Cal.

. Harrisburg, Pa.

. Philadelphia, Pa.

. . Butte, Mont.

. . Cape Town, So. Africa.

. . Los Angeles, Cal.

. . Tlalpujahua, Mexico.

. Slocan, British Columbia, Canada.

. Monterey, Mexico.

. . Queensland, Australia.

. Thacker, W. Va.

. . Ymir, British Columbia, Canada.

. Fredericktown, Mo.

. . Eock Springs, Wyoming.

. . Miramar, Costa Rica, Central America.

. . Denver, Colo.

. . Kalgoorlie, Western Australia.

. . Lordsburg, New Mexico.

. San Francisco, Cal.

. . Caethe, Brazil, So. America.

. . Idaho Springs, Colo.

. . Monterey, Mexico.

. , Ouro Preio, Minas Geraes, Brazil.

. . Guanajuato, Mexico.

. Rapid City, So. Dakota.

. . Daiquiri, Santiago, Cuba.

. . San Luis Potosi, Mexico.

. . Florence, Colo.

, . New York City.

. San Francisco, Cal.

. . Virginia, Minn.

. Lead, So. Dakota.

. . Irvinebank, No. Queensland, Australia.

, . San Jacinto, Cal.

. Georgetown, Colo.

. . Philadelphia, Pa.

. Santa Rita, New Mexico.

. . Cockle Creek, New South Wales.

. . Portland, Oregon.

, . Seoul, Korea.

. . Bowie, Texas.

. Selby, Cal.

Pkoceedings Of Mexican Meeting.

Hadson H. Nicholson, .

. Lincoln, Nebraska.

George E. Nicolaus,

. London, England.

Frank L. Norris,

. Durango, Mexico.

Alexander Orr.

. Sydney, Australia.

Clement H. Fallen, .

. Fort Steele, British Columbia.

Ernest E. Palmer, ,

. Texada Island, British Columbia.

George A. Paterson,

. Oorgaum, Mysore, India.

H. Pauli,

. Frankfort-on-Main, Germany.

Harold V. Pearce, .

. Argo, Colo.

Juan Pedrazzini,

. Locarno, Switzerland.

Walter G. Perkins, .

. Grand Forks, British Columbia.

Oscar B. Perry,

. Oroville, Cal.

Kichard Peters, Jr.,

. Chester, Pa.

Jos. L. Phillips,

. Mexico City, Mexico.

Edwin H. Platt,

. Denver, Colo.

Eohert H. Postlethwaite,

. San Francisco, Cal.

Bobert W. Powell, .

. Thames, New Zealand.

Eohert W. Pringle, .

. Edinburgh, Scotland.

John L. Pultz,

. New York City.

Keith D. Quarrier, .

. Charleston, W. Va.

Edward Eandolph, .

. Newark, N. J.

Fred B. Eaven,

. Nuttallburg, W. Va.

S, S. Baymond,

, Bay Point, Cal.

Eichard W- Beading,

. Selby, Cal.

Daniel W. Eeckhart,

. El Paso, Texas.

Frederick L. Eeynolds, .

. Hermosillo, Sonora, Mexico.

Albert B. Eichmond,

. Socorro, New Mexico.

Chester C, Bobbins,

, Lawton, Oregon.

Percy A. Bobbins, .

. Kimberley, So. Africa.

Cyrus S. Boberts,

. Oakland, Cal.

Milnor Boberts,

. Seattle, Wash.

Alfred von der Bopp,

. Oakland, Cal.

Carlton B. Bose,

. Golden, Colo.

Lewis G. Bo wand, .

. Newark, N. J.

S. W. Bussell, .

. Dead wood, South Dakota.

William Bussell,

. Denver, Colo-

Thomas J. Byder, .

. Mexico City, Mexico.

Beno H. Sales,

. Butte, Mont.

Henry S. Sanderson,

. Idaho Springs, Colo.

James V. Scaife,

. Pittsburg, Pa.

F. A. M. Schiechel,

. Frankfort-on-Main, Germany.

Bobert Schorr,

. Kennett, Cal.

Albert J. Sharpe, .

. Las Esperanzas, Mexico.

Clarence M. Schwerin, .

. New York City.

Herbert P. Seale, .

. Queensland, Australia.

Harry L. Shrom,

, Concord, N. C.

William J. Sims,

. Mexico City, Mexico,

William L. Sims, .

. Catasauqua, Pa.

Arvid Sjogren,

. Avesta, Sweden.

John H. Slavens,

. Argentine, Kansas.

Charles E. Sloan, .

. Salt Lake City, tJtah.

Edward P. Smith, ,

. Tombstone, Arizona.

Proceedings Op Mexican Meeting.

ex XXV 11

rederick T>. Smith, Thorn Smith, .

( Tcorge R. Snovcr, .

( reorge Spence,

Arthur C. Spencer, .

(K Stadelmann,

K. B. Stanford,

J. V. K. Stehman, . Alfred PI Stephen, . Henry Stern, .

Philip C. A. Stewart, (histavus XL Stoiber, Henry N. Stokes, Contantiim de Tarnava, . Prank A. Taylor,

R M. Taylor, .

Laurence M. Terry, Jkirtlett L. Tliane, . (diester.V. Thomas, William PI Thorne, Sydney Thow, .

Hugh P. Tiemann, .

R. il.Toll, .

Heorge W. d'ower, , Arthur U, Townsend, Herbert 10. Tutth*, . Arthur J. Underwood,

W. PI Up ham,

(diaries V. Valentine, (diaries 10. van Barneveld, (diaries McK. Van Clevc, P'rank Xj. Van Urden,

F. 10. Van Blyko, .

John Allen Veatch, Maurice A. Viele, .

U. IL von PetersdorlT, Elton W. Walker, . PTank S. Warmoth, Stephen Waters,

Winfield S. Watson,

W. II. Wesley, Jr., JOrnest H. Webb, (jhristopher M. Weld, Charles IT. White, . ' .

Norman P'. White, . Frank B. Williams, Alfred B. Willis,

Arthur B. Willmott, Alexander N. Winchell, . Jerry M. Wines, PTederick A. Wright, John C. Young,

. Ely, Nevada.

. Isabella, Tenn.

. San Juancito, Honduras, U. A.

. Alexico City, Mexico.

. Washington, D. C.

. Mexico City, Alexieo.

. Columbia, Cal.

. Birdsborn, Pa.

. Sydney, New South AVales.

. New York City.

. London, England.

. Silverton, Colo.

. AVashington, I). C.

. Monterey, Alexico.

, .Taekson, Cal.

Victor, Colo.

. New York ('ity.

. Siimdum, Alaska.

, Jerome, Arizona.

. Georgetown, Cal.

. Aloiint Read, Tasmania.

. New Aork City.

. Maiieos, (\)lo,

. Butte, Mont.

. Guaya(piil, Keiia lor, So. Ameriea . Monterey, Mexico.

. R,ohinson, Utah.

. Mateliuala, Alexico.

. No. Queensland, Australia.

. Aliimeapolis, Alinn.

. San Luis lAitosi, IMexieo.

. Houghton, Mich.

. Charleston, AV. Va.

. Maxwell Cal.

. Schenectady, N. Y.

. New York City.

. Detroit, Mich.

. Lawrence, La.

. Pachuca, Mexico.

. Mexico City, Mexico.

. (Queenstown, Tasmania.

. Brooklyn, N. Y.

. Storey Place, Mass.

. Cambridge, Mass.

. Queensland, Australia.

. Marysville, Mont.

. Kingston Hill, Surrey, PXngland.

. Sault Ste. Marie, Ontario, Canada. . Butte, Mont.

. El Paso, Texas.

. Monterey, Mexico.

. Baker City, Oregon. lA

cxxxviii PROOEEDIXaS OE MEXICAN MEETIXa.

Lewis E. Young,

Arnes, Iowa.

Moi’rison B. Yung, .

,

San Padro, Kew Mexico.

Adolfo Zambrano, .

Monterey, Mexico.

Associates.

Charles E. W. Bateson, .

Yew Ymrk City.

S. A. B. Blandv, .

F reiberg, Germany.

Fred. J. Boyd,

Sombrerete, Zacatecas, Mexic

Hemw C. Boynton, .

Cambridge, Mass.

George A. Camphuis,

London, England.

Lucien Eaton', .

Cambridge, Mass.

Augustus H. Eustis,

Ready i lie, Mass.

Frederick A. Eustis,

Ca mbri dge, M ass .

J. M. Fitzgerald, .

Catasauqua, Pa.

Thomas Gunn,

La ii ncest 0 n , Tas mania.

Edwin I. Harrington,

Yonkers, N. Y.

Moritz Hochscluld, .

Mexico City, Mexico.

James M. Hyde,

Palo Alto, Cal.

W. J. Johnson,

New York City.

J. Gibson Mcllvain,

East Dovvningtown, Pa.

Kalpli L. Montague,

Oroville, Cal.

Edwin Morrison,

Pliiladelphia, Ihi.

William M, Parkin,

New Kensington, Pa.

William B. Sea if e, .

Pittsburg, Pa.

Bernard E. Schnatterbeck,

New York City.

Lindsay Tullocli,

LaiuK estou , Tasmania.

Associates M

Ade M'Emijers.

H. 8 . Bonestall,

Jackson, Cal,

H. F. Kendall,

Virginia, Minn.

John E. Powell,

Telluidde, Colo.

Eugene C. Eoberts, .

Buffalo, N, Y.

John E. IL Robertson, .

Denver, Colo.

el. B. Stanton, .

New York City.

W. J. Sutherland, .

New York City.

W. Murdoch Wile; ,

Gold Hill, N. C,

Excursions and Entertainments Connected with the Mexican Meeting, November, 1901

The convenience and pleasure of members and guests attending this I meeting was served, while the expense of the journey was very greatly iednced,

. . til rough the organization of a special ex-

cursion-party by Mr. Theodore Dwight, whose executive ability in this direction, already exhibited on more than one similar occasion, was never more severely tested, or (if the Secretary may trust the unanimous verdict of the travelers concerned) more conspicuously proved, than in this peculiarly difficult case.

The party occupied two special trains, one of which started from New York City, via the Pennsylvania Eailroad, on No- vember 1st, at 2.20 P.M. The second train followed the first' out of Chicago at 10 p.m. on November 2d.

Tniin No. 1. — This train was composed of the Pullman sleepers “ Wildwood ’’ (4 drawing-rooms and 8 sections), “Horatio” (2 drawing-rooms and 7 compartment state-rooms), and “Petruchio” (2 drawing-rooms and 12 sections); the pri- vate car “ Olympia ” (chartered by President Olcott for his own use, one of the large state-rooms of which was, kindly placed at the disposal of Mr. Dwight, as an office); and the ob- servation-car “Pacific” (8 sections, bath-room, large parlor and recessed observation platform). To these were added two 60-ft. Pennsylvania Eailroad (Adams' Express) baggage-cars.

One of these, fitted up as a refrigerator- and storage-car after

A Supplement to tlie Official Proceedings of the Meeting.

Excursions And Entertainments.

designs l)yMr. Dwiglit, carried out of New York over 40,000 lbs. of commissary supplies, in addition to whicli, over 10,000 lbs. were stored iu the dining-' and the otlier baggage-cars. These supplies included about 5000 lbs. of fresh meats, 1000 lbs. of ham, 200 lbs. of bacon, 4500 cans of truits and vegetables, many barrels of tresh fruits and vegetables, 750 lbs. of fresh butter, 3100 qts. of White Eock’’ water, in addition to other supplies required for such a trip in a for- eign country, where American food-supplies are often difficult to obtain.

The second baggage-car was provided in one end with bunks to accommodate ten persons, partitioned off from that portion in whieli the trunks were stored. This was done to eliminate

a very serious olyection common to the usual tourists’ trips, where the cooks and crew are pcrmitte<l to sleep on tlie tallies and floors of the dining-cars.

The train carried about 85 passengers and a crew of about 22 persons, including, in addition to the regular force of waiters, porters, cooks, etc., a l)aggage-man, l)arbcr, store- keeper and maids.

The journey to Chicago was made vvithout incident. The trip had brought together many old friends, and in tlic 24 hours’ run all others becanie well acquainted. Owing to the very great weiglit of tlie train, the limited ” schedule (amid not be maintained, and tlie arrival at Cliicago was an hour behind time. The Engineers’ Club of that city Imd extended an invi-

tation to members and guests of whicli manj availed themselves, during their 7 hours’ stay, by dining at the Club.

While the party was absent IVoin Train No. 1, it was taken to the Atclii- son, Topeka and Sa-nta Ee station, and the baggage of those who were to be accommodated on the second train transferred to the baggage-cars of that train.

At 10 p.M. the first train left the station, followed shortly alteiuvard by

Route of the Excursion to the Mexican Meeting, Xovember, 1901.

Excubsions And Entertainments.

the second. The intention had been to keep the two sections within a few’ minutes of each other; but owing to a defective gas- valve in one of the cars of the second section, considerable delay occurred at Kansas City. The '' right of way was thus lost; and the two trains did not come together again until their arrival at Raton, K. M.

Train No. 2. — This was composed of the compartment-cars Bassanio” and ‘Philario;” the sleepers “Bernardo’ and Oloverdale ’’ (each having 2 drawing-rooms and 12 sections); the private ear Chiricahua ’’ of Dr. James Douglas (which joined the train at El Paso); the observation-car Aladdin;” and two baggage-cars, one belonging to the Mexican Central

Aqueduct from Chihuahua.

railroad, and the other courteously furnished l)y tlie Ghieago, Milwaukee and St. Paul Railroad Company.

As regarded the comfort and guidance of passcmgers, this train was under the charge of Mr. E. W. Parkei% of York City, who kindly volunteered bis valuable assistance in this respect.

General Equipment and Operation . — No more striking proof of the excellence of American railway equipment and tnanagcv ment could be desired than was given hy this continuous ex- cursion of nearly 8400 miles, made with trains of (xcc[)tioual length and weight, over road-beds of variable excelkni(;o (and, sometimes, very bad), including extreme grades and sharp

Excursions And Entertainments.

curves. It is not long since the sending of a single car on a journey of such length and character, without opportunity for shop-repairs, would have been deemed a hazardous experiment. And still more hazardous would have been the submission of seventeen cars to such a test. For it must be remembered that whereas, on a single line, under one control, and provided (as are our great transcontinental or trunk-lines) at frequent inter-

XiiG Night Picture of the lilaminated Cath<dnU at Chihuahua.

vals, with repair-shops, depots of train-supplies or duplicate parts, and even stations where substitute cars could bo obtained in an emergency, the result of a break-down in some detail of equipment might be only insignificant inconvenience or delay, such an accident, occurring on a new line, or in a foreign country, far from any available, immediate remedy, would be a much more serious matter. Apart from the difficulty or im- possibility of adequate temporary repairs, necessitating the

Excursions And Entertainments.

abandonment of a car and the accommodation of its inmates tliroiigli the over-erowding of the remaining cars, the simple delay occasioned by such an event, under such conditions, might entirely nullify the whole of the time-schedule, labori- ously constructed, and accepted by the difterent railroad com-

panies concerned, so as not to interfere with their regular busi- ness and their obligations as mail-carriers.

In other words, after all possible precautions and pixxirrange- ments, the success of such an excursion absolutely depcunUal, in the last analysis, upon the behavior of the railway eapiip-

Excursions And Entertainments.

ment funiislied; and the mere circumstance that this equip- ment could be reasonably calculated upon to endure the test of a month’s continuous and severe use speaks volumes either for the sanguine temperament of the organizers of such an un- dertaking or else for American railway construction and ad- ministration. The further circumstance that such an expecta- tion was actually justified by the event proves the latter, rather than the former.

There were two trifling break-downs in the plumbing of the tAvo trains, and there was a little trouble with the fittings of the private car “ Chiricahua ” ; but this was all. In the whole

Bull-Ring, Parral.

8545 miles traveled, not one car developed even so much as a box;” and at the end of the 30 days, with all their vicissitudes and varied exigencies, the double party was brought into Chicago on the day appointed, two hours ahead of its schedule-time !

This final triumph was due to the notable run of 923 miles from Hew Orleans to Chicago, over the lines of the Illinois Central system, upon which the rate already set by a fast” schedule was so far exceeded as to gain the two hours men- tioned. Over many parts of the line the speed of 70 miles per hour was made, without danger or discomfort to the party. Engineers will see at once tfiat this nerformance shows not

j

Excursions And Entertainments.

merely the excellence of engines and rolling-stock, but also the perfection of the road-bed.

This remarkable record, besides illustrating the perfection of American railway practice, dictates a hearty acknowledg- ment of the zealous co-operation of the officials and employees of the various railroads traversed, and especially of those of the Pullman Company. According to the strict rules estab- lished for the excursion, no individual fees were paid en route to porters, waiters, etc., but every member of the party gladly subscribed to a purse of about $1800, which was distributed among them at the end of the journey.

The perfection of the commissariat is indicated by the fact that more than 16,000 meals were served on the two trains to the 165 passengers and 45 members of the crews, etc., and to many Mexican local members or Committees received and en- tertained upon the trains for brief periods. And the Secretary has neither received any report, nor heard any rumor, of a single instance of dissatisfaction with the management of this depart- ment.

Distance Traveled , — The following memorandum shows the distance traveled by this party from Nov. 1 to Dec. 1, 1901 :

New York City to Philadelphia,

Miles.

Philadelphia to Chicago,

Chicago to El Paso,

El Paso to Chihuahua,

Chihuahua to Jiminez,

Jiminez to Parral and return,

. no

Parral to Santa Barbara and Minas Nuevas,

Jiminez to Zacatecas,

Zacatecas to Mexico City,

Mexico City to Drainage Canal and return.

Mexico City to Cuernavaca and return, .

Mexico City to Pachuca,

Pachiica to Tula,

, 44

Tula to Guadalajara,

Guadalajara to Guanajuato,

Guanajuato to Aguascalientes,

Aguascalientes to San Luis Potosi, .

San Luis Potosi to Smelter and return, .

San Luis Potosi to Cardenas,

Cardenas to Cafetal,

Cafetal to El Abra Falls,

El Abra Falls to Tampico (La Barra),

Tampico (La Barra) to Monterrey, .

Excursions And Entertainments.

Monterrey to Zaragosa and return, .

Monterrey to Baroteran, .

Baroteran to Coal Mines and return,

Baroteran to Eagle Pass, .

Eagle Pass to New Orleans,

New Orleans to Chicago, .

Chicago to Philadelphia, .

Philadelphia to New York City,

Total,

List of the Excursion Party, -

-The following list contains the

names of those who constituted the party :

W. P. Agnew,

H. B. Alexander, .

E. M. de Arozarena,

Mr. Franklin Bacbe, .

Mrs. Franklin Bache, .

Mr. Hugh A. Bain,

Mrs. Hugh. A, Bain,

Mrs. S. K. Barker,

Miss Barker, Mr, E H. Benjamin, .

Mrs. E. H. Benjamin, .

L. S. Bigelow,

Mr. 0. E. Billin, .

Mrs. C. E. Billin, .

Frank S. Bond,

Frank Borrow,

Miss Hally E. Bryan, .

Mr. F. J. Campbell,

Mrs. F. J. Campbell, .

El*. Thomas M. Chatard, Mrs. Thomas M. Chatard, . Maurice Clark,

Mr. William Bullock Clark, Mrs. William Bullock Clark, W. B. Cogswell, .

Mr. F. Collingwood,

Mrs. F. Collingwood, .

Mr. A. L. Collins, .

Mrs. A. L. Collins,

Mr. Edgar S. Cook,

Mrs. Edgar S. Cook,

Miss Eleanor Coxe,

Mr. Samuel W. Croxton,

Mrs. Samuel W. Croxton, . Mr. William M. Cummings, Mr. J. H. Devereux,

Mrs. ,T. H. Devereux, .

Mr. W. B. Devereux, .

Mrs. W. B. Devereux, .

Mr. Samuel Dixon,

Mrs. Samuel Dixon,

New York.

Sandon, B. C.

Mexico City, Mexico. Alderson, I. T. Alderson, I. T.

New York, N.Y.

New York, N.Y. Scranton, Pa. Sci*anton, Pa.

San Francisco, Cal. San Francisco, Cal. New York, N. Y. Chicago, 111.

Chicago, 111.

New York, N, Y. Tellur id e, Colo. Washington, D. C. Denver, Colo.

Denver, Colo. Washington, D. C. Washington, D. C. Mexico City, Mexico. Baltimore, Md. Baltimore, Md. Syracuse, N. Y.

New York, N. Y.

New York, N. Y. Tellur id e, Colo. Telluride, Colo. Pottstown, Pa. Pottstown, Pa. Toledo, Ohio. Cleveland, Ohio. Cleveland, Ohio. Mexico City, Mexico. Aspen, Colo.

Aspen, Colo.

New York, N, Y. New York, N. Y. McDonald, W. Va. McDonald, W. Va.

Excursions And Entertainments.

Dr. James Douglas,

Miss Douglas,

Mrs. J. S. Douglas,

Master Douglas, .

Mr. Arthur S. Dwiglit, . Mrs. Arthur S. Dwight, Theodoie Dwight,

Clarence Ed sail, .

Prof. S. F. Emmons,

W. E. C. Eustis, . Frederick A. Eustis, Augustus H. Eustis, Thomas M. Eyiion,

James Eyuon,

Mr. B. F. Fackenthal, Jr., Mrs. B. F. Fackenthal, Jr., Dr. William J. Ford, . Fritz J. Frank,

Walter C. Gayhart,

C. W. Haines,

Miss Frances B. Hawley, M. Hoehschild,

Mr. L. Holbrook, .

Mrs. L, Holbrook,

Miss Holbrook,

H. L. Hollis,

Charles W. Howard, Jr., Mrs. Emma S. Howard, Miss Hyams, .

Mr. A. W. Jenks, .

Mrs. A. W. Jenks, .

Mr. W. J. Johnston,

Mrs. W. J. Johnston, . Edward S. Jones, .

Mrs. Rufus C. Justis, .

Mr. William Kent,

Mrs. William Kent,

G. Kirch h off,

George E. Ladd, .

Carlos F. de Landero, . Pedro A, de Landero, .

A. Laughton,

Mr, John Lilly,

Ml'S. John Lilly, .

Edwin Ludlow,

Mr. Frederick W. Lyman, Mrs. Frederick W. Lyman, Miss Lyman, .

Mr. William R. Mcllvain, Mrs, William R. Mcllvain, Dr. Henry O. Marcy, , Charles W. Miller,

Harry H. Miller, .

Mrs. R. B. Morison,

E. M. Nolan, Interpreter, Mr, E. E. Oleott, .

Mrs. E. E. Oleott, .

. New York, N. Y.

. New York, N. Y.

. Moron ci, Arizona.

. Morenci, Arizona.

. New York, N, Y.

. New York, N. Y.

. New York, N. Y.

. Colorado Springs, Colo. . Washington, D. C.

. Boston, Mass.

. Boston, Mass.

. Boston, Mass.

. Philadelphia, Pa.

. Philadelphia, Pa.

. Easton, Pa.

. Easton, Pa.

. Washington, Conn.

. Chicago, 111.

. Austin, Nev.

. Philadelphia, la.

. New York, N. Y.

. Mexico City, Mexico.

. Mexico City, Mexico.

. Mexico City, Mexico.

. Mexico City, Mexico.

. Chicago, 111.

. Oakland, Cal.

. Oakland, Cal.

. Dorchester, Mass.

. Mapimi, Mexico.

. Mapimi, Mexico.

. New York, N. Y.

. New York, N. Y.

. Scranton, Pa.

. Fulton, 111.

. New York, N. Y.

. Now York, N. Y.

. New York, N. Y.

. Rollo, Mo.

. Pachuca, Mexico.

. Pachuca, Mexico.

, Mexico City, Mexico.

. LambertviUc, N, J.

. Lambertvillo, N. J,

. Barotci'an, Mexico.

. Minneapolis, Minn.

. Minneapolis, Minn.

. Minneapolis, Minn.

. Reading, Pa.

. Reading, Pa.

. Boston, Mass.

. Aspen, Colo.

, New York, N. Y,

. Baltimore, Md.

. Han Antonio, Texas.

. New York, N. Y.

. New York, N. Y.

Excursions And Entertainments.

Aliss Eupliemia Olcott, . Mrs. Neilson Olcofct, .

E. L. Oliver, .

Mr. E, W. Parker,

Mrs. E. W. Parker,

Mr. W. S. Pilling:,.

Mrs, W. S. Pilling,

Miss E. J. Platfc, .

Mr. F. E. Platt, .

Mrs. F. E. Platt, .

Mrs. Joseph C. Platt, .

Robert E. Plumb, . Theodore D. Rand,

Jacob M. Rich,

M. P. Rich, .

Mrs. George B. Richards, Master G. JB. Richards, Jr., Prof. R. H. Richards, .

Mrs. R. H. Richards, William H. Richmond,

Miss Emeline K. Richmond Miss Clara M. Richmond, Miss Laura Riegel,

Miss Ida Riegel, .

Prof. Heinrich Ries,

Mrs. Heinrich Ries,

Thomas M. Righter,

Miss Righter,

Miss E. M. Rivinus,

Mr. Charles Schaffer, .

Mrs. Charles Schaffer, .

Miss Sealy, .

Miss Ella Scaly, .

Vlr. H. J. Seaman,

VErs. H. J. Seaman,

V. W. Sheafer,

Jeorge Singer,

Miss Lina G. Slee,

Mr. J. William Smith, .

Mrs. J. William Smith,

J. W. Steiger, kimuol Storrow, .

Mr. John E. Sweet,

Jrs. John E. Sweet,

Mr. P, M. Taylor, .

Jrs. F. M. Taylor,

J. H. Taylor, Jr., .

Ir. Edwin Thomas,

Its. Edwin Thomas, .

Ir. Samuel Thomas, ,

Irs. Samuel Thomas, .

Ii*. M. D. Valentino, .

Irs. M. t). Valentine, . liss Anna T. Van Santvoorc I. A. Viel6, . liss Weightman,

Jharles H- Welles,

New York, N. Y. New York, N. Y. San Francisco, Cal, Washington, D. C, Washington, D. C. Philadelphia, Pa. Philadelphia, Pa. Scranton, Pa. Scranton, Pa. Scranton, Pa. Waterford, N. Y. Detroit, Mich. Philadelphia, Pa. New York, N. Y, New York, N, Y. Buffalo, N. Y. Buffalo, N. Y. Boston, Mass. Boston, Mass. Scranton, Pa. Scranton, Pa. Scranton, Pa Riegelsville, Pa. Riegelsville. Pa. Ithaca, N. Y.

Ithaca, N. Y.

Mount Carmel, Pa. Mount Carmel, Pa. Washington, D. C. Philadelphia, Pa. Philadelphia, Pa. Galveston, Texas. Galveston, Texas. Catasauqua, Pa. Catasauqua, Pa. Pottsville, Pa. Pittsburg, Pa. Poughkeepsie, N. Y. Syracuse, N. Y, Syracuse, N. Y. Washington, D. C. New York, N. Y. Syracuse, N. Y. Syracuse, N. Y. Denver, Colo. Denver, Colo. Philadelphia, Pa Catasauqua, Pa. Catasauqua, Pa. Catasauqua, Pa. Catasauqua, Pa. Woodbridge, N. J. Woodbridge, N. .T. New York, N. Y. Schenectady, N. Y„ Philadelphia, Pa. Scranton, Pa.

Excursions And Entertainments.

H. E. West, .

Mr. A. H. Wethey,

Mrs. A. H. Wethey,

L. H. Whitham, .

Mr. William H, Wiley, Mrs. William H. Wiley, Mr. David Williams, , Mrs. David Williams, . B. Williams, .

L. Williams, .

Mrs. L. Williams, .

Mr. Jones Wister,

Mrs. Jones Wister,

Miss Wister, .

Mr. Oscar Wolff, .

Mrs. Oscar Wolff, . Walter Wood,

H. H. Yard, .

Libby, Mont. Butte, Mont.

Butte, Mont.

New York, N. Y. New York, N. Y. New York, N. Y. New Yoi’k, N. Y. New York,N.Y. San Francisco, Cal. Milton, Cal. Milton, Cal. Philadelphia, Pa. Philadelphia, Pa. Philadelphia, Pa. Baltimore, Md. Baltimore, Md. Philadelphia, Pa. New York, N. Y.

It should be added that, besides the persons above named,, the sessions of the meeting and many of the local excursions were attended by many of the 130 members of the Institute resident in Mexico, and hy numerous other engineers and guests.

Chihuahua,

The party arrived at Chihuahua on Nov. 5th, at about 6 p.m.,. several hours behind schedule-time, by reason of the excessive weight of the two special trains, which arc said to have been the heaviest that ever entered Mexico.* Notwithstanding this serious interference with the plans of the Local Committee, its programme was carried out with energy, night being turned into day for this purpose. On arrival at the railway-station,, the party was immediately conveyed in carriages to the mag- nificent State Palace, whore it was received by ( {overnor Miguel Ahumada with an address of welcome in Spanish, to which President Olco-tt made an appropriate reply in the same lan- guage. The guests wmre then presented individually to the Governor. A large and excellent band, consisting of pupils- of the School of Arts under 16 years of age, furnished appro- priate music; and an elegant refection wms served in an adjoin- ing room.

A large part of the night, after 9 p.m., was devoted to a bril- liant ball, given in honor of the visitors, in the Theatro deS'

In justice to the Mexican Central Eailway Vo,j it should bo said that nearly all this loss of time was incurred between Kansas City and El Paso.

Excursions And Entertainments.

Heroes a handsome building erected by the State. The array of Mexican beauty and fashion presented on this occasion added

Chapultepec Palace.

supper, constituted a characteristic and impressive introduction to the hospitality of the Eepublic and its citizens.

Popocatepetl, from Sacremonte.

(Photograph by Henry M. Stanley.)'

rles gold and 10 to 14 oz. ot silver per ton, with 18 per cent of manganeBe, 2 of iron, and 16 to 20 of silica, the remainder being carbonate of lime.

Coaches were provided by the Local Committee for tlio use of the visitors on all occasions.

Wednesday, ISTovember 6th, was occupied with visits to points of interest in and about the city, conducted by Englisb- spealdng guides. Some of the party visited the Desouhndora manganese ’’-mine, a few miles distant, the ore of which car-

BXCUESrONS AND ENTERTAINMENTS.

EXCURSIONS AND ENTERTAINMENTS. cliii

Special trains were provided by Messrs. C. S. Sheldon and A. S. Dash, managers, respectively, of the Chihuahua and Pacific and the Chihuahua Mineral railway of Santa Eulalia, to run to Minaca and Santa Eulalia.

During the evening, the band of the School of Arts gave a promenade concert on the main plaza, which was elaborately decorated with flags and bunting, while the facade and spires of the Cathe- dral were brightly outlined and illuminated with innumerable twinkling lights. The smaller plaza in front of the Governor’s palace was also illu- minated, and the festive scene was full of picturesque and fascinating variety.

The adjectives ot praise, admiration and thanks will neces- sarily be employed again in this narrative ; but they will not have been in any later instance more thoroughly deserved than they were on this first notable occasion of the Institute trip in Mexico. The lavish and thorough preparations and the un- wearied courtesy of Governor Ahumada and the Local Com- mittee ; the cordial co-operation of the citizens and ladies of Chihuahua; the interesting features and typical spectacles pre- sented by the city, and tle great historic, present and future importance of this State as a mining field, combined to estab- lish Chihuahua in the memory of its guests beyond the danger of eclipse by any subsequent experience, however splendid.

From the pamphlet guide and programme fur- nished by the Local Committee, the following par- ticulars have been condensed as worthy of preser- vation :

Chihuahua, a city of 35,000 inhabitants, and the capital of the largest State of Mexico, was founded early in the seventeenth century by the Spaniards, who worked the rich mines of the sur- rounding hills. Some of these are still productive.

Those of the Santa Eulalia district, 15 miles east of the city, have been in operation for 300 years, and’ are estimated to have produced silver and lead to the value of nearly |2, 000, 000,000.

The present output is more than 300 tons of ore

Excursions And Entertainments.

daily, running from 30 per cent, of lead and 40 oz, of silver per ton to still higher values.

Chihuahua ranks first among the States of the Republic as a mining region. The present product of gold and silver bullion alone (not including ores shipped to smelters for treatment) exceeds $800,000 monthly, of which $250,000 is exported to the United States and England. The chief producers of silver bullion are the Batopilas Company ($180,000 per month) ; J. J. Water son, Ocampo ($50,000); El Concheno ($56,000); Pinos Altos ($42,000); Santa Eduviges ($38,000); Belen Co. ($25,000); and El Refugio Co. ($24,000). Among the few properties in

Study in Bronze.

this State which produce gold exclusively are La Glloria aud Oerro Colorado, near Batopilas (reported to produce, together, |44,000 per month) ; the Gruazapares mines (which have yielded in the past an enormous amount of ore, and have been pur- chased lately by a strong American company, with a view to extensive developments); and the Placer of Santo Domingo (likewise recently acquired by a foreign syndicate, which is now expending more than |500,000 gold in new machinery and plant). The largest known Mexican gold-nuggets have been found in the last-named district.

The principal mining camps of the State are Santa Eulalia, Parra], Jesus Maria, Batopilas, Guadalupe y Calvo, El Con-

Excursions And Entertainments

cheno, Pinos Altos, Santa Barbara, Cusihuiriachic, Magistral, Dolores, Gruazapares, Morelos, Drique, La Descabridora, and Corralitos. The largest copper-mines are at Magistral and Gnaynopita.

Cliapel of the Well, Guadalupe. (Photo, by H. H. Stanley.)

The construction ot the proposed Kansas City, Mexico and Orient railroad is expected to increase greatly the productive- ness of many districts.

For all these raining regions the city ot Chihuahua is the distributing center, and their progressive prosperity will in-

Excursions And Entertainments.-

crease its importance. Fortunately, under the able administra- tion of Governor Ahuniada (who is now serving his third term),

First Shrine in Mexico City.

the future ot the city has been worthily provided for by the introduction of modern municipal improvements, among which may be specially mentioned, as due to his wisdom and enei’gy.

Typical Pulqueria.

the public-school system, water-works, sewers, macadamized streets, and the State Theater.

Excursions And Entertainments.

.The city contains a number of important industrial establishments, including the large La Paz textile-mill ; a tine brewery; a. very extensive meat-packing and canning factory (with capacity to handle 300 head of cattle per day) ; and, most interesting of all to mem- bers of the Institute, the iron- and steel-works of La Compania Industrial Mexicana of which the following account is taken from the Iron Age of Nov. 21, 1901 :

‘‘La Compania Indnstrial Mexicana is under the manage- ment of Juan A. Creel, an exceedingly progressive and alert Mexican, a native of Chihuahua, who, with his brother, En- rique C. Creel, is identified with the different industries and with extensive mining enterprises. Mr. Creel, who was partly educated in the United States, began his career in a local bank, and has now, at the age of 85, reached the point where he can work out his patriotic desire of devoting his abundant energies to the uplifting, from an economic point of view, of his country- men and to the development of the extensive, though still largely dormant,, resources of the State, Mr. Creel took hold of the Compania Industrial Mexi- cana in 1893, when the plant consisted of a small foundry and machine shop. Under his management it has prospered and grown, and is still expanding rap- idly. A most interesting feature of much significance which has taken place simultaneously with this development is the education of native labor to the rank of skilled artisans. In 1893 the Mexicans were employed only as common laborers. To-day, when running full, the plant has 550 men on its pay-rolls, of whom all but about 50 are natives. They have taken their places as raolders, pattern-makers, machinists, rollers and melters, callings unknown to them until now. They are paid the same wages as those earned by the Amei'ican mechanics, the machinists receiving 153 to $5 per day, Mexican money, while the pattern- makers earn as high as |C, Mexican, per day, — wages which, in gold, are about on a par with those paid in the United States.

‘ ‘ The plant consists of a 15-ton Wellman tilting basic open-hearth furnace, equipped with a Wellman charging machine, the steel being cast into groups of small ingots on cars, bottom-casting having been adopted. The two bottom run- ners are of such dimensions that after the sprues are cut off a 4-inch billet is pro- duced, whicli can be rolled into shapes for which an absolutely perfect surface is not necessary. The pig-iron is purchased in the United States, but the works use largely old car-wheels, and, of course, depend upon the country for the

elviii

Excursions And Entertainments.

wrought scrap. Purchased muck -bars are the raw material for such iron bai*s as are rolled.

The rolling-mill, which is equipped with a modern heating-furnace, has a 12-incli and an 8-inch train, and produces bars down to J-inch rounds. It is driven by two engines, both of which were built in the works.

“ There is a large foundry and a good-sized machine-shop, crowded with Amer-

At Real del Monte.

lean tools, although a number of the tools were made in the shop. The com- pany make a specialty of mining machinery, stamp-mills, slag- and metal-pots, etc., and build Corliss engines up to 1000 horse-power. In the shops, in course of erection at the time of the visit of the engineers, was a 1000 horse-power hori- zontal Corliss compound engine for an electric plant. The foundry makes also miscellaneous castings, and quite recently the manufacture of stoves has been

Lodgings for Man and Beast.

(FhotOw tv Cox & Carmichael.)

taken up. There is a brass-foundry and a special department for the manufacture of valves, this being the only plant of its kind in Mexico. All the parts of the plant outside of the rolling-mill are driven by electric motors, the engine being a product of the shops. There is now in course of erection a new electric plant,

Excursions And Entertainments,

housed in a building the structural work of which was furnished by the American Bridge Company, It is large enough for an equipment of 10,000 horse-power. The present electric installation is supplying the town with light, but has reached its limit of capacity in that direc- tion. The fuel used for the boilers is wood and coal, the latter costing $12 per ton for Mexican and $18 for American coal. The plans are being drawn for a very large new machine-shop, the old one having outgrown its quarters.

‘Friends of Mr. Creel relate a recent experience which ilhistmtes both his enterprise and the difference between foreign and native management. At a short distance from Chihuahua is a copper- mining property which has passed through the hands of several Eng- lish companies, the last having spent about $1,000,000. As an indica- tion of the chararter of the work done, the fact may be cited that the slags made by the smelter ran 2 per cent, of copper.

The property, being .regarded as a complete failure, was hawked about in vain. Mr. Creel finally purchased mines and smelter for $25,000, Mexican money. He put in new machinery at the smelter and made improvements which cost in all $92,000,

Mexican currency. In 14 months the entire outlay had been recovered, and the company, known as the Rio Tinto Mexicana, is earning handsomely.”

Parral

Delegations from the Local Committee boarded the two sec- tions of the excursion-train en route early in the morning of Thursday, November 7th, and many miles away from their stopping-place. Eeaching Parral at 11 a.m., the party was met by the remainder of the Committee, with a brass band, at

Excursions And Entertainments.

the railway station. After an address of welcome irom the Mayor, Sr. Don Tito Arriola, they were divided into three parties, one of which, under the guidance of Mr. Edward Dii-

Chapel of Aranzazn, Griiadalajara.

fourc, the American superintendent of the Montezuma Lead Co., visited the Santa Barbara district (15 miles from Parral, on a branch of the Mexican Central railway); another was conveyed over the Parral and Durango narrow-

gauge railway to Minas IsTuevas; and the third

inspected the mills and other points of inter- est in and around the A town itself.

At 4 p.M. the three par ties were reunited and

conducted, through a vast peons in

picturesque costume, , to the a large

warehouse, which had been emptied, re-plas- tered, kalsomined and , decorated in their

an elegant bai for the several a of which suiidr tant localities been drawn Oysters came Corpus Christi from Tampico, c coast of the G Mexico ; and

Excursions And Entertainments.

Here, as in many other places in Mexico where the repre- sentatives of the Institute were entertained, the portraits of Hidalgo, Juarez and Diaz, who occupy in the history of that

Republic places of honor and esteem corresponding to those of Washington, Lincoln and McKinley in the United States, were prominent among the festal decorations. This fact was grace- fully utilized by Sr. Don Felipe Arellano, member of the

Excursions And Entertainments,

Isational Mexican Congress, who, as the appointed representa- tive of the municipal authorities and the Local Committee,

Making Adobe Bricks, Guanajuato.

otfered at the close of the banquet, and in the English lan- guage, the following address and toast :

Ladie,% Young Ladies, and Oentlemen : I am not going to make a speecli ; there is not time for that, and I am not master enough of the English language to say all that ought to be said on this occasion.

Appointed by the first political authority of this oity to offer you this ban-

Clxiv EXCURSIONS AND ENTERTAINMENTS.

quet, I will only say a few words to you, to express, if my lacking knowledge of tlie language of Shakespeare allows me to do it, the gratitude of tlie inhabitants of this raining district for your kindness in coming to visit our mountains.

San Francisco Churcli at Marfil.

'' Yes, the xniners and merchants of this city and its neighborhood feel them- selves very happy to. see you here ; and they tender to you their most warm thanks for vour visit. Everybody here has felt happy and honored to shake

Excursions And Entertainments.

hands with you this morning, and hopes that this visit of some of the most dis- tinguished engineers of the United States will be of great benefit to this mining district. Please accept, then, our thanks, and the assurance that your short stay here will be always remembered with pleasure.

“Please have the kindness to accept, too, this poor banquet as a token of our good will. We know that it is really poor ; but we hope that you will accept it so, taking into consideration our lack of proper means to receive and to entertain such distinguished guests as you are.

“ Please, too, accept the little silver spoons and the historical book of our town and mines, which an especial commission is going to put in your hands before we leave this table, as a testimony of our high esteem and gratitude to all of you.

“ And now, distinguished Ladies and enlightened Gentlemen, Good-by, Good-

The Patio Process,

by to you all ! May God bless your way wherever you go ; may fortune and hap- piness be always your lot in the struggles of life ; and when you return home, when you kiss again the flourishing and rosy cheeks of your little ones, turn back your looks towards Mexico, and then remember, and never forget, the new but true friends that you leave in Hidalgo del Parral ! But, then and now, forget and forgive the imperfect use that I have just made of your sweet and native lan- guage.

“Now, let us drink to the United States, the country of Washington, father of freedom in America, and of Lincoln and McKinley, the two great, courageous and glorious redeemers from slavery ; not only the United States, but also Cuba, Puerto Kico and the Pilipinas ; to Mexico, the country of Hidalgo, Juarez and Porfirio Diaz ; to the two sister Republics, the first on the American Continent and in a great part of the civilized world ; to General Porfirio Dfaz, President of

dxvi

Excursions And Entertainments.

Mexico, the great warrior and statesman, who in a short period of time has raised so high the name of the Mexican Kepnblic ; and to Colonel Theodore Koosevelt, the brave leader of the 'Rough Riders before the walls of Santiago de Cuba, and now the able President of the United States of America !

‘Senores: Digamos ahora todos, en el niagestuoso idioma de Cervantes : VA la

Fraternidad Universal!’’

A suitable response to this eloquent address was made by President Olcott ; and the re- mainder of the day, together with the early eyening, was spent in informal social entertainments, including a visit to the Casino, where a ball was in progress. At 9 p.m. the special trains left Parral.

The historical book ’’ mentioned in the address above

quoted was a beautifully illustrated souvenir, entitled Hidalgo

At Marfil.

del Parral, a Mining District Abounding in Mineral Wealth, Indian Legends and Interesting Superstitions, from which the following

EXCURSIONS AND ENTERTAINMENTS. clxvi]

account has been condensed, with the insertion of some addi- tional remarks from other sources :

The exact date of the first discovery of ore in Parral cannot be fixed. That it was before 1662 is proved by a report of that date by the Alcalde, Capt. A, Gruerra, which mentions 29 mines as working in what was evidently the mine now called the Jesus ilfaria, and 14 in the Negrita' evidently the present Tqjo. The town-record of mines and denouncements (loca- tions) for 1632 shows great activity in raining at that period. All the municipal records earlier than 1612 are lost; but it is known that the town was established considerably before that date.

Prior to 1634 the mines were worked for gold only ; but in that year Gov. Don Gonzalo Gomes de Cervantez reported to the Marquis of Sinaloa that ores had been discovered carrying 12 oz. of silver per 100 lbs., and that some of these could be successfully amalgamated, while others must be smelted. The records of 1634 show 4 amalgamating-works and 20 smelters in operation.

In the Parral assay-office, the record from 1641 to 1847 shows 569,741 marcos (or 4,557,741 oz.) of silver; and it may be inferred that after a few years of decline, between 1634 to 1641, there was a considerable revival of the industry. Prom 1649 to 1688, however, the reg:istry of only 813,472 marcos

Excursions And Entertainments.

(2,507,776 oz.) of silver indicates another decline. Such fluc- tuations are doubtless due to the fact that, with the crude early methods of mining and reduction, only very rich ores could be mined with profit, so that the condition of the industry de- pended from year to year upon the opposing factors of the ex- haustion of old bonanzas and the discovery of new ones, rather

Washing Tailings.

than upon the systematic and continuous working ol the same mines.

The old records from 1688 to 1718 were destroyed by tlio French during their intervention in Mexico, a century and a half later; and only a few facts can be now gleaned from the remaining documents.

It may be inferred from the records that from 1718 to 1820

Excursions And Entertainments.

the immediate vicin- ity of Parral main- tained a considerable output, mostly or wholly from shallow workings. The later records of this period frequently refer to Parral as containing ores of low grade but boundless quantity.

What was meant by low grade at that time seems to be in- dicated by the state- ment (in a petition for the establishment of suitable reduction- works) that the ores contained only 12 oz. of silver per earga of 300 lbs. — or, say, 80 oz. per ton !

It is hoped that a full account of the ore-deposits and mining industry of this district, prepared by a competent hand, will be published hereafter in the Transactions of the Institute. Mean- while, the following scanty notes are reproduced from the little book of the Local Committee.

Parral is located in the foot-hills of the Sierra Madre, the main range of which forms an imposing background to the series of successive elevations which ascend, step-like, from Jiminez, on the great Mexican plateau. Prom this place a branch of the Mexican Central railroad runs to, and about 60 miles beyond, Parral. With the comple- tion of this branch to Parral, about three years ago, the present revived activity in mining began. Previously, ores were hauled by wagon to Jiminez, and shipped thence to Socorro, hi*. M., El Paso, Texas, or Mapimi,. Mex., for treatment.

Guanajuato.

Excursions And Entertainments.

In the immediate vicinity of Parral the gen- eral rock is ‘‘ porphyry/' which contains strong and well-defined veins, carrying siliceous silver- ores low ill lead. Large bodies of low-grade ore, formerly not profitable, will now be mined by economical modern methods and machinery, and concentrated or reduced in the district. It is reported that the mills completed during the last two years, or now under construction, have a capacity of 1200 tons of ore daily.

Santa Barbara , — This place, 10 m. SW. of Parral, in the most important part of the general Parral dis- trict, is the oldest camp in northern Mexico. It was founded in 1547 by Spanish explorers, who are reported to have opened ten gold-mines, producing from 12 to 14 oz. of gold per carga of 800 lbs. 12 arrobas of 25 lbs.), supplying 700 arrastres,, and supporting a population of 7000. In 1580, Santa Barbara was the seat of the Spanish viceroy, who ruled over what is now the western and southwestern part of the United States, as well as the northern part of Mexico.

Early in the 17th century the prosperity of Santa Bar- bara seems to have been inter- rupted by a general “ stam- pede " of miners to the new district of San Diego de Mi- nas IsTuevas — now simply Mi- nas Uuevas — of which men- tion is made below. The official records have little to say of the older camp for some two hundred years. It is noted that early in the nineteenth century foreign capital was invested, espe- cially in the Mina del Agua, which was sunk 60 ft. below the water-level, and then abandoned. (In 1892 this

San LiiiB Potosi.

Excursion'S And Entertainments.

mine was reopened by a foreign company, which realized from it in a few months, and with small outlaj a net profit of more than |80,000.) There are also allusions to extensive gambo- cino gopher workings on all of the larger veins, which proved, as usual, profitable to the operators, but ruinous to the mines and the camp.

The general conntry-rock at Santa Barbara is slate and shale, traversed by N.-S. veins, dipping 45® to 75® E. Of these, the Tecolotes and the Mina del Agua can be traced for 3 or 4 miles over the mountains. Pockets of very rich gold-ore were found near the surface; but below the oxidized zone the grade was much lower, though the quantity of ore is large and regular.

Making Tortilla.

Minas Nuedas . — The origin of this camp was later than that of Santa Barbara, but doubtless considerably earlier than 1645, which is, however, the first date of a mining location now ac- cessible in the books at Parral. In 1657 there were fourteen competing ore-buyers in the camp — a proof of considerable production at that time. The first mine in the district is said to have been the Vela Grande located on the Veta Colorado which is the strongest vein in the district, and, perhaps, in Mexico. Its outcrop is plainly traceable for ten miles over the mountains, and averages, so far as it has been developed, 500 ft. in width. The deepest mine on this vein is the Veta Grade the incline of which has reached the depth of 1250 ft. (about

Excursions And Entertainments.

1000 ft. vertically), and shows at the bottom a vein from 15 to 18 ft. wide, assaying from 40 to 60 oz. gold per ton. Other old and new mines on the vein are the San Ftaneisco de la Merena (700 ft.) ; Nopal (700 ft.) ; Presena and Alf arena (900 ft.) ; Biseayna. (about 600 ft.) ; El Verde (about 1100 ft.) ; Los Muertes (680 ft.) ; Pachuquena (700 ft.) ; and the Quebradillas, the south end of which has been worked to the depth of 550 ft. ; while the north end, opened within the last 10 years, and now in bonanza, is 725 ft. deep. (The figures above given all signify inclined depth, unless otherwise specified).

The Brute and the Burden.

The ores from this vein are red with iron oxide — whence the name Veta Colorado.

Zacatecas.

On Friday, ISTovember 8th, at 4 p.m., the party reached Zaea- tecas. At this place no official reception had been arranged; but a stop of some three hours enabled the guests to see the quaint and interesting old city; and a. small number of them visited a neighboring mine. Zacatecas lies at an altitude of 8000 ft., has 45,000 inhabitants, and was founded in the mid- dle of the sixteenth century. The district is said to have pro- duced, from 1548 to 1810, gold and silver to the value of nearly $10,000,000.

Excursions And Entertainments.

The City of Mexico,

The capital was reached at 4 p.m. on Saturday, ITovember 9th. Among the numerous visits and social entertainments offered to the Institute dui*ing the meeting were the following : Monday November 11th, — Inspection of the Library, Hall of

Models, Meteorological Observatory (commanding a magnifi- cent panoramic view of the city), and Mineralogical and Gfeo- logical Cabinets of the School of Engineers; visits to the IsTational Library, the Cathedral, etc., and (in special electric cars) to the suburbs.

Monday Evening, — Eeception given by the Ayuntamiento ot the City in the Municipal Palace.

Tuesday,, November l%th, — Visit to the National Museum and the Academy of Fine Arts-. Reception by President Diaz in the beautiful castle of Chapultepec (built by the Viceroy of Ber- nardo de Galvez, and completed by the Emperor Maximilian). Visit to Guadalupe; inspection of the sampling- and testing-works of Heckelmann & McCann (the only establishment in Mexico where experimental working-tests for the concen- tration and metallurgical treatment of ores are made). In the evening, a reception and ball at the American Club, given by the Amei‘ican resi- dents of the City.

Wednesday, November 13A.— Special excursion via the Hidalgo and Northern railway to inspect the great drainage-works of the Valley of Mexico,

Excursions And Entertainments.

recently completed. From the City to San Cristobal , where the railroad crosses the canal, the party were the guests of Sr. Don Gabriel Mancera, the owner of the road. At San Cris- tobal they were taken in charge by Sr. Don Luis Espenosa chief engineer of the contracting company which bnilt the works. In the afternoon, a banquet, provided by the Local Committee, was served at Znmpango. The table was decorated with flowers, and a series of large glass vessels, containing the three famous red, white and green national varieties of pulque

Saddle Mountain, Monterrey.

punch, flavored respectively with the juice of the prickly pear,, almond and celery. The menu was composed of Mexican dishes.

Wednesday Evening . — Musical Reception and Tea, tendered by the railway, banking and mercantile circles, and the engi- neers of the City, at the restaurant in the gardens of Chapul- tepee.

Thursday November 14:th — Special excursion over the Mexi- can, Cuernavaca and Pacific railroad to Cuernavaca, in the State of Guerrero. This is one of the famous scenic lirus of the Republic. After crossing the valley of Mexico, the road ascends the mountain-side, traversing the lava-beds, to an alti-

Excujrsions And Entertainments.

tude of 10,400 ft. Then it drops rapidly 5000 ft. into the rich valley of the Morelos, with Cuernavaca in the center. The snow-capped peaks of Popo- catepetl and Ixtaccihuatl are almost continuously in sight. The town is in the tropical zone, and the last 75 miles of the trip brought the party from the temperate climate of the plateau to the tropical plain, with its sugar plantations and cof- fee trees. The chief attractions were the Borda gardens, commenced in the middle of the last century by a French miner, and still very luxuriant and attractive, though their fountains and terraces show the results of long neglect. The plaza, market-place, old Cortez palace, and other ancient buildings at Cuernavaca, are very interesting. The railroad has been completed through the Igualo canon to the Balsas river, which it will follow to the Pacific at Zihuataiiejo, thus opening to commerce the dormant mineral resources of the State of Guerrero and the agricultural section of the State of Morelos.

The excursion-party returned about 9 p.m. to the City of Mexico ; and at midnight the special trains departed for Pa- chuca, which was reached early on Friday morning.

During their stay iu' Mexico, the visitors were furnished with a guide-book to the city and emirons and an admirable descrip-

tive pamphlet, prepared by the Local Committee, and containing much material of historical, scientific and professional interest concerning the localities visited, and the conditions and prospects of the Republic.

The greater part of this ma- terial will be found in the two following papers, by mem- bers of the Institute, which will he separately published in the usual way, as personal contributions to the Transac- tione :

City and Valley of Mexico,’’ by Prof. Ezequiel

dxxvi

Excursions And Entertainments.

Ordoilez, Sub-Director of the National Geological Institute, Mexico, Mex.

“ A Sketch of Mexican Railroads,” by Victor M. Braschi, Mexico, Mex.

Pachuca.

Early in the morning of Friday, November 15th, the two trains arrived at Pachuca, the home of Sr. Don Carlos F. de Laudero, a Vice-President of the Institute, and the leading spirit in the reception of his fellow-members throughout the Republic. Pachuca is famous also in the history of Mexican mining, and especially as the birthplace of the process.

The travelers were awakened at 7.30 by the strains of a military band, and, upon leaving the ears, were cordially wel- comed by the Local Committee, headed by the Mayor, Sr. Don Rodolfo Munoz, and conveyed in carriages to the Palace, where, at 8.45 A.M., they were received by His Excellency, the Governor of the State of Hidalgo, who, by the way, spent his time almost exclusively for the next two days in cordial contributions to the entertainment of the guests. After an exchange of addresses, and the distribution of programmes, etc., containing useful in- formation, the party resumed their carriages (vehicles of various capacity, drawn by from 4 to 11 mules each, and collected from a large region, to meet the special demand for transportation) and were driven miles to the Santa Gertrudis mine, 2000 ft. above sea-level, where extensive preparations had been made for their reception. Those who desired to go underground were conducted into the mine-workings. There are five pwiTicipal shafts for hoisting and pumping, respectively 242, 245, 470, 420 and 202 meters deep. The absence of timbering and the protec- tion by arches of masonry of all drifts, etc., not in solid rock, is an interesting feature of this and other mines of the district. This mine has produced since 1878 about $25,000,000 (Mex.) in silver.

The roost remarkable sight above ground here is the now Gornish pumping-engine, built in 1898 by Buckle & Co., Lim- ited, of Plymouth, England, which was, at the time of this visit, ready to begin to run regularly, but had been run, in fact, but a few hours. The Engineering News of Nov. 28, 1901, gives the following description of it :

Excursions And Entertainments.

‘‘The steam cylinder is 90 in. in diameter and 10 ft. stroke, and its pump-plun- ger 9 ft. stroke and 18 in. diameter. The pump-rods are 500 meters, or 1600 ft., long. Its capacity is 1000 English gallons per minute, or, translated into Amer- ican terms, about 1,750,000 gallons in 24 hours.

“This enormous engine is said to have cost over $100,000 gold. It requires a large house to contain it ; and, besides, it requires a special steam capstan — a large drum driven through a worm-gear by a double upright engine — to erect it or to remove its parts for repairs. The engine has the old Watt parallel motion and the cataract valve-gear of the eighteenth century. An engine of this type has probably not been built in the United States, except possibly in California, for over 30 years, but it appears still to be built in England. The only reason for its being in this mine is that its former management was English. The present owners and managers are Mexicans, and they would not have bought such an engine. Matching the engine in out-of-dateness is a new battery of Cornish boilers ; but these we did not see, as they were covered over with a floor, to make the boiler- room into a banquet hall for our entertainment.”

A sumptuous banquet, served in the great boiler-house of the mine, which had been specially floored to accommodate 400 guests, was followed by numerous enthusiastic speeches in Spanish and English, of which the following, delivered by Captain Tomas Soloman, is preserved as containing much valu- able information :

“ To the Visiting Membm oj the Anierican Institute of Mining EnineerSy their Families ami Frimds :

“ Ladies and Oentlmnm: It is with, much pleasure that we welcome you to Banta llertrudis, and we heartily thank you for the honor you have conferred upon us in coming into our midst to-day. We hope that your visit to Pachuca will be both an agreeable and profitable one, and that your general tour will be success- ful in every respect, and that you will take away with yon many happy impres- sions and remembrances of this sunny land.

' I.

Excursions And Entertainments.

have been requested to give you a brief outline of the history of this ancient and justly renewed mining district, and principally of this property on which you are now standing, and which is one of the most important mining propositions of this country. I have also been asked to exj)ress my views of Mexico and her people.

"'The records we have of the oldest mines in this vicinity we owe, perhaps, to the researches of Humboldt. Another authority, however, Mr. W. P. Eoh- ertson, has made the statement that those of Eeal del Monte had been worked fully three hundred years before the advent of Don Pedro Jose Eomero de Terreros, an enterprising Spaniard, who was afterwards created Conde de Eegla. He came in 1749, and several years of prosperity were the fruits of his admin- istration. After his death, adversity came to his heirs, and the liabilities on the mines increasing, they found it convenient, in 1824, to enter into a contract with the English Taylor Co., with the result that the mines were leased to this pow- erful and widely known corporation for a period of twenty- one years. This com- pany, with ample capital at their back, entered with expensive enthusiasm into the work of development, and in the following year, 1825, three ships, each of 300 tons burden, arrived at Vera Cruz with machinery, which machinery, owing to the difficulties of communication in those trying days, did not reach its desti- nation until the following year, This English syndicate’s success was so indif- ferent that in 18-18 they entered into liquidation, with a loss said to have reached the sum of $5,000,000.

‘‘The local British colony, which has numbered as many as 600 souls, may be looked upon as the importation of the Taylor Co., and is still a force to-day in the encouragement of mining in the State of Hidalgo.

“ I may say, in passing, that I fear you will not find much to interest you here in the mechanical line, and you may fail to add to your scientific attain- ments through an inspection of our machinery plants, because they have all been imported. In any case, having come, as you all haye, from the greatest Republic, which is to play such an important part in the history of the future, you will not expect too much from us. We hope that the time is not far distant, however, when Mexico will cease to be under the necessity of bringing so much machinery from abroad. With such an influx of foreign money, we can anticipate the erection of extensive concerns to be devoted to the construction of all tliat we need. Mexico’s resources are practically inexhaustible, and there is an immense field here for the remunerative investment of capital.

“Turning to Santa Gertrudis, there arc indications of work having been done on this spot during the Spanish occupation, and the venture appears to have been abandoned at some period, owing to the excessive cost of deep mining. It is not known exactly, I believe, when the attention of the English was first attracted to this property, hut it seems to have been transferred from one to another during many years until 1875, October 25tli, on which date it was acquired 'by Messrs. William Stoneraan and Christopher Ludlow, the former a worthy pioneer and authority on mining, and the latter still a deserving resident of Pachuca.

“These gentlemen, having insufficient means to continue their explomtions and provide drainage facilities, decided eventually to form a small company among their friends, and many stories are told of ofiers of fortunes in stock made to and declined by them, their faith being at a very low ebb. In 1877 Sefior Jos4 de Landero y Cos was induced to subscribe for two bars (a bar being 'Vth), Captain Francis Rule and others also taking stock. Shortly after the for- mation of this company ore was discovered by accident whilst timbering, and tlie bars were soon quoted at |5000 each, after the total assessment per bar had only

Excursions And Entertainments.

amounted to |80. In 1878 dividends to the amount of $28,800 were paid. Iii 1879 a Cornish pump and steam hoist were installed on the new vertical shaft to the west, thus enabling the company to reach a depth of 240 meters. In 1890 a second Cornish pump was necessarily erected on another shaft to the east (the San Guillermo), for the purpose of lifting the water to the original pump. Up to 3883, if exception be made of the frequent and unfortunate changes of execu- tive and management, everything went well. In that year Captain Francis Buie accepted the management, and, subsequently, was elected to the Board of Direc- tors, with Senor Francisco Hernandez, Secretary of the State of Hidalgo, and Senor Francisco Bosete as associates j and they continued uninterruptedly in office until July of this year, when they resigned, and were succeeded by Messrs. Jose de Landero y Cos, Agustin Inurritegui and Manuel Algara, three gentlemen of vast experience and undoubted integrity.

'From 1878 to 1883 the Santa Gertrudis Co. paid in dividends the sum of $921,600, and from 1883 to 1886 only $158,400. Within this latter interval a cross-cut, at a depth of 200 meters, was driven south, and another lode was dis- covered ; and this, forming a junction to the east with the old lode, made Santa Gertrudis the great mine she is to-day.

“The net profits distributed from 1886 to 1901 reached a total of $2,487,020,

A Mexican Six-in-Hand.

not including dividends to free shareholders. The company’s records from their commencement show a

“ Total production valued at . . . . . $33,637,024.14

“ With a total expenditure of 24,570,893.36

“ Thus leaving a net profit to the stockholders of . $9,066,130.78

“ We have on this property 3 main shafts and 15 levels, the 16th being now opened up at a depth of 430 meters at the bottom of the San Francisco shaft.

“ It is intended that said San Francisco shaft shall, with its new machinery be the center of operations, the other engines being dispensed with. This instal- lation has been put in at an enormous cost. I could enlarge very considerably on this data relating to Santa Gertrudis, but I know that your time is limited.

“As regards Mexico, I feel that there is a grand future before her, and we shall all watch her evolution with deep interest. As to her people, perhaps I should entrust the task of extolling them to one more capable and' more Impartial. As I have only received kindness from tlieifl, my esteem is profound. But I will say that the Mexicans, as a whole, are intelligent, loyal, sympathetic, courteous and hospitable j and the foreigner who conducts himself as a gentleman among

Exctjksions Axd Entertainments.

them, doing his duty and nothing more, is treated by them as one of themselves, and with every desirable consideration. I deprecate all charges against individ- uals and authorities from men who have suffered in Mexico through behavior entirely hostile and reprehensible. If this country, ladies and gentlemen, has not already taken her proper place among the greater nations, it is because of the internal dissensions of the past, which had retarded her progress and civilization. But he sure that the blood of her heroes has not been spilled in vain, and that, under the banner of such as the great statesman who wields her destiny to-day, General Diaz, her pre-eminence is assured. In agriculture, mining, industrial enterprises, railway construction, education and general refinement, our Mexican brethren are making rapid strides. Were this not the case, ladies and gentlemen, the Pan-American Congress would not have assembled on Mexican soil, neither would I have had the most distinguished honor of my life, that of addressing such a learned and representative assembly as the one now before me.'

On the return to Paehnca, a visit was made to the Hacienda de Guadalupe, a silver-reduction works, employing the atio process. The crushers and Chilean mills, which prepare the ore for the patio amalgamation, are driven hj electric power.

The evening of Friday was occupied with a session, at which two papers were read, as reported in the official Froceeduigs. To these papers, and especially to that of Sr. Ordonez, reference may be had for further data concerning the mining of the Pachuca district. It may be added here, that, according to the list prepared by the Local Committee, the metallurgical works- of Pachuca comprise four haciendas namely, Loreto (100), Guadalupfe (80), La Luz (70), and La Purisima (40), employing the patio ; one, Del Progreso practicing the Boss system of pan- amalgamation ; and two, La Union (90), and Bartolome de Medina (50), in which a modification of the Kroenke method is used.

On Saturday, November 16th, a small party of guests re- mained in Pachuca to visit the haciendas above named, and the new Bronson concentrating-works, erected by an American on the stream which receives the tailings from all the Pachuca re- duction-works. The whole stream is pumped through this plant, and mercury, amalgam and heavy slimes are caught in riffles and upon canvas tables. Mr. Bronson expects to recover $300 per day in this manner from the final waste of the mills.

By far the larger portion of the guests spent this day in a, memorable excursion to the mining district of Real del Monte. The usual multitude of carriages and saddle-horses provided for those who wished to ride conveyed them, by a fine road.

The figures in parenthesis give the capacity in tons of ore daily.

EXCURSIONS AND ENTERTAINMENTS. clxxxi

some 12 miles to the mining camp. After viewing the mines (for an account of which see the paper of Sr. Ordonez already cited), the party proceeded to a magnificent oak grove, which crowns the mountain. Erom the crest of the divide a magnifi- cent prospect was obtained, including the snow-clad crater or

Popocatepetl. The following account of this episode is taken from the JEngineering and Mining Journal of Jlov. 30th — a special number, devoted to the Mexican meeting, and reflecting much credit upon the editors, publishers and correspondents of that periodical :

Excuesions And Enteetainments.

this country the lower hills are barren of all forest growth, but at eleva- tions of between 8000 and 9000 feet, one enters suddenly into areas heavily tim- bered with live oaks and other evergreens. At the border of one of these groves crowning a high divide, between two valleys, the citizens of Pachuca had con- structed a temporary dining pavilion, capable of seating about 700 guests. Large out-of-door kitchens had been built of brick, and here a score or more of cooks prepared the Mexican dishes, for which the mountain air and exercise of the morning had furnished the proper appetites. The writer will not attempt either to name or describe the viands. They were truly Mexican both in name and char- acter, but it was not necessary to know what they were in order to do them justice. They were washed down (lixiviated, so to speak) with tricolored pulque and other liquids. With the champagne came the usual speech-making, which was charac- terized by brevity and good feeling. Mr. Olcott’s address, delivered, as usual, in Spanish, was full of appreciation of the hospitality and courtesies which had been showered upon the Institute. Toasts were drunk to the Mexican flag and to President Diaz, and the luncheon closed with three rousing American cheers for the hosts of Pachuca and Keal del Monte. After the luncheon, dancing in the open air was indulged in for an hour or so, and at 5 o’clock the long cavalcade started down the mountain for Pachuca. The return trip was made in about one-fourth the time required for the ascent, and the city was reached in good time, for de- parture was set for 6 o’clock. It is not reflecting the least upon the entertainment at other points to say that the day at Peal del Monte was the most enjoyable one yet experienced. At each stop new surprises awaited the excursionists ; and if it were possible to kill with kindness and hospitality, Mexico would he guilty. From all sides the welcoming hand was extended, from the highest officials to the lowest peon. At every town the streets were lined Avith rows of the poorer classes, who looked with curiosity and smiling faces at the visitors, who were, in turn, just as curious, and just as pleased.”

' To tlie foregoing account the Secretary adds, by request, the following description, furnished by one of the enthusiastic diners, of one of the delicious Mexican dishes served at the banquet.

Lamb cooked as follows : The carcass, cut into large sections, is placed in sacks made of the fiber of the maguey plant. A large pit is dug in the ground ; the bottom is covered with glowing coals, and these are overlaid in successive order with a light covering of soil, then a sack containing the meat, another light layer of soil, another of coals, and finally a high bank of earth. This method cooks the meat to a delicious tenderness.”

An admirable institution at Pachuca is the Scientific Insti- tute, a good modern school for the education of mining engi- neers, surveyors and assayers, v’-hich occupies the thoroughly renovated and reconstructed building of an old Franciscan monastery.

Saturday evening, the indefatigable Oovernor and Local Committee sped the parting guests with a final farewell at the railway-station.

Excursions And Entertainments.

Tula.

A number of the guests, leaving Pachuea early Saturday afternoon, and subsequently rejoining the special trains, went ahead by train to Tula, from which station they enjoyed a de- lightful walk to the famous Aztec ruins in its vicinity.

Loving-Cup Presented by Members of the Party to Carlos F. de Landero. (Reverse side.)

Griiadalajara,

Sunday morning, IsTovember lYth, found the travelers among the great irrigated fields and prosperous haciendas of the fertile

Excursions And Entertainments.

semi-tropical Lerma valley and plain, the granary of Mexico. At the station of Castillo, a delegation from the Society of Eii gineers of Jalisco, headed by Vice-President Don Ignacio Gue vara, boarded the train for a preliminary greeting.

Guadalajara, the second city in Mexico as to size (populatior 107,000) and capital of the rich State of Jalisco, Avas reached at 11 o’clock. After an address of welcome, delivered at the railway-station by Sr. Don Jose S. Schiaffino, a venerable mem ber of the Society of Engineers, and a suitable response President Olcott, the visitors \vere left free from public en gagements for the rest of the day, which was, in fact, a wel come day of rest, after the fatiguing though delightful activi ties of the week. The magnificent cathedral, a few blocks from the station (with its famous Murillo Madonna), as well as the streets and market-place, were inspected with interest.

Monday morning, November 18th, the day’s programme be gan with a car-ride along the Hospicio Avenue to the Cit} Orphan Asylum, This remarkable institution covers a large block, and is divided into 23 patios, or courts, embellished with orange- and palm-trees, fountains, etc. It comprises schools of various kinds, including trade- and manual training schools, in which one of the interesting occupations is the making of the characteristic Mexican “ drawn ” lacework and embroidery. The institution is managed by the State, and has about 600 inmates, representing the poor of all ages.

After visits to the cathedral, government palace, and othei features of the city, a trip was made by mule- and steam-cars to the picturesque Barranca de Oblatos, about 7 miles from the city. This is a canon 1500 ft. deep, in the bottom of wliicl: are the municipal water-works. A Mexican breakfast, served in a casino on the brink of the precipice, was followed bj national dances by the rancheros, accompanied with music from a large band. Sr. Don Ambrosio Dlloa, Secretary of the So ciety of Engineers of Jalisco, made a graceful address, to which President Olcott responded.

The following account of this locality is taken from the Iroh Age of November 28, 1901 :

'Tlie Lerma river empties into Chapara lake to the southwest of Guadahg'ara, this lake, the largest in Mexico', being about 90 miles long by about 80 miles wide. Although there are no large towns, there live on its banks about 150,OOC people. From this lake arises the Santiago river, which, after a drop of many

Excuesions And Enteetainments.

feet at the Salto Jiianacatlan, the Mexican Niagara Falls, flows to the Pacific in w'hat is practically a canon, or ‘ barranca,’ for over 100 miles. The depth of the canon varies from 1000 to 1600 feet, and in some of its parts the walls are sheer on both shores. At the point visited the banks consist of a series of terraces of surpassing beauty. Looking down into the canon, there is visible the lower por- tion of a canal and the power-house of an electrical station, which furnishes power for lighting and for textile and other mills and factories in Guadalajara.

Loving-Cup Presented by Members of the Party to Rafael de Arozarena.

The canal was built by three parties, and through subsequent events the supply has been divided into three parts, the owner of only one of them having thus far developed it partially. There is a head of 65 meters, and there is available in all ,about 10,000 horse-power. It is proposed soon to convert the present horse-car lines of Guadalajara into electric lines, and there is also a project on foo< t citilizerthe power at the Salto Juanacatlan.”

elxxxvi

Excursions And Entertainments.

On the way home, a visit was made to the School of Arts, a fine building, not yet completed, containing a foundry, machine- shop, carpenter’s shop, etc., for the instruction of boys. This- institution is under the care of the clergy.

A visit was also made to the American Sanitarium, a branch of a similar institution at Battle Creek, Mich.

The festivities of the day were eoneluded with a grand even- ing concert, given on the plaza, by the celebrated bands of the 27th battalion and the State Guard, and a ceremonious fare- well at the railway-station. Loaded with large quantities of the interesting Guadalajara pottery, purchased during their visit, the party left the hospitable city at 11 p.m.

Guanajuato,

Early in the morning of Tuesday, ISTovember 19th, the trains- reached Marfil, the railroad-station three miles from Guanajuato,, where the Reception Committee, with the usual band, received the party, and escorted them to the town. The tri] was made in mule-cars, through the narrow gulch lined with old hadendaSy. mine-dumps, etc., and the still narrower streets, running be- tween one-story adobe and stone houses, to the commodious three-story building of the Guanajuato Club, which was the headquarters of the Institute during its tvo days’ stay in this quaint, curious and interesting, as well as in many ways im- portant, mining center. Here they were welcomed by many American and English, as well as Mexican, members.

The first professional visit was made to the reduction-works of the Guanajuato Cons. Mining and Milling Co., now under enlargement, which will increase the former 20 stamps to 60. The ore is pulverized, concentrated on Whilfley tables, and then amalgamated in pans. A walk of half a mile along the mine- railroad track led to the opening of the old mine, and another half-mile through an adit-tunnel, lighted by electricity, brought the party to the present underground workings, where the ore, broken about 80 ft. below the tunnel-level, was carried to that level in sacks on the backs of men, who ascended a very steep- stone stairway. The miners were naked except for a small loin-cloth. It is reported that there is now in sight |5, 000, 000' worth of ore, to say nothing of vast quantities yet to he un- covered,

Lunch was served at the handsome building of the State-

Excursions And Entertainments.

College. As one of the reporters remarks, “ from the nature of this entertainment, it appeared that the fame of the previous

Loving-Cup Presented by Members of the Party to Rafael de Arozarena. (Reverse side. )

ones had traveled ahead of the special trains, and the citizens of Guanajuato had determined to excel, if possible, the attempts

clxxxyiii

Excursioxs Akd Entertainments.

made at other towns/'’ But the same authority adds that it is not possible to make any comparisons V’ A pleasant novelty, however, and a grateful reminiscence of home, was presented on this occasion in the circumstance that the menu was com- posed almost entirely of American dishes. After lunch, the interesting niineralogical and geological collections of the col- lege were visited, and, still later, a trip was made by mule-cars to La Presa, where the narrow gulch is divided by dams into a series of lakes, surrounded by beautiful parks, the mountain- sides and narrow bottoms being occupied by the handsome houses and gardens of the wealthy residents of Griianajuato.

In the evening, the fine new Juarez theater and other State buildings were illuminated in honor of the visitors, and a ball, attended by the Governor and many of the Mexican citizens and ladies, was given at the Club, after which the party re- turned to spend the night upon the special trains at Marfil.

On Wednesday, November 20th, a memorable saddle-trip was made by the gentlemen of the party. Horses were fur- nished through the courtesy of the Governor, who ordered a troop of cavalry to report at the Cantador Park, dismount, and turn over their horses to the visitors. The ladies and others of the party meanwhile visited the old catacombs, the American hospital, and other points of interest.

The ectuestrian party visited the Esperanza reservoir (which has a stone dam 33 meters in height, and one of the finest in the world), and the Valenciana, Cata, Mellado and Rayas mines on the Veta Madre, (See descriptions below, and also the paper by Prof. W. P. Blake, separately published, entitled Notes on the Mines and Minerals of Guanajuato, Mexico.’')

Both companies of excursionists met at the State College for lunch, and subsequently visited the historical Granaditas build- ing and the Elores reduction-works, where 40 arrastres were in operation.

From the souvenir-programme distributed by the Local Com- mittee the following account is taken :

' ‘This district lias always Lad the reputation of being' second to none of the mining centers of this Kepuhlic for its producing capacity of the precious metals. The City of Guanajuato has a population of 41,243 inhabitants, the greater num- ber of which are exclusively dedicated to mining. It is situated in one of the gulches on the western slope of the Guanajuato Sierra. The first buildings date horn the year 1554.

Excursions And Entertainments.

“The surrounding mining territory covers an area of 784 sq. kilom. between two parallel lines 28 kilom. in length, which run NW. to SE., the course of the Mother lode. This lode is crossed in every direction by numerous mineralized ledges, the junction of which with the Mother lode increases its great width, thereby forming one of the largest and richest deposits in the Eepublic. Of this extensive mining ground but a small proportion has yet been explored.

“ The ledges that traverse this region may be considered as the constituents of three, or rather four, different systems.

“1. The Veta J/adre system forms the center of a group of which the remark- able lode that bears this name is the widest, and has been the most productive. It runs NW. and SE., dipping 45° SW- Several other veins run parallel to it,, while others are known to come in contact with it from a distance of over 1500 m. in different directions, forming thereby this extensive system.

“ 2, The La Luz system, considered as second to that of tlie Veta Madre, is sit- uated 4 kilom. SW. of the main system. It is formed by two different groups of veins that cross one another. One group runs NW.-SK, parallel to the Vta Madre; some of its veins dipping SE. and others NW., and converging towards the surface. The other group is formed of veins that slightly differ from the N.-S. direction, some dipping W. and others E. The crossings of the NW.~SE. with the N.-S. veins have coincided with the large bonanzas of this region.

“The first mine worked in the Guanajuato district was the San JBernabe, discov- ered in 1548 by pack-mule drivers traveling from Mexico City to Zacatecas. It is situated 13.5 kilom. NW. of this city, on the vein now called the La Luz, be- longing to the N.-S. group, and dipping W. As an abundant producer of rich gold-ore this vein has always been remarkable.

“ 3. The Monte de San Nicholas system, comprising several veins, lies 4.5 kilom. SE. of the Mother lode, and parallel to it in course and dip. The veins of this- system are noted for their abundant production of high-grade gold-ores.

“4. The /Sferm system includes the Santa Itosa, Fraguasnid Villalpando veins, which slightly converge to the K. , with a course similar to that of the Mother lode. Several dip SW., and others in a contrary direction ; both converging to- wards the surface.

“ The argentiferous minerals contained in the veins of this district are simple sulphides, sulpho-selenides, antimonial sulphurets and native silver. These occur plentifully in all the rich deposits found up to date. Chlorides and bromides oc- cur very seldom. There is more or less gold in all the ores, and it is notable that all the veins to the SE., in the rhyolitic porphyry, carry high-grade gold-ores, containing generally free gold, but in exceptional cases selenides and tellurides, or gold contained in the iron pyrites.

“The deepest workings in the district are the Valeneiana shaft on the Mother lode and the Asuncion shaft in the La Luz region. The former is sunk to a depth of 530 m., and the lowest workings of the mine are 1668 m. above sea-level. The latter is 419 m. deep, and at the lowest point attained 1870 m. above sea-level. In the Sierra region the depth of 2000 m. above sea-level has not yet been reached.

“For want of the necessary data., the production of gold and silver from the Guanajuato mines prior to 1701 cannot be stated with accuracy. Humboldt, in his Political Pssay, attributes to them a very heavy production. According to. coinage-statistics, the yield in the years mentioned below w’as as follows :

From 1701 to 1800, $279,690,689

“ 1800 “ 1829, 85,775,642

“ 1830 “ 1887, 277,608,876

$643,076,207

Excursioxs And Entertainments.

“ The imperfect system of redaction employed until 1866 warrants the opinion that these represent only about 60 per cent, of the contents of the ore mined.”

Eeturniiig at 4 p.m. to Marfil, the party left soon after.

Aijunscaiientes.

Earlv ill the morning of Thursday, November 21st, the special trains arrived at Aguascalientes. Here the excursion- ists were welcomed by the Local Committee and conveyed to the State Palace, where they were received by Governor Sa- greda, after which a visit was made to the smelting-plant of the American Smelting and Refining Co., the following notice of which is taken from the Engineering and Mining Journal of Hovemher 30th :

Mguascalientes is a central point to which the smelting-ores from Parral, Chihuahua, Ameca, Pachuca and other mining districts in the Kepublic are sent for reduction. The works at present are undergoing extensive alterations under the supervision of Mr. Cyrus W. Robinson, chief engineer for the com- pany. These alterations, which will cost about 1650,000 in gold, will be finished about next June. In the meantime, no interruption to the operations of the plant has been caused. From 1100 to 1200 tons of copper and silver-lead ores and concentrates are being smelted daily. The product, which, of course, varies in quantity according to the contents of the ores treated, consists of blister- copper and base bullion (silver-lead), which are shipped to Perth Amboy, N. J., for refining. When the alterations are completed, the capacity of the plant will not only be largely increased, but many economies of operation will be effected, and a great saving made in the condensing of the furnace gases, which at present carry off a considerable value. The plant will then he a strictly up-to-date estab- lishment, with electrical equipment throughout, and equal to anything of the kind in the United States. Even now it stands out in striking contrast to the mining methods employed in Mexico generally, where nearly all of the labor is performed by peons, and where mechanical installation is at a minimum.”

Lunch was served in the mess-hall of the company’s officials, and, returning to the city, many of the travelers availed them- selves of the famous warm baths, supplied by the springs to which the town owes its name. A grand band-concert in the afternoon in the San Marcas garden, and another in the even- ing in the Plaza de la Constitucion, completed the day’s expe- rience, and at midnight the special trains proceeded on their way.

San Luis Poiosi.

Friday morning, Hovemher 22d, the party was welcomed at San Luis Potosi by the Local Committee, with a military band.

excursiojS's and entertainments.

The remainder of the day is well described in the following paragraphs, from the Engineering News of December 5, 1901 :

‘‘The Local Committee escorted us to street-cars, which took us to the Gov- ernment Palace, where we shook hands with Senor Ingeniero Don Bias Escon- tria, Governor of the State of San Luis Potosi, and a distinguished engineer. He made us a speech in Spanish, which Mr. Olcott translated for our benefit, and then replied to it in Spanish. We were then taken hack to the station, and thence by train to the smelting-works of the Compania Metallurgica Mexicana. This is a splendid works, thoroughly modern, turning out silver-lead bullion and copper matte, which are shipped to the United States for refining. It is owned by Ameri- cans, and is in charge of an American engineer, Mr. k. S. Dwight, who acted as chairman of the Local Committee. Besides the sampling works, the smelting and roasting furnaces and the machinery, there is in the works a plant for making tannin extract out of the bark of the wood which is used for fuel. The bark is ground and then leached in large vats, and the weak solution thus obtained is concentrated by boiling in a vacuum pan. The extract is exported for use in tanneries.

‘The social features of our visit to the metallurgical works surpassed anything of the kind that we have yet experienced. Mr. Dwight has a commodious resi- dence close by the works, with a large porch on the second story, looking out on a magnificent view with high mountains in the far distance, and in front of the house was a large and beautiful garden, in which were set tables shaded with awnings and decorated with flowers. All of this was at our disposal for a resting- place during our visit, and at 1 o’clock an excellent lunch in the American style was served by an efficient corps of waiters.

“At 2.30 p.M. the train carried us back to the town, and the party broke up into groups to visit dififerent places of interest. Several of us visited the furni- ture-factory of Jorge Unna & Co., and the tobacco-factory of Senor D. Antonio Delgado Kenteria. The furniture-factory is a remarkable place. Mr. Unna is a German, who began the business with six workmen only twelve years ago, but the works now occupies a whole square and employs 200 people. Furniture of the highest quality only is made, and it is all hand-made and hand-carved. The works includes an iron foundry and machine shop, a cabinet shop, including saw- ing and planing machines, a glass-grinding, polishing and silvering shop, weav- ing machines for weaving braids, a designing and drafting room, and storehouses where are kept in the most perfect order the thousands of things that are neces- sary to the production of the great variety of artistic furniture turned out by the establishment The designs are made after a study of albums of engravings and photographs of the best European furniture, both old and new. There is nothing in the works to remind one of an American factory, where quantity and speed of production are the great essentials ; it is all essentially German and Mexican.

“The tobacco -factory makes cigars by hand, and cigarettes both by hand and by machinery. A few American cigarette-machines are in use, but the style of cigarette preferred by the Mexicans is made by hand, -and machinery has not been adapted for making it. In one room we saw over 400 girls, sitting in rows, each with a large wooden bowl containing the tobacco. The task of each was the roll- ing of 3200 cigarettes, which was accomplished in 7 or 8 hours, the wages paid being 60 or 70 cents, Mexican, per day. The clean and respectable appearance of these Mexican girls was most noticeable.

Ixcursioxs And Entertainments.

“In the evening there was a serenade by the bands of the 15th Infantry and of the Military Industrial School. It was held in the Plaza des Armas, a small park in front of the Palace. Seats were provided for our party, and the whole population of the city seemed to be present, walking around the park in two double rows, one of men, the other of women, or standing in crowds throughout the park and in the surrounding streets. It was especially noticed that the ma- jority of the people wore American dress in all its varieties, only a minority wearing the Mexican sombrero and zerape. Shoes were also worn by nearly all, bare feet and sandals both being much more rare than we have seen in other places.

“ At 10 o’clock a grand ball was given in the clubhouse of the Sociedad Poto- sina. The ball-room is one of the finest rooms we have seen in our travels. It is said to be a copy of the ball-room in the Winter Palace in St. Petersburg. The decorations and the general color-effect are exquisite. During the ball a supper was served in the French style, in 13 courses, with French wines. After the ball, the special street-cars returned us to the train ; and we left for Tampico at 2 A.M.”

Tampico.

Early in the morning of Saturday, November 28d, having passed through the San Ysidro valley in the night, the tourists found themselves at Cardenas, on the way to the port of Tam- pico. The following description is substantially taken from the Iron Age of December 5, 1901 :

‘ ' Soon after, the train entered the great canon of the Tarasopo, fringing its one wall in a series of curves and tunnels— a splendid piece of engineering. The steep slopes of the canon are heavily wooded, the bare cliffs rising on every side. At the mouth of the canon lie the tropical lowlands. A stop was made to view the charming upper pool of the El Abra falls ; and towards evening a visit was made to the fantastic Chov cave. The train reached La Bam, beyond Tampico, in time to permit a stroll along the beach of the Gulf in the moon- light. Extensive jetties have been extended into the sea at the bar, about 6 miles from Tampico, permitting the entrance of ships drawing from 18 to 21 ft. of water.

‘ Having thus descended in one day from the plateau of Mexico to the tropics, many of the party were up at sunrise on Sunday for a plunge into the breakers, in spite of warnings of the risk of encountering sharks. Later in the day the* journey was resumed.

“After the somewhat exciting descent of Saturday, a new experience awaited the party on the Monterrey and Mexican Gulf railway, which extends from Tampico to Monterrey, and beyond. This enterprise has had a checkered career, having been at one time in the control of Belgian capitalists. A few days before the Institute parly reached Tampico, the road was transferred to the interests, controlling the Mexican Central R. R. In running over a long-neglected road- bed, the heavy Pullman cars swayed ominously, and it was many hours after schedule-time that the trains steamed into the station of Monterrey, where two* military bands had long awaited their arrival.”

Excursions And Entertainments.

clxxxxiii

Monterrey.

This large town, the industrial center of northern Mexico, was reached on Monday, IsTovember 25th. The following de- scription of the excursions and entertainments of that day and the day following, like the passage preceding, is substan- tially copied from the article in the Iron Age of December 5,

‘ In the afternoon the party visited the Monterrey plant of the American Smelting and Eefining Company, known as Smelter No. 3, which confines its operations to the production of argentiferous base bullion, and the works of the Monterrey Smelting and Refining Company known as Smelter No. 2. The latter, which is controlled entirely by Mexican capital, is equipped not alone for lead smelting, but also for the desilverization of base bullion by a modification of the Parkes zinc process, and for the parting of dore bars by the Moebius process. To the majority of the engineers, however, the most interesting and almost startling development of Monterrey was the large steel plant which is now under construc- tion there. The Oici, Fundidora de Fierro y Acero de Monterrey S. A., is a concern organized by Mexican and French capital, the principal interest being held by the estate of Patricio Milmo. It has a capital of $15,000,000 (Mexican), of which about 35 per cent has been called in. The layout is exceedingly fine, the consulting engineer being William White, Jr., of Pittsburg.

“ In the evening the party attended a ball tendered by the Local Committee at the Juarez theater.

Tuesday morning, November 26th, a special train carried the party for a visit to the JDiente gorge, about 15 miles from the city. The mines are located high in the mountains, the tunnels opening at almost inaccessible points on the cliffs. The narrow valley which the railroad reaches is really only the shipping-station for two of the mines, the Dimte and the Zaragoza mines. In the case of both there are very interesting installations of wire-rope tramways. The owners of the Bierde mine, the Mexican Ore Company (an American enterprise), are build- ing an incline. This concern owns also the San Fedro and San Pahh mines in the district, and employs about 3000 men. The ore is lead-carbonate and galena, carrying about 20 per cent, of lead, but only 3 to 12 ounces of silver, per ton.

‘ ‘ At noon the party assembled at luncheon in the handsomely decorated pavil- ion of the Zaragoza mine. After a welcome from the Governor of the State of Nuevo Leon, the party gave three rousing cheers for Carlos de Landero, of Mex- ico, a representative of the Institute, who was chiefly instrumental in perfecting the arrangements for the Mexican meeting.’

A session was held in the evening, at which several papers were presented (see Proceedings); after which three military hands gave a concert in the Plaza Zaragosa, followed by a ball at the heautifnl Monterrey Casino.

Las Esjperanzas.

During the night, the trains proceeded to this place, which was reached iSTovepaber 28th, via Baroteran. The mines and

Excursions And Entertainments.

plant of the Mexican Coal and Coke Company, a description of which will he found in the paper of Mr. Edwin Ludlow, read at the Monterrey session, was here inspected.

Homeward Bound.

The journey hack to Chicago, via isTew Orleans, presented no features of special professional interest, except the brief stay of Train hTo. 2 at Beaumont, Texas, for a hasty glance at the famous new oil-field, and the extraordinary run from New Orleans to Chicago, already mentioned on a former page of this account.

The arrival of the excursion-trains at Chicago on Saturday, November 30th, practically concluded a successful and inter- esting journey, memorable in the annals of the Institute.

Acknowledgments and Presentations.

Under this head, the following particulars were deemed worthy of record :

1. In recognition of the cordial interest exhibited by G-en. Porfirio Diaz, President of the Eepublic of Mexico, in the meeting of the Institute, and the effective aid contributed by the various executive departments of the government under his direction, towards the professional profit, as well as the social enjoyment thereof, a complete set of the thirty volumes of the Transactions handsomely bound, was presented to him, by authority of the Council, in the name of the Institute, and acknowledged by him in a personal letter to President Olcott, dated Mexico, Jan. 11, 1902, of which the following is a trans- lation :

Mexico, Jan. 11, 1902.

‘Esteemed Sir :

‘Referring to your communication of the 30th of December last, I hasten to express my hearty thanks for the courteous gift of the valuable Transactions of the American Institute of Mining Engineers, in thirty volumes. I have placed these important books in the National Library of Engineers, as their most appropriate repository.

Your most obedient servant,

“Porfirio Diaz.”

2. Silver vases have been presented, in the name of the In- stitute excursion party, to Senors Carlos E. de Landero and Rafael M. de Arozarena, in recognition of their pre-eminent

Excuksions And Entertainments.

labors in the promotion of the Mexican meeting, and in the reception of the visiting members of the Institute. These vases, shown in the accompanying illustrations, were forwarded through the U, S, Department of State, and courteously allowed by the Mexican government to pass the international boundary free of all customs dues.

Pachitca, May 14, 1902.

“Db. Rossiteb W. Kaymond, Secretary, American Institute of Mining Engi- neers, New York City.

‘ My Dear Sir :

‘ ‘ I have the honor to acknowledge receipt of your esteemed communication of last April and of the magnificent silver loving-cup, forwarded by your office, through the United States Embassy in the City of Mexico, and presented to me in the name of the members and guests of the Institute who attended the recent Mexican meeting.

I beg you be so kind as to interpret my feelings, in your own high and dig- nified style, assuring all and every one of the friends who have honored me with, this symbol of their esteem, how highly I do appreciate their friendly token, and how heartily do I thank them. May this handsome gift, whereon your ablest artificers have so perfectly engraved the sacred emblems of our two countries, be for the givers and the receiver a symbol of hope that peace and friendship be abiding and everlasting between their and his country !

‘‘Trusting to have the honor and pleasure to meet you personally in the near future, possibly in the next coming meeting of our Institute, I remain,

“ My dear Sir,

‘ ‘ Yours very sincerely and respectfully,

“C. F. DE Landero,

“Vice-Pres. A. 1. M. E.”

“May 14, 1902.

“Mb. E. W. Eaykond, Secretary American Institute of Mining Engineers, New York City.

Dear Sir:

“ Your kind favor dated April received, as well as the beautiful loving-cup you had been instructed to send me by the members and guests of the party who attended our Mexican Meeting.

“ I know not with what words I can express to you my feelings at this moment ; to say I feel honored and delighted at this proof of friendship, that I will always cherish it for what it signifies, that all the good people who sent it have and ever will have a warm place in my heart, that I truly learned to love and esteem them while we were together, — to say all this and more, would still be saying nothing near to what I feel.

“ Dear Mr. Eaymond, will you finish your kind mission with a favor for me. Tell them, my friends, one and all, that all they feel, I feel and more ; that I was glad the day I met them and sad the day we parted.

“Sincerely yours,

“R. M. DE Arozabena.*

These gentlemen met the Institute party at the border of Mexico, and re- mained with it, as perpetual guides and counseEors, throughout its entire sojourn within the boundaries of the Eepnblic.

Exouesions And Entertainments.

3. During the evening of Nov. 29th5 on the run from New Orleans to Chicago, similar pleasant and almost simultaneous incidents occurred on each of the two trains.

Upon No. 1, the members of the party quietly gathered in the Observation end of the car Pacific,’ and sent a delegation to Mr. Dwight, who was in his state-room ; upon whose appear- ance, two handsome pieces of Creole silver were presented to him in a graceful and humorous speech by Prof. George E. Ladd, as an expression of appreciation of his efiorts in looking after the safety and comfort of the party.

Upon No. 2, at the dinner-hour, when all were gathered in the dining-car, Mr. W. E. C. Eustis made a presentation, on behalf of the passengers in this train, of two handsome pieces of Creole silver to Mr. Edward W. Parker, who, as previously remarked, had discharged the laborious work of caring for the safety and comfort of that party.

In both cases the recipients were completely taken by sur- prise, and could not attempt to reply, or even to express their appreciation, otherwise than by their obvious embarrassment and equally obvious pleasure.

4. About five hundred handsomely engraved official acknowl- edgments have been transmitted to the various officials, com- panies and citizens of Mexico, whose hearty co-operation so greatly contributed to the success of the meeting and of tlio excursions connected therewith.

Papers.

Vol. Xxxii. — 1

A Synopsis of the Mining Laws of Mexico.

By Richabd E. Chism, M.E., Ph.D.. Mexico City.

(Presented at the Mexican Meeting, November, 1901, and Copyrighted by the Institute.)

Contents.

Page

Introduction, 4

I. Mineral Substances, 7

II. The Exploitation of Mineral Substances, 8

III. Mining Property and Mining Claims, 9

IV. Prospecting for Minerals, 11

V. The Ministries of Fomento and Hacienda, 14

VI. Mining Agents, 15

VII. Mining Surveys and Mining Surveyors, 20

VIII. Acquirement of a Mining Concession, 24

IX. Amplification, Reduction and Remeasurement of Concessions : With- drawal of Applications, 31

X. Proceedings in Opposition : Mining Litigation : Penal Jurisdiction, . 35

XI. Metallurgical Works, 38

XII. Expropriations for Mining Purposes, 40

XIII. Easements and Tunnel-Eights, 41

XIV. Mining Contracts and Companies, 46

XV. Foreigners and Foreign Companies, 47

XVI. Registry of Mining Transactions, 48

XVII. Taxes on Mines, 51

Note. — T he following abbreviations are used in reference to the laws, etc., cited in this Synopsis :

C. Fom., Circular of the Ministry of Fomento (Mining).

C. Hda., Circular of the Treasury Department.

C. A DM. DEL Timbre, Circular of the General Administration of the Stamp Tax.

L. MIN , Mining Law of June 4, 1892.

L. IMP., Mining Tax Law of June 6, 1892.

R. L. MIN. , Regulations of the Mining Law, June 25, 1892.

R. L. IMP., Regulations of the Mining Tax Law, June 30, 1892.

L. MET. PREC., Law as to Taxes and Duties on Precious Metals of March 27,

R. L. MET. PREC., Regulations of said Law of March 27, 1897.

Tar., Tariff of said Law.

A Synopsis Op The Mining Laws Of Mexico.

Inthoduction.

In 1885 I presented at the Chattanooga meeting of the In- stitute a Digest of the Mining Code of Mexico in force at that time.* Since that time the law has been radically altered, and I have thought that it would be of interest to the Institute to have in its Transactions a synopsis of it as it now stands.

In order to reduce the volume of this synopsis, which is at best very extended, I am compelled to omit many details, for which I must refer the reader to my Encyclopedia of the Mining Law of Mexico ; but all the fundamental part of the law has been carefully retained.

The pursuit of mining in Mexico under the Spanish do- minion was governed by disconnected decrees and ordinances until the year 1584, when were formed what are called the Ordenanzas del Nuevo Ouaderno under the Grovernment of Philip n.

These laws governed until January 15, 1784, when the famous Ordinances of Mining,’’ which had been enacted by the King of Spain in May of 1783, came into force in Kew Spain.

After the accomplishment of the independence of Mexico, the Spanish Ordinances remained in force, with very few changes.

In 1857 a new Constitution was adopted in Mexico, which did not delegate the power of mining legislation to the G-eueral Q-overnment, and hence left the several States free to enact their own laws.

However, nearly all of the States continued to use the Spanish mining legislation. Only twm States, Durango and Hidalgo, adopted mining codes of their own.

The changes of governmental methods, and of mining and metallurgical systems, made the old legislation so difficult in its applications to the modern form of mining industry that it was resolved to adopt another organization, which should be general in its character and uniform for the whole Kepublic.

In 1883 a Constitutional amendment was adopted conferring upon the General Government of Mexico the power to legislate upon mining matters, and in November, 1884, a new Mining

, xiv., 34.

A Synopsis Op The Mining Laws Op Mexico.

Code, with accessory legislation, was adopted, and put in force from January 1, 1885. By this new Code the Spanish Ordi- nances of 1783, the succeeding colonial legislation, and subse- quent Federal and State laws upon mining, were utterly abol- ished, even those parts which were not contrary to the provi- sions of the new Code. (Code, Art. 218.)

This new code was the one of which I made the Digest which appears in our Transactions as quoted above. Its prin- ciples were, in many respects, a great improvement upon the vague legislation of the old Ordenanzas and were especially beneficial because they did away with the conflicting legislation of the several States.

However, when the monetary crisis arising from the fall of silver began to be severely felt in this Kepublic, the necessity of still more liberal mining laws became apparent, and resulted in the promulgation, June 6, 1892, of the present law, with its accompanying and subsidiary laws and regulations.

The old Spanish laws and the Mining Code of 1884 were based upon a working tenure of mining property, under con- ditions hard to fulfill and fruitful of litigation.

The law of 1892, based on principles entirely modern and liberal, gives the miner the property of his mines in an irrevo- cable, perpetual and secure form through the payment of a yearly tax, with full liberty as to methods of work and amount of work to be done. This law is one of the most illustrious monuments to the executive ability of General Diaz and his cabinet that could possibly be desired. Its results were immediate and con- spicuous. Immense mining and smelting establishments have sprung up, the cost of the production of silver has been greatly reduced, and the gold-product of the Republic has increased very largely. Foreign capital has been liberally invested, and is still flowing in an increasing stream into the Republic, which, in a few years, will undoubtedly be the largest producing mining country in the world. The wise and liberal law of 1892 saved Mexico from national bankruptcy, and started it upon a career of prosperity which is entirely without precedent, except, perhaps, in the development of the South African gold- fields.

The following table, taken from a government publication, is a convincing demonstration of the influence of wise legisla-

A Synopsis Of The Mining Laws Of Mexico.

tioii upon the progress and growth of the mining industry. It refers to the silver-product of Mexico only; but the figures for gold would show an even more flattering increase :

Quinquennial of Fiscal Years.

Silver.

Exportation of Ores, Bullion, Mexican Coin.

Annual

Average.

Annual Aver- age Increase.

Legislation of the States

From 1880-81 to 1884-85

1126,771,390

167,993,780

25,354,278

33,598,756

Unification of the Legislation in the Eepublic. Mining Code of

From 1885-86 to 1889-90

1 8,244,478

Law of 1892 — In force

From 1893-94 to 1897-98

267,417,591

53,483,518

19,884,762

The fundamental part of the Mining Law of Mexico is con- tained in a little pamphlet of one hundred and nine pages, which can be obtained at the Fomento Department free of charge.

The contents of this pamphlet comprise the Mining Law of June 4, 1892, with its Regulations, and the Mining Tax Law of June 6, 1892 (also with its Regulations), and a few Circulars and subsidiary Laws.

These Laws are, in effect, the fundamental portion of the Mexican Mining Code at present in force ; but the whole body of legislation wLich affects the rights of mii;ers, and especially foreign miners, in this country is very much greater.

We have :

The Mining Law of June 4, 1892.

The Regulations thereto.

Thirty-four Explanatory Circulars, with Rulings of the Fo- mento Department.

Law of October 31, 1892.

Decree of December 31, 1892.

Law of June 4, 1894.

Law of December 13, 1897.

Law of June 3, 1898.

The Mining Tax Law of June 6, 1892.

The Regulations thereto.

Thirty-nine Circulars, with Rulings of the Treasury and Revenue Stamp Department.

A Synopsis Op The Mining Laws Op Mexico.

. Law of Taxes and Duties upon Precious Metals of Mareli 27, 1897.

Regulations of said Law.

Tariff ‘ of said Law.

Besides which, many references are made to :

The Civil Code of the Federal District of Mexico.

The Code of Civil Proceedings of the same.

The Code of Commerce of the Mexican Republic.

The Foreign Law of 1856.

The Foreign Law of 1886, and

The Federal Constitution of Mexico.

In the present synopsis, the more important of the above laws have been carefully digested, and their provisions have been arranged in as orderly a manner as possible under the seven- teen different heads, or sections, into which I have divided the subject as shown in the table of contents prefixed to this paper.

L Mineral Substances.

The Mining Law of Mexico divides all mineral substances into two classes.

The first class contains such substances as may not be worked without a previous concession ; and the second class, such sub- stances as belong to the owner of the soil and may be worked without a concession.

1. The substances for the exploitation of which it is indis- pensable, in every case, to obtain a proper mining concession are the following :

A, Gold, platinum, silver, mercury, iron (except bog-ore, alluvial ore and ochres mined for coloring material), lead, cop- per, tin (except placer tin), zinc, antimony, nickel, cobalt, man- ganese, bismuth and arsenic, whether all these substances are found in the native state or mineralized.

JS. Precious stones, rock salt and sulphur. (L. min., Art. 3.)

2. The substances which the owner of the soil where they are found in place may exploit freely, and without the necessity of a special concession in any case, are the following :

A. Mineral oils and mineral waters ; the country-rock, which is to be used either for itself directly or as raw material for ornamentation and construction; the materials of the soil, as earth, sand and clays of all kinds.

A Synopsis Of The Mining Laws Of Mexico.

B. In general, all other substances not before excepted, (L. min., Art. 4.)

II. The Exploitation of Mineral Substances.

The exploitation of mineral substances, whether those that are subject to concession or those that belong to the owner of the soil where they may be found, is subject to all the regula- tions that may be established for police and security.* After said regulations have been complied with, the miners shall enjoy the most complete liberty of industrial action, — liberty to work in the manner which may suit them best, — with activity, more slowly, or suspending their labors for a greater or less time. They may employ in their workings any number of workmen they may choose and at the point which they may believe to be most appropriate, and they may follow the systems which they may find most convenient for their private interest for removal, extraction, drainage and ventilation.

JSrotwfithstanding, the mine-owners stand responsible for any accidents that may occur in the mines through bad working, and must pay the damages and losses that may be occasioned to other proprietors by lack of drainage or by any other cir- cumstance that may injure the interests of other parties. (L. min.. Art. 23.)

The exploitation of mine-products shall be strictly confined within the respective boundaries; and these boundaries can only be passed when the ground is free, and a previous con- cession of amplification has been obtained.

In order to enter any other person’s claims it is absolutely necessary to have the consent of the owner, except in the case of a legally established servitude. (L. min.. Art. 8.)

E'o exploitation of the substances which are subject to con- cessions shall be permitted in mines or placers, whether by open cut or subterranean workings, unless protected by a duly registered legal title. (R. L. min.. Art. 43.)

Whenever it becomes necessary to open any drainage-tunnel in a given locality, the .execution thereof shall be carried into effect according to a private contract between the interested parties. See Sect. XIII., of this Synopsis.

No such regulations have as yet been established (October, 1901).

A Synopsis Op The Mininh Laws Of Mexico.

III. Mininc Property and Mining Claims.

Mining property legally acquired is irrevocable and per- petual as long as the Federal tax upon property is paid. (L. min., Art. 5.)

. The primordial title-deed of all mining property acquired according to the laws now in force is that which is made out by the Ministry of Fomento by virtue of the powers conferred by said laws. (L. min., Art. 6.)

Mining property, except in ease of placers or superficial de- posits, is understood to include only the underground mineral right, and not the surface.

The owner of the mine must come to an agreement with the surface-owners for such part of the surface as he may need to acquire for mining purposes, as below.

The surface continues under the ownership of its proprietor, except in such part thereof as the miner needs to occupy in certain cases and conditions. (L. min.. Art. 7.)

The water which is raised to the surface by virtue of the subterranean workings of mines belongs to the owner of the latter. The provisions of the common laws must be observed as far as relates to the rights of the owners of the lands over which said waters take their course. (L. min., Art. 9.)

Whenever the owner of any mine shall transfer the same, he must give notice thereof, in writing, to the Principal Local Administration of the Revenue Stamp Tax, through the cor- responding subordinate office or agency. '

Said Principal Administration shall give account thereof to the Secretary of the Treasury, to be duly noted in the register. (L. imp., Art. 8, and R. L. imp.. Art. 27.)

The same notice must be given in the case that any person or company does not desire to continue in possession of any mine or mines which may have been acquired. (L. imp.. Art. 8, and R. L. imp.. Art. 27.) '

The default of payment of the Federal tax constitutes at present the only cause of the loss of mining property, without any recourse.

In this case the mining property remains free from all en- cumbrance, and may be conceded to the first applicant. (L. min., Art. 29, and L. imp., Art. 6.)

A Synopsis Of The Mining Laws Of Mexico.

Mining property is classed as real estate,'*' but mining stock is personal property.

The unit of a concession, wbieli is a mining claim [perte- neneia) is a solid of indefinite profundity. It is limited on the exterior by that part of the surface of the ground which serves as the projection of a horizontal square of one hundred meters on each side, and on the interior by the corresponding four ver- tical planes.

The perteiwida is indivisible in all contracts made as to mining concessions, and which affect the ownership of the same. (L. min., Art. 14.)

A fractional part of a claim cannot be the subject of a mining concession, unless it is found between other claims already con- ceded. (L. min., Art. 15.)

Those mines which may have been at work, or legally pro- tected from the necessity of being worked, at the time when the Mining Law of June 4, 1892, commenced to be in force, shall preserve their claims with such measurements as they may have, if the owners so desire it, even though said measure- ments should be different from the new measurements now established. (L, min., Art. 4, transitory.)

Mining concessions may include, whenever there is sufficient free ground, whatever number of claims may be applied for, without regard to the number of applicants — whether one only or several — whether they constitute a company or not ; and as many claims may be acquired as may be desired. (L. min., Art. 15, and C. Fom., July 1, 1892.)

The marking ofl' and measurement of the claims on the ground does not imply any right to the occupation of the lat- ter, and only serves to show the boundaries of the mining con- cession.

The applicant should thoroughly understand that he must agree with the owner of the land for the acquisition, whenever he may so wish, of such a part of the surface as he may need to occupy for the dependencies of his mining works, or of the whole of the surface marked off into claims (in the case of placers or superficial deposits).

If this acquisition cannot be made by mutual agreement By inference and precedent only j the law does not say so expressly.

A SYNOPSIS OP THE MININGr LAWS OP MEXICO.

with the owner, it may be effected by expropriation, through the appropriate judicial decision. (R, L. min., Art. 40. See JExjpropriation Sect. XII. of this Synopsis.)

Applications for mining concessions in which interrupted (separated) claims are asked for are admitted whenever said claims are all in the same municipality and on the same min- eral deposit; but in case the claims are in different munici- palities or on different mineral deposits, separate applications must be presented with reference to each claim or group of claims in each separate mineral deposit or municipality. (C. Fom., October 31, 1899.)

IV. Peospectinu por Minerals.

Any inhabitant of the Republic may undertake exploration work on public lands by giving notice thereof, in duplicate, to the local Mining Agent, in which notice the boundaries of the zone of exploration shall be accurately described.

The Agent shall return one duplicate notice to the explorer, after endorsing thereon the day and the hour of the presenta- tion thereof, and shall notify the explorer that in case of making excavations there they shall not exceed ten meters of extension, either in length or in width. (L. min., Art. 13, and R. L. min.. Art. 10.)

In those localities of the Republic which are not compre- hended mthin the district assigned to any Mining Agent, the notices and vouchers for prospecting permits shall be presented to the local postmaster, who, in this case only, may receive said documents, and shall note on them the day and hour of pre- sentation ; and, besides, he shall give immediate notice to the Ministry of Pomento by mail, and by telegraph, if there is one. (R. L. min.. Arts. 48 and 49.)

IJpon lands belonging to private owners, prospecting can only be done by the permission of the owner or of his representa- tive.'*' These persons, if they consent, must give to the pros- pector a proper voucher, with an indication of the boundaries of the lands where the prospecting is to be done. This voucher is to be presented to the Mining Agent, so that he may take

Prospecting on private lands can only be done by permission of the owner j but soliciting a mining concession (denouncing a mine) on such lands does not seem to need any permission.

A SYlOPSIS OF THE MININH LAWS OF MEXICO.

note thereof and return it to the prospector, after having noted thereon the day and hour of the presentation. (L. min., Art. 13, and E. L. min., Art. 11.)

If the necessary permission cannot be obtained from the owner or his representative, the prospector may apply for it to the local Mining Agent, oflering a bond for the damages and losses that may be caused.

The application shall be on view for the owner of the land for the term of fifteen days, and he shall be notified that unless he puts in an objection he will be held to be a consenting party thereto.

When the above term has expired the Mining Agent shall give the proper decision, and, if necessary in any case, shall fix the amount of the bond after a careful estimate of the damages which truly and positively may be caused to the owner of the land, so that the bond may not be excessive.

When the bond has been drawn up the Mining Agent shall give to the prospector a proper voucher, with a description of the boundaries of the zone of exploration. (L. min.. Art. 18; E. L. min., Art. 12; and C. Fom. of July 1, 1892.)

During the peremptory term of three months, counted from the date of the notice, of the permit, or of the administrative decision just referred to, the Mining Agent shall admit for the prospecting zone, and within the limits thereof, only such appli- cations for a concession as may be presented By the prospector himself. (L. min., Art. 13, and R. L. min., Art. 13.)

In those cases where the Mining Agent may receive an expert report, under the responsibility of its author, in which the existence of subterranean gold-placers is indicated, the term ot exploration may be lengthened up to one year. The rest of the proceedings shall be the same as for other prospecting permits, except that the shafts to be opened for prospecting may be as deep as may be necessary. (Law of November 13, 1899, Art. 1.)

The lengthening of the term of exploration for subterranean gold-placers is not to prevent the admission of applications for mining concessions, according to the laws in force, within the limits of the zone of exploration, to exploit deposits of any other minerals. (Law of November 13, 1899, Art. 2.)

The Mining Agent will be careful to publish, on his Bulletin

A Synopsis Op The Mining Laws Op Mexico.

Board, a copy of the prospecting permit, notice or administra- tive decision, and must indicate, at the end of the respective copy, the exact dates on which the exploration should com- mence and terminate. (Law of December 14, 1897, Art. 2.)

When the peremptory term above noted has expired, no new prospecting permits shall be admitted to registry for the land explored, nor shall any prospecting notice be admitted with respect to the same ground, until after the expiration of six months, during which time the ground in question shall re- main entirely free for applications for mining claims situated therein.

Within mining camps, where there are properties in posses- sion, prospecting shall only be done on ground which is at least 200 meters from the boundaries of the claims or in abandoned mines.

In every ease the prospector must clearly and precisely desig- nate the situation and boundaries of his ground. (Law of December 14, 1897, Art 1.)

Inside of private edifices and their dependencies, prospecting can only be done by permission of the owner.

Prospecting is not permitted near the nucleus of any town, or at a distance of less than fifty meters from the exterior lines of public and private residences and their dependencies. The same distance shall be observed with respect to any other public work or construction, but may be reduced to thirty meters from the exterior lines of common roads, railroads and canals.

As far as relates to fortified points, the minimum distance at which mining exploration can be carried on shall be one kilo- meter, starting from the exterior line of the works. (L. min., Art. 13, and E. L. min., Art. 14.)

According to the G-eneral Custom House Ordinances, Art. 452, such persons as may arrive from foreign parts to prospect for lands or mines, and who bring with them wagons, carriages, tools or instruments for prospecting, and who may solicit per- mission to enter the country therewith, may obtain the same from the Secretary of the Treasury, at his discretion. 'Such parties must give a bond, to the satisfaction of the local Custom House Administrator, to cover the amount of duties that may be determined at the time of arrival, and which must be paid

A Synopsis Op The Mining Laws Op Mexico.

if the re-exportation of the goods is not made within the time fixed hy the Treasury Department.

V. The Ministries op Fomento and Hacienda.

This first is generally called, in Spanish, Secreiaria de Fo- mentoJ' Fomento means encouragement in English, as nearly as it can be translated. Some later translators call it the Department of Public Promotion/’ but there is no justi- fication for using the word Public,” although the word Pro- motion ” is a passably fair translation of Fomento,

The Ministry of Hacienda corresponds to the Treasury De- partment in the United States. Hacienda,, in this connection, means everything relating to public revenue and expendi- ture ; in a more restricted way, it means the wealth of any in- dividual; specifically, a plantation or farm.

The mining industry in Mexico is by law dependent upon the Ministry of Fomento. Said Ministry, as a branch of the powers vested in the Executive of the Union, may decree such measures as it may judge proper for increasing the prosperity of the mining industry, and shall watch over the fulfillment of the laws relative thereto, by means of the engineer inspectors of mines. (L. min., Art. 30.)

The said Ministry must pronounce on every docket of a mining concession the final decision corresponding thereto, and must issue the primordial title-deeds of mining property.

The said Ministry should publish every six months, in the Diario Ojicial of the Federation, a list of the title-deeds which have been issued during said period. (L. min.. Art. 6, and R. L. min., Arts. 16 and 50.)

Every time that the Ministry of Fomento issues a title- deed, a detailed account of the concession to which said title refers must be sent to the Secretary of the Treasury. (R. L. min., Art. 37.)

The immediate control of mining affairs in the Ministry of Fomento is committed to Section Third, which is, in fact, a Central Mining Oftice.

The Secretary of the Treasury,, in its mining branch, has charge of the collection of the revenue stamp tax, of the an- nual mining tax, the coinage tax, the assay fees, etc., and of the exportation of the precious metals.

A STIfOPSIS OF THE MIXING LAWS OF MEXICO.

The Treasury Department may, w'henever it shall consider it equitable and convenient to do so, modify the rule by which the annual mining tax is to be paid in the local Principal or Subordinate Administration of the Revenue Stamp Tax.

Note. — Mining taxes are frequently allowed to be paid in Mexico City, or in some other central locality, when it is not convenient to pay them in the district where the mine is located.

In such a case the Treasury will give notice thereof to the General Administra- tion of the Eeveniie Stamp Tax, so that this office may communicate the same to the principal local stamp tax office where the mine is situated. (E. L. imp., Art. 20.)

The Treasury Department may grant a special concession to metallurgical companies to have their products assayed, and the taxes thereon liquidated, in their own establishments. (R. L. met. prec., Art. 1.)

The Treasury shall determine the compensation of public officers who sell stamps. (R. L. met. prec., Art 1.)

The Treasury shall designate certain government offices, banks or commercial houses on which drafts may be drawn to pay for bullion purchased by the Treasury for coinage pur- poses.

Also, the Treasury shall fix the term in which said drafts shall be payable. (R. L. met. prec., Art. 20.)

The Treasury may fix the minimum value per ton which is to serve as the basis for drawing up bonds for the exportation of precious metals and substances containing them. (R. L. met. prec., Art 35.)

The Treasury may make special regulations for the transpor- tation of metals and minerals within the zones of twenty kilo- meters along the coast and the frontiers.

The Treasury may modify or condone any administrative penalties. (R. L. met. prec., Art 34.)

VI. Mining Agents.

The primary authority of the Executive, represented by the Ministry of Eomento, is delegated to certain officials called Agentes de Mineria or Mining Agents.

The Mining Law prescribes that the Secretary of Eomento shall appoint in any mining districts where, in his judgment, it may be necessary, special Agents dependent on his Depart-

A Synopsis Op The Mining Laws Op Mexico.

ment. These Agents shall receive and put through the proper course all applications for mining property and surplus ground that may be presented to them, and shall exercise such other functions as may be designated for them in the law and regu- lations. (L. min., Art. 16, and E. L. min.. Art. 1.)

An Agent of the Ministry of Fomento must be a Mexican citizen in full possession of his rights, and he must not be exercising any office of authority in the State or Territory where he belongs, nor in the Federal District. (R. L. min.. Art. 3.)

For the legal impediments of the Mining Agent, see page 18 of this Synopsis.

At the time of appointing each Agent, the circumscription or the limits within which he is to exercise his office are to be designated, and the first boundaries, as well as any subsequent modifications of the same, shall be published in the Diario Oficial (official daily newspaper) of the Federation. (R. L. min.. Art. 7.)

For each Agent who may he appointed in any mining dis- trict, there shall also be appointed such substitutes as may be required according to the amount of business in the district in question. Said substitutes must have the same qualifica- tions as the Agents, and shall be the substitutes for the Agents in all temporary or permanent absences that may occur, as well as w'hen, through legal impediment, the Agent is unable to act in any particular case; and for any of these cases they shall be previously summoned by the proper Agent. (E. L. min.. Art. 4.)

The Agents, to exercise their office, should have a patent' (desjpacho), with a revenue stamp of ten dollars. When they forward this amount they must also remit three dollars and twenty cents for the signatures and formalities of the patent. (0. Fom. of August 29, 1892; but this has been abolished by a recent enactment.)

Whenever any Agent wishes to absent himself from his place of residence for less than eight days, he may do so if he previously notify his substitute to act.

The substitutes do not need a patent ; for the discharge of their office, simply the appointment conferred upon them shall be sufficient. (C. Fom., bTovemher 28, 1892.)

A Synopsis Op The Mining Laws Op Mexico,

If the time of absence is to be longer than eight daySj per- mission should be previously obtained from the Ministry of Fomento, and the cause of the absence and its duration should be noted, so that the Ministry may resolve upon the proper course. (C. Fom. of November 20, 1892.)

In case of death, or of serious illness which prevents the proprietary Agent from summoning his substitute, the latter may proceed to exercise the functions of the Agent ; but he shall immediately advise the Department of Fomento thereof by mail, and also by telegraph, if the latter exists. (R. L. min., Art. 6.)

The functions of the Agents are administrative only, and are perfectly defined by the existing regulations as to mining. (C. Fom. of July 1, 1892.)

In case of doubt about the application of the law or its regulations, the Agents must consult "with the Ministry of Fomento. (E. L. min., Art. 1.)

Agents have no right to accept more than the fee fixed by the proper Fee Bill, and they must consult the Ministry of Fomento with respect to the amount of their fees in any case not provided for in the Fee Bill. (E. L. min., Art. 8.) See Honorarios.

The books kept by the Agents do not need other authori- zation than that of the Ministry of Fomento. (C. Fom., Au- gust 1, 1892.)

The duties or obligations of the Mining Agents are :

1. To make known to the public the place in which they attend to mining business and the hours they devote daily to said business, which business must not be interrupted except on Sundays and national holidays. (E. L. min., Art. 7.)

2. To give course to applications for mining concessions in the manner to be described under the head of Acquirement of a Mining Concession, Sect. VIII. of this Synopsis.

3. To give course in the same way to the prospecting per- mits as is laid down under Prospecting, Sect. IV. of this Sy- nopsis.

4. To proceed in cases of withdrawal (desistimiento), am- plification {amplificacion), reduction (reduccion), or correction (rectijicacion) of claims, according to the rules laid down under Sect. IX. of this Synopsis.

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18 A Synopsis 01 The Mining Laws 01 Mexico.

5. To report to the Ministry of Fomeiito any information required of him.

Agents are expressly prohibited from reeeiYing and keeping on hand moneys intended for the payment of the annual min- ing tax. (C. Fom., April 12, 1892.)

The Agents are responsible for the errors or omissions in the dockets (expedientes), if said errors or omissions are im- putable to them. (L. miu., Art. 19, and R. L. min.. Art. 31.)

Impediments . — A Mining Agent shall be deemed necessa- rily disqualified to act ofiicially in the following cases :

1. In matters where he has an interest, direct or indirect.

2. In cases in which are interested any of his blood relatives in direct line, without limitation of degrees, his collateral rela- tives to and including the fourth degree, or his relatives by marriage to and including the second degree.

3. Whenever the Mining Agent or his relatives, as set forth above, have a lawsuit pending of a like nature to the one in question.

4. Whenever there exist between the Mining Agent and any of the parties in interest intimate relations proceeding from some civil or religious function, sanctioned and respected by custom.

6. Whenever the Mining Agent is an actual partner, tenant or employee of some one of the parties in interest.

6. Whenever the Mining Agent has been tutor or guar- dian of one of the interested parties, or is actually administra- tor of the property of such p'erson.

7. Whenever the Mining Agent is heir, legatee or benefi- ciary of one of the parties in interest.

8. Whenever the Mining Agent or his wife or his children may be debtors or bondsmen of any of the interested parties.

9. Whenever the Mining Agent has been lawyer, attorney, expert or witness in the matter in question.

10. Whenever the Mining Agent is related by blood or mar-

riage to the attorney of any of the interested parties in the degrees expressed in Paragraph 2. (E. L. Min., Art. 5, and

Code of Commerce, Art. 1132, Sects. L to IX., and XII.*)

These are the articles of the Code of Commerce relating to the impediments (disqualifications) of Judges of First Instance.

A Synopsis Op The Mining Laws Of Mexico.

For the authority of the substitute, in case of the death, etc., of the Mining Agent, see p. 17 of this Synopsis.

Honorarios [Fees], — The Mining Agents of the Ministry of Fomento are authorized to charge fees according to the regu- lar Fee Bill. (L. min., Art. 16.)

This Fee Bill is as follows :

1. For endorsing proprietors’ prospecting permits or notices and registry of the same, o-ne dollar (peso),

2. For the procedure and issuing of the prospecting permit issued by the Mining Agent when the proprietor refuses con- sent, two dollars.

3. For the registry of each application for a mining con- cession, or amplification and rectification of mining claims, and for the registry of the same, one dollar.

4. For the notices, summons and summary of dockets, at the rate of twenty cents for every ten lines or fraction thereof, and, besides, ten cents for the examination of each one of the leaves which are contained in the dockets and other documents to be included in the summary.

5. For the writing, comparison and countersigning of the certified copies, and for other copies, at the rate of one dollar for each 100 lines or fraction thereof.

6. For the search for dockets or for any other documents in the archives, one dollar.

When the parties in interest do not furnish sufficient data, and the search njust be made among documents corresponding to more than one year, one dollar for each year of the search.

7. For each kilometer of going and for each kilometer of return, when traveled for the performance of any official duty, twenty-five cents.

8. For ocular examinations or exterior inspections, and making a report thereof, five dollars.

9. For inspections, official visits or examinations, in work- ings underneath the surface, five dollars for every 190 meters of depth, or fraction thereof, to which said workings extend, and five dollars for the report thereon.

10. For presence at meetings which do not exceed one hour of duration, three dollars ; and for every hour or part of an hour over that time, one dollar. (R. L. min., Arancel.)

A Synopsis Of The Minino Laws Of Mexico.

By a Circular of Boniento of September 1, 1892, the Mining Agents are authorized to charge one dollar for the comparison and countersigning of the plans presented by the expert sur- veyor, and the same for the comparison and countersigning of the copies of plans which may be copied from the archives of the Mining Agency by the parties in interest.

The Mining Agents have a right to charge only the above- named fees, and should consult with the Ministry of Fomento as to what should be the amount of their fees corresponding to cases not provided for by the Ministry. (R. L. min., Art. 8.)

The default in the payment of fees, if attributable to either applicants or opposers, implies for the first that they have de- sisted from their application for a concession, and for the second that they are to be considered as having desisted from their opposition and as consenting to all the claims which have been brought forward by the applicant. (R. L. min.. Art. 36.)

VII. Mining Surveys and Mining Surveyors.

The measurement and laying out of mining concessions is to be done by graduate experts, or by practical experts if gradu- ate experts are not at hand.

The Mining Law requires that within the three days next following the presentation and registry of an application for a mining concession, the Mining Agent must appoint a gradu ated surveyor expert, or, if none such is to be found in th( place, a practical expert, who shall measure the claims anc gores applied for and draw up the corresponding plan, marking clearly thereon the monuments (landmarks) of the claims or gores aforesaid, as well as the contiguous claims within a zone of at least 100 meters all around.

The Mining Agent may appoint the expert indicated by the applicant whenever said expert has the necessary qualifications. (R. L. min.. Art. 19.)

The expert, within eight days after his appointment, must notify the Agent whether he accepts or declines the appoint- ment ; and, in the former case, that he has already made an agreement with the applicant respect to the payment of the fees. The Mining Agent shall make a corresponding note thereof on the docket.

By desire of the applicant, the above term of eight days may

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be prolonged by tbe Mining Agent, one single time only, for the same number of days more. (E. L. min,, Art. 20.)

At the time of making the note of the acceptance of the ex- pert, the Mining Agent shall fix for the expert a peremptory term of sixty days to present, in triplicate, the corresponding plan, accompanied by a detailed report; and he shall deliver to the expert a certified copy of his appointment, canceling there- upon a revenue stamp of ten cents for each leaf. The said copy shall conclude with the admonition that whoever may re- sist the performance of the field-work which the said surveyor has to carry on will be in danger of the penalties laid down in the law.

If the surveyors, in the performance of their work, actually meet with resistance, they shall demand the assistance of the public forces.

It has been expressly declared that surveyors, during the discharge of their duty, have the character of executors of a legitimate order of a public authority. (E. L. min., Art. 24, and C. Fom., July 6, 1892.)

The surveyor experts must pay attention to whatever ob- servations may be made to them by the applicant (for the con- cession they are measuring), arid by those who have opposed the application for the concession, or who propose to oppose it.

But they are not to express any opinion upon the observa- tions, except in the explanatory report which they must present to the Mining Agency.

The presentation of said report within the peremptory term fixed by law is a personal responsibility of the experts, who shall be charged with all the loss and damages that may be caused by any default in the presentation of said document. (E. L. min., Art. 25.)

The operations on the field to be performed by the duly ap- pointed surveyor expert shall be executed in such a manner that, by means of the necessary scientific processes, there shall be determined the horizontal lengths of the sides of the claims, and the angles formed by the aforesaid sides with the true meridian.

For this purpose the surveyor experts shall determine the magnetic declination of the compass, if that instrument is used to measure the courses of the sides.

A Synopsis Op The Mining Laws Op Mexico.

Effort shall be made to refer some one of the vertices of the perimeter to fixed points found on the ground, and all the necessary data shall be collected for the verification of the work.

Landmarks , — The marking of mining claims upon the sur- face of the ground shall be made by means of monuments or landmarks, which must fulfill the following requisites :

1. They must never be changed from their position, since they are intended to mark points that are essentially invariable as long as the claims or concessions which they define continue unchanged.

They are to be solidly constructed, and must always be preserved in good condition, such repairs being made as may be necessary.

2. They must be situated in such convenient number and place that, in every case, from any one of them the preceding and the following one can be seen. By their form, color, or in some other way, they must be distinguished from neighboring landmarks.

Bearing in mind the foregoing instructions, the mining sur- veyor appointed by the Mining Agency shall mark upon the ground the points where the landmarks are to be placed. The surveyor shall also mark these points on the corresponding plan which he may draw up. (R. L. min.. Arts. 3, 8 and 19.)

In case an increase of the number of claims in any mining concession shall be applied for, the landmarks must be placed upon the boundary-lines of the new property in accordance with the directions already given.

The same shall be done whenever there is a remeasurement (rectification) or a reduction of the number of claims. (0. Eom., September 3, 1892.)

Plans . — The plans of the claims shall be neatly and accu- rately drawn, on strong paper, for the preservation of the docu- ment, but the copies may be taken on tracing-cloth.

The scales must always be decimal and appropriate to the object of the plans.

The plans must show the length of the sides in meters, the directions of the same with reference to the true meridian, the declination of the compass used, with the date on which this was determined, and the area in hectares. (R. L. min., Art. 39.)

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The surveyor appointed to measure any concession must pre- sent his plans to the Mining Agency within the peremptory period of sixty days, under his own strictest responsibility.

The plan must be in triplicate, showing the claims or gores that have been applied for, as well as the neighboring claims within a distance up to 100 meters.

One of the three plans (on strong paper) is to be placed in the docket, and the other two are regarded as copies thereof. All three must be compared and countersigned by the Mining Agent before the first plan is remitted to the Ministry of Fomento with the docket (C. Fom., September 1, 1892.)

The plans and reports relative to mining concessions do not need revenue stamps. (C. Fom., October 19, 1892.)

In case the parties in interest should solicit copies of any plans existing in the archives of the Mining Agencies, the parties or persons designated by them for that purpose shall be permitted to make such copies on the premises of the Agency. (C. Fom., September 1, 1892.)

The responsibility which is incurred by the bad execution on the ground of the work of marking out and measuring the claims extends to the graduated surveyor expert, as well as to the simply practical experts. (0. Fom., July 1, 1892.)

The law does not exact the presence of the Mining Agent, nor that of any other authority, at the act of marking off and measurement of the claims. Hence, the applicants will not have to pay the costs which were formerly to be paid for said presence.

The want of said presence does not take away the neces- sary legality of the act, which is fundamentally a technical operation, and does not imply the occupation of property nor the infringement of any rights, the latter being guarded by the provisions of the law and its regulations. (C. Fom., July 1, 1892.)

The present mining law does not contain any fee bill for the payment of mining surveyors or experts, but there are in sev- eral States enactments covering these points; and for cases where they are not covered, the judges frequently use the scale of fees contained in the general fee bill of February 12,

A Synopsis Op The Mining Laws Op Mexico.

VTTT. Acquirement op a Mining Concession (Denounce- ments).

The words “ denounce ” and “ denouncement,” as applied to mining affairs in Mexico, came into the English language about 182‘r. H. Gr. Ward, in his book upon Mexico, published in 1827 or 1828, was the first or one of the first to use the term, and he defines it as follows : “ To ‘ denounce,’ in the Milling Code of Mexico, implies that process by which a legal right of possession is obtained to a particular portion of any vein, worked or unworked, known or unknown, which a miner chooses to select for his operations.”

The word is almost equivalent to “ announce ” in English, and has no opprobrious significance whatever.

According to the earlier mining legislation of Mexico, the applications for mining concessions w'ere called denuncios (de- nouncements) ; but the term is no longer in legal use under the present law, although it is still commonly employed in collo- quial language when mining matters are discussed.

With respect to denouncements, the Transitory Article 1 of the Mining Law of June 4, 1892, says : “ All denouncements of mines or of demasms (gores) which are in course of proced- ure when this law commences to take effect shall continue to be in procedure, and the necessary decisions thereon shall be made according to the present law.”

An y inhabitant of the Eepublic may apply for a mining con- cession. See Foreigners and Foreign Companies, Sect. XV. of this Synopsis.

The law concedes complete liberty with respect to the num- ber of claims* that may be applied for in any case where there is sufficient free ground, without taking into account whether the applicants are one or several, or whether they constitute a partnership or company, or not. (L. min., Art. 15, and 0. Fom., July 1, 1892.)

With exception of the case in which the claims applied for are situated in ground subject to exploration, mining conees-

This clause has been woefully abused in practice. There are many persona in the Republic who have made and are making immense denouncements solely for the purpose of keeping mining ground tied up j and up to the present time the eiforts of the Government to prevent this have had no decisive result.

A SYNOPSIS OF THE MINIKa LAWS OF MEXICO.

sions are always to be conceded to the first applicant. (L. min., Art. 15.)

See Mineral Substances, Sect. I. of this Synopsis, for a list of the substances for whose exploitation a concession is necessary.

Every application for a concession to mine any of the sub- stances which the owner of the soil is free to exploit shall be quashed at once. (E. L. min., Art. 44.)

Applications for the concession of mining claims or gores must be presented in duplicate to the proper Mining Agent, and must express with entire clearness the number of claims asked for ; their situation on the ground ; the location of the ground in the municipality to which it belongs ; the most not- able natural signs by which the claim can be identified ; and the designation of the mineral substance which it is proposed to mine. To secure sufficient clearness, the Mining Agent may question the applicant himself, entering all his answers upon the application, on the duplicate thereof, and in the registry- book of the Mining Agency, in presence of the interested party. But inability or refusal of the applicant to give expla- nations shall not be a sufficient ground for not making the registry, or for the suspension of the rest of the procedure. (E. L. min., Art. 15.*) Applications for mining concessions made in the name of a third party may be admitted, always provided that the applicant shall give a bond, and shall promise to produce a legal power of attorney in proper form, at latest within the sixty days allowed to the expert to present his plans and report. If said period passes without the production of the power of attorney, it will be to the prejudice of the inter- ested party. (C. Eom., October 15, 1892.)

Attorneys should be appointed by a power of attorney in legal form, if it is desired that the Ministry of Eomento shall deliver the titles to the attorney.f But, to avoid complications, the interested parties may, in their original application, or in a separate application to the Minister of Eomento, designate a person to whom the titles are to be delivered. (Special ruling of Minister of Eomento.)

See, however, on pp. 26 and 27 of ibis Synopsis, the analysis of Circular No. 32.

t A power of attorney in due form is required, fo-r the purpose of obtaining prompt action upon a mining title before the Fomento Department.

A SYNOPSIS OP THE MINING- LATfS OF MEXICO.

It is not indispensable that in every case the applicant for a mining property shall have an attorney or representative in the City of Mexico to receive the titles to a property. As soon as the papers are approved and the necessary stamps provided, the titles will be sent to each interested party, without any expense to Mm. (C, Fom., July 1, 1892.)

On October 31, 1899, a circular (Ko. 32) of the Ministry of Fomento was issued, which states that cases have been very frequent where applications for mining concessions have been presented with the deliberate object of preventing other per- sons from taking up the same ground ; and for the furtherance of this object a large number of pertenencias (claims) are asked for, or the number is not designated, as the documents simply claim the whole of a municipality, of a district, or of the juris- diction of a Mining Agent, etc.

The circular then proceeds to explain the provisions ot Ar- ticle 15 of the Mining Law Regulations, and enjoins that the applicants for mining concessions must carefully and exactly comply with Article 3 of the Mining Law of June 4, 1892, and Article 15 of the Regulations.

According to this circular, the applications must contain :

(1) the number of claims (pertenencias) to be included in the concession, clearly and precisely stated; (2) the situation of these claims on the ground; (3) the location of the ground in the municipality ; (4) the most notable natural marks by which the ground applied for can be identified ; (5) the designation of the mineral substance proposed to be mined ; (6) the nature and situation of the deposit in which the mineral is found, for which purpose it must be stated whether the mineral deposit is a vein, a blanket-deposit, a placer, or has some other form ; (7) mention of the place or places, within the boundaries of the local Mining Agency, where the mineral deposit may be examined — designating the most notable landmarks by which the mineral deposit may be identified.

In case the application does not duly satisfy all these requi- sites, it cannot be admitted or registered.

This circular gives the latest and strictest construction of the law.

If the above requisites are fulfilled, the Mining Agent, if still

A Synopsis Of The Mining Laws Of Mexico, 27

in doubt, may interrogate the applicant, and shall note his answers on ‘the application, on the duplicate, and in the Registry Book of the Mining Agency, in presence of the interested party ; but the proceedings must go on, if the above Teguisites are fulfilled even if the party cannot give explanations, or refuses to do so.

The Mining Agent shall call the attention of the Ministry of Fomento, when the docket* is sent on, to the rpiestions that were asked and the replies thereto.

As already noted on p. 11 of this Synopsis, applications for mining concessions in which interrupted claims — ie., claims not consecutive — are asked for are admitted whenever all the claims are in the same municipality and upon the same mineral deposit. Otherwise, separate applications must be presented with reference to the claim or claims situated in each separate mineral deposit or. municipality.

In every case the applications must contain all the requisites above referred to, in order to be admitted. (C. Pom., October 31, 1899.)

A fifty-cent revenue stamp is required on every leaf of the application.

At such points of the Republic as may not be comprehended within the district assigned to any Mining Agent of the Min- istry of Fomento, applications for mining concessions may be presented to the local postmaster, who, in such a case, shall receive them and take note thereof, designating the day and the hour of presentation.

The postmaster must also give immediate notice to the Min- istry of Fomento by mail, and also by telegraph, where there is one. (R. L. min., Arts. 48 and 49.)

As soon as any application for a mining concession is pre- sented to a Mining Agent, he shall proceed immediately to register the same, in the presence of the applicant, with an entry of the day and the hour of presentation, as well as the ordinal number of the docket relative thereto, in the special registry book for applications for mining concessions, and also

‘Docket” is the best English equivalent I can find for the Spanish word ExpedimU.

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at the end of the application itself, and upon the duplicate thereof.

Said registry hook is to be paged and countersigned by the Ministry of Fomento.

The applications shall lie registered in the exact order of the date and hour in which they may be' successively presented, without leaving any blank spaces in the book between the different registrations. (R. L. min.. Art. 17.)

When an application has been admitted, no other can be re- ceived for the same site until after the Ministry of Fomento has entered a final ruling on the docket belonging to said con- cession, whether for full mining claims or gores. (R. L. min., Art. 16.)

In case of the simultaneous presentation of two or more applications for concessions of mining claims or gores for the same site, lots shall be drawn in the presence of the interested parties, to decide which of the applications is to be admitted and registered. (R. L. min.. Art. 18.)

Within the three days following the presentation and registry of any application for a mining concession, the Mining Agent shall appoint a graduated mining e-xpert, or, if there are none in that locality, a practical expert, to measure the claims or gores, and draw up the corresponding plan thereof. (R. L. min.. Art. 19.) See Sect. VII. of this Synopsis.*

Within eight days (or sixteen, if the time be officially ex- tended), the expert must communicate to the Mining Agent his acceptance or rejection of the appointment, and, in the first case, that he is already in accord with the applicant for payment of his fees. The Mining Agent shall enter the proper note thereof upon the docket, and designate at once for said expert a peremptory term of sixty days to finish and present his documents, giving him, at the same time, a certified copy of his appointment.

The Mining Agent shall then proceed to make out in dupli- cate a summary.

One copy of the summary shall be posted upon the Bulletin

See pp. 20 and 21 of this Synopsis. The provisions there stated are sub- stantially repeated here, as belonging under this Section also.

A Synopsis Of The Mining Laws Of Mexico.

Board of ttie Agency, and the revenue stamps for this announce- ment shall be demanded from the applicant.

Said copy of the summary shall remain affixed on the Bulle- tin Board for one month, of which note shall be made on the docket.

The publication of the summary has the effect of a summons to any one who may believe he has a right to oppose the application for the mining concession of which the summary treats.

Opposition is only admissible during four months from the date of the summary, as posted on the Bulletin Board of the Agency.

When the four months above noted have passed without op- position being made, or if the opposition is not one of those which interrupt the procedure of the applications for mining concessions, or if the docket has been returned by the tribunals with a final sentence, favorable to the applicant :

Within fifteen days next following any of the above, the Mining Agents, under their strictest responsibility, must make a copy of the docket, and send the same, with the copies of the plan, in a registered letter, to the Ministry of Pomento.

If the applicant wishes to take charge of the delivery of said documents, the Mining Agent may deliver them to him, and shall notify the Ministry of Pomento. (R. L. min., Art. 34.)

The Mining Agents cannot suspend the procedure of any mining concession for any motive whatever, unless in cases of opposition. (L. min., Art. 19.)

Stamps , — As already noted (p. 27), applications for mining concessions must have a fifty-cent revenue stamp on each leaf.

The reports made of mining surveys, with the plans, do not require revenue stamps, since stamps are not required on the plans themselves. IsTeither should stamps be used on the copies of the docket, because the original docket must contain the stamps provided for by law, and also because said copies are and should be regarded as official memoranda. (0. Pom. of October 19, 1892.)

The copies to be given to the mining expert surveyors of

A Synopsis Op The Mining- Laws Op Mexico.

their respective appointments must have a teu-ceut revenue stamp. (0. Hda. of October 29, 1892, and C. Fom. of FTovem- ber 12, 1892.)

Applications for a reduction in the number of claims must have a revenue stamp of fifty cents on each leaf. (0. Fom. of November 13, 1892.)

The prospecting permits made out unconditionally by private parties on their own lands do not cause any stamp tax ; but if they contain any conditions, of whatever nature, the permits shall be considered as contracts, and must have a revenue stamp of fifty cents per leaf.

But the notice that must be given to the local Mining Agent before commencing prospecting work in public lands does not require, in any case, the use of revenue stamps. (C. Hda. of August 20, 1892, and C. Fom. of October 17, 1892.)

However, such copies of the prospecting permits as may be published on the Bulletin Board of the Mining Agency must have, on each leaf, a fifty-cent revenue stamp. (0. Hda. of April 5, 1898.)

Any default in the presentation of documents, affixing reve- nue stamps, publications, payment of fees, attendance at con- ciliatory meetings {juntas), and, in general, in any of the pro- ceedings referred to above, which can be attributed to the applicants, will cause them to be held to have desisted from their application.

The docket formed by reason of any application for a mining concession is forwarded, after having passed through the preliminary stages, as above, to the Ministry of Fomento.

The docket is examined in the Ministry of Fomento, and, if approved, the making out of the title-deed will be proceeded with.

The deed will be remitted to the Mining Agent for delivery to the interested party, together with one copy of the plan, sealed by the Ministry of Fomento.

The Ministry of Fomento will send to the Treasury Depart- ment a detailed notice of the concession as made.

. If the docket is not in form for approval, the proper obser- vations thereon shall be made to the Mining Agent, so that the deficiencies noted may be corrected within a term to be

A Synopsis Of The Mining Laws Of Mexico.

fixed by the Ministry of Fomento. If the said deficiencies are not so corrected, and are the fault of the applicant, the appli- cation shall be declared to have been abandoned by the appli- cant’s delay ; and an applicant thus declared dilatory cannot repeat the same application.

If the Mining Agent has caused the delay in the procedure, he will be held responsible, without prejudice to the applicant. (L. min., Art. 19, and R. L. min., Art. 3Y.)

Applicants are not under the necessity of appointing a rep- resentative (attorney in fact) in the Capital of the Republic to attend to the proceedings about the docket or to receive the title-deed.*

The title-deed will be sent to the Agent for delivery to the applicant, if he has not already designated, in the application itself or in another special writing sent to the Ministry of Fo- mento, some person in the Capital of the Republic who may receive the title-deed. (C. Fom., July 1, 1892, and a special ruling of the Ministry of Fomento.)

When the title-deed has been made out in favor of the con- cessionary, he enters at once into possession of his claim or claims without other formality. The title-deed produces all the legal effects of a transfer. (L. min., Art. 18, and C. Fom., July 1, 1892.)

IX. Amplification, Reduction and Rbmbasurement of Con- cessions : WiTHDEAWAL OF APPLICATIONS.

Amplification , — The owners of any mining property may ask for an increase of the number of their claims, and for this purpose must subject themselves to the proceedings laid down for applications for a concession.

The plan, which is to be drawn up by an expert in case of an increase of claims, shall include only the new claims which it is desired to acquire, showing the position of these with ref- erence to the first property; the landmarks shall be placed upon the boundaries of the new concession. (R. L. min., Art. 42, and C. Fom., September 3, 1892.)

The applicants for a mining concession may ask for an in-

As to this, see note, p. 25.

A Synopsis Of The Mininh Laws Op Mexico.

crease of the numter of claims therein before the publication of their application upon the Bulletin Board.

The Mining Agents shall note this application for increase on the first application, on the duplicate thereof, and in the Registry Book of the Agency, and shall also publish the sum- mary of the application with the proper correction.

If the increase is desired after the publication of the sum- mary, it will be necessary to withdraw the former application so that a new application may be at once presented. (0. Fom., August 1, 1892.)

Reduction , — The reduction of the number of claims, applied for or in actual possession, must be solicited in writing, with a fifty-cent revenue stamp on the application.

If the reduction is applied for before the publication of the summary, it will be sufficient to have the petition endorsed upon the original application, upon the duplicate, and in the Registry Book.

The summary should be published as corrected,, and there will be no necessity of making a new application.

If the reduction is asked for after the publication of the sum- mary, the original application must be abandoned, and a new application presented. (C. Fom., August 1, 1892.)

A reduction of the number of claims acquired under the new law does not require a new title-deed to the property.

The Mining Agent before whom the new application is pre- sented, accompanied with the corresponding title-deed, shall appoint an expert, who, at the expense of the applicant, and within a convenient term which the Mining Agency shall allow for the purpose, shall make a plan of the reduced property, and shall locate the necessary monuments according to Regu- lations.

A reduction of the number of claims can only be applied for during the four months time allowed as above, and counted from the date of the posting of the summary on the Bulletin Board (page 29), or after the issuing of the title-deed. (0. Fom., January 17, 1901.)

The Mining Agent shall also make a note of the reduction, as asked for and as authorized, on the register of applications for concession and on the title-deed of the property, which shall

A SYNOPSIS OP THE AlINING LAWS OF MEXICO,

be delivered to the interested party, together with a certified copy of the proceedings.

The docket shall be terminated with the notice of the reduc- tion, which should be immediately given to the local office of the Eevenue Stamp Tax.

In the case of a reduction of the number of claims acquired before the mining law of June 4, 1892, the procedure will be the same ; but in this case the Mining Agent must conform to the provisions of the circular sent out by the Ministry of Fo- mento on August 30, 1892.

The Mining Agent must make due mention of all cases of reduction of the number of claims in the monthly report which he has to forward to the Ministry of Fomento. (C. Fom., Sep- tember 3, 1892.)

If the reduction of the number of claims should be made before the expiration of the term of four months, which the law allows for the completion of the docket relative to any con- cession, it will not be necessary that the interested party should desist from his original application.

In such cases the following procedure shall be observed :

First — If the application for a reduction should be pre- sented before the surveyor expert has made the survey, the Mining Agent shall give notice to the surveyor, so that the sur- vey shall be made in accordance with the desires of the party in interest.

Second . — If the expert shall have already presented his re- port, the Mining Agent shall make a new appointment, so that the reduction may be made at the expense of the applicant, and within a term which shall not exceed the time remain- ing for the expiration of the four months allowed by law for the surveys.

In either case the Mining Agent shall make a note of the re- duction in the docket, and shall bring it to public notice by means of the official newspaper of the State, and by a notice on the Bulletin Board of the Agency.

It is understood that the publication made in the newspaper shall be at the expense of the interested party. (C. Fom., ITo- vember 20, 1893.)

The time for the publication of the notice shall be fifteen days.

A Synopsis Op The Mininh Laws Op Mexico.

New applications for the concession of ground now left free shall only be admitted and registered after the expiration of said term.

The party interested in the reduction shall be obliged to pre- sent to the Mining Agent, before the termination of the pro- ceedings relative to his application, one copy of the official newspaper in which the proper publication has been made.

If the reduction shall be applied for, and if any requisite of the law or regulations has been uncomplied with in the ante- rior procedure, the Mining Agents shall note the circumstance in the docket relative thereto ; the reduction shall not be pro- ceeded with ; and, when the proper term has expired, the docket shall be forwarded to the Ministry of Fomento for the corres- ponding decision relative thereto. (C. Fom., March 1, 1897.)

JRemeasurement — Whenever a remeasurement is applied for, it shall be subject to the same procedure and requisites as are determined for mining concessions. (E. L. min.. Art. 42.)

For the purpose of explaining the anterior provision of the law, the Ministry of Fomento, by circular of September 3, 1892, prescribed the following ; In cases of rectifications, when it is only sought to repeat the measurement of the claims on the ground, in order to place them exactly in agreement with the title-deed, the procedure will be the same as for a new con- cession, and the monuments, or landmarks, should be placed according to Regulations ; but as the making out of a new title- deed is not required, the docket must terminate with the de- livery, which the Mining Agent will make to the interested party, of a certified copy of the operations as practiced.

But if the purpose of the rectification is to correct any errors that may exist in the title-deed, the law demands the drawing up of a new title-deed, and hence the entire proceeding is the same as for new concessions.

Withdrawal of Application . — An applicant may withdraw an application for a mining concession, after or before the publica- tions, by appearing in person, or by writing.

If the withdrawal is made before the publications, and by appearance, it will be sufficient for the appearance to be spread upon the docket ; the minute to be signed by the applicant for the docket and placed in the archives.

If the withdrawal should be made in writing, the document

A Synopsis Of The Mining Laws Op Mexico.

shall be added to the docket, which shall then be placed in the archives.

If the withdrawal should be made during the publication of the advertisements, these shall be taken down from the Bulletin Board of the Agency where they are being published, and the same procedure shall be followed as in cases of withdrawal by appearance or in writing before publication.

In the case of a voluntary withdrawal, when all the legal requisites have been complied with in the proceedings upon the docket, the Mining Agents shall proceed to make a proper publication thereof on the Bulletin Board for a period of fifteen days, and until this period is concluded no applications for a concession which may be presented, covering the same ground, shall be received or registered.

If the application for a withdrawal shall have been presented in any case in which the requirements of the Law and of the regulations shall not have been fully complied with in the an- terior procedure, the Mining Agents shall note the non-com- pliance in the respective docket, the application for withdrawal shall not be acted upon, and when the time laid down in the regulations has expired the docket shall be remitted to the Sec- retary of Fomento for an appropriate disposition of the same. (C. Fom., March 1, 1897, Secs. 3 and 4.)

It should be noted that any omission in the presentation of applications, the supplying of stamps, publications or advertise- ments, payment of fees, attendance upon hearings, and, in gen- eral, the omission of any one of the proceedings prescribed for the obtaining of a mining concession or for making opposition thereto, whenever such an omission is imputable to the appli- cant or to the opposers, will be the cause, for the applicants, of considering them as having desisted from their application for a concession, and for the opposers of considering them as hav- ing desisted from their opposition and as being in conformity with the claims brought forward by the applicants. (R. L. min., Art. 36.)

X. Proceedings in Opposition: Mining Litigation: Penal

Jurisdiction,

The publication of the summary in each case of application for a mining concession has the effect of a summons to all those

A Synopsis Op The Mining Laws Of Mexico.

who may believe that they have a hight to oppose the applica- tion in question. (R. L. min., Art. 22.)

Any opposition that is commenced against an application for a mining concession must be presented within the four months ensuing from the date of the summary, which is published in every case on the Bulletin Board.

Apart from this, any opposition, to be admissible, must be founded upon one of the following motives :

1. iSTonconformity of the owner of the ground.

2. Invasion of contiguous claims or gores.

3. An anterior property in or application for the claims or gores now applied for, or some part thereof. (E. L. min.. Art. 26.)

If the opposition should be founded upon some other mo- tive, different from the three just mentioned, the Mining Agent shall confine himself to attaching the document to the docket, without suspending the course of the latter. (E. L. min., Art. 32.)

When opposition is made by the owner of the ground, alleg- ing that the mineral deposit in question does not exist, and when from the report of the surveyor expert it appears that there are indications of the mineral on the surface of the ground, or a prospect-hole, or prospect-work of any kind in the deposit itself, the Mining Agent shall decline to hear the protest, and shall continue the proceedings on the administrative docket until their termination, so that the Ministry of Fomento may award to the applicant the property in question, which is under- stood to be only the underground mineral right. In any case, the area and price of that part of the surface to be occupied by the miner are always subject to a judicial decision. (L. min., Art. 20, and E. L. min., Ai't. 30.)

In the case that there are no indications of a mineral de- posit on the surface of the ground, nor any prospect hole, or exploration of any kind, see under Expropriation, Sect. XII. of this Synopsis, for the course to he followed. The court will decide whether a mining concession is to be granted or not, and the decision may be appealed from.

Except in the two preceding cases, the Mining Agents shall suspend the proceedings upon applications for concessions, whenever an opposition is presented thereto. (L. min.. Art. 19.)

A Synopsis Of The Mining Laws Of Mexico.

WhenoTer an opposition is presented, the Mining Agent shall advise the applicant thereof by means of a notice, during three consecutive days, on the Bulletin Board (of the Agency), giv- ing the name of the opposer and of the applicant, and the ordinal number of the docket corresponding thereto. In this docket shall be made a note of said notice being published. (R. L. min.. Art. 27.)

Except in the case that the applicant may present himself in the Agency to manifest that he withdraws his application, the Mining Agent shall order the document of opposition to be reserved until he shall receive the report and plan of the sur- veying expert, (R. L. min., Art. 28.)

On the same day in which the latter documents are received, the Mining Agent shall summon the interested parties (appli- cants and opposers) to a meeting within the ne'xt fifteen days, by means of a notice on the Bulletin Board during three con- secutive days, in wRich notice shall simply appear the number of the docket, the names of the interested parties, and the day and hour of the meeting.

At the meeting the Mining Agent shall endeavor, above everything, to reconcile the dissentients and to avoid judicial questions. A note of all these points shall be made on the docket. (R. L. min.. Art. 29.)

If the Mining Agent does not cause an agreement between the interested parties, he shall suspend all proceedings and deliver the docket to the applicant, so that under his responsi- bility, and within a prudent term to be fixed by the Mining Agent, said applicant shall present the docket to the local Judge of First Instance, to whom it may belong. (E. L. min.. Art 31.) See below, in this Section.

When the opposition has been presented after the plan and report of the surveying expert have been received, but before the expiration of the four months’ term fixed by law, the above proceedings for an agreement shall be followed as far as appli- cable, this being the only case, except that in which the docket is to be sent to the courts, in which the Mining Agencies may postpone the proceedings up to thirty-five days beyond the four months prescribed for the procedure in the docket, provided that the opposition shall be presented less than twenty days before the day on which the term of four months is to expire. (R. L. min., Art. 33.)

A Synopsis Of The Mining Laws Of Mexico.

When the aforesaid four months shall have expired without any opposition appearing, or if the opposition is not one of those that interrupt the procedure, or if the docket has been returned from the Tribunals with a final sentence favorable to the applicant, the Mining Agency, under the strictest respon- sibility and within the next fifteen days, shall make a copy of the docket, and shall remit the same, together with the copies of the plan, in a registered package, to the Ministry of To- rn ento, unless the applicant prefers to take charge of the for- warding of said documents, in which case the Mining Agency shall so inform the Ministry of Fomento. (R. L. min., Art. 34.)

Mining Litigation . — Any lawsuits about mining matters shall be carried on in the Federal District, or in the Federal Terri- tories, or in any State, by the judges and tribunals which may there be competent, according to the provisions of the Code of Commerce, observing the rules laid down in Book F., Title I, Chapter IX., of the said Code, with the condition that the preferential working expense, indicated in Article 1030 of said Code, Sec. II., is the payment of the mining tax. (L. min., Art. 27.)

PenalJiiTisdiction , — The crimes and misdemeanors committed officially by the Mining Agents shall be tried before the Dis- trict Judges (Federal Judges) acccording to the proper laws.

Common crimes and misdemeanors committed in the mines shall be subject to the jurisdiction of the local judges, without prejudice to the power of the Federal authorities to impose a ministerial punishment. (L. min.. Art. 31.)

XL Metallurgical Works,

The term hacienda de benejicio is applied most usually to mills where gold- and silver-ores are treated by amalgamation.

The establishment and working of amalgamation-mills, as well as that of all classes of metallurgical works, is governed by the provisions of the ordinary laws; that is to say, by the same laws as apply to the establishment of any other kind of industrial or manufacturing business, and as relates to taxes thereon by the Law of June 6, 1887, Arts. 7 and 8.

Said law provides that amalgamating-mills and metallurgical works, when in operation, shall pay to the State where located.

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or to the General GoTernment, if in the Federal District or in the Territories, as the only tax, which cannot be increased, np to six dollars per thousand upon the value of the buildings, with their machinery, and that every other tax, excejit the Stamp Tax, is strictly prohibited.

The products of metallurgical smelters, in the form of ar- gentiferous lead, are exempt from exportation duties up to a content of 7 thousandths of silver, whenever it shall have been so specified in special contracts.

The excess of silver over the above content shall be subject to the payment of duties. (C. Hda. of February 25, 1892.)

Metallurgical establishments, working under prior contracts with the Government, in force on March 27, 1897, are excepted from the payment of the Coinage Tax upon the silver they may export directly, as long as the silver content of the argentiferous lead does not exceed 7 thousandths and the silver content of the argentiferous copper is not over 20 thou- sandths.

If these limits are exceeded, the said establishments must pay the Coinage Tax upon the excess.

This exemption only applies to the products originating in the establishments that have a franchise, but not to the products which these may acquire from other establishments. (L. met. prec.,Art. 9.)

Metallurgical companies may obtain a special concession from the Secretary of the Treasury to effect, in their own es- tablishments, the presentation of the products intended for export, so that the local Federal ofidcers may thereupon perform the assays and form the account of the taxes and duties to he paid.

The establishments exempted, under contract, from the pay- ment of Coinage Tax upon argentiferous lead and copper of a less amount than 7 and 20 thousandths of silver, respectively, must, when they employ the products of other metallurgical establishments, pay the 2 per cent. Coinage Tax upon the total value of the silver contained therein before such products are employed for subsequent operations.

The origin of their products must he proven by metallurgi- cal establishments at the Custom House or in the Government assay offices, in the manner laid down by law. (R. L. met. prec., Art. 2.)

A Synopsis Of The Mining Laws Of Mexico.

Concessionaries under the law for the exploration and work- ing of gold-mines and placers, published June 6, 1894, should have installed, within the minimum term of two years from the date of their contract, a metallurgical establishment with suf- ficient capacity to treat 400 tons of ore weekly, or, in place of said establishment, some other works equivalent in value to said establishments, at the discretion of the Secretary of romento.

Note. — Water-rights for niiniag or metallurgical purposes, if upon navigable or jS-oatable streams, would have to be acquired from the Federal authorities, under the provisions of a special law to that effect.

Upon other streams the water-rights would have to be acquired hv concession from the Government of the State where located.

XII. Expkopriations for Mining Purposes.

The marking out and measurement of the mining concession does not imply any right to the occupation of the surface prop- erty. The owner of the mining concession should understand that he must arrange with the owner of the land, whenever he may find it convenient to do so, for the acquirement of such a part of the surface as he may need to occupy for the dependen- cies of his mining business, or of the totality of the surface marked out for his miniug claims (in the case of placers or superficial deposits).

This arrangement may be amicable, through a contract with the owner, or by expropriation, through initiation of the proper legal proceeding. (K L. min.. Art. 40.)

The workings required for the exploitation and utilization of mines and placers are considered to be of public utility, where- fore, in case of disagreement, there may be a forcible expropri- ation of the ground necessary for such purpose. (L. min., Art. 10 .)

If, for any reason, the owners of a mining concession cannot agree, either upon the area of the land which it may he neces- sary to occupy for the exploitation of mines and placers, or upon the price thereof, with the owners of the surface ground, the expropriation shall be decreed by the J udge of First Instance, observing the following procedure:

1. Both parties shall appoint their own expert appraisers, who shall present their estimates to the judges within the eight

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days following, counted from the day on which they were ap- pointed.

If the estimates should be discordant, the judge shall appoint a third expert as umpire, who must present his opinion within an equal period.

The judge, taking into account the opinion of the experts and the proofs which may have been rendered by the parties while the experts were forming their report, shall determine within the following eight days the superficial extension that is to be occupied and the amount of the indemnity.

The decision of the judge shall be carried out without further recourse than that of responsibility (of the judge).

2. If the owner of the ground to be occupied should not appoint his expert within the term of eight days after being notified by the judge, the latter shall appoint judicially an appraiser who will represent the interests of the land-owner.

3. If the possessor or owner of the property should be un- known or doubtful, the judge shall determine, as the amount of the indemnity, the sum which may be the result of the exami- nation by the appraiser appointed by the concessionary of the mine and the appraiser appointed by the judge to represent the legitimate owner. Said sum shall be placed on deposit, to be delivered to the person to whom it may belong.

Note. — T he mining lawaimake no provision for the expropriation of water or of wood.

The right of way to mines and to open roads would have to he obtained under the ordinary provisions of the Civil Code in force where the mines might be located.

Xni. Easements and TuNNSL-EiaHTS.

Mining properties and common properties — i.e., real estate not used for mining purposes which, adjoins mining properties — shall possess and enjoy (or suffer, as the case may he) the legal servitudes of right of way, right of aqueduct, right of drainage, and right of ventilation.

For the imposition of said servitudes, and for the assessment of damages corresponding thereto, the judges shall subject themselves to the laws of each State, and to those of the Fed- eral District, and of the Territories, when said laws are not modified by the following rules (L. min.. Art. 12) :

1. The legal servitude of drainage consists of the obligation

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whicli the owner of one claim incurs to indemnify the proprie- tor of another claim for loss and damages which may be occa- sioned by not maintaining the said drainage of the subter- ranean workings, or by not maintaining the said drainage as much as may be necessary, so that the water flows from the first to the second claim.

Also, in the obligation which all claim-owners have to permit, through their claims, the passage of tunnels or counter-mines, whose exclusive object is the drainage of one or more work- ings.

2. Drainage-tunnels, when not made by mutual agreement, may only he undertaken by the owner or owners of certain claims, for which the said tunnel is an absolute necessity.

3. For the case provided for in the foregoing rule, all the owners of claims that are improved by the drainage secured by means of the tunnel are bound to pay an indemnity in pro- portion to the benefits received, account being taken of the nature of each mine, and according to the state thereof.

4. The opening of mining-tunnels shall not be commenced without previous license, conceded by the Ministry of Fomento, after hearing the opinion of the local Mining Agent, and after examination and approbation of the plans upon which are de- tailed the course and cross-section of the proposed tunnel. See Rule 22.

5. Any pay-ore which may be found while opening the mining-tunnels, if it is found within claims that have been legally conceded, is the property of the owner of such claims ; and if it is found within free ground, it shall be divided be- tween the owners of all the claims improved by the mining- tunnel, according to the proportions laid down in the foregoing Eule 3.

6. If, where a mining-tunnel has been undertaken, one or more veins in free ground are discovered thereby, and if appli- cation is made for the concession of the respective claims or gores, the rules as to applications for concessions shall be applied.

The tunnel-owners in this instance shall be considered as explorers ; so that, during three months subsequent to the noti- fication, applications for the concession of the claims in ques- tion can be accepted from them only.

A SYNOPSIS OF THE illNING LAWS OF MEXICO.

7. Whenever the Ministry of Fomento has authorized the license referred to in the foregoing Eule 4, only by express contract can any other persons, apart from those that are men- tioned ill the license as benefited by the mining-tunnel, be con- sidered as undertakers of the tunnel.

8. The owners of claims traversed by the drainage-tunnel may place their own confidential inspectors within their re- spective claims while the tunnel is being opened. The func- tions of the inspector are limited to watching the work, and reporting to the Mining Agent, or to the corresponding judge, in the proper case, such abuses as he may observe.

9. At those points of drainage-tunnels where they commu- nicate, for any reason, with mine-workings, gratings shall be fixed as soon as the communication is opened, to prevent transit or passage.

10. Only in case of unanimous consent, expressed in a public deed made by all the interested parties in a general drainage- tunnel, according to the foregoing Eule 3, may said tunnel be destined to other uses than to those of drainage.

In this case there shall be stipulated in the contract, under penalty of nullity, all the particulars referring to passage or transit, such as are indicated in the foregoing Eule 9.

11. Mines which may be newly opened, at a point where they may be benefited by a general drainage-tunnel already in existence, shall be subject to the foregoing Eules 3, 7, 8, 9 and 10.

12. The legal servitude of ventilation consists of the obli- gation, which every owner of mining-claims assumes, to permit the proprietors of contiguous claims to open communication with his interior workings, whenever such communication will produce, as a necessary result, a ventilation which could not be obtained in any other manner, except at great expense.

13. Unless there is an express contract to the contrary, drawn up in the form of a public deed, between the owner of the dominating property and the owners of the serving property, gratings to prevent passage or transit shall al- ways be placed upon the boundary-line of the respective properties.

14. Whenever a communicating working, not among those mentioned in the foregoing Eule 12, shall, in fact, ventilate

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two or more workings, this service of ventilation shall not con- fer on the mine-owner who opened the communication any right to demand compensation from the owners of the other workings so ventilated, nor shall the said owners, in their turn, acquire any legal servitude as an encumbrance upon the mining property which causes the ventilation.

15. If pay-ore should be met with during the progress of a working opened for the purposes indicated in the foregoing Eule 12, the provisions of Eules 5, 6 and 8 shall be observed wherever applicable.

16. Also, whatever is applicable of Rule 4 shall be ob- served.

17. All the expenses that may be incurred by the work- ings which are to be opened to secure ventilation, and those of the subsequent ventilation of the same, shall be at the ex- clusive charge of the person who solicited the constitution of a servitude.

18. In the future, for the imposition of a legal servitude, as an easement of any mining property, or as an encumbrance to another, there shall be required, either the consent of the owner of the serving property, expressed in a public deed, or by a declaration signed and ratified before a judicial authority, or before the Ministry of Pomento ; an administrative de- cision, consented to by the interested parties; or a judicial decision.

19. The owner of claims in whose favor it is supposed that a legal servitude is to be established, but who does not succeed in securing the consent of the party by whom it is presumed the servitude should be granted, must present himself before the Ministry of Fomento.

The Ministry, with the formalities and within the term pre- scribed by the Regulations, shall decide whatever it may deem proper, but always after a hearing of the dissident.

If the latter party or the applicant should not be willing to abide by the administrative resolution, the right shall be re- served to appeal to the proper local tribunals, within the term fixed by the Regulations.

The final decision shall be communicated by the tribunal which pronounces it to the Ministry of Fomento.

(See Rules 23 and 24.)

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20. If the administrative decision should be favorable to the applicant, and adverse to the opposer, said decision can only be immediately put into effect after the filing of a proper bond by the applicant to compensate losses and damages, in case the opposer should obtain a final decision in his favor before the courts.

21. The three preceding rules are applicable to all the cases in which the provisions of any of the other rules shall or might give rise to a judicial question. (L. min., Art. 12.)

22. For the imposition of the servitude of a mining tun- nel, as referred to in the foregoing Rule 4, there shall be presented the application made to the local Mining Agent for a permit, which shall be accompanied by the horizontal pro- jection (plan) and section of the tunnel, both to an appropriate decimal scale, as well as the sections and other details which are believed to be proper to illustrate the nature and circum- stances of the projected works.

The Mining Agent shall forward to the Ministry of Fomento, together with the application and the corresponding plans, a report upon the subject, which shall contain his own opinion, founded on the data.

The said Ministry, in view of said documents, and of siny other data which it may think proper to ask for, shall decide upon the proper course. (R. L. min., Art. 45.)

23. The owner of any mining claims, in whose favor it is supposed that an easement ought to be established, and who does not obtain the consent of the person by whom it is sup- posed the servitude should be borne, may present to the Min- istry of Fomento, in accordance with the provisions of the fore- going Rule 19, the corresponding application, accompanied by all the necessary data.

The Ministry, in view of the report of the local Mining Agent, and previously hearing the dissident, or his representa- tive, shall determine whatever it may think proper within the terms which it may fix, under the circumstances of each case. (R. L. min., Art. 46.)

24. If the applicant for the easement referred to in the same foregoing Rule 19, or the party who should bear the servi- tude, should not be willing to conform with the corresponding decision of the Ministry of Fomento, he may go before the

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proper judge, provided he shall do so within a term of not to axceed two months from the date of said decision. (R. L. min., Art. 47.)

That part of the tunnels situated outside of boundary lines is exempt from the mining tax, when the said tunnels are exclu- sively designed for ventilation, drainage, and the extraction of minerals which do not come from the tunnel itself. (L. min., Art. 83.)

XIV. Mining Contracts and Companies.

A contract in virtue of which money or goods are furnished to the owner of a mine for the working thereof was called avio ;for which the nearest English equivalent is habilitation) in the older mining laws of Mexico.

Such a contract is at present either a partnership or a mort- gage. (L. min., Art. 25.)

The mining law of June 4, 1892, provided expressly in Article 5, transitory, the following:

The contract of avio and all contracts relative to mining affairs which may be in existence when this law commences to be in force, shall be construed by their own stipulations and on omitted points according to the mining legislation in force at the time when the contracts were made.

But it shall be indispensable for the validity of future acts depending upon said contracts that said contracts should be registered according to the provisions of Articles 24 and 25 of this law within the term of one year from the time of the law coming in force.

In consequence, if in any case a mining business is trans- ferred by any title to a third party, said third party shall be bound by all obligations proceeding from the contracts referred io, since these produce realty rights of action in law.

Stock-companies or partnerships that may be formed for the exploitation of mines shall be governed by the provisions of the 3ode of Commerce, except those relating to monetary associa- ions, which are not applicable to mining business. (L. min., irt. 24.)

Note. — The part of the Code of Commerce above referred to comprises Arti- les 268 to 271, inclusive, which are not applicable to mining affairs.

A SYIsOPSIS OF THE MINING LAVS OF MEXICO. 47

Every mining company or partnership is obliged to register itself at the county seat of the county or judicial district where the mining-claims that form the object of the business are situ- ated, as well as at the domicile or domiciles which the said partnership or company may have in the Republic. (R. L. min,, Art 54.)

XV. Fokeigners and Foreign Companies.

Foreigners enjoy in the Mexican Republic the same civil rights as the citizens thereof and the guarantees of the Federal Political Constitution, See. 1, Title I.

Foreigners may therefore apply for prospecting permits and mining concessions, and have the same awarded to them, provided they are not located within the twenty-league limit.

It is to be noted that any foreigner who may acquire real estate (including mines) in the Mexican Republic, and who does not manifest, at the time of said acquisition, his intention to preserve his nationality, is reputed to be a Mexican citizen. (Federal Political Constitution, Art. 80, Sec. HI.)

According to the law of February 1, 1856, still in force, no foreigner can acquire, without previous permission, real estate in the frontier States or Territories, unless at twenty leagues distance from the frontier line.

Whenever a foreigner shall present an application for a con- cession to acquire any mining property located within the above- named limit, he must send, at the same time, his application for permission, through the local Governor, to the Ministry of Fo- mento, so that the said permission may be passed upon, in one or the other sense, whenever the period may arrive for the granting of the title to the mining concession as applied for. (C. Fom. of September 5, 1892.)

As to the registry of foreign corporations that may desire to establish themselves or to found branch houses in this Repub- lic, see Sect. XVI. of this Synopsis.

Foreigners who have applied for mining concessions within the twenty-league zone above referred to must present the authorization of the Government to hold mining property within the zone within the period of four months, which is fixed according to law for the completion of the docket rela- tive to the concession. (Page 29 of this Synopsis.)

A Synopsis Op The Mining Laws Of Mexico.

Foreigners wlio may acquire mining property are subject, in everything that relates thereto, to all the laws in existence or that may be framed hereafter relative to the transfer, use and preservation thereof, as well as to the payment of the respective taxes.

Said foreigners cannot at any time plead any rights as for- eigners with respect to the above matters. (Law of February 1, 1856, Art 5.)

Consequently, all questions with respect to mining prop- erty owned by foreigners in this Republic must be tried be- fore the Tribunals of this Republic and according to its laws, to the exclusion of any foreign intervention whatever, (Law cited, Art. 6.)

Any contract for the rental of mines made with a foreigner for a longer term than ten years is to be reputed as a transfer of the property. (Law of May 28, 1886, Art. 31.)

Foreign corporations in Mexico enjoy the same rights as are conceded to them by the laws of their own country, provided that these rights are not contrary to the laws of the nation. (Law of May 28, 1886, Art. 5.)

XVI. Registry of Mining Transactions.

The oiEces which have charge of the public register of prop- erty; in default of these, the mortgage offices; and in default of both, the Judges of First Instance of the common (State) law, shall keep an especial book for the registry of mining transactions. (L. min., Art. 25; R. L. min., Art. 61; and Code of Commerce, Art. 18.)

Registration is obligatory with respect to contracts of part- nership or of companies, and is optional with respect to title- deeds of mining concessions or property.

The Register Book is to be filled up according to the chrono- logical order of the presentation of documents, and the follow- ing items must be inserted therein, as nearly as may be :

1. The name, title or social designation of the concern.

2. The class of operations to which the concern is de- voted.

3. The date on which it will commence or has commenced its transactions.

4. Its domicile, specifying the branch-houses it may have

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established, although these branches must also be registered where situated.

5. The contracts of association of every partnership or com- pany, whatever may be its object or denomination, as well as the contracts for modification, abrogation or dissolution of the same.

6. The minutes of the first general meeting and the docu- ments annexed thereto, in the case of stock-companies which were organized by public subscription.

7. General powers of attorney, appointments, and the rev- ocation of the same, if such were conferred upon managers, agents, employees or other representatives.

8. The record of the increase or decrease of the money- capital of stock-companies or partnerships.

9. Title-deeds of mining property.

10. Issues of stock-loan certificates and bonds, giving the series and numbers of the certificates of each issue, their inter- est and payment terms, the total quantity of the issue, and the goods, works, franchises or mortgages (when there are such) which are responsible for the amounts.

Stock or obligations emitted by private parties should also be registered in the same way. (Code of Commerce, Art. 21 .)

Eailure to register the said title-deeds and other papers can- not affect unfavorably the rights of third parties; but said third parties may legally profit by such failure.

Notwithstanding the omission of the mining registry, any documents referring to real estate and to real property rights shall be valid against third parties whenever they may have been registered according to the common law. (R. L. min., Arts. 52 and 53, and Code of Commerce, Art. 26.)

The mining registry shall be made at the seat of government of the county or judicial district where the mine is located,' and, if a mining company is in question, also at the domicile thereof.

If, from the extension of the claims {j)ertenencias\ or for any other 'motive, there should be a doubt as to where the registry is to be effected, the Ministry of Fomento shall de- cide, and must communicate its decision to the Treasury De- partment. (R. L. min., Art, 56.)

VOL. . — i

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The inscription shall be made with the certified copy of the respective deed in band, or from the document itself, or from the wTitten declaration which the interested party may present, "whenever the deed to be registered may not be a public document.'’ (Code of Commerce, Art. 25.)

Note. — A public document” is one drawn up before a notary public, or some official of equal authority, or by some public officer, administrative or Judicial.

Documents proceeding from foreign countries, and subject to registration, shall he previously protocolized in the Republic. (Code of Commerce, Art. 25.)

Note. — When a document from abroad is to be protocolized in Mexico, it must be certified to by an Ambassador, Minister or Consul of Mexico. This cer- tificate is certified to by the Foreign Office here. The document is then ready to be protocolized — that is, spread upon the record of a Notary Public — if it is in Spanish.

If not in Spanish, it must be presented, with a translation, to some Court of First Instance in this Bepublic.

The Court appoints an interpreter to ascertain and certify the correctness of the translation, and the order is then given for the document to be put on record by the Notary Public. In any case the Notary retains the original document among his records, and issues a certified copy thereof, in Spanish, for use, which copy has the legal effect of the original document.

The Registers cannot in any case, or for any motive, refuse the entry of the documents that may be presented to them. (R. L. min., Art. 51, and Code of Commerce, Art. 31.)

Documents duly registered produce their legal effects from the date of the entry, and cannot be invalidated by anterior or posterior documents not registered. (R. L. min., Art. 51, and Code of Commerce, Art. 29.)

Foreign companies or houses which may desire to establish themselves or to establish branch houses in the Republic must present and have entered in the Register a certified copy of their statutes, contracts and other documents referring to their organization ; also, their inventory or last balance-sheet, if they had one ; also, a certificate of being constituted and authorized according to the laws of their respective countries.

This certificate must be made out by the Minister accredited by this Republic to that country, or, in default thereof, by the

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Mexican Consul. (R. L. min., Art. 51, and Code of Com- merce. Art. 24.)

Any change of ownership of a mining property must he notified to the Mining Agent or other officer in charge of the Register, so that the proper note can be made thereon. (L. imp., Art. 7.)

The Mining Agents of the Ministry of Fomento shall also keep a registry-book, paged and countersigned by the Min- istry of Fomento, in which must be registered all applications for the concession of mining claims or gores that may be pre- sented.

This registration shall be made immediately, in the presence of the applicant, with an entry of the day and hour of presen- tation, as well as the number of the respective docket.

Blank spaces are not to be left in the book between the sev- eral entries, and these must, in every case, be exactly subject to the order of their dates and of the hours in which they were presented. (R. L. min., Arts. 15 and 17.)

If two or more applications for a concession of mining claims or gores, covering the same site, should be presented simul- taneously, lots shall be drawn, in the presence of the interested parties, to decide which of the applications is to be admitted and registered. (R. L. min.. Art. 18.)

In the same registry-book the Mining Agents shall enter such reductions of the number of mining claims as are applied for and conceded. (C. Fom., September 3, 1892.)

XVn. Taxes ox Mixes.

Caducidad {Loss of Mining Projperty ). — The default of pay- ment of the tax constitutes the only cause of the loss of mining properties, which in this case become free of all liabilities and may be adjudicated to the first applicant who shall fulfill the legal requisites. (L. min.. Art. 29.)

The tax upon mining properties is a Federal tax, and is composed of two portions — one portion to be paid but once in revenue stamps, which are to be affixed to every title-deed to mining property, and the other to be paid annually. (L. min., Art. 28, and L. imp., Art. 1.)

A SYrOPSIS OF THE MINING LAWS OF MEXICO.

The Tax Upon Ilining Title-Deeds.

The revenue stamps for the title-deeds to mines of gold, silver and platinum shall be of the value of ten dollars, and shall be placed upon the said title-deeds at the rate of one revenue stamp for each claim (pertenencia) of ten thousand square meters, or fraction of a claim which is equal to, or more than, the half thereof. (L. imp.. Arts. 1 and 3, and L. of June 3, 1898, Art. 1.)

When the fraction shall be less than half a claim (whether this fraction is the whole property or whether it constitutes an excess over several claims), a revenue stamp for five dollars should be placed upon the first leaf and another revenue stamp of fifty cents upon the second leaf of the title-deed.

The title-deeds to mines which are not of gold, silver or platinum, and which require a legalized concession for their working, need only carry revenue stamps to the value of two dollars and fifty cents for each claim.

But these same mines shall carry the same stamp-tax (and other taxes) as those of gold, silver and platinum when the minerals found in said mine contain gold, silver or platinum in any proportion. (Law of June 5, 1898, Arts. 1 and 2.)

According to the law of October 31, 1892, the value of the revenue stamps which should be affixed to the title-deeds of mines or deposits of iron and mercury should be one dollar per claim (perteneneia) ; but the article referred to was repealed by the decree of June 3, 1898, according to which the revenue stamps on the title-deeds to such mines are to be of the value above stated.

The revenue stamps to be placed upon the title-deeds to mining property shall be canceled by the Ministry of Bomento, which Ministry will call upon the interested parties for the revenue stamps, either directly or through the local Agency, as soon as the docket has been approved and the title-deeds authorized to be made out. (L. imp., Art. 3, and C. Fom., Sept. 1, 1897.)

By the Mining Tax law of June 6, 1892, every mine-owner, or possessor, at that time and by any title, was obliged to pre- sent his documents in the local Sub-Treasury office within a fixed time, to have the proper revenue stamps affixed to his title, and also that a note might be made in the Eegister of

A SYIs'OPSIS OF THE MININa LAWS OF MEXICO.

the number of iiiertmendas in the property for the payment of the annual contribution. The time for the above finally ex- pired October 31, 1892.

Ajinual Mining Taxes,

Every owner or possessor of mines not of gold, silver or pla- tinum, and for whose working a legal concession is required, is obliged to pay annually the sum of two dollars and fifty cents for each pertenencia, (L. of June 3, 1898, Arts. 1 and 4.)

For mines of gold, silver or platinum the owners shall pay ten dollars per year for each pertenencia (claim of 10,000 square meters). (L. imp.. Art. 4.)

The mines first referred to above shall pay an annual tax equal to that of the mines of gold, silver and platinum when the ores encountered therein contain gold, silver or platinum in any proportion. (L. of June 3, 1898, Art. 2.)

Iron-mines or deposits, in whose favor an exception was established with respect to the annual impost of the law of October 31, 1892, have now become subject to the general law, according to Article 4 of the law or decree of June 3, 1898.

Fractional parts of pertenencia less than one-half of a claim (less than 6000 square meters) are exempt from the annual tax. (0. Fom. of February 16, 1898.)

Fractional parts of a pertenencia equal to or more than one- half a (equal to or more than 5000 square meters)

pay the same annual tax as an entire pertenencia. (L. imp.. Art. 1.)

The annual tax is collected by thirds of a year, in advance, through the oflices of the Eevenue Stamp Tax, to which the taxpayers must peremptorily present themselves without the necessity of a notice or of any other requisite on which might be founded a delay or excuse. (L. imp., Art. 5, and R. L. imp., Art. 11.)

The offices just referred to are the principal or subordinate Administrations of the Stamp Tax, but the Secretary of the Treasury may assign other offices to receive the tax in such cases as he may consider it just or convenient to do so, by giv- ing notice to the General Administration of the Stamp Tax, so that that office may communicate the fact to the Principal Ad-

A Synopsis Of The Mining Laws Of Mexico.

ministration of tire Stamp Tax, witMii whose jurisdiction the mine may he comprehended. (E. L. imp., Art. 30.)

Permission is frequently obtained to pay mining taxes in Mexico City when it is not convenient to do so in the district in which the mine is located.

Every third-of-a-year’s tax must be paid before the 31st of July, 30th of IsTovember and 31st of March of each year.

Eor said purpose the proper Administration, Principal or Subordinate, of the Stamp-Tax shall deliver to each interested party a schedule (holeto) which contains :

1. The name, Impuesto Minero"’ (Mining Tax), at its head.

2. The name of the State and Municipality to which belongs the office that distributes the schedule.

3. The name of the mine, number of pertenencias on which the taxis to be paid, municipality in which the mine is located, name of the owner, company or enterprise which is in posses- sion thereof, and the ordinal number of the register of the title-deed.

4. The amount of tax to be paid each third of a year.

5. Three blank columns destined to receive the revenue stamps corresponding to the thirds of a year, duly stamped.

The interested parties must be careful to fix the schedule referred to in a visible portion of the office of the concern." (E. L. imp., Art. 23.)

Duplicate schedules may be given out for the mining tax in case of loss of those which were given to the taxpayer at the time of the first payment. (Circ. Adm. Gen. Eenta Timbre, November 30, 1897.)

Any mine owner may pay his annual tax in advance, if it suits his convenience so to do. (C. Hda., November 10, 1892, Sec. 7.)

All kinds of metallurgical works, including amalgamation- mills and smelters, are taxed as under Sect. XI. of this Sy- nopsis.

Postsceipt.

Secretary’s Note.

It will be noticed that the foregoing paper has been copyrighted by the Insti- tute. This has been done but once before, when the paper of Prof. Posepny on '*The Genesis of Ore-Deposits” was similarly copyrighted. It is true that, ac- jording to Pule VII., “ the copyright of all papers communicated to, and accepted

Gems And Precious Stones Of Mexico.

bj, the Institute, shall be vested in it, unless otherwise agreed between the Council and the author.’’ But this provision is intended mainly to secure to the Council the right to give permission for free republication, by technical periodicals, of any Institute paper, in whole or in part. This permission is given cordially ; and duplicate blocks of illustrations are furnished at rates far below the original cost, to facilitate such republications — the desire of the Council being to increase in this way, as far as practicable, the circulation of each paper, and the consequent reward, in professional reputation, of its author. Hence the unnecessary for- mality of copyrighting each paper in the name of the Institute has been generally omitted.

The two exceptions to this practice were made to prevent republication in vol- umes issued for sale by enterprising publishers, and interfering directly with the sale of special volumes by the Institute.

In the case of Prof. Posepny’s paper, the wisdom of this exceptional measure has been shown by the great demand for the first special “ Pose pny volume,” and its greatly enlarged second edition. In the present case, the author is permitted to sell in the Bepublic of Mexico copies of his valuable compilation, in recogni- tion of the generosity with which he has freely placed the result of his labors at the disposal of the Institute, which, for its own protection, as well as his, has formally copyrighted the Synopsis.”

Gems and Precious Stones of Mexico.

By George Frederick Kunz, New York City.

(Mexican Meeting, November, 1901.)

Mexico has been famous for its silyer-mines ever since the Spanish conquest; but in respect to gems, although many va- rieties occur, yet only a few have been obtained in any im- portant amount. Considering the extent of country in Mexico and in the adjoining States of the Central American Republics, and the richness of mineral wealth that must surely exist there, our present knowledge of the occurrence of precious stones is remarkably small. The great prevalence of igneous rocks would lead us to anticipate the future discovery of many local- ities of gems and ornamental stones, when fuller scientific ex- ploration shall have taken place.*

At the present time the only gem-stone that is systematically mined in Mexico is opal, and the only important ornamental stone is tecali the so-called Mexican onyx. In addition to these may he mentioned the pink garnet, or rosolite, found in one

See Oem and Preeious Stones of North America. By George F. Kunz, New Tork, 1892, pp. 275-309.

Gems And Precious Stones Of Mexico.

locality in the State of Morelos, where it is worked to some extent, and the pyrope or Bohemian garnet, weathered out of igneous rocks, and gathered by the Comanche Indians in Chi- huahua, as those of Arizona and Hew Mexico are collected by H avajoes. Other garnet-localities are known, but have not been developed. Topaz, which occurs in some places, will be men- tioned later. Moreover, beautiful amethysts from Guanajuato are well known ; but while making superb specimens for the mineral cabinet, they rarely afford material for cutting.

Great interest attaches to certain semi-precious stones, used and highly valued in pre-Columbian Aztec times, of which the localities have been lost, or but recently rediscovered. Prom- inent among these is the precious and even sacred Chalchihuitl of the Aztecs, at one time supposed to be turquoise, but now more correctly identified with jade. Recent studies of the sources of this remarkable stone are cited below. Another is a fine amethyst, different from that of Guanajuato, which was worked into ornaments by the ancient natives. A third stone, used to a great extent by the Aztecs, is obsidian, or volcanic glass. The wonderful chipping and lapidary skill shown in their work on this material in Mexico has never been equalled elsewhere. The principal locality where this obsidian was mined is known, and has recently been described in detail; but there were doubtless other localities, since there are several varieties of the product.

Of the rarer gems, diamonds, ruby, sapphire and emeralds, few occurrences are reported, and no deposits are mined ; re- liable information about them is limited. Santiago Ramirez, in a work on the minerals of Mexico,* relates, on the authority of another person, that in the Mexican war of independence, Gen. Vicenzo Guerrero, while selecting a camping-place for his men in the State which now bears his name, but at a point not named, found some diamonds. Their mode of occurrence, however, as described, makes it almost certain that they were only brilliant crystals of quartz. They are described as having been found loose in the interior of large hollow pebbles, and were, in other words, geodes. Some of them are said to have been set in earrings, and to have been pronounced octahedral diamonds; and others were purchased by a lapidary at the

Noticia Sistorica de las Min&ras de Mexico,

G-Ems And Precious Stones Of Mexico.

capital. The accounts are vague; hut one specimeiij of three carats, is said to have been presented hj Gen. Guerrero to the museum of the Mexican College of Mines. If this crystal could be found and identified, there would be a clear under- standing of the facts.

Euby has never been positively found, though it has been reported from Durango, and at one or two other points. It is not at all certain, however, that these specimens were not pyr- ope garnets. A single rolled pebble of blue and white mot- tled corundum is the nearest approach to sapphire yet obtained. It occurred among pebbles of agate and chalcedony, and was brought from near San Geronimo, Oaxaca, by Dr. Knight Keftel, of Kew York, and identified by the writer.

Emerald, or perhaps only a finely-colored beryl, is reported from three points — the hill of Cerro Gordo, in Guanajuato; Tejupilco, in the State of Hidalgo, near Tulancingo, where it is found in mica schist ; and a locality in the State of Guerrero, from which a few small specimens of good color, but imperfect, are in the Escuela Minera Nadonal at the City of Mexico.

Garnet — The occurrence of choice pyrope garnets in Chi- huahua, near Lake Yaco, has already been mentioned. Fine ones are also reported from Sonora. They exist, doubtless, in many other localities in these portions of Mexico; for these garnets occur at various points in Arizona and Yew Mexico, and have been called Arizona rubies.” Another locality, at Triunfo, in Lower California, yields small bright crystals, evi- dently almandite, in a white granite. These are not pyrope, which occur in rounded nodular forms, in strictly igneous rocks. One or two other points are reported, but none of any importance.

Much the most interesting development of garnet in Mexico is at Xalostoc, in the State of Morelos.* Here the very perfect crystals have been found, dodecahedral in form, and up to a full inch in diameter. They are of a fine purplish pink color, embedded in a matrix of white limestone, with olive-green vesLivianite. Analysis proves these crystals to be a variety of grossularite ; but their color is so peculiar among garnets that the name rosolite has been proposed, and to some extent adopted

Carlos Sellerier on tlie Minerals of Mexico,’* Buffalo, 1901.

Gems And Pebcious Sionbs Of Mexico.

for them. The crystals are not transparent, and hence are not suitable for cutting as gems, though very attractive as speci- mens. The white or pale-gray rock, however, studded with the embedded pink garnets and yellow-green vesuvianite, makes a beautiful ornamental stone, and has been employed as such. Polished slabs and small columns of this “ rose-garnet ” rock may be seen in the principal museums of the United States, notably a fireplace and mantel in the American Museum of hTatural History, Hew York City.

Pour species of the garnet-group have thus been definitely recognized from Mexico : pyrope, or Bohemian garnet ; gros- sularite, in the pink variety just mentioned; essonite, or cinna- mon garnet, described by Damour as occurring in light-red dodecahedral crystals in limestone; and almandite. Other members of the group undoubtedly occur, but have not been definitely determined, and no important localities are as yet known.

Topaz. — Topaz has been observed at many localities in Mexico, from Zacatecas all the way south to San Luis Potosi. In the Tepazon mountains, southwest of the latter place, and at the Hacienda Tepezate, at Pinos, seventy-five miles north- west of it, fine crystals have been obtained. They vary from colorless to rich wine-yellow, and from one to three inches in length, and are sometimes double-terminated, with brilliant faces. At these places they occur either in an eruptive rock of the rhyolite series, like that at Thomas mountain, in Utah, or in a kaolin, which is doubtless the same or a similar rock, in a soft decomposed condition. Specimens of great beauty in the Berlin Museum, presented by Dr. Soriano, of Mexico, are labeled as from one or two other points near San Luis Potosi — “Mesa de San Jose Buenavista” and “ Mesa de Santa Cruz.”

In Durango and Guanajuato, topaz occurs in its characteristic association with tin-ores. At Ooneto, in the former State, it is abundant in connection with durangite and cassiterite, in the tin-bearing sands, resulting from the breaking-down of the trachyte rocks. The crystals are small, rarely over half an inch long, but brilliant, and of various tints, from colorless to yellow or pink red, and at times smoky black from included cassiterite. They are colored by tin in every case. At La Paz, in Guana- juato, large crystals, colorless or clouded, are found with tin-ore.

GEMS A:I) PEECIOUS stones of MEXICO.

At some other Mexican localities, colorless topaz crystals have been observed containing inclusions of rutile. These colorless topazes are believed to be in all cases the result of a natural bleaching-process, in which the original tint, probably yellow, has been lost by exposure and weathering.

The Mexican topazes are familiar as mineralogical speci- mens, but it does not appear that any systematic attempt has been made to develop the localities with a view to their use as gems. So far as known, none of them would aifford gems ex- ceeding a few carats in weight.

Turquoise , — This stone, although much used and highly valued by the Aztecs, is not known to occur in the present ter- ritory of the Mexican Republic. Many objects of ancient work — carved, inlaid, or encrusted with turquoise — are found in Mexico, and it was doubtless one of several kinds of green stones included under the name of chalchihuitl. But all the true turquoise so used evidently came from the mines in ISew Mexico, Arizona and California, where there are abundant evidences of extensive ancient working. Yet it may have been obtained from some locality since forgotten, as the jadeite locality has been.*

The Quartz Gems , — Clear crystalline quartz, or rock-crystal, was used by the Aztecs in the manufacture of some remarka- ble carved objects — particularly crystal skulls, which have at- tracted much attention among archseologists ; but where the material was obtained is not known. It is reported as occur- ring near Pachuca and Hidalgo, in the State of Michoacan, and in veins near La Paz, in Lower California. The center of the vein is said to be beautifully pellucid, while the sides are opaque white. It is possible, how’ever, that the larger pieces used for the carvings may have been brought from the remark- able locality of transparent rock-crystal in Calaveras county, California. The largest skull shows inclusions of prochlorite in the quartz of which it is made, a feature which also charac- terizes the Calaveras quartz.

Examples of these rock-crystal skulls are to be seen in the Blake collection in the TJ. S. National Museum at 'Washington ;

The masks, daggers and encrusted human skulls are more fully described on later pages of this paper, and in the writer’s work on Oem and Predom Stones of North Americaj already cited.

Gems And Precious Stones Oe Mexico.

the collection of the late A. B. Douglas, in the American Mu- seum of jSTatural History, Hew York city; and the Trocadero Museum in Paris. The largest one, however, is now in the Archaeological Department of the British Museum, for which it was secured hy Sir John Evans, during his visit to the United' States in 189T, by purchase from Messrs. Tiffany & Co. It weighs 175|- Troy ounces and measures 210 millimeters (8 in.) in length, 136 millimeters (5f in.) in width, and 148 milli- meters (5- in.) in height. The eyes are deep hollows; the line separating the upper from the lower row of teeth has evi- dently been produced by a wheel made to revolve by a string held in the hand, or possibly by a string stretched across a bow, and is very characteristic of Mexican work. Little is known of its history and nothing of its origin. It was brought from Mexico by a Spanish officer, some time before the French occu- pation of Mexico, and was sold to an English collector, at whose death it passed into the hands of E. Boban, of Paris, and then became the property of Tiffany & Co. That such large articles of wrought rock-crystal are not to be found in Mexico might lead one to infer its possible Chinese or J apanese origin. But it is evident that the workmanship of the skull is not Chinese or Japanese, since, in that case, nature would have been more closely copied ; while, if the work were of European origin, it would undoubtedly have been more carefully finished in some minor details.

Prof. Edward S. Morse, of Salem, Mass., who resided in Japan for several years, and Tatui Baba, of Japan, once of Hew York city, declare positively that this skull is not of Jap- anese origin. Mr. Baba gives as one reason for his belief, that the Japanese would never cut such an object as a skull from so precious a material.

In ancient Mexico there was undoubtedly a veneration for skulls, for we find not only small skulls of rock-crystal, but real skulls, notably the one in the Christy collection in the British Museum, encrusted with turquoise. It may have been one of these that suggested the making of this skull, the one at the Trocadero Museum, and the smaller one.

Two very interesting quartz crescents are known ; one in the Trocadero Museum ; the other in the collection of Prof. Maxwell Sommerville, in the Museum of the University of Pennsylva-

Gems And Peecious Stones Op Mexico.

Ilia. Beads of this material are sometimes found in the tombs with jadeite and other stone beads. They rarely have a diam- eter of an inch.

Labrets (lip-ornarnents) are occasionally found. But the wonderful crystal tablet now in the Field Columbian Museum, Chicago, is one of the most interesting and beautiful objects, made of Mexican rock-crystal, now in existence.

Among other varieties of quartz minerals, reference may be made to a prase or green quartz, which appears as a wrought material in some of the ancient articles of Aztec carving — notably a great votive adze in the British Museum collection, which has passed under the name of cJialchuit or chalchikidtl or jade. The source of this material is not known; it may be beyond the Mexican boundary or in Central America.

The amethysts from the silver-mines of Guanajuato have a world-wide reputation. They are found in large quantities, associated with pink and white apophyllite, and ranging in color from the most delicate lilac to the deepest purple. The crystals are frequently light in color at the base, but very much darker at the terminations. Groups a foot across are often obtained, but not good enough to cut as gems. It is certain, also, that fine amethysts were formerly found at some other locality in Mexico ; for collections, both in the United States and abroad, contain fine objects made by the Aztecs, but not at all resembling the Guanajuato mineral. They are deep purple, and more than 2 in. long, each being cut from a single crystal.

Chalcedony, agate, jasper, and the other varieties of quartz undoubtedly exist in abundance at many places in Mexico and Central America, judging from the numbers of objects, such as beads, figures and ornaments, shown in the collections. Some finely carved agate figures, 6 in. in length, are in the Blake collection in the United States Museum; and similar objects exist in the collections of other museums.

The name of Cyclops ” has been given to a peculiar occur- rence of red and white chalcedony in concentric layers of con- cretionary growth, evidently from a solution, found in Chihua- hua, about 1895, by Mr. E. J. Smith, of Chicago, who proposed the name. The specimens are, for the most part, small nodules, nearly hemispherical, and averaging half an inch in diameter. The center consists of a little nodule of red chalcedony, which

aEMS AND PRECIOUS STONES OF MEXICO.

is overlaid and surrounded by clear colorless clialcedony. When the convex surface is polished en cahoehon, the red center shows very strikingly, producing an eye-like effect; and the stones make attractive rings, scarf-pins and the like.

But it is the other species of silica, opal, that is by far the most important among Mexican gems, and the only one actually mined to any extent in the Eepublic. All the varieties of it are found both in Mexico and Central America; but the noble opal ’’ is more abundant in the latter than in the former country. The opal consists principally of silica, differing from quartz, however, in being never crystalline, and in containing from 3 to 12 parts of water in 100. The specific gravity of quartz is 2.65 ; of opal, about 2.2. Quartz has a hardness of 7, and opal of only 6, and even as low as 5.5.

Noble opal is the harder variety, in which the color is uni- formly distributed, and ranges from opaque white to almost the pellucidity of glass. Fire-opal or girasol is the variety show- ing flashes of red and yellow, green and other colors, the opal itself ranging from colorless to white, transparent yellow, red- dish brown to almost opaque. It is usually less hard than the noble opal. The names lechosos and zeasite are given by the Mexicans to the variety showing deep-green flashes of color. The name harlequin is applied to the variety in which the patches of color are small, angular, variously tinted, but evenly distributed. Common opal, so called, exhibits no play of color. This variety is found of many hues, chiefly, however, milky, pale green and rose-colored (when it is called quincite).

Hyalite, or Muller’s glass, is a colorless, transparent, jelly-like variety, usually occurring in botryoidal masses. Semi-opal is an impure variety of opal. When opal is mingled with agate or jasper it is called opal-agate or opal-jasper ; opalized wood is the name used when opal-silica, as a fossilizing agent, replaces wood; hydrophane is a variety that becomes transparent, and sometimes shows a play of colors, on being wet; and moss-opal is opal containing dendritic or moss-like markings, due to mi- nute crystalline enclosures of oxide of manganese or of iron.

Opal is mined in a number of States of the Mexican Eepub- lic, notably in Queretaro, Hidalgo, Guerrero, Michoacan, Ja- lisco and San Luis Potosi. The most extensive and important are those in Queretaro, at and near La Esperanza; but those

Gems Ais'B Precious Stones Oe Mexico.

at Zimapaiij in Hidalgo, have been known for a much longer time. In Guerrero, the chief localities are at Huitzuco and San Mcolas del Oro, where the material is described as trans- parent, streaked with red, green and blue. Magnificent gems have been obtained from this State ; and one opal mine-owner in Mexico is said to export thence from §10,000 to §12,000 worth yearly.

The Hidalgo opals have been referred to as the first that attracted extensive notice. Del Kio mentions that in 1802, in Zimapan, near the sanctuary of Guadalupe Hidalgo, hyacinth- red fire-opals were found in abundance in a red trachytic por- phyry; the same variety is mentioned by Sonnenschmidt as occurring in the mine of Toliman, in a trachytic conglomerate. John Mawe, in his work on precious stones, published in 1812, mentions these opals as having been sent to England in quanti- ties at that time. The fire-opal still occurs in its greatest per- fection in the porphyritic rocks at Zimapan. It is generally of translucent hyacinth-red or topaz color, and sends forth gleams of fiery carmine-red, with more or less intense yellow and green reflections. When these opals are still in the compact red porphyry, they form objects of remarkable beauty, the flashes of red, green, yellow and blue color intermingling as the light falls on them. A beautiful opal from this locality, exhibited by the Mexican Commission at the Centennial Expo- sition at Philadelphia in 1876, was very greatly admired by visitors. Later, it went into the Leidy collection ; then into the Lynde collection ; and it is now in the Tiffany collection, Field Columbian Museum, Chicago.

An opal from Zimapan was analyzed by Klaproth, with the following results :

Silica, 92.00

Peroxide of iron, 0.25

Water, 7.75

Total, 100.00

The most extensive opal-mining, however, is in the State of Queretaro, where large quantities are produced and cut an- nually. The process of cutting is primitive and slow; but many opals are cut in a day upon common grindstones and polished upon wooden wheels, the stones being very soft. They vary

aiMS A]<fD PKECIOUS STONES OE MEXICO.

greatly in quality, and values range from 1 cent to $100 (Mexi- can) per specimen; $200, $500, and even $1000 has been paid for the finest found. The ordinary grades are very cheap, owing to the fact that they are either penetrated with cracks, or are liable to lose their color ; nor are the stones of fine quality free from the risk of cracking, or of losing their play of color, especially after the lapse of time. But this subject will be considered more fully below.

In 1890, the writer visited the opal-mines of Esperanza, ten leagues northwest of San Juan del Bio, in Queretaro. They are very extensive, having been traced over a district thirty leagues long and twenty leagues wide. They were discovered in 1855, by a farm-laborer, on the landed estates on which they are situ- ated; but it was 1870 before a settlement was made on the edge of the mountain Ceja de Leon, by Josb Maria Siurob, near the present mine of Santa Maria Iris.’ In 1873, Dr. Mariano de la Barcena made a special report on this opal-dis- trict, in which he states that he has discovered ten veins, or

mines. He says :

‘‘The opals of Esperanza are found forming chains more or less regular, on the banks of porphyry in quartz, which forms its base, or disseminated through the mass of the same rock. Veins (.e., dikes) of porphyry are met with in reg- ular banks, which in many cases preserve the same direction as on the hill of Ceja de Leon, southeast to northwest. The porphyry is a grayish-red color, . , . changing to reddish-white on the surface where it is altered. The aspect of the porphyry indicates generally the kind of opal it contains. Where the rock is brick-red in color, hard and compact, the varieties with a fiery-red color abound, also the tints combined with red, formed from different changeable colors, or rather a mixture of colors. Where the porphyry is paler and mottled, noble opals are found more abundantly, notably in the mines situated on the hill of Peineta.”

These mines are remarkable for the richness and variety of their product. In a single piece of rock from the Simpatica mine, Dr. Barcena found four kinds — noble opal, fire-opal, har- lequin and leehosos. Clear opals, with little fire, are abundant and cheap. The Jurado, the author found, had been exca- vated for some hundreds of feet in length and 100 ft. in width to 150 ft. in depth, at which level the porphyritic rock abounds in common opal and opal silica. The noble opals at Esperanza are remarkable for the extent and intensity of their reflections. The harlequin opals are noted for the diversity and the small

Gems And Precious Stones Of Mexico.

size of tlieir colored spots, wliich resemble beautiful miniature mosaics. One of the most pleasing varieties lias a play of red fire, like those from Zimapan, mingled with flashes of brilliant metallic emerald green, and occasionally a violet-blue of re- markable, intensity. One of the red varieties from the Eosario mine, on the hill of Jurado, has a violet-blue reflection of pecu- liar beauty, and the same mine has produced a variety with a metallic emerald-green and a dark ultramarine color combined, or rather showing one after the other. The lecfmos opals, as those with the red and green reflections are called in Mexico, are very common on the hill of Peineta, and less plentiful in the other mines of Queretaro. Other localities reported in the same State occur on the Batan, Gallindo and Lallare properties, in the district of Amealo. Those in the State of Guerrero have already been referred to. In San Luis Potosi,' both common and fire-opal have been observed on the ridge of Mount Mez- quitic, and at one or two other points.

Most of the cutting is done in the city of Queretaro, some 75 miles from the Esperanza mines. The miners receive an average of twenty-three cents per day for their labor. Thou- sands of opals are sold every year to visitors and tourists in the cities of Mexico and Queretaro, and at railroad stations in Mexico, IS’ew Mexico, Arizona and Texas, while many thou- sands of the poorer grade of handsom'e stones are exported to Germany, to be mounted in cheap jewelry. The poor stones often sell at from to $10 a hundred.* Fine stones, rarely o-r never sold or even shown to tourists, sell for $10, $50, $100, or $500; and even $1000 has been paid for a single stone, hfotwithstanding the great beauty of the Mexican stones, they suffer under two disadvantages. Much of the noble .variety occurs only in thin layers, between or upon bands of common opal with little or no fire. Often half or two-thirds of a cavity containing this variety is filled with these layers or bands,, like those in an agate, sometimes no thicker than a

It is a frequent practice of dealers to keep poor opals immersed in oil and water for long periods, and to take them out only when a buyer presents himself. The temporary brilliancy and play of color, thus imparted, disappears with the evaporation of the absorbed moisture. Very poor opals are often soaked in oil, and then oil is burned on them. This causes them to crack and to absorb the burnt oil — the result being ‘ black ” opals, which possess enhanced brilliancy, but little strength or durability.

Vol. Xxxii. — 5

66 CtSMs Am PEiscious stones of Mexico,

slieet of paper. Frequently the upper layer consists of hyalite, a colorless, jelly-like form, showing no play of color; or there is a brilliant hut very thin layer of opal, not thick enough to he polished. These cavities often contain, also, circular crystals of rutile, which penetrate the opal; and this is possibly the coloring-matter of the yellow and red varieties.

The other disadvantage is the one already briefly mentioned, namely, a liability, real or supposed, to lose color, in a longer or shorter time, under conditions that are not well understood. In this respect the Mexican noble opals are inferior to those of Hungary and of Australia, which do not appear to have this defect. Although the reports are perhaps exaggerated, there is no doubt that such a loss does occur at times. It is specially noted in the colorless fire-opal variety (which seems to be as sensitive as it is gorgeous), and in the flame-opal; and it is fre- quent in the poorer and cracked varieties, which, for this reason, are sold very cheap. The report prepared by the Mexican Commission at the Paris Exposition of 1900 says that in 1891, at some localities not specified, in the States of Michoacan, Guerrero and Queretaro, opals of unusual hardness and notably free from this tendency were discovered. Such a discovery, if confirmed by further development, will have much interest, from both the scientific and the practical standpoint.

The whole subject of* this loss of color, etc., long so perplex- ing, and of so much importance in connection with these beau- tiful gems, has resolved itself into the fact that opals contain- ing from 5 to 10 per cent, of water (supersaturated silica, as it were) have gradually dried out and cracked. These were nearly always colorless, with large flames. In other varieties, containing 5 per cent, or less of water, this defect has rarely been manifested. The change sometimes occurs without ap- parent cause, and has been attributed to variations of the weather in temperature and moisture. But stones have been known to lose their brilliancy even when apparently removed from the influence of atmospheric changes, as when wrapped in paper and placed in a jeweler’s safe or in a collector’s cabinet

Some years ago our late President and fellow-member. Prof. Egleston, the founder of the Columbia School of Mines, and recognized as an expert collector and judge of minerals and

Ge.Ms Anb Precious Stoaes Op Mexico.

gems, possessed a small glass bottle, filled with cut opals of ex- treme beauty. He said that they had been given to him by a prominent jewelry firm in Hew York as entirely worthless, hav- ing completely lost their color ; that he took them as specimens simply, and placed them in his cabinet, where, after awhile, they had recovered all their former brilliancy and fire. The only explanation that he could suggest was that the basement- room in wdiich his cabinet stood might have been somewhat more damp than the store from which the opals had been brought. It is certain, however, that the room was not so damp as to render it unpleasant or unsafe ; and the change as to moisture must have been but slight. It would be interesting to know what was the subsequent behavior of the same stones ; but on this point we have no information. Keeping opals in oil prevents their cracking by preventing their drying.

Probably the widespread superstition which once prevailed, but has now almost, if not entirely, disappeared, as to the opal being an unlucky ’’ stone, may have originated from circum- stances of this kind.

On the other hand, many opals are as enduring as could be desired. Perhaps the most celebrated Mexican opal is the one sold some years ago in the collection of the late Philip Henry Hope, now in the Tiffany collection, Higinbotham Hall, Field Columbian Museum, Chicago. It is a fire-opal, or sun-opal,’ carved with the head of the Mexican sun-god, and is believed to have been taken from a temple. It has been known since the sixteenth century, and brought £262 sterling at the sale of the Hope jewels in London in 1886.* A remarkable fire-opal, brought from Mexico by Alexander von Humboldt, is pre- served in the Mineralogical Museum at Berlin. In these nota- ble instances, as in countless others, there seems to have been no deterioration.

The Spanish historians, in their marvelous' tales of the won- ders seen in Mexico at the time of the Conquest, describe the image of the mystic deity, Quetzalcoatl — god of the air — on the great pyramid of Cholula, as wearing a mitre ’’ or head-dress waving with plumes of fire. This effect is supposed to have been produced by masses of mosaics of fire-opal. The concep-

Catalogue, Hope Collection, pi. xxxi., Fig. 3, p. 3. London, 1839.

Gems And Peecious Stones Oe Mexico.

tioii is splendid, and as characteristic of Aztec art as the mar- relous golden image of the snn, encrusted with “ emeralds ” (evidently green jadeite), facing and refleeting the morning rays on the wall of the temple of the sun at Cuzco, was character- istic of the Inca art of Peru.

Beautiful exhibits of Mexican opals have been made at the recent World’s Fairs, from the time of the Centennial down to the present. At the Paris Exposition of 1889, the fire-opals and noble opals shown by the Mexican Commission — particu- larly one large specimen with superb pink flame — attracted much attention. One very remarkable specimen from the Iris mine, Queretaro, has been described by the writer. It was a nodular mass, as large as a hen’s egg, of fire-opal, in trachyte, and was penetrated by yellow, polished and iridescent acicular crystals. It is not certain what these were, but they were apparently rutile. The specimen is in the Harvard University collection.

Some of the mixed varieties of Mexican opal, although not suitable for cutting into gems, have fine possibilities as orna- mental materials of great elegance. Such is a beautiful variety of opal-agate, found in the State of Jalisco, in which pink, yellow and green, especially of the softer shades, occur together, blended and veined in the most pleasing manner. It exists in considerable quantity, and is valued as a decorative stone for metal-work or jewelry.

Chalchihuitl was the name, celebrated in Mexican archseology, applied to certain green stones, capable of high polish, which were carved into various ornamental forms, and very highly valued. There has been much mystery and much discus- sion as to what this precious material really was, and whence it was obtained. It seems evident that several minerals were included under this name — among them a green quartz or prase, some of the deeper green varieties of tecalo or Mexican onyx (so-called), and probably turquoise; but the precious chalchi- huiil has now been proved to be jadeite, a stone which has pos- sessed a singular charm for many aboriginal peoples in widely separated parts of the globe, but which, for some reason, has not so much attracted the notice or the taste of the “ historic races.”

When attention began to be drawn, some thirty years ago, to the turquoise mines near Santa Fe, Hew Mexico, the eminent

Gems Axd Precious Ston-Rs Of Mexico.

geologist and explorer, Prof. ‘William P. Blake, noting the evi- dences of ancient workings at those mines, and the traditions still preserved among the native tribes of the region as to the sacredness of the stone and its association with Montezuma, felt assured that here was the solution of the chalchihuitl mys- tery. The stone must be no other than turquoise ; and here were the evidences of its long-lost source. At first sight this view was highly satisfactory, and it was widely accepted; but later investigation has not confirmed it, except in part. Two objections are conclusive : (1) that turquoise never occurs in masses of sufiicient size to make objects like many of the chalchi/ndtis ; (2) that the ancient Mexican tribute-rolls distinctly show that chalchihuitl was a product of southern Mexico — the region between the capital and Central America. To set at rest all questioning, moreover, chemical analysis proves that the real chalchihidil is not turquoise, but jade.

Under the name jade, however, are included two minerals, nephrite and jadeite, closely similar in appearance and proper- ties, which were separated by Damour in 1865. Jadeite is a silicate of alumina and soda, classed in the pyroxene group by mineralogists, while nephrite is a variety of amphibole or hornblende, a silicate of alumina, lime and magnesia.

In Mexico and Central America jadeite only is found, not nephrite, while among the jades of the northwest coast of America and Siberia, in Hew Zealand and Oeeanica, jadeite has not yet been recognized. The Mexican jadeite has been treated of by Damour;* and a number of specimens in the United States National Museum have been described by Clarke and Merrill in their article On Nephrite and J adeite.’t These specimens vary widely in color, from light to dark and from dull to bright greens (some plain and some mottled), and from translucent to opaque, but agree closely in their specific gravi- ties, which were carefully taken by Dr. William Hallock, and are all above 3. Those that were analyzed gave very nearly the regular composition of jadeite, a silicate of alumina and soda.

The Central America series of jades in the same collection are mostly from Costa Rica, with some from Guatemala and

BvU. SociM Mineralogique, iv., 157.

t Proc. U. S. Nat Muamm, xL, 1888, pp. 121-125.

Gems Anb Precious Stones Oe Mexico.

Nicaragua. They also are principally true jadeite, with den- sity above 3 ; though some appear to be green quartz (resem- bling prase), and others, of much less hardness and density, are indeterminate minerals of various kinds. No nephrite is recog- nized among them. The same variations in color, etc., appear in these as in the Mexican jadeites.

In thin sections under the microscope the jadeites present a distinctly crystalline, or granular-crystalline, texture, in which sometimes the cleavages, and even the crystal-angles, can be recognized : from these the pyroxene character of the mineral is definitely traceable. The nephrite jades, on the other hand, show a minutely fibrous, scaly and lamellar structure vfhen magnified. There are, however, intervening types; and the structure alone may not in every instance be relied upon to distinguish the two species.

Nephrite is in some cases a secondary mineral, arising from the alteration of pyroxenes into hornblendes (the change called uralitization) ; and hence, as Clarke and Merrill suggest,* it may be well said that a “true nephrite may grade into a granular diopside rock resembling jadeite,” accordiiig as the change has advanced more or less. But the density of nephrite is always below 3, and that of jadeite always above 3.

The name jade is from the Spanish de Mojada, or “ stone

of the loins ” ; it is first mentioned under this name in the writings of Monardas in 1565, and had been brought from Mexico and Peru with this designation, arising from its sup- posed efficacy in diseases of the loins and kidneys. This idea entered into all the nomenclature of these allied stones ; the Spanish term was used in its Latin form, lapis nephritieus, by Clutius in 1627; Linnaeus called it talcum, nephritieum in 1768 ; and Werner gave it the mineralogical form nephrit in 1780. The Germans named it Merenstein a,n(i Bdlstein ; the Prench, pierre nepb'itique, with other familiar variations.

It is evident that the ehalcMhuiil stone was highly prized among the natives in various ways. Besides its reputation for curative or preventive power against certain forms of disease, it was valued for its beauty of color in the finer varieties, and was carved into objects of ornament. It seems also to have

Loc. city p. 129.

Gems Axb Pkecious Stones Of Mexico.

possessed some kind of mystic saeredness, religious or ancestral, like that attached to turquoise by the traditions of Montezuma and the ancient turquoise mines, which still linger among the native tribes of i 7 ew Mexico and Arizona. How far these ideas were blended, or what connection existed between them, it is impossible to determine. The curative powers may have been ascribed to some deity to whom the stone was sacred, and the wearing of beads or of carved amulets may have been partly religious and partly sanitary in motive, while finer specimens and rarer varieties may have been reserved as the special pre- rogative of royal or sacerdotal chieftains, and worn as insignia of exalted rank.

When we consider how superstitious were the Europeans of the 16 th and 17 th centuries, it seems also possible the voyagers, adventurers and sailors who brought home the jadeite as loot, originated its supposed virtues in their fertile brains, to enhance its value for gift or for sale, even though the natives never at- tached such properties to the mineral.

Many specimens of carved jades were brought over early to Spain ; but it is probable that the most remarkable were lost. Wonderful tales were told of the carved articles of emerald’’ belonging to Montezuma, including a goblet and a rose,” which were shipped by Cortez to the King of Spain, among the choicest treasures of the conquest. Unfortunately the ves- sel that bore them foundered at sea, and these unique works were forever lost. It is impossible that they can really have been of emerald, as that gem scarcely occurs in Mexico at all. They were probably chalchihuitls of peculiar richness of color, and constituting, doubtless, both in material and in workman- ship, the finest products of Aztec art.

The most remarkable specimens now known of jadeite from Mexico are chiefly carved masks or pendants or celts or adzes, these latter also being often carved and elaborately ornamented, showing that they were insignia of rank, and. not implements for use. Many of them retain on the back or sides portions of original rounded surfaces, proving that they were made from boulders. In several instances, large pieces have been reduced by cutting out smaller portions from the back, leaving the carved face uninjured — thus indicating either increasing scar- city of high-priced material, which induced the removal of su-

Gems Precious Stones Oe Mexico.

perfluous portions to make new objects, or perhaps some pecu- liar tradition or superstition, attributing special sacredness to pieces once belonging to some deceased chieftain, which might be perpetuated to his successors hy bestowing on them parts thereof, while the main original was buried with its possessor.

The Kunz ” jadeite adze in the American Museum of Nat- ural History, York City, which has been described by the writer, is believed to be the largest known. On its face is carved a grotesque human figure ; and, for so hard a material, the workmanship is excellent. It is said to have been found about 1869, in Oaxaca. It measures 272 mm, (10.13 in.) in length, 153 mm. (6 in.) in wudth, and 118 mm. (4.63 in.) in thickness, and weighs 229.3 Troy ounces. Across the ears it is 158 mm. (6 in.): across the lower axe-end, 82 mm. (3.25 in.); the height of the head down to the neck is 158 mm. (6.25 in.); the height from chin to foot, 115 mm. (4.5 in.), and the length of the legs 50 mm. (2 in.). Erom the back a piece about 160 mm. (6.5 in.) long and 50 mm. (2 in.) wide has been removed.

The color is light grayish green with a tinge of blue, and streaks of almost emerald-green on the back. In style of or- namentation it very closely resembles a gigantic adze of granite, 57 eentim. long and 34 wide, mentioned by A. Chavero ; and it has almost a counterpart in a green aventurine quartz ade, now forming part of the Christy collection at the British Museum, and formerly in the possession of Percy Doyle, Esq., of the British diplomatic service. It differs from these two objects, however, in having no ornamentation on the forehead, and in having four dull markings on each ear, one under each eye, and one near each hand, which seemingly could have served no other purpose than to hold thin plates or films of gold, which the polished surfaces would not do. If this was so, no trace of the gold can now be seen. From all appear- ances, this adze was shaped from a boulder, since weathered surfaces, such appear on all sides of it, would be found only on an exposed fragment. The dull markings show a tiger’s or serpent’s head on the brightly polished human face. The lapidarian work on this piece is probably equal to anything that has been found, and the polish is as fine as that of modern times.

A feature of great interest is the removal from the back of

Gems And Precious Sto:S"Es Of Mexico.

two portions, which must have weighed fully 2 lbs. Why was this done ? Similar removals and divisions have been men- tioned in other cases. In a paper read April 27, 1881, before the American Antiquarian Society, Philip J. J. Valentini de- scribed two carved jadeites which showed similar treatment. One was the Humboldt celt, a votive adze presented to Hum- boldt by Del Eio in 1803, and the other the so-called Leyden plate, which was found by S. A. von Braam near San Felipe, in Honduras, near the borders of Guatemala, and given by him to the Leyden museum. These objects are 9 in. long and 3.25 broad; the former being 1.4 in. and the latter 0.6 in. thick. (The fact that the two, if placed together, face to face, corres- pond exactly in outline, makes it highly probable that they were originally part of one and the same celt; and it is quite possible that the remaining parts may yet be found.) In 1886 Professor Frederick W. Putnam exhibited before the same so- ciety a remarkable series of Mcaraguan and Costa Pican jade- ites, which were all ornaments, and showed that they had been made by cutting celts, which had been perforated by one or two drilled holes, into halves, thirds and quarters. In one in- stance two of them fitted together. The explanation suggested was that, the supply of the material having become exhausted, recourse was had to division, or the removal of a part from ex- isting articles for the purpose of making others, perhaps to be buried with some dead chief, or to be bestowed as sacred treas- ures on new branches of the tribe.

Fully one-eighth has been thus removed from the back of this adze; and the manner in which the instrument used in its re- moval was held has produced a rounded cut on each side, lend- ing probability to the supposition that some abrasive was em- ployed, drawn with a string held in the hands, or stretched across a bow. If the Aztecs knew of the existence of corun- dum, we can better understand how they worked so large a mass of tough and hard material. But corundum is hardly known in Mexico ; and it may be remembered that the Hew Zealand Maoris cut and carved their jade articles by means of thin slabs of hard, gritty, fine-grained sandstone.

So far as the writer has been able to learn, no similar object of equal magnitude and archaeological interest exists. The next most important specimen is a large jadeite celt, described

Gems And Precious Stones Of Mexico.

by Dr. A. B. Meyer as belonging to the Royal Ethnological Museum at Dresden. This, however, weighs only 7 lbs., and is wholly devoid of ornamentation. Ror will the Humboldt celt or the Leyden plate, above referred to, compare with it at all.

Various other jadeite articles of similar character have been exhibited and described, but many of them, like some of those already referred to, belong rather to Central America than to Mexico, or else are of uncertain locality. Among the latter is a curious little mask, apparently representing the face of a crying child, exhibited in 1879 before the American Associa- tion for the Advancement of Science by the late Mrs. Erminnie A. Smith,* noted for her studies in American ethnology.

The late Mr. George Squier, the eminent archaeologist, pos- sessed a number of finely carved chalehihidtlsf wLich he de- scribed and figured. Several of these were very brilliant in color, and might have been regarded by unskilled persons as carved, like the reputed treasures of Montezuma already men- tioned, from opaque emerald. To a considerable extent, more- over, they bore Maya, rather than Aztec, symbols.

It seems that the veneration of chalchihuitls extended through all Mexico, and Central America as well. The question, whence the material was obtained, is of great interest to archaeologists ; and its solution might bring into notice a beautiful ornamental stone for modern uses. As already remarked, jade has been prized and elaborately worked by many serni-civilized peoples, but never, until recent times, employed by the historic races. Yet its fine texture, its hardness, and the beautiful polish ’which it takes and retains, combined with its rich and delicate tints, and its translucency, render it a material of great possibilities. Only within a few years has the first attempt been made to utilize jade as a ‘'civilized’’ ornamental stone. This was done at the Paris Expositions of 1878, 1889 and 1900, in the remark- able exhibit of Siberian nephrite made by the noted Russian explorer, M. Alibert-t The display was one of extreme beauty

Proc. Am. Assoc. Adv. Science, 1879, vol. xxviii., p. 523. t Now in the Squier collection, at the American Museum 'of Natural History, New York city.

t The writer saw at the Imperial Lapidary Works, at Peterhoff, Russia, a can- opy of jade (nephrite) 15 ft. high, that was being made for Alexander HI.

Gems Precious Stones Op Mexico.

and interest, and showed that this stone was ahnndaiitlj capable, at the hands of European artists, of yielding the finest results, equalling or surpassing the long-celebrated Chinese work. If the locality of the rich green chalchihuitls of Mexico and Cen- tral America could be found, and the material could be obtained in any useful quantity, it would be a beautiful addition to our ornamental stones, as well as an interesting discovery from the standpoint of science.

It is to be hoped that before many years this problem may be solved. Much of the carved Mexican material was evidently obtained from boulders and rolled pieces, carried down by streams from unknown localities in the mountains. But, in some instances, it seems that the ancient Mexicans must have known the mineral in place.

The whole situation is curiously parallel to that of the oce- anic jade’’ of hTew Zealand, where that substance, so much prized and venerated, was derived almost entirely from boulders in certain streams, and the actual places of occurrence were unknown, save perhaps as a secret to a very few.

A valuable and important paper has been published during the past year by the well-known archaeologist, Mrs. Zelia ISTut- tall, embodying the results of an extended investigation as to the probable sources of the jadeite, which appears so promi- nently in early Mexican documents. The chronicle of Tezo- zomoc relates the conquest of the southern tribes of Mexico by Ahuitzotl in 1497, and the terms granted by him to them, which comprised various forms of tribute — gold, skins, plumage and precious stones — first among which was named clialcUhuitl of all varieties. Twenty-two years later, at the time of the Spanish invasion, the tribute-roll of Montezuma gave full lists of towns from which chalcMhuitl was sent to the capital. A copy of this celebrated tribute-roll, sent by Cortez to Charles V., shows that a large number of places in the region of Ahuit- zotl’s victories, in southwestern Mexico, had continued this tribute down to Montezuma’s time, as had been done also by a number of other localities, not so near to the region named.

Mrs. ISTuttall undertook, by a close examination of these ancient lists of towns, to identify them, as far as possible, with existing localities. The lapse of four centuries, and the replace- ment of native by Spanish names, might seem to render this

Gems And Peecious Stones Of Mexico.

attempt well-nigli hopeless. But it is surprising how large a proportion of them are clearly recognizable — sometimes modi- fied, but often almost unchanged. Others, not yet identified, may possibly be traced hereafter by more minute local investi- gation. Mrs. hfuttall has employed the best and latest maps, and has carefully excluded all identifications that were at all doubtful.

On grouping these localities and studying their relation, they arranged themselves in an interesting manner. They all belong to a region extending from the Isthmus of Tehuantepec, the scene of Ahuitzotl’s victories, southeastward through the State of Chiapas to the Pacific Ocean and the border of Guate- mala, and northwestward through the four States of Vera Cruz, Puebla, Oaxaca and Guerrero — the last three represent- ing the native province of Mixtecapan.

Tables of the ancient and modern names are given by dis- tricts, accompanied by maps on w-hich the identified points are marked. These very interesting maps show that the precious mineral was obtained at numerous places throughout a wide region. For the determination of actual sources, however, with a view to their rediscovery, the facts elicited are perplex- ing, from their very abundance. But there are some special indications that may well be followed up.

In Chiapas, 9 towns appear in Montezuma’s roll. Six of these are clearly identified, lying near the Pacific coast in the angle between it and the Guatemala line. A town inland, considerably northward of this group, and not named in the tribute-roll, bears to this day the name of Chalchihuitlan — the Gand of chalcMhuitV This region was not subdued by Ahuit- zoths conquest of Tehuantepec, and required a second expedi- tion to reduce it; but it finally became tributary on the same terms as the others. Here is apparently one district where the mineral could be found by sufficient search.

In the State of Oaxaca, or on the adjacent border of Vera Cruz, fifteen points are identified out of twenty-two in Monte- zuma’s list. Six are identified in points in Vera Cruz; with 6 others uncertain, but evidently not far distant. Several of these are near the Gulf coast and north of the latitude of Mexico City. Proceeding thence inland, the map of the State of Pueblo shows no less than 23 places identified. Two or three are in the north-

Gems And Precious Stones Of Mexico.

ern and southern portions of the State respectively, but most of them are grouped along the central zone lying between Orizaba on the east and Popocatepetl on the west, though tending rather southward of the latter, and passing over into the State of Guer- rero, where 6 towns are grouped in the northeastern portion. The center of this group of localities would lie on a meridian line passing through the City of Mexico, about half-way be- tween that city and the Pacific. This would appear to be an- other well-defined region where chalchihuitl must have occurred in place.

The Guerrero localities are inland. IsTone are noted in the coast-region. There are two quite near the coast in Oaxaca, west of the Bay of Tehuantepec; and the coast-group in Chiapas, already mentioned, lies southeast of that bay, suggest- ing a line of occurrences along the Pacific, interrupted by the depression of the bay.

Mrs. Nuttall gives, in conclusion, a farther list of those names of places in Mexico which apparently involve or include the word ehalchihuUL "While these are suggestive and interesting, they may not all be important; but the name Sierra de Chalchi- huites given to a small range of mountains in the State of Zac- atecas, near Sombrerete, and that of a mining town called Chalehihidtes, at the northern end of the same range, certainly offer striking intimations.

This investigation is highly creditable to Mrs. bTuttall, and wall undoubtedly stimulate and direct the search for jadeite, which evidently must occur at numerous points in Mexico, anciently familiar, but long forgotten and lost. Full geological investigation of the nature and distribution of the abundant crystalline rocks is the great desideratum for an intelligent further pursuit of this interesting inquiry.

A point not alluded to by Mrs. ITuttall, yet nevertheless of much significance, is the kind of material called for as tribute from four different sections : i.e.y whether “ beads, that is, peb- bles and rolled pieces, or larger single pieces, are specified. This point was noted twelve years ago by that eminent archse- ologist, the late Dr. D. G. Brinton, in discussing the tribute- roll in the Codex Mendoza, published in Lord Kingsborough’s Antiquities of Mexico’ (London, 1830). Examination showed that alPthe lists given in Mrs. I7uttall’s paper called

78 Gems And Precious Stones Of Mexico.

for strings of chaleMhuUl heads (one to five every six months), except ill one section, where three large pieces ” were also required. The map shows that half or more of the identified localities in this section were grouped along the border of Oaxaca and Vera Cruz, about equally distributed on either side. Here is a well-defined region, southeast of the City of Mexico, and not far from Vera Cruz, in which the mineral must certainly exist in place. Other localities, from which only beads ” were called for, were plainly along water- courses, where rolled pieces alone were found. In these cases the material may yet be traced up-stream to the sources whence it was brought down by natural agencies ; but these places were evidently unknown to the natives, then as now.

The region along the Oaxaca-Vera Cruz border, on the other hand, yielded larger pieces, doubtless from an actual oc- currence in place.

It is interesting to observe how closely the studies of Mrs. Nuttall, read with this clue, support the suggestions of Dr. Brinton as to the most promising region for search. The Codex Ifendoza calls for pieces, three every year, in addition to beads, usually from Tototepec, Chinantlan, and some other towns in Oaxaca, principally in the department of Vilalta, a region described as wild and mountainous, inhabited by the Mixe In- dians and the Chinantecas.* Dr. Brinton suggested that this district of Vilalta was the most promising in which to seek for jadeite in large pieces, or perhaps actually in place.

It may be added here that there is in the writer’s possession a rough piece of Mexican jadeite, fractured and sawed, not rolled, although it may have been broken from a boulder.

From the abundance of Central American specimens, it is apparent also that other chalchihuitl localities must exist, proba- bly all the way south to Costa Rica.

Some eminent students of archaeology have been inclined to believe that the jadeite objects found in the Hew World were not indigenous, but had been brought from Asia, where jade has been known, valued and wrought, from very ancient times. On this theory, supported by the supposed similarity between the Mayas and the ancient Burmese, the articles became evi-

Science vol. xiL, p. 168, Oct., 1888.

Gems And Peecioes Stones Oe Mexico.

denees of the Asiatic origin of the American peoples, or at least of trans-Pacific communication and commerce. The chief exponent of this theory was the late Dr, Heinrich Fischer of Freiburg, Baden, who devoted years to the study of the sub- ject.* The grounds for it, however, were slight; the main one being the fact that jade had long been familiar in eastern Asia, and had not been previously known in America. Stress was laid on the removal of portions of large objects to make smaller ones, as though the precious material was very limited in amount, and becoming exhausted; but it is not certain that this was the real reason for this practice. As noted above, it may have been entirely different, and connected with some re- ligious or ancestral tradition. Another argument was that the green jadeite of Burma, if heated, f assumes a brownish cast, such as appears in some American examples, presumably also from heating. But this is merely a presumption; and the fact that the green color of many silicates is due to protoxide of iron, which is altered to sesquioxide by heat, and then becomes brown, are enough to dispose of this scanty foundation for so important a theory.

In the same way the nephrite jade of Alaska was at first at- tributed to Siberian sources ; but some years ago it was defi- nitely determined to be of American origin.

On the other hand, Dr. A. B. Meyer, Director of the Eth- nological Museum at Dresden, and other foreign students of the subject, opposed the views of Fischer, and argued from various premivses for the indigenous character of the American jadeite.

More recently, the whole subject has been very thoroughly reviewed by Professors F. W. Clarke and George P. Merrill, of the United States National Museum. J The great collection of that museum contains a fine series of jadeite objects from Mexico, mostly from the State of Oaxaca, together with a num- ber from Central America, the choicest of which are from Costa Hica. In summing up their conclusions, these writers find that the articles probably came from a number of locali-

Muhlenpfordt, Schilderung der Repuhlik M&x/ico Yol. ii., p. 213. t In Burma, jadeite is mined by “fire-setting;” and in New Mexico tur- quoise was mined in the same way.

t “On Nephrite and Jadeite,” Proc. U, S, Nat, Museum vol. xl. (1888), p. 115.

.Oems And Precious Stones Of Mexico.

ties, and are of no value whatever in tracing the migrations or the intercourse of races; that these minerals are not uncom- mon in metamorphic rocks, and hence are liable to occur wherever such rocks abound; so that their presence has no more significance as to tribal movements or aboriginal trade than pieces of graphite would have. The natives required and valued a hard, tough mineral, capable of receiving and retain- ing a sharp edge for adzes or celts, or a high polish for orna- ments ; and they utilized it wherever it was found.

As to the various stones included under the name of elial- chihuitl the following points may be noted in concluding this discussion :

The identity of jade with chalchihuitl was first suggested in 1866 by Prof. Raphael Pumpelly, in his Geological Researches in China.”' In 1883, as already noted, Prof. William P. Blaket had identified chalchihuitl with the ISTew Mexican tur- quoise, and proposed the mineralogical name chalchihuitl for the bluish-green variety. Certain it is, however, that although turquoise was doubtless included under chalchihuitl and, per- haps, was regarded as a specially choice variety, it formed but a part of the material so designated by the Aztecs. The tur- quoise is never found in pieces of large size ; it was used in the form of small beads, usually cylindrical, and for inlaying and encrusting various ornaments. In some cases skulls J are thus overlaid with a sort of mosaic pavement of turquoise. Such specimens may be seen in the British and Vatican mu- seums in Europe, as well as masks and small animal figures. The early Spanish writers of the time of the Conquest refer frequently to turquoise, and identify it with chalchihuitl as a ma- terial greatly valued by the natives. Some of the presents made of this material, and sent by Montezuma, through Cortez, to the Emperor Charles V., are believed to be now among the crown-jewels of Spain. Coronado, in 1540 and 1541, and Eriar Marco de Hica, who traveled through Hew Mexico in 1539, made frequent references to turquoise. It is said that the insurrection of the natives which led to the driving out of the Spaniards in 1556 was caused by their resistance to forced labor in the turquoise-mines.

Smithsonian Contributions, xv., 118.

t Am. Jour. Sd., 24 ser., xxv., 227, 1858 ; 3d aer., xxv., 197, 1883. t Am. Jour. Sd.j 2d ser., xxv., 227, 1858 j x3d aer., xv., 197, 1883.

Gems Anb Precious Stones Of Mexico,

The fact seems to be that the chalchihuiil so highly prized was jadeite in southern Mexico and Central America, and turquoise in northern Mexico and Ifew Mexico. Each species is a green mineral, and was greatly valued, and made a matter of tribute to the crown ; but the jadeite, as we have seen, is confined to the region south of the capital, while the turquoise is unknown there, but occurs at a number of localities in the territory acquired by the United States after the Mexican war. Not only the mines at Los Cerrillos, near Santa Fe, but every other locality discovered (and there are now a number y, bear conspicuous traces of long and laborious working, in ancient times, by the crude methods of stone tools and fire, which the writer observed at Los Cerrillos.* It is thus abundantly proved that the turquoise was highly valued and largely used.

On the other hand, the evidence that the ehalchihuitl of southern Mexico was jadeite has already been sufficiently dwelt upon. Nowhere, indeed, this mineral regularly mined, like the turquoise of the northern region. Most of the material produced consisted of rolled boulders ; and although, as we have seen, the exceptional requirement, for tribute, of pieces, in distinction from beads (lA., pebbles and boulders), points to a district on the border of Oaxaca and Vera Cruz, where it must probably have been found in place, the actual localities of such occurrence were generally unknown.

Other minerals, similarly used and designated, were : a green quartz, or prase ; a variety of lamellar serpentine ; some of the richer colored kinds of teeali or Mexican onyx; and oc- casional undetermined materials of greenish color. It does not appear that the ancient Mexicans knew either malachite or chrysocolla, which would have made chalchihuitls of surpassing elegance. Had they discovered these beautiful minerals in copper-mines like the Globe and Copper Queen of Arizona, which have yielded such magnificent specimens, they would have prized them above anything that they possessed, and would have carved them into objects of regal treasure.

Friar Bernardino de Sahagun, in his Hisioria de Neva Uspana (lib. ii., chap. 8), says that chalchihuiil was a general term for choice green stones in one of the nahuail (Mexican) languages.

See Oems and Precious Stones of North America pp. 63-66.

Vol. Xxxii. — 6

Gems And Pbeciods Stones Oe Mexico.

Any sneli mineral, somewhat translucent, and capable of tak- ing a high polish, was highly esteemed. He gives the follow- ing varieties, distinguished by descriptive adjectives, in the native speech :

Iziac chalchihidtl (white ehalcMIiidtC), of a fine green, quite translucent, without stripes or stains.

Quetzal ehalchihuitl (precious chalchihuitl) ; white, with much transparency, and a slight greenish tinge, somewhat like jasper.

Tlilavotie, literally “ of a blackish watery color ” ; with min- gled shades of green and black, partially transparent.

literally “ Toltec knife” or “ Toltec obsidian ” ; of a clear, translucent green, and very beautiful.

It is evident that the first is the so-called Mexican onyx, or Tecali marble, which exists in Tecali in veins, and is in reality an aragonite stalagmite. Great quantities of it were made into figures, ornaments, and beads, which are found all the way from northern Mexico down to Oaxaca. This so-called onyx is extensively quarried to this day, forming one of the richest ornamental stones (see Mexican Onyx, above).

Various green stones known at present were used in consid- erable abundance in ancient Mexico. Among eight green ob- jects, sent to the writer at one time as jadeite, four were jade- ite ; one was laminated serpentine ; another, a greenish quartz ; and two a mixture of white feldspar and green hornblende. In a string of beads there were four pieces of true jade- ite ; but all the others were, like the jadeite beads, simply rounded pebbles, drilled from both sides; and there were nearly a dozen different substances in this string. The ques- tion is, were such pebbles a part of the tribute mentioned in the Code Mendoza f Similar strings of pale green pebble- beads were exhibited under the name of jadeite in the Blake collection in the Mexican section of the Department of Eth- nology, at the Buffalo Pan-American Exposition of 1901.

This confusion is not surprising. While no nation has used jade more extensively and for a greater period than the Chinese, yet it was only in 1865 that Damour isolated jadeite and nephrite as two forms of jade, and, still later, ehloromelanite from jadeite, as a variety containing more iron and heavier in specific gravity. The Chinese experts and art-lovers are often

Gems And Precious Stones Oe Mexico.

mistaken ; and a variety of green and white tough stones such as light green and dark green prase, bowenite, fibrolite, quartz- ite, and others, have been, and are still, mistaken by them for jade. It was only when exact scientific investigation came into play that the true facts about many supposed valuable pieces were known. But, on the other hand, it is surprising how the Chinese, the Swiss lake-dwellers and the ancient Mexi- cans, recognized correctly the water-worn, iron-stained and ap- parently unrecognizable pebbles as jade or jadeite, whether they were selected for an art object, a celt or tool, or for an or- nament.

Obsidian . — Strictly speaking, obsidian, or volcanic glass, could scarcely be considered as a precious stone ; yet in Mexico it has been used in so many ways, has been so beautifully worked, that to omit it from this paper would be to ignore an ornamental material which figured more largely in ancient Mexican art than even jadeite.

This mineral, frequently found in connection with volcanoes and igneous outflows, is not a distinct species, but a peculiar glassy and non-crystalline form, assumed by several varieties of igneous rocks, rapidly cooled from the molten state. In such conditions, it seems that there has not been time for the process of crystallization to take place, and the result is this glassy modification. The same thing is often seen in furnace- slags.

The name is a nahuatl (aboriginal Mexican) one; and the substance is abundant at various points in Mexico and the west- ern IJnited States — for instance, at the obsidian cliff,’’ a marked feature in the Yellowstone Park, and many localities ill California, Yevada, and the Gila region in Arizona. It was a favorite stone among the Aztecs, and was mined extensively in Mexico for a great many purposes, both useful and orna- mental. It could be “flaked” into knives and many other implements, with sharp cutting edges ; and it could also be brilliantly polished. The knives used by the Aztec priests in their terrible rites of human sacrifice at the pyramids of the Sun and Moon at San Juan Teotihuacan, a short distance from the City of Mexico, were keen-edged obsidian flakes, of which great quantities are found near these pyramids. Similar imple- ments, fragments, and the “cores” that were left when a mass

Gems And Pbecious Stones Of Mexico.

had been flaked down as far as practicable, are abundant throughout Mexico, especially around ancient village-sites, and may be seen in almost any archeeological collection.

Obsidian is generally velvety black, but varies to gray, and sometimes presents reflections of different tints — reddish- greenish, bluish, silvery or golden. It frequently contains multitudes of minute crystals, which yield these various reflec- tions ; and then the mineral may present a double color, black in one direction and golden chatoyant in another, usually at right angles to the black ; giving, when properly cut, a '' cat’s- eye effect, and forming the obsidian cat’s-eye.

It occurs at many Mexican localities, such as Tulanango, in the State of Hidalgo; near the village of Magdalena, in Ja- lisco; at Cadereita Mendez, in Queretaro; at IJeareo,Benjamo; and on the Pateo property, in Michoacan. But the chief lo- cality, noted for its extensive ancient mines, is the Cerro de IS'avajas, or ‘‘Hill of Knives,’’ on the Guajalate estate, near Pachuca, in the State of Hidalgo, northeast from Mexico City. This was the principal source of the material so largely employed for knives, arrow-points, spear-heads, masks, mirrors, and various objects of ornament."

For the first precise description of these mines we are in- debted to Edward B. Tylor,t who visited that interesting spot in 1856, while traveling through Mexico in company with Mr. Christy. Besides many facts relating to the archeology and ethnology of Mexico, this writer furnishes the best observations on Mexican obsidian. Of the mines, he says ;

Some of the trachytic porphyry which forms the substance of the hills had happened to have cooled, under suitable conditions, from the molten state into a sort of slag, or volcanic glass, which is the obsidian in question ; and in places this vitreous lava from one layer having flowed over another which was already cool, became regularly stratified. The mines were mere wells, not very deep, with horizontal workings into the obsidian, where it was very good, and in the thick layers. Bound about were heaps of fragments, hundreds of tons of them ; and it is clear, from the shape of these, that some of the manufacturing was done on the spot. There had been great numbers of pits worked, and it was from these little mines— wmto, as they are called— that we first got an idea how important an element this obsidian was in the old Aztec civilization. In excur- sions made since, we traveled over whole districts in the plains, where fragments of these arrows and knives were to be found literally at every step, mixed with fragments of pottery, and here and there a little clay idol.’’

Humboldt refers to it in his Bsmi FoUtiquti mir le Boyaume de la JSfouvelle-M- pagne, voL ii. (liv. iii. ), p. 1 22.

t Anahuac, or Ifezieo and the Mezicam, Ancient and Modern. London, 1861.

Gems Asb Precious Stones Of Mexico.

This locality fariiished a large part of the obsidian so widely distributed throughout the whole Southwest. In Mexico and Central America implements and fragments abound every- where, indicating extensive traffic ; and at points like Tenoch- titlan (the modern City of Mexico) and Sail Juan Teotihuacaii, the refuse-heaps are black with thousands of pieces.

An interesting account of these great obsidian mines in the State of Hidalgo has been given recently by Prof. W. H. Holmes, of the United States hTational Museum. They are among the most remarkable and important of the prehistoric mines found in various parts of Jlorth America.

“Prof. Holmes, Prof. Gr. K. G-ilbert and Mr. W. W. Blake made the visit together. Leaving the railroad at Pachuca, the hacienda of the Guajalate estate is reached by a ride of 15 or 20 miles, and the mines themselves, several miles beyond, by a forest trail. They lie on the lower slopes of the Sierra de Las Navajas, or Mountain of the Knives. The slope is partly covered with long grass, partly with undergrowth, and partly with open pine woods ; and as tlie actual mines are reached the surface becomes exceedingly irregular and difficult to traverse, owing to the alternation of heaps and ridges of obsidian fragments and the pits and excavations whence they came, half-concealed in the long grass and underbrush.

“Prof. Holmes compares these workings with those at the two great flint quar- ries of North America — at Hot Springs, Ark., and Flint Kidge, Ohio — and esti- mates them as perhaps about equally extensive. They must have been exploited for a long period, as hundreds of acres have been worked over, and the ridges and depressions are practically continuous for 1 or 2 miles in length, and in some places for half a mile in breadth. There is no regularity whatever in their disposition j some are isolated pits, others coalesce and form half-continuous trenches over acres of ground. All are very fresh in appearance, although four centuries have passed since they were abandoned ; but obsidian is a material that does not weather or decompose, and the flakes and fragments are as sharp and clean as if perfectly fresh. The trenches rarely exceed 6 or 8 feet in depth, and the heaps and ridges are but little more in height ; but some of the excavations are like wells or pits, 15 or 20 feet deep, with vertical or overhangiog sides. Prof. Holmes surmises, from the quantity of debris piled in horseshoe-like mounds around them, that these may have led to oblique or horizontal tunnels of some length ; but it was not practicable to explore them for lack of tools.

“The material taken out from the ground must have been carried to certain points at hand ; there tested as to its quality ; and, if this proved good, trimmed into the cores that were taken away and widely distributed as an article of Aztec trade. The points where this testing and trimming were done are marked by immense piles of pure obsidian flakes and rejects, unmixed with any earth, and all perfectly sharp and fresh. The principal one of these heaps Prof. Holmes estimates to contain 20,000 to 30,000 cubic feet. It forms a long slope, with a flat top about 20 by 40 feet in area, where, doubtless, the workmen sat. Vestiges of rude stone buildings were recognized, one near this pile, and others lower on the slope of the hiU ; but all were reduced to low, ruined walls.

Gems And Eeeoious Stones Of Mexico.

“The actual occurrence of the obsidian itself was not seen. There was not visible outcrop, and the pits and trenches were so filled up below with fragments and debris that the material could not be observed in situ. It must occur almost immediately beneath the surface, in irregular beds or masses of considerable extent. Many of the fragments are of large size and quite homogeneous. The color is chiefly black, or nearly so, though some is found of a paler shade — greenish, with cliatoyant reflections. Plammer stones of tough lava, worn and battered by use, were the only tools or implements found. These were of two types, the larger ones discoidal or cheese-shaped, similar to JXorth American forms, and the smaller ones nearly globular. They must have been used for breaking larger and smaller masses of the obsidian, respectively, but cannot have been employed for any of the finer shaping or flaking.

“Prof. Holmes gave much attention to the ‘ cores ’ or nuclei so familiar in all Mexican archfeology as the source of the flaked knives and blades. The debris- heaps are full of these in an interesting form— cores roughly blocked out and then rejected as not valuable or satisfactory, owing to lack of homogeneity or of good flaking quality. Judging from those rejected, the average size must have been 4 or 5 inches in length and 2 to 4 in diameter. Larger ones are known, but are rare. They are rudely cylindrical or polygonal, and bear a few facets, made to test their quality. The number of better ones carried away must have been enormous.

“These nuclei were evidently distributed all over the country as the raw product of the mines, and were then worked up into all the forms of knives, razors, and other flaked implements, as well as those modified by chipping and shaping, as arrow-heads, scrapers, etc. The flaking was not done at the quarry, as the delicate edges would be liable to injury in transportation. The further history of a core is described and illustrated from abundant specimens by Prof. Holmes. The flaking was carried on upon any nucleus as implements were made from time to time, the size of the ‘core’ and the width of the flakes removed from it decreasing as the process went on. Whether the force was applied to the end of the nucleus by percussion or by pressure is not certain. Finally tlie core became so reduced that nothing more could be flaked from it, and these exhausted nuclei are common objects around old inhabited sites.”

Obsidian objects are occasionally found in the United States as far east as Ohio and Tennessee. But it is useless to specu- late as to their source, inasmuch as the distance from Central Ohio is about the same, — some 1700 miles, — to either the Yel- lowstone Park, the regions of the Gila, or ancient Mexican mines. Moreover, the number of such objects found east of the Mississippi is so small that little significance attaches to them.

The obsidian-work in ancient Mexico appears under three dis- tinct types,— flaked objects, chipped objects, and polished ob- jects. The knives, as already noted, were for the most part “ flaked,” by either pressure or percussion, from a mass, which finally became a “ core.” They are usually long, thin slips, with

CxiMS AXP PEECIOCS STONES OF MEXICO.

two parallel sides, exceeding! j sliarp-eclged, and blunt ends, tbo sides being generally somewliat curved on their surfaces. These were fastened into handles, probably of wood, by asphalt or some black cementing substance, traces of which may often be seen at one end of the razor-like blade.

For arrows or spear-heads, the flaked piece was subjected to a chipping process, to produce a point and to give symmetry of form. Sometimes they were very large, and must have re- quired a great amount of careful work. Two such blades or lance-heads 18 inches long, both Mexican, almost identical in form, and marvels of fine chipping, are preserved, one in the W. W. Blake collection, U. S. ISTational Museum, Washington, D. C., and the other in the Trocadero collection, at Paris. One or two similar examples, though not quite as large, were shown in the Mexican section in the Ethnology Building at the Buf- falo Pan-American Exposition of 1901.

The polished articles are objects of ornament, — mirrors, labrets and the like. Examples of these are to be seen in the National Museum at the City of Mexico; the U. S. National Museum ; the Trocadero collection at Paris ; the British Mu- seum ; and in all leading archaeological collections.

A number of the finest known mirrors and engraved plaques of obsidian are in the Trocadero museum. A square one from Texcoco, measuring 9.5 by 8.5 by 1.2 in. (24 by 21.6 by 3 cen- timeters), and a round one, convex on one side, from Oaxaca, 6.5 in. (16 centimeters) in diameter, are wonderful pieces of primitive stone-work. The one possessing the greatest archaeo- logical interest is the square plaque described by the director, Dr. E. Hamy, on which is the inscription, “ Ypanqueizalitzli 4 acaiV (Dec. 9, 1483, the date of the laying of the first stone of the Great Temple of Mexico). The polished carved figures are exceedingly interesting.

No modern lapidary can do finer work than is shown in some of these old Aztec articles of obsidian. In the City of Mexico, articles are now sometimes offered for sale as antiques which are unquestionably of modern manufacture. These are, in general, crudely carved ; and the polish is inferior to that of the ancient pieces. Among such imitations, the writer has ob- served dozens of masks of black obsidian with gray sheen, 8 in. high, and two figures of small animals, besides other minor articles.

Gems And Precious Stones Of Mexico.

A richly-mottled, red-and-hlaek, hroivn-and-blaek, or yello\r- and-hlack variety of obsidian, called marekanite, or “ mountain mahogany,” is found in the State of Jalisco, often in sufficiently large masses to be useful as a decorative stone, since it admits of high polish. Associated with it in considerable quantity are pearl-stone or sphierulite, which shows reddish-brown spherules in a gray matrix, and pitchstone, a related mineral, which has, however, the luster rather of pitch than of glass. Mineralogically, obsidian is, for the most part, orthoclase, or potash-felspar, while pitch-stone is nearer to oligoclase and albite, containing soda and lime in place of potash.

To sum up the results of this art, w’e have as the step of the lapidary process, “ flaking,” performed upon the won- derful obsidian, producing the flakes used as knives or razors. As the result of subsequent chipping, we have spears and knives, 14 inches in length, which are marvels of careful and patient work. Finally, as polished ornaments, we have labrets, or lip-ornaments ; rings, for the nose and ears; ornaments as well as mirrors that measure 2 ft. ; crosses, and other carved objects. The labrets are frequently as thin as paper, and pos- sess a faultless polish. There is in the Mexican ISTational Mu- seum a large figure of a monkey, some 8 in. across, worked out and down to the thinness of paper.

Pyrite {Iron Pyrites ; Iron Bisulphide ). — This mineral also was, to some extent, wrought by the ancient Mexicans into mirrors and other ornamental objects. The mirrors were generally convex on one side and polished flat on the other ; and the polish is frequently still retained and very brilliant when cleaned. The convex side was often curiously carved and decorated. There are numbers of these pyrite mirrors in the Trocadero (Paris) ; the U. S. Ifational (Washington) ; the Field Colum- bian (Chicago), and other museums, and our ex-president, Mr. John Birkinbine, possesses a very fine one. Among other objects, two are notable : (1) in the TJ. S. National Mu- seum (Blake collection), a human head, 2 in. high, into which have been inserted eyes of white chalcedony ; (2) in the Christy collection, London, two human skulls, encrusted with turquoise, in which the eyes are represented by polished balls of pyrite.

This iron bisulphide, though a very common mineral, is rarely found in masses pure and compact enough to be cut into

Gems Axb Peecious Stones Of Mexico.

such objects as those above described. There must have been in Mexico a locality where it so occurred, and perhaps might still be obtained ; but the place appears to have been entirely lost. I need hardly say that its rediscovery would be highly interest- ing to both arehgeologists and mineralogists.

Tecali, or Mexican Onyx . — This beautiful stone has been for some years past one of the most important mineral products of the Republic. It was carved by the Aztecs into a variety of objects, now to be seen in collections. The name tecali is that of its principal locality, and is itself a modification of the Mexican Teocali a temple, literally house of God,’’ like the Hebrew Beth-el. In 1876, the crude, rough stone commanded $50 per cub. ft. At present the same quantity is sold for, say, one- tenth of that price, or even less. "When first introduced into modern art, it was said to come from the vicinity of Puebla; but it is known to occur at several points — Tecali, Tehuaean, Etla, etc., — in the States of Puebla and Oaxaca, and also in Durango and Coahuila, where it has been more recently found. The magnificent specimens which surprised the world, when first shown at the U. S. Centennial in 1876, were even finer than those shown at the Paris Exposition of 1900. This Mex- ican onyx has been an important source of profit to Puebla and Oaxaca, and may become such to Durango and Coahuila, or some of the many other regions in Mexico which contain numerous eaves in limestone.

A few years ago, very fine material of this kind was discov- ered and worked at Rew Pedrara, in Lower California. The pink variety, here found, which is quite rare, was much ad- mired at the Chicago Columbian Exposition of 1893. But the locality appears not to be worked.

Mineralogically, this Mexican onyx is classed as an aragon- ite. Dr. Mariano Barcena, of the Mexican Commission to the Philadelphia Centennial of 1876, has published an account of its occurrence and chemical character. It is a carbonate of lime, containing small quantities of the oxides of iron and man- ganese, to which are due the variegated colors for which the rock is so much admired. The specific gravity, 2.9, shows that it is aragonite. As already remarked, it was extensively used by the ancient Mexicans, specimens of whose handiwork are preserved in our museums in masks, idols, and a variety of

GEMS AjSE precious STONES OP MEXICO.

Other 0 ‘bjects. The softness of the material (it can be readily carved with a knife) has tempted some of the modern Mexicans to imitate these ancient objects, in order to meet the demand of tourists ; and within the past ten years fully one hundred times as much Mexican onyx has been thus shaped and wrought as was ever used in ancient Mexico. The modern artists often present grotesque, fearful forms, which sell much better than the real antiques or simple copies of them.

This material is entirely stalagmitic in its formation, and carries. yellow-brown and red oxides of iron, deposited between layers of the aragonite. It is generally cut across the layers, and thus acquires a beautiful veined appearance. AVhen it is cut, however, parallel with the layers of deposition, a botryoidal structure is well shown, the mineral being so translucent that the colored markings resemble colored clouds. It is one of the most beautiful ornamental stones of any age, and has been used extensively for ornamental purposes in Europe, as well as in the United States, where it was first introduced about 1876. The natives in the vicinity of Puebla sell a great deal of it in the form of trays, crucifixes, reliquaries, inkstands, penholders, paper-folders, paper-weights, single fruits or bunches of fruit, fish, or other natural objects, which are skillfully carved, not only as to shape, but often with remarkably happy utilization of the colors in the stone. So great is the variety of tints in which the material is found, that there is scarcely a limit to its possibilities for such purposes. Bernardino de Sahagun refers to iztac chalcUhuitl white or fine green, and transparent, obtained from quarries in the vicinity of Tecalco, which Dr. Daniel G-. Brinton belives to be the modern Tecalco ; and the description and locality answer so well to those of our Mexican onyx,'’ that there can be little doubt that this stone is Sahagun’s iztao ehcdehihuitl.

In 1888, Mr. William Cooper, of Esperanza, discovered in the volcano of Zerapoatepetl, in southern Mexico, a deposit of a beautiful mineral, to which he gave the trade-name of mosaic agate," but which is really the same as Mexican onyx, or arag- onite — with this difference, however, that while the Mexican onyx is always veined or stratified, the new material is a brec- ciated or ruin "-aragonite. The original formation has evi- dently been entirely broken up, the fragments having been sub-

Gems And Precious Stones Oe Mexico.

sequently cemented together, and the crevices all filled with a new deposition of aragonite. In other words, a deposit of Mexican onyx wms fractured by some disturbance (probably volcanic), and later deposition of the same material has cemented it into its present form. Like the true tecali it is susceptible of a high polish, the difference between the two being that, in the mo- saic agate,” the straight bands of color characterizing the onyx ” aragonite have been broken up and disseminated in fragments throughout the mass, giving an even more pleasing and brilliant appearance. It can easily be cut into thin slabs, makes beautiful ornamental tops for tables and bureaus, and has also been cut into solid columns, and used for the pedestals of busts and statues. Lor some jeoxs, past, however, little has been heard of this promising material.

Geologically, the Mexican onyx-deposits are regarded as chiefly of Quaternary age, though those near Tehuacan, at San Antonio de las Salinas, in Puebla, are referred, with probabil- ity, to a late date in the Pliocene Tertiary.

A7nber , — For 15 or 20 years past, specimens of a remarkable amber have occasionally been brought by travelers from some locality in southern Mexico. The only information gained concerning it is that it is brought to the coast by natives, who say that it occurs in the interior so plentifully as to be used for making fires. It is rich golden-yellow in color, and, viewed in different positions, exhibits a remarkable fluorescence, similar to that of uranine, which it also resembles in color. A speci- men, lately belonging to Mr. Martins T. Lynde, but now in the Tiffany collection. Field Columbian Museum, measures 4 by 3 by 2 in., is perfectly transparent, and even more beautiful than the famous so-callel opalescent ” or green amber found in the Sicilian province of Catania. It would be extremely valuable in the arts, if it could be furnished in adequate and regular supply.

Amber was used as an incense by the Aztecs. Fragments have been found on the altars of ancient temples, and also in the Catholic churches in early Mexico. A small flat disk 1.5 in. in diameter, and engraved like the center of the Mexican Calendar-stoe,” is in the Field Columbian Museum, Chicago. Like the amber found in the Roman excavations, in Europe, it has a gray or. opaque outer coating, on a rich brown interior.

Gems And Precious Stones Oe Mexico.

Eesumb.

The following propositions comprise the conclusions which may he drawn from the foregoing pages, together with state- ments concerning gems, etc., not discussed, and, in the writer’s judgment, not needing to he discussed in this paper :

1. ISTo authentic record is known of the discovery of the diamond in any Mexican State.

2. Sapphire has been found in one instance, as specified on a preceding page.

3. Small emerald specimens, attributed to a locality in Guer- rero, are shown at the School of Mines in the City of Mexico.

4. Topaz, in a beautifully crystalline red variety (not yellow topaz, like that of Brazil) has been found at San Luis Potosi and in Durango.

5. Tourmaline has never been found in Mexico.

6. Turquoise is not known to-day as occurring in Mexico ; yet, in view of the considerable use of this stone by the Mexicans of pre-Columbian times, it must be considered as possible, at least, that localities containing it were once known, and may be hereafter re-discovered. Yet it is not impossible that tur- quoise was obtained by the ancient Mexicans through barter with the peoples to the north of their country.

7. The precious or noble ’’ opal is found in considerable abundance, but not often of the best quality and highest value as a gem, though, so far as beauty is concerned, the Mexican

fire-opal,” with its magnificent profusion and variety of color, rivaling the delicate splendor of the humming-bird, has never been surpassed by the opals from other parts of the -world. The disadvantages of the Mexican opals have been sufficiently discussed above.

8. Concerning other minerals already enumerated as used by the ancient Mexicans, such as the other quartz gems, pyrite and obsidian, it may be fairly said that, however interesting to archaeologists, they present, at this time, no prospect of value as assets of national wealth or bases of profitable industry.

9. Jadeite, which has been discussed at considerable length in this paper, ofiers to mineralogists and archaeologists a fasci- nating problem, the solution of which might prove valuable to mining engineers, jewelers, and patriotic political economists also. We are confronted by the startling fact that the .museums

Gems And Precious Stones Op Mexico.

of the civilized world contain thousands of Mexican objects, wrought with great skill and artistic finish from a material of great durability and beauty, especially when, as is sometimes the ease, it possesses a deep green tint scarcely equaled by that of the emerald itself.

Mhat ivere the original sources of this beautiful and valuable material ? Do any considerable deposits of it exist in Mexico ? That is not impossible. W e may find such a deposit any day. But we must confess that the manufactured objects known to us indicate no knowledge of the mineral in place to have been possessed by the ancient Mexicans. They seem to have ob- tained it exclusively from pebbles or boulders in the beds of streams, and never to have followed such stream-beds upwards to a solid original deposit. On the other hand, that does not prove that such a search would not lead modern prospectors to jadeite deposits, even equaling those of the famous mines in Burma.

The evidence now at hand from China (where jade has long been a highly-prized art-material) or Burma, where it has been mined with great profit, does not help us much in studying the Mexican problem. One thing seems, however, to have special significance, namely, that neither jadeite nor articles wrought from it have been found so far north as Queretaro, in Mexico, and, so far as now known, have never been found in the neigh- boring United States. These seem to prove that it was not imported into Mexico; that it was never produced there in sufiicient quantities to be exported; that the limited product of it was kept at home for religious or other reasons ; and, finally, that the rich deposits of it in situ if such exist in Mexico (as they certainly do in Burma), are probably not far from the districts where it was gathered in pebbles and boulders, to be paid as tribute to conquerors, and to be wrought into objects of religion and art.

From both the scientific and the commercial standpoint, the problem thus presented is not unworthy of attention from mem- bers of the American Institute of Mining Engineers.

The Yalue Of Ores In Mexico.

The Value of Ores in Mexico.

By N. H. Emmons, 2Nd, Parral, Chihuahua, Mex.

(Mexican Meeting-, November, 1901.)

In the United States the value of gold- and silver-ores is everywhere reckoned in ounces troy of the metal per “ short ton ” (2000 lbs. avoird.) of the ore. In the case of silver, which fluctuates in market value, the Hew York quotation on a given day must be known, in order to determine the gross value of an ore at that date.

In Mexico the assay is reported in kilogrammes of silver or grammes of gold per metric ton. As everyone is aware, this is practically a percentage system, 1 kg. of silver per metric ton (1000 kg.) being 0.1 per cent.', and 1 gramme of gold per metric ton, 0.0001 per cent. The notation is simple and con- venient for both assayer and miner.*

The Mexican government purchases at an unvarying price for silver, payable in silver,-and at a fixed price for gold, pay- able in gold if the seller insists, but preferably in silver at about the rate of exchange between U. S. gold coin and Mexi- can silver coin. The value of silver is |40.915 per kilogramme in Mexican silver dollars. That of gold is $675,416 per kilo- gramme in gold coin. The mints do not, as a rule, issue gold dollars, as the government keeps them to pay the interest on the national debt. Almost all bullion containing a consider- able percentage of gold is shipped to foreign countries (prin- cipally the United States) to be refined.

The Mexican mint receives for refining and coining no bullion which is not at least .950 fine in gold and silver, separately or

Note by the Secbetabt. — The complicated calculation required to con- yert into percentage (so as to correspond with the form in which all other ingre- dients of an ore, as determined by analysis, are always reported) the U. S. ex- pression of ‘oz. per ton,’’ is as follows :

The only unit common to the avoirdupois and troy system is the grain. The avoirdupois pound contains 7000 grains ; hence a short” ton contains 14,000,000 grains. The troy ounce is 480 grains ; hence a short ” ton contains 14,000,000 480 29,166| troy ounces. One troy ounce per “short” ton would be,

The Value Oe Gees In Aiexico.

combined. For tbe fine silver, it pays §40.915 Mex. per kilo, less 2 per cent, coinage-charge and 3 per cent, stamp-tax. For assaying each bar, not more than 35 kg. in weight, §2.50 Mex. is charged, and for separating gold from silver, §0.75 per kg. of bullion. Gold (if over 3-lOOOths is present) is paid for at §675.416 gold per kg. ; but payment is made in silver dollars at about 10 points below the current quotation of exchange. Finally, the State tax about to be mentioned is collected upon bullion, unless it has been previously paid on the ore.

Government charges practically unknown in the United States are the taxes on ores of silver or gold, paid both to the Federal andto the State governments throughout the Republic of Mexico. These taxes (being laid upon gross product, with- out reference to profit) are likely to be so severe that in many parts of the Republic it has been the custom not to insist upon the payment of the full State tax. The Federal tax, however, known as the mintage-tax, is collected upon all the gold and silver produced in the country — either at the mints upon the bullion presented for coinage, or at the points of export ux->on ores or bullion shipped to other countries.

The State extraction-tax ’’ is levied on ores mined, and sup- posed to be collected before the ores leave the mine-yard or patio.’ This has been found, for many evident reasons, im- practicable ; and it has come to be the custom to collect the tax as the ores leave the mining camp, or, if they are treated in the camp, then as the product is shipped away. The govern- ment may accept the sampling and assays of the owners; or an official may be sent to superintend the sampling, and take a special sample for government assay. The manifest of the shipper states the number of metric tons shipped, and of kilo- grammes of silver and gold per ton. The collector calculates the silver-value of the shipment at $40,915 per kg. of silver, and collects 2 per cent, of that value for the State, and also, according to the Federal statute, 30 per cent, of the State tax, or 0.6 per cent, of the value, as the Federal tax. The total (2.6 per cent, on $40,915) is a direct tax on the silver in the ore of $1.0638 per kilogramme, or (1 kg. being 32.15 oz. troy) about 3.3 cents per oz.

If the ore is smelted in Mexico, the smelter pays the tax; if it is exported, it must be accompanied with a consular invoice, and sampled and assayed at the border by the Mexican govern-

The Value Oe Ores In Mexico.

ment. In tMs case the mintage-tax (that is, the charge which would have been made if the bullion had been sent to the Mexican mint) is also collected. For bullion, matte or other metallurgical product, this tax of 5 per cent, is collected upon the full assay value of the metal contained. For ores, it is col- lected upon 90 per cent, (and is therefore 4.5 per cent.) of the assay-value.

Finally, if ore is sold to any purchaser in Mexico, there must be a bill of sale, or factura'' on which revenue-stamps to the amount of 3 cents for every or fraction thereof are affixed and cancelled by the seller. This stamp-tax is not peculiar to sales of ore. It is required for every sale of merchandize amounting in value to $20 or more. The value here contem- plated, however, is not the gross value, calculated as above de- scribed, but the net value, or amount paid by the purchaser.

It will be seen that the taxes on ores of gold or silver mined in Mexico comprise 2.6 per cent, of gross value as State and Fed- eral extraction-tax, plus 4.5 per cent, as mintage-tax, or, in all, 7.1 per cent, on the gross assay-value, to which must be added the stamp-tax on fcictura of 0.6 per cent, on the net .value.

In order to show how the value of a given ore to the miner is determined, it will be convenient to assume an example, bearing in mind that some of the conditions stated would vary with the locality. In most districts, the regular gold-price paid by the smelters for silver in ores is 90.5 per cent, of the Hew York quotations; for gold, 95 per cent, of the assay, at $19.50 per oz. ; and for lead (if the ore is a rich lead-ore), 1 cent per lb. on 90 per cent, of the contents as per assay; allowances for freight and treatment being made according to local conditions — the latter, according to a regular scale for neutral '' ores, with suitable modifications for departures from that quality. We will assume $9 IT. S. money per short’’ ton for freight and treatment, and take as a basis the Hew York quotations of Sept. 20, 1901, which were 58.26 cents per oz. for silver, and 4 cents per lb. for lead. Bankers’ exchange in the City of Mexico on the same date was at 1.165 per cent, premium.

We assume also a neutral ore containing per metric ton, 1000 grammes of silver and 3.43 grammes of gold (z>., 29.167 oz. silver and 0.1 oz. gold per ton of 2000 lbs.) and 20 per cent, of lead. This ore would pay the miner as follows ;

The silver, at 58.25 cents per oz., would be worth $18,728

The Yalxje Of Ores In Mexico.

U. S. currency per kilo, and would be paid for, as above stated, at 90.5 per cent, of this value, making upon the ore assumed $16.96 for silver. Gold at |19.50 per oz. would be worth $0,626 per gramme; and 95 per cent, of 3.48 grammes at this price would bring $2.04. Of the 20 per cent, of lead (200 kg. per ton) 90 per cent., or 180 kg., would bring 1 cent per pound (2.204 cents per kg.), or $8.97. The total for silver, gold and lead would thus be $16.96 + $2.04 + $3.97 $22.97 U. S. currency per metric ton, apart from the extract! oivtax and stamps on “ factura,” freight and treatment. (The purchaser, paying for only 90.5 per cent, of the silver and 95 per cent, of the gold, assumes the mintage-tax.)

Deducting the assumed treatment-charge of $9 per short ton, which is $9.92 per metric ton, we have as the net returns to the seller $22.97 — $9.92 $13.05 IT. S. currency per me- tric ton. But from this he must still pay the extraction-tax of 2.6 per cent, on the nominal value of $40,915 per kg. of silver and $675,416 per kg. of gold (reduced to silver at about 2.10 exchange), or, upon the ore here assumed to contain 1 kg. silver and 3.43 grammes gold per ton, $1.18 in Mexican money, and also the stamp-tax of 3 cents for each $5 Mexican money. Reducing the above return of $13.05 to Mexican money we have ($13.05 X 2.165) $28.25, which would require 18 cents stamp-tax. Consequently the ultimate net return to the seller would be, in Mexican money, $28.25 — ($1.18+$0.18)= $26.89.

Recalculating on the American basis of ounces per short ton, we would have as the value per short ton of the ore under

consideration :

Silver: 90.5 per cent, of 29.167 oz. at 58.25 cts., . . |15.38

Gold : 95 per cent, of 0.1 oz. at |19.50, . . . . 1.80

Lead : 90 per cent, of 400 lbs. at 0.01, . . . . 3.60

Total in U. S. money, 120.78

Less treatment charge per ton, 9.00

Net value in U. S. money per sLort ton, $11.78 Or, in Mexican money, at (2.165), 25.50

From this we have to deduct the extraction-tax, which is, as above stated, $1.18 per metric ton (2.204 lbs. avoird.), and would therefore be per short” ton, $1.18 X 2000 -fr 2204 $1.07, Mexican money. And, finally, the stamp-tax on the factura would be, as before, 18 cents, making total deductions

Vol. Xxxii. — 7

The Value Of Oees In Mexico.

of fl.25. Subtracting this amount from $25.50, we have a final net return per short ton of $24.25 Mexican or $11.20 TJ. S. currency. It will be understood, of course, that this cal- culation is simply a re-statement of the one previously stated, and is introduced simply to facilitate comparison for those who are not accustomed to reckon by the Mexican method.

Two comparative statements will be specially interesting to American miners and sellers of ore, as showing respectively :

1. What would be the net return in the United States for ore sold under the same conditions, i.e., with freight and treat- ment at $9 per ton, and lead quoted at 4 cents per lb. in HTew York; and

2. How the value of such ore in Mexican money will be affected by an extremely high or low market price of silver.

1. Ore of the character assumed above, if mined in the United States and sold under the same conditions as to freight and treatment charge and price of lead, would return to the miner 95 per cent, of the silver-value, or $16.14 instead of $15.38; 100 per cent, of the gold-value at $19.50 per oz., or $1.95 instead of $1.80; and 90 per cent, of the lead-value at full Hew York quotations of 4 cents per lb., or $14.40 instead of $3.60, making a total of $32.49, instead of $20.78, per short ton. Deducting $9 for freight and treatment, we have $23.49 U. S. ($50.86 Mex.) as against $11.20 to the Mexican miner of the same ore, situated at an equal distance from the smelter.

2. The effect of fluctuation in the price of silver upon the value of Mexican ores may be illustrated by assuming that sil- ver is quoted in Hew York at 40 cents per oz. instead of 58.25 cents, as in the above examples. In that case, exchange will be forced up to $3.18. We would then have, per ton of 2000 lbs., 95 per cent, of 29.167 oz., at 40 cents, or $10.56 instead of $15.38 for the silver, and the other items would remain un- altered, so that the total wmald be $15.96, or, after deducting $9 as before, $6.96 U. S., which, however, by reason of the higher rate of exchange would be $22.13 Mexican, as against $25.50 Mexican with silver at 58J cents. It will be seen that the increased value in Mexican currency of the gold and lead, due to the lower price of silver and the consequent rise in ex- change, greatly diminishes the loss on the silver in the ore.

To elucidate still further the bearings of this curiously-bal- anced and complicated set of constant and variable factors upon

The Value Oe Ores In Mexico.

the Mexican mining industry, let us take as an example a re- duction-works, located at the mine, and so situated with regard to ores, fluxes, etc., as to be able to produce bullion high enough in silver to be sold directly to the Mexican mint. In other words, the standard value of $40,915 per kg, will be received for the silver, and in lieu of $9.92 U. S., charged for freight and treatment, the charge for treatment will be $15 Mexican per metric ton. Omitting, for simplicity, gold and lead, and con- sidering the ore to carry silver only, the miner will receive per metric ton, on ore containing 1000 grammes of silver, 840.915 -$15 $25.91 Mexican, less the taxes and duties above set forth. This return is independent of the price of silver. If silver drops to 40 cents, as above supposed, he will still receive $25.91, Mexican, less the same taxes and duties as before — only the exchange-value of this sum will be smaller, by reason of the higher rate caused by the fall in silver. But this smaller exehange-value does not affect his expenses for labor and power, because wages, fuel and domestic supplies are paid for in Mex- ican money, without regard to temporary fluctuations in the market-price of silver. It is only in the purchase of imported supplies for mining and milling, or machinery, etc., needed for repairs or new constructions, that the ditference is felt. Of course, any dividends that might be paid, though they would be no smaller in Mexican money, would be reduced in value to foreign owners by the higher rate of exchange.

Lead has very little value for the Mexican miner, since the price paid for it by smelters is practically nothing, compared to what is paid in the United States.

Copper- and gold-ores pay more profit to the Mexican miner (whether calculated in U. S, or in Mexican money) the lower the price of silver and the higher the rate of exchange.

Profits (estimated in Mexican money) from silver-ores, if they can be treated locally, at expense chiefly payable in Mex- ican money, are affected only by the amount of imported sup- plies required for their treatment. If they go to smelters which make their charges in U. S. money, the returns will depend on the price of silver and the rate of exchange.

As a general conclusion, it may be said that, by reason of the peculiar conditions explained and discussed above, the mines of Mexico are less dependent upon the market-price of silver than those of the United States.

100 The Sierra Mojada, Coahxjila, Mexico, Ore Deposits.

The Sierra Mojada, Coahuila, Mexico, and Its Ore-Deposits.

By James W. Malcolmson, Chihuahha, Mex.

(Mexicau Meeting, November, 190L)

Introduction.

This paper treats of the history and development of the Sierra Mojada mines in the north of Mexico, the character and extent of the ore-deposits, and the methods of mining the ore.

The growth of the smelting industry in Mexico in recent years is, to a large degree, due directly to the output of the lead-bearing ores from the Sierra Mojada mines, and at the present time (1901) new smelters are being built, looking to this district for their supply of lead-ores.

These mines are located in the southern part of the State of Coahuila, in the Eepublic of Mexico, in latitude 27° 24' N. and longitude 103° 43' W. of Greenwich.

The last account of the Sierra Mojada published in our Transactions was contributed by Mr. Eichard E. Chism, in Oc- tober, 1886.* Since that time some 3,000,000 tons of ore have been extracted from the mines, and much additional informa- tion has been developed regarding the mineral deposits.

Since 1886, the Mexican Northern railroad, 78 miles in length, has been built from Escalon, connecting the camp with the Mexican Central railway, a trunk-line from El Paso, Texas, to Mexico City.

The distances by rail from Sierra Mojada to the principal smelting-centers are as follows : To Torreon, Coahuila, Mex., 179 miles; to Monterey, Nuevo Leon, Mex., 422 miles; to El Paso, Tex., IT. S., 494 miles; to Aguas Calientes, A. C., Mex., 522 miles; to San Luis Potosi, S. L. P., Mex., 644 miles; to Pueblo, Colorado, TJ. S., 1158 miles; to Argentine, Kans., IT. 8.,

Trant.j xv., 542.

The Sierra Mojaba, Coahuila, Mexico, Ore-Deposits. 101

1661 miles. The larger proportion of the ore mined hitherto has been shipped to El Paso, Tex., and to Monterey, Mex.

I. History.

In June, 1878, a certain ITestor Arriola or Arriolana ob- tained permission from the government to form a band of men to go to this part of the desert and watch for a party whom he suspected to be coming from San Antonio, Tex., with a load of contraband goods. He thought the smugglers would pass near the mountains where the mines are to-day ; but they took another road, thus causing him to spend several idle days. During this time he found some lead-bearing ore, of which he had assays made at his home in Mapimi ; and, finding that it contained silver, he returned with some prospectors, located the Blanca mine, and also sunk a winze on what is now the Jesus Maria mine. The camp soon obtained an immense amount of notoriety, as the following extract from Mr. Chism’s paper shows :

‘Some years ago, when I was seeking an illusive fortune in the primeval for- ests of Brazil, there penetrated even to my headquarters in that far-ojS land the story of a new-found mining district, where mountain peaks were ribbed with silver and valleys teemed with virgin gold. . . . The . . . stories caused hun- dreds of men to seek their fortune in Sierra Mojada, and to return heaping curses, loud and deep, upon the vivid imaginations that had evolved the glitter- ing fiction.”

One expedition went from Pachuca in 1879, under the direc- tion of the Real del Monte Mining Company, which sent a fully-equipped party to the camp — a distance of more than 600 miles overland — by stage and wagon.

The mines are in the midst of an extensive desert, and at the time of their discovery the nearest railroad point was San Antonio, Tex.

In the early period of its development, the camp was claimed by the adjoining States of Chihuahua, Coahuila and Durango. Until the rival claims were settled, the district was governed as a Territory by the national authorities. It was finally de- clared to be a part of the State of Coahuila; and, at the present time, 30 per cent, of the entire revenue of that State is derived from taxation of the Sierra Mojada mines and their products.

102 The Sierra Mojaha, Coahuila, Mexico, Ore-Deposits.

The first ore-bodies discovered were basic lead carbonates in limestone, outcropping at the surface, and lying nearly hori- zontal, with a slight dip to the south. For several years these were the only deposits known to exist ; but eight years ago very large ore-bodies of siliceous copper-ore, high in silver, were discovered. Latterly the limestone itself in the vicinity of the copper- and lead-ore deposits has been worked with suc- cess, by reason of the silver chloride disseminated through it.

The mines were originally worked by their Mexican owners in a somewhat primitive style; but in 1887 a great impetus was given to their development through the acquisition of the control of the two principal mines, the San Salvador and the San Jose, by the Consolidated Kansas City Smelting .and Ee- fining Co. Since then, American methods and American capital have been employed with great success in opening up the mining properties ; and to-day nearly the entire output is produced under American control and supervision.

In the early days the ore was freighted by teams 75 miles to Escalon, and shipped over the Mexican Central railroad to El Paso, Tex., or to Argentine, Kans. ETo duties were col- lected by either the Mexican or the United States govern- ment. In 1889 a local duty of 2.6 per cent, of the value of silver- and lead-contents was imposed; and, since 1896, an ad- ditional duty of 4.5 per cent, on the silver-contents has beeti collected at the frontier by the Mexican Federal government ; and by a decision of the U. S. customs authorities, ratified by subsequent legislation, a duty of 1.5 cents per lb. of the lead has been collected on its admission into the States.

To-day, on the average grade of ore (assaying 10 oz. of silver per ton and 15 per cent, of lead) produced in the Sierra Mo- jada, and shipped to the U. S., 7 per cent, of the value of the silver-contents is collected by the Mexican, and 37 per cent, of the value of the lead-contents by the U. S. government, or, in all, between 50 and 60 per cent, of the amount paid by the smelter to the miner for the ore on the mine-dump.

Much of the lead-ore shipped at the present time to the U. S. is smelted in bond, in the same manner as the Canadian lead-ores, and subsequently sold outside of the country.

The decision of the U. S. customs authorities — Imown as the Windom decision — was the result of strong representa-

THE SIERRA MOJADA, COAHUILA, MEXICO, ORE-DEPOSITS. lOS

tioiis of the Colorado smelters, who believed that Mexican lead, mined by so-called ‘pauper-labor/’ was ruining their business, through the competition of the Missouri river smelt- ers, to which points the Sierra Mojada ore was shipped. The apparent results after the imposition of the duties were, that the Colorado miners were charged $1.00 more per ton for the treatment of siliceous ores, on account of the diminution of the lead-supply ; a powerful and successful smelting industry, employing thousands of men, has been developed in Mexico by the investment of millions of dollars, largely of American cap- ital; and another result has been that Missouri lead-ores, low in silver, have been diverted from their natural path East over a long westerly detour, first to Colorado, and finally back to the East again, as bullion.

II. Productiox.

The early production of the Sierra Mojada was small; but in April, 1886, Mr. Chism mentions that the weekly ore-product from the entire district was about 1000 tons, which would be, roughly, one-quarter of the present output.

Since the building of the Mexican Northern railroad in 1890, the average production has been approximately 200,000 tons annually. The production during 1900, from official returns, was 187,110 metric tons (2204 lbs. avoirdupois), as follows :

Mine.

Metric Tons.

Mine.

Metric Tons.

Veta Rica,

. 41,018

Jesus Maria,

. 3,980

San Jos4, .

. 30,285

La Sultana,

. 3,039

San Salvador, .

. 28,783

Parena,

. 2,475

Yolcan Dolores,

. 15,552

Buena Ventura,

. 2,040

Tiro Juarez,

. 14,331

Exploradora,

. 1,017

Encantada,

. 13,470

Tiro 10, .

Tiro 11, .

. 10,595

San Francisco, .

Esmeralda,

. 7,931

Galan Zona,

Providencia,

. 6,032

La Aurora,

Fortuna, .

. 5,191

On account of the inaccessibility of the camp, no ore was considered worth mining, in the early period of operations, which did not assay 20 oz. silver per ton and 25 per cent, of lead, with a large excess of iron over silica. Mr. Chism, in his paper, mentions this as the minimum grade in 1886 and Mr. Judson, in the subsequent discussion,t calls attention to the

Tram.y xv., 552.

t lhid,y p. 588.

104 The Sierra Mojada, Coahuila, Mexico, Ore-Deposits.

fact that lead, before that time, was valueless in the Sierra Mojada, to such an extent that the local smelters endeavored to produce a slag high in lead, thereby securing greater fusi- bility. Slags then made would contain as much as 80 per cent, of lead.

In 1892-6 a large tonnage of copper-ore was mined, assaying from 30 to 120 oz. of silver per ton, the whole production averaging between 60 and 70 oz. of silver per ton, with 4 to 5 per cent, of copper.

At the present time, practically the same ore-bodies are being worked which were discovered in the early period of develop- ment; but the improved conditions permit the profitable min- ing of a very much lower grade of ore than formerly. The following table shows approximately the tonnage, assay and analysis of the various ores mined in the camp during 1900 :

Pb.

SiOa.

FeO.

CaO.

BaS04

Metric

Ag. oz.

Per

Per

Per

Per

Per

Tons.

per Ton.

cent.

cent.

cent.

cent.

cent.

Basic lead -ore, .

. 80,000

Siliceous lead-ore

. 23,000

Irony lead-ore, .

. 7,500

Siliceous ore, .

. 2,500

Irony ore,

. 1,000

Lime ore, .

. 25,000

Siliceous lime, .

. 52,000

In all the

mines now

open

there

are very

large

bodies of

mineral of the classes mentioned above, but lower in grade. In time, with lower freight- and treatment-rates, these will un- doubtedly prove to be a source of profit.

III. GrEOLOaY.

1. General Description.

The mountains forming the Sierra Mojada are entirely of limestone, of the Carboniferous series, "which in this part of Mexico attains an enormous thickness. Their most prominent feature is an almost vertical cliff overlooking a small plain, three-quarters of a mile in breadth and 6 or 7 miles long, to the north. This clift* rises to a height of over 3000 ft. above the level of the plain, making an impressive and majestic view, shown in Figs. 2, 3 and 4. Fig. 4 gives an idea of the im-

THE SIERRA MOJADA, COAHIJILA, MEXICOj ORE-DEPOSITS. 105

mense scale of tHs cliff' formation tlie mines being hardly noticeable in the foothills.

In Mr. Chism’s ideal section of the camp,* reproduced in Fig. 1, the general character of the folding movement of this great limestone formation is well represented, but it can hardly be considered as a simple bending, because in places on the Sierra Mojada precipice the limestone strata can be seen where they have been folded upwards to a vertical position at right angles to the normal dip. (See Fig. 5.) In addition, therefore, to the flexure observed and mapped by Mr. Chism, it is evident that faulting and dislocation of the strata have also taken place to some extent.

2. The Alliiiiim,

The alluvium described by Mr. Chism in his paper (see Fig. 1) has also, on further investigation, proved to be an interest- ing feature of the district. Instead of being a recent product of erosion, as Mr. Chism believed, it is covered, in places, with patches of Cretaceous lime, towards the east of the camp on the Trinidad and Parena claims (see Fig. 15) and towards the west on the Blanca claim. The Cretaceous lime, which exists in a capping forming the summit of the Blanca hill, is 100 ft. thick, and is well shown in the photograph of La Blanca hill in the left of Fig. 2.

This Cretaceous limestone, overlying the alluvium, is a proof that, after flexure and erosion of the great underlying limestone formation, there was a second submergence of the district below water-level. Apparently the Cretaceous lime is not in anyway related to the ore-deposits ; but it is of interest as showing the geological character of the changes which have taken place during the process of ore-deposition.

3. The Breccia.

Below the alluvium described by Mr. Chism (Fig. 1), and between it and the underlying limestone, there has been found another formation, namely, a porphyritic breccia, entirely dif- ferent, both in appearance and in composition, from the con- glomerate or alluvium above. The alluvium is composed of

Trans,, xv., 548.

106 The Sierra Mojada, Coahuila, Mexico, Ore-Deposits.

ronncled boulders and pebbles of limestone cemented by cal- careous material, and is a product of erosion of the surrounding mountains. The breccia below is made up of angular frag- ments of felsitic and granite rocks, cemented by a siliceous matrix.

The conglomerate is porous ; but the breccia is impermeable. Advantage is taken of this fact to sink shafts through the con- glomerate to the breccia, in order to obtain a water-supply, which is fairly abundant. The surface of the breccia, below the alluvium, is apparently in the shape of a trough or gulch, running from west to east; a shaft sunk on the Emma claim (see Fig. 15) showed the alluvium at this point to be 510 ft. thick; and the alluvium-breccia contact dipped to the south, in- dicating the probability that the center or deepest point of the gulch in that locality was farther south. Probably 80,000 or 40,000 gallons of water daily can be obtained from a well such as this ; but it is not improbable that after a very long period of drought only those wells which are located in the lower horizons of this underground trough would retain water. The location and dip of the alluvium-breccia contact at other points to the south is shown in the sections, Figs. 6, 7, 8, 9, 10 and 11.

Sinking into the breccia fails to develop more water ; and the limestone below it is quite dry. The normal water-level has not yet been reached in the camp, and water is never over- abundant.

Towards the southern boundary of the alluvium the feather- ing-off of both it and the breccia is shown on the sections. The breccia outcrops at the surface in few places only, but is very close to it in the Jesus Maria and Exploradora claims (Fig, 6),* and only 70 ft. deep in the Dionea claim (Fig. 9).

The origin and deposition of the breccia have been the sub- ject of much speculation. It is soft and easily worked, and has been considered to be a disintegrated product of faulting. It is more probably a volcanic mud-flow from below the center of the valley, ie,, between the Sierra Mojada and Sierra Plan- chada ranges. (See Mr. Chism’s section, Fig. 1.)

Porphyritic breccias, or volcanic mud-flows, of this character, are common in the north of Mexico. In the lead-mining dis- trict of Santa Eulalia, near the city of Chihuahua, northwest of Sierra Mojada, an immense area of limestone is covered with

THE SIERRA MOJADA, COAHUILA, MEXICOj ORE-DEPOSITS. 107

somewhat similar breccia, which in this latter ease forms the summits of the mountains instead of the bottoms of the valleys. In places at Santa Eulalia it is more than 1800 ft. thick. As a rule, the Santa Eulalia breccia contains rounded fragments of limestone, but in some horizons it carries angular fragments of porphyry, at times very similar to the Sierra Mojada breccia. In the rounded limestone pebbles enclosed in the porphyry at Santa Eulalia it is not uncommon to find unaltered fossils, in- dicating the absence of any great amount of heat during the processes forming the breccia. The matrix of the breccia in Santa Eulalia is highly siliceous, containing glassy feldspar, and resembles a typical porphyry. To the writer it is difficult to account for the presence of feldspar crystals and unaltered limestone fragments in the same rock. But it seems more difficult to consider the Santa Eulalia or Sierra Mojada breccias as other than volcanic mud-flows, which probably have been squeezed upward through dikes, zones of fracture, or other apertures in the limestone. Several such dikes (in all eases without lime or other fragments) have been opened up in Santa Eulalia, breaking through the underlying limestone formation; but in the Sierra Mojada nothing is yet known as to the source of the breccia.

The siliceous breccia of the Sierra Mojada, which lies directly upon the limestone, is intimately connected with the ore-bodies. The contact between the breccia and the limestone is smooth, and carries ore-deposits of value. The most valuable ore-body ever opened up in the camp — the San Jose copper-stope — was apparently an impregnation of the siliceous breccia with silver chloride and copper oxide. In this, as in all other cases, there was a well-marked wall or plane of demarcation on each side of the ore-body, with a clay selvage or gouge between the ore and the adjoining rocks. In a few places along this ore-body a thin layer of barren breccia would be found between it and the lime ; but usually the north wall of the deposit was breccia, and the south wall limestone. In the Dionea mine, from 15 to 16 ft. of the contact between the breccia and the underlying limestone is very much decomposed, although carrying nothing of value. The steepnSip of the breccia-lime contact in the San Jose mine is very noticeable, and in the Buena Ventura shaft the lime is cut at a depth of over 600 ft.; but north of this it

108 The Sierea Mojada, Coahuila, Mexico, Ore-Deposits.

gradually assumes a more horizontal position. In the Veta Eiea and Dionea mines (Fig. 15) the contact gradually flattens until at the Juarez shaft it is 130 ft. from the surface. In places, the roll or fold is so great that the local dip of the con- tact is towards the south. In the Veta Rica and Dionea mines (Figs. 8, 9 and 10) this roll or crease of the breccia-lime con- tact was found to carry ore, while the limestone for a distance of over 100 ft. from the contact was impregnated with silver chloride. Other rolls or folds of the contact-surface, the axes of which run approximately north and south, that is to say, at right angles to the last mentioned folds, have been found by diamond drilling, but hitherto have not been demonstrated to carry ore or give indications of value.

IV. The Ore-Bodies.

The zone in which the ore-bodies have been found is approx- imately along an east and west line, and is marked by shading on Fig. 15. The ore-bodies are fairly continuous, and extend for a total distance of over 13,000 ft. from west to east.

The ore-deposits of the camp may be divided into three main groups: (1) the contact-deposits; (2) the lime-impregnations; and (3) the lead-carbonate ores in the limestone. Although the latter were the earliest ores discovered and worked, the breccia- lime contact deposits will here be described first; since the earlier-worked ore-bodies are apparently branches from these deposits, and were the first discovered only because the breccia and conglomerate had been eroded from their vicinity, leaving the lead-ore exposed.

1. The Contact-Deposits.

In the Exploradora mine (see section, Fig. 6) a body of lead- carbonate of considerable thickness was found on the contact towards the extreme west of the zone of ore-deposition. The breccia here was apparently unchanged, but a large amount of the limestone had evidently been removed in the process of ore- deposition. After the ore had been mined out, the breccia settled on the square sets and rock-filling to such an extent that a marked subsidence and slip of the overlying breccia took place, the whole mass sliding apparently on the contact surface. From this deposit of lead-carbonate, a very plain vertical crack

Ideal section on line N S'’ E.~S. 8° Y., across Sien-a Mojada valley, through the Esmeralda Mine, showing the Anticlinal Break (Beproduced from Mr. Chism’s paper. Tram., xv., 548.) Horizontal scale, I : 50,000 ; vertical scale, 1 : 10,000.

Sierra Planchada

110 THE SIERRA MOJADA, COAHdlLA, MEXICO, ORE-DEPOSITS,

Left-hand Half of View of Sierra Mojada, looking SE. from Town. (See Figs. 16 and 3. ) The flat-topped hill just behind the build- ings on the left is La Blanca hill, capped with Cretaceous limestone.

Fig.

THE SIERRA MOJADA, COAHUILA, MEXICO, ORE-DEPOSITS. Ill

Extension to the Right of Fig. 2. (The tower of the parish church on the left is seen at the right in Fig. 2.)

View of Sierra Mojada, looking SW. from El Estanque. (See Fig. 15). Mines : A, San Salvador ; B, Esmeralda ; C, Dolores D, San Miguel ; E, Providencia ; F, Fortuna ; G, San Jose ; H, Jesus Maria ; L, La Blanca hill.

THE SIERRA MOJADA, GOAHUILA, MEXICO, OKl-DEPOSITS. 118

Fig. 5.

San Jos and Exploradora Mines, Showing Upturned Limestone Strata

Above.

Jesus Maria and Exploradora Mines. N. — S. Section through the Hidalgo Shaft.

114 The Sierra Mojada, Coahtjila, Mexico, Ore-Deposits.

San Jos4 Mine, General Elevation, looking West.

The Sierra Mojada, Coauuila, Mexico, Ore-Deposits. 115

North

116 The Sierka Mojada, Coahuila, Mexico, Oke-Dbposits.

Fig. 8.

Limestone

N. — S. Section through Veta Kica Shaft.

(The exact position of the contact between breccia and lime is not known ; but it should be higher up than is here shown, and should dip more to the right)

Conglomerate

Sketch Showing N. — S- Section of Veta Kica Ore-Bod7.

118 The Sierra Mojada, Coahuila, Mexico, Ore-Bbposits.

San Salvador IVIinp.. T'f. — S. Spot-inn thrnncrli IVTain Slinft

Conglomerate

120 The Sierra Mojada, Coahuila, Mexico, Ore-Deposits.

Fig. 12.

Mining Lime against tlie Breccia, Yeta Rica Mine.

The Sierra Mojada, Coahuila, Mexico, Ore-Deposits. 121

Fig. 13.

The San Jose Mine in 1899.

Fig. 14.

122 The Sierra Mojaba, Coahuila, Mexico, Ore-Deposits.

runs directly to the south into the lime, making a prominent feature of the western part of the Jesus Maria mine (see Figs. 6 and 15).

The crack shows slickensides, although the breccia contact to the north does not appear to be deformed or faulted in any way. This crack is intimately connected with a deposition of several thousand tons of basic lead-carbonate in the lime- stone, some distance from the contact ; and still farther south a large bodj" of iron oxide has been opened up, with very low silver- and lead-values (see Fig. 6). Several of these vertical fissures at right angles to the contact have been prospected. Their origin and importance is still a matter of conjecture. The fissure described towards the west of the Jesus Maria mine is one of the most strongly marked, and it shows ore-bodies re- lated to it in a more noticeable manner than any other. East of the Exploradora lead-carbonate deposit, and between the Jesus Maria and San Jose mines, an ore-body has been opened on the contact assaying from 15 to 25 oz. silver per ton ; 75 per cent, silica; 8 per cent, iron; less than 1 per cent, lime, and carrying traces of lead and copper. This ore-body varies in thickness from 10 to 20 ft. ; it is friable and sandy in structure, easily mined, and covers a large area, being found from the outcrop of the contact-surface in the Jesus Maria mine to a considerable depth in the San Jose mine. The lead-carbonates in the limestone immediately south of this deposit, instead of carrying an excess of iron over silica, as they did to the south of the first ore-deposit mentioned, are siliceous, carrying an ex- cess of silica over iron.

Only a short distance east of the siliceous contact-ore, but at a greater depth, was found the famous San Jose copper-stope. It is probable that the last mentioned siliceous contact-deposit and the copper-stope form a continuous deposit, changing in character with depth.

The San Jose copi)er-stope was the first ore-body discovered on the contact, and is the richest exploited hitherto in the Sierra Mojada. Its dimensions are, roughly, 450 ft. from E. to W., and 580 from K to S. on the dip of the contact. In thickness it varied from 6 to 20 ft., with a general average of perhaps more than 12 ft. The ore mined Irom the deposit assayed be- tween 60 and 70 oz. of silver per ton; 4 to 6 per cent, copper;

The Sierka Mojada, Coahuila, Mexico, Ore-Deposits. 123

40 to 50 per cent, silica; 3 to 8 per cent, iron ; and 1 to 5 per cent, lime, with traces only of lead.

The discovery of this deposit in 1889 was the cause of a new period of development in the camp. Shafts were sunk at many points to the lime-contact, with the object of investigating a region which had previously been considered valueless; but the result up to the present time has not been so f)roductive as was originally anticipated. Only a few ore-bodies have been dis- covered, and immense areas of the contact have l>een demon- strated to be barren. IS’o purely contact ore-body of any size has been discovered that at all approaches the San Jose copper- stope in either tonnage or grade of output. The section. Fig. 7, shows this contact copper-silver deposit, and its position with relation to the lead-carbonate ore-bodies of the San Jose mine. Attention is called to the upper part of the copper-deposit, which appears to leave the contact and roll over to the south, where it connects with the lead-carbonate deposits in the lime. This contact-deposit has apparently little or no direct connection with the lead-ore bodies except at this point. Although not shown in the section, there seems to be, in the upper portion of the copper-deposit, a roll or crease in the contact, which may have tended to divert the ore-depositing agencies from the con- tact into the lime. All these workings are now, unfortunately, so completely run together that it is difficult to secure accurate information on this point.

The San Jose copper-deposit differs principally from the two previously mentioned deposits in that it is apparently an im- pregnation of a layer of breccia between the main body and the limestone. There seems to have been no solvent action on the underlying lime, as in the Exploradora deposit, or leach- ing out of the alumina silicates, as in the second deposit de- scribed. The chemical composition and appearance of the San Jose copper-deposit and the overlying breccia are almost iden- tical. The basic lead-carbonate ore-bodies south of this contact- ore are entirely isolated from it, except at the upper part, as shown, where the copper-stope changes to lead-carbonate and dips south. The deposition of the lead-carbonates appears to be connected in some way with a plane of fracture or shrinkage parallel to, and some 120 ft. S. from, the breccia contact-plane. This plane or zone is observable on the general section of San

124 The Sierra Mojada, Coahuila, Mexico, Ore-Deposits.

Jose, Fig. 7, and a number of flat lead-carbonate ore-bodies may be seen running between the planes of stratification towards the south, branching from the inclined plane of lead deposition which is parallel to the contact. These two jjarallel planes, that of the copper-ore on the contact, and that of the lead-ore 120 ft. S., and wholly in the limestone, have given rise to a belief that the copper and lead carbonates represent distinct periods of ore-deposition. Between the zone of deposition of the lead-ore, parallel to but some distance from the contact, and the copper- ore on the contact itself, much of the limestone is impregnated with silver chloride, and from 0.5 to 2 per cent, of copper (see Pig. 7). To the east of the copper-deposit in the San Jose and Fortuna mines, very little ore has been found on the higher levels of the contact; but hTE. of the Veta Rica and Dionea mines the limestone was discovered much nearer to the surface than was originally expected, and extensive prospecting devel- oped the existence of the above-mentioned huge roll or crease of the contact-surface. Mineral of low grade, somewhat simi- lar in character and composition to the San Jose contact-ore, was found; but the financial result of the exploration was bad for a number of years. Finally in the Veta Rica mine the dis- covery was made that, although the contact-mineral itself was poor and unprofitable near the vicinity of the roll, the limestone below was impregnated with silver chloride — although at the same time with silica — to such an extent that the siliceous lime could be mined with a very respectable margin of profit. The ore carried, as a rule, 15 to 50 oz. Ag; 20 per cent. SiO., ; 20 per cent. OaO; 10 per cent. BaSO. A sketch section of the deposit is shown in Fig. 10. In some parts of this ore-body the silver-bearing lime is separated very distinctly from the sur- rounding barren lime ; but in most directions, particularly to the E. and W., there are no definite boundaries to the ore-body.

As mining progresses, the grade gradually becomes so low that it no longer pays to continue operations. Many thousand tons of ore have been mined from this ground, assaying from 15 to 40 oz. Ag; 10 to 20 per cent SiO.; 20 per cent CaO ; 3 per cent Fe ; and 1.5 per cent Cu, with no lead.

2. The Lime-Iynprcgnations.

The finding of lime-silver ores below the contact of the breccia aroused renewed interest in prospecting, not merely along the

The Sierra Mojaba, Goahuila, Mexico, Ore-Beposits. 125

contact itself, but down into the limestone ; and latterly, XE. from the Yeta Rica mine, in the Tiro 11, Dionea, and Tiro 10 ground, a limestone-deposit of considerable size has been opened up, several hundred feet in length and in cross-section as shown in Fig. 9.

Here two rolls in the breccia contact were found, one a few hundred feet north of the other. The axes of these rolls are roughly east and west; and they seem to be a north-easterly continuation of the roll previously found in the Yeta Rica mine.

In the northern roll, in the Dionea mine, the Juarez shaft wms sunk through 72 ft. of calcareous conglomerate, 59 ft. of siliceous breccia, and 16 ft. of decomposed contact-matter without value, to solid barren lime. Sinking being still con- tinued, the rib of barren lime proved to be only 13 ft. thick; and impregnated lime was discovered below it, assaying from 80 to 60 oz. silver per ton, with 15 to 20 per cent, silica. The Yeta Rica deposit (Fig. 10) is of a somewhat similar composi- tion. In the Dionea mine the southern roll contained, in the lime below the contact, siliceous lead carbonates, assaying from 12 to 15 oz. silver per ton, and 15 per cent, lead, with an excess of silica over lime.

The silver-lime impregnations are now of greater importance than the contact-deposits. They are divided into two classes : (1) those near the breccia contact; and (2) those far from the contact, in the vicinity of the lead-ore deposits. The first class (near or adjoining the contact) are found W. of the contact, in the San Jose, Yeta Rica, Tiro 11 and Dionea mines. These ores usually carry 20 per cent. CaO; from 15 to 20 per cent. SiOg, partly existing as silicate of alumina ; and barium sulphate from traces up to 12 per cent. Iron and zinc are found in small quantities (not above 3 per cent.) ; and most of the ore carries copper, seldom exceeding 2 per cent., but perhaps aver- aging 0.5 per cent. The silver is found as chloride. Appar- ently this limestone has been impregnated and silicified from the contact, through the leaching of a contact-deposit and its dissemination throughout the adjoining limestone. It is an in- teresting fact, however this may be, that the impregnated lime- stone near the siliceous copper-deposit on the contact presents some features in common with the contact-deposit itself. In

126 The Sierra Mojada, Coahuila, Mexico, Ore-Deposits.

this respect the large amount of decomposed and barren coii- tactrmatter found in the Veta Rica and Dioiiea mines is worthy of notice. In other parts of the camp, where no silver-lime impregnations exist, there is a marked absence of this altered and decomposed barren contact-material.

Ill the general section of San Jose shown in Fig. 7, a lime ore-body 30 or 40 ft. from the contact is shown. This deposit, which is of immense dimensions, is separated from the overly- ing copper-stope by 40 ft. of barren limestone. The copper- stope contained from 4 to 5 per cent, of copper and 60 to 80 oz. of silver per ton, and apparently had not been impoverished to any notable extent. The condition of the silver-lime ore- body here is an interesting commentary on this observation. It assays from 4 to 12 oz. of Ag and from 40 to 50 per cent. CaO, with traces of copper and only 3 per cent. SiOa. It is prac- tically a pure carbonate of lime, slightly impregnated with silver and little or no silica. The siliceous lime is dark-colored and easily distinguished from the barren lime. The San Jose limestone last mentioned is quite indistinguishable from the barren lime formation. Indeed it is only by constant vigilance and care that it is possible to mine the ore at all. It is necessary to take daily, from all working-faces, samples of large size for assay ; and even with this precaution it is not uncommon for lots of considerable size to be mined at a loss, on account of an un- expectedly sudden change in the assay-value. The boundaries of the silver-lime deposits are at times very plainly marked by walls separating the barren lime from the impregnated lime ; but usually such boundaries are not reached in mining, because the grade falls to an unprofitable limit, which varies with the silica-contents of the lime. It is common to find ribs and ir- regular masses of quite barren lime running through good stopes, with well-marked walls and good ore on both sides. There seems to be no general direction to these barren zones ; sometimes they are parallel, and sometimes at right angles, to the stratification. The lime ore-body previously described, S. of the copper contact-ore in San Josb, is entirely separated from it by a rib of barren lime ; and it is not likely that these silver-contents were derived from the contact, — at least not likely that they came from its upper levels. This lime was priginally discovered by following a fissure containing lead car-

The Sieeea Mojada, Coahuila, Mexico, Ore-Deposits. 127

bonate downward from tbe 4th level, 120 ft. from the contact. (See Fig. 7.) The lead-ore contained a large percentage of barium sulphate and silica, and changed in depth to very low- grade iron oxide, which finally disappeared, leaving only fissure- walls. Ill this fissure, parallel in strike and dip to the contact, sinking was continued in barren lime until near the 5th level. Here the lime was charged with silver chloride ; and there can be but little doubt that this impregnation came from the fissure, or others parallel to it, which perhaps at a deeper level run to- ward the breccia-contact. A cross-cut was driven from the copper-stope at the 6th level, 200 ft. below the 5th (Fig. 7), with the result that the silver-lime was again found, with 45 to 50 per cent, of lime, so that the presence of a large area of silver-bearing limestone wms thereby demonstrated.

The second class of silver-impregnation in the limestone (those found near, and associated with, the lead-ore bodies) are found towards the eastern part of the camp, and have been principally worked in the San Salvador mine. Their general relation to the lead-ore bodies and to the contact, which is here almost everywhere barren and unaltered, is shown in Fig. 11. There are here two classes of ore, found respectively in the upper and in the lower levels of the lead-deposits. The upper lime-ores usually contain 20 per cent, of lime, and in addition carry 10 to 80 oz. Ag; 3 per cent. Pb ; 3 to 8 per cent. SiOg ; 8 to 10 per cent. BaSO ; 5 per cent. Fe and 5 per cent, Zn. In this ore the silver, existing as chloride, seems to be in the in- terstices of the smaller joint-planes of the lime, and for that reason it is sampled with difliculty. In screening the ore, the fines usually assay 15 to 20 per cent, higher than the coarser fragments. In the lower grades an attempt was made to utilize this fact by screening the broken ore, using the larger and poorer fragments for mine-filling and shipping the fines. This peculiarity has not been observed in any of the other limes, and least of all in those grades where the lime-contents are excep- tionally high. In these latter cases, the silver chloride seems to be uniformly disseminated throughout the whole of the lime- rock ; and, after screening, the fine material assays the same as the coarse.

The lime-ores found in the regions of the lower levels of the lead-stopes are high in lime (usually over 35 per cent. CaO) and

128 The Sierea Mojaha, Coahuila, Mexico, Oee-Deposits.

seem to be, to a great extent, deposited as an ore-body of ap- proximately regular shape, with fairly well-marked boundaries. (See Fig. 11.)

The lime-deposits in San Salvador show in places well- marked faults, along approximately 1, and S. planes ; and the presence of barren patches of limestone is very plainly ob- served. The character and mode of deposition of these ores in the eastern part of the camp is still very imperfectly under- stood ; they run low in both silver and lime ; and it is difficult to mine them with a margin of profit.

3. The Lead-Carbonate Deposits.

The contact-deposits and the allied lime-silver impregna- tions beneath them, though scientifically interesting and eco- nomically valuable, are of minor importance compared with the lead-carbonate ore-bodies found wholly in the main lime- stone formation.

The Sierra Mojada has always been regarded as a source of lead-supply ; and to-day probably two-thirds of the entire pro- duct of the camp is lead-carbonate ore from these last-mentioned deposits. The average assay of the lead-ore, now mined at the rate of 120,000 tons annually, shows approximately 12 oz. of silver per ton and 15 per cent, of lead. At several points the lead carbonate outcropped at the surface .with nothing to obscure its presence ; and a large number of the ore-deposits now worked were opened up very soon after the original dis- covery of the camp. A comparison between Mr. Chism’s section (Fig. 1) and the general section of the San Josh mine (Fig. 7) shows the result of the fourteen years’ work done since Mr. Chism’s paper was written. The lead-ore deposits are everywhere oxidized, and carry varying percentages of iron and silica, according to their respective locations. Between the San Josfe and Jesus Maria mines the lead-ores found near the silica-contact ore are also siliceous in character, containing an excess of silica over iron. In fcJan Jose generally, the lead-ore bodies deposited along the before-mentioned plane, parallel to and 120 ft. S. of the brecciarcontact, are high in silica (con- taining, as a rule, 20 per cent. SiOa, with a small excess of iron) ; but as the ore-bodies are opened up toward the south and farther from the contact, the silica is gradually diminished and

THE SIERRA MOJABA, COAHUILA, MEXICOj ORE-DEPOSITS. 129

the iron increased. In the Lagartijo lead-stopes (the farthest from the contact in San Jose : see Fig. 7), the iron is usually from 50 to 60 and the silica from 3 to 5 per cent.

Ill San Salvador (Fig. 11), in the east part of the camp, the northern ore-body contains from 20 to 25 per cent. SiOg; 10 to 20 Fe; 20 BaSO; 3 CaO ; and 5 Zn. The southern and principal ore-body contains 10 per cent. SiOg, with from 25 to 50 iron oxide, and little or no barium sulphate. In the Yolean Dolores mine, on the contrary, the section of which is similar to that of Esmeralda, as shown on Mr. Chism’s sketch (Fig. 1), the southern part of the ore-deposit is more siliceous than the northern, offering thus a marked contrast to the previously- mentioned cases.

The lead-ore deposits are practically continuous along the foothills of the Sierra Mojada range for more than 2.5 miles from E. to W. Towards their western extremity, in the Ex- ploradora mine, they are found at or near the contact of the lime and breccia ; but towards the E. they gradually recede from the contact, until, in the Fronteriza mine, they are a long dis- tance S. of it.

Figs. 1, 7, 6, 11, 9 and 10 show sections of the ore-bodies in the Esmeralda, San Jose, Exploradora, San Salvador, Dionea and Yeta E.ica mines respectively, and give a fair idea of the changing character and shape of the deposits.

The lead-ore bodies follow to a limited extent the planes of stratification of the limestone, which is nearly horizontal in San Jos6 and Jesus Maria, but much steeper near the Yolean mine and in the Esmeralda ground. (See Mr. Chism’s original sketch, Fig. 1.) As a whole, the formation dips slightly SE., and the lead-ore deposits, towards their eastern limit, are more than 1000 ft. below the surface. In the San Jose mine, the zone of alteration and apparent faulting or disintegration of the lime- stone, previously described, S. of the contact and parallel to it, has yielded an immense quantity of lead carbonates, which had been deposited in the zone of disintegration.

The horizontal ore-bodies, or sheets of ore, extending south- ward from this zone have also supplied for many years a large tonnage of lead carbonates annually. In the upper level of the San Jose mine, where the limestone outcrops at the surface, the isolated horizontal deposit known as the Lagartijo (Fig. 7)

VOL. xxxii. — 8

130 The Sieeha Mojada, Coaeuila, Mexico, Ore-Deposits.

lias been found. Its connection witli the zone of deposition mentioned above as lying parallel to the contact has evidently been removed by erosion. The ore-body shoivn in Mr. Chism s sketch (Fig. 1) is of a similar character, and was at one time connected with a deposit farther north, cither on the contact or along the zone of disintegration described. In this latter ease the limestone strata dip more rapidly towards the south. Mr. Chism’s sketch shows the nature of the San Miguel, Volcan and Dolores lead-deposits, which dip to the south like the Esmeralda deposit.

In the eastern part of the camp, at the San Salvador mine, work has been carried on, since the discovery of the camp, in an ore-hody lying some distance S. of the contact. Along the western boundary of San Salvador the ore outcrops at the surface in a creek-bottom ; and it is continuous eastward throughout the whole of the mine, gradually receding from the contact and appearing at greater depth. From the E. boundary of Salvador it extends through the Encantada, and a considerable distance into the Pronteriza mine, attaining a total length of 4500 feet. On the Salvador-Encantada boundary it is 450 ft., and on the Encantada-Fronteriza boundary *750 ft., below the surface.

A noticeable peculiarity in the eastern part of the camp, particularly in the Salvador mine, is the presence of a shattered and completely broken-up limestone roof over the lead-carbo- nate ores. This shattering appears to have been due to the collapse of the enormous roof after the reduction in bulk of the ore-hody, due to oxidation. This disintegration is in places so complete that the lime, over a considerable area, is made up of small angular fragments, which sometimes run into the stopes like very coarse sand.

Low-Grade Ores.— In addition to the ores actually mined, all the ore-bodies contain immense quantities of low-grade ma- terial and iron oxides. The sections show simply the shape of the ground as mined, and do not accurately show the sixe and extent of the complete deposits. The higher-grade ore is not by any means continuous throughout the ore-deposits; and as cheaper mining and lower freight- and treatment-rates permit poorer ore to be handled with profit, it has been not uncommon to find large and valuable ore-bodies of great size, which were cnthely overlooked when the ground was first prospected. In

THE SIERRA MOJADA, COAHUIIA, MEXICO, ORE-DEPOSiTS. I8l

several of the mines ore-bodies of considerable size have been opened up, years after careful exploration, two or three times renewed, had been made, in poor vein-matter only a few feet away.

The Sierra Mojada ore-bodies, like most of the lead-ore de- posits in limestone in northern Mexico, appear to have been completely oxidized. They are usually roughly horizontal, forming interstratified ore-sheets varying in thickness from 2 to 40 ft. Pipes or pendant columns of ore are often found, extending from the floor of the normal ore-bodies downward to a depth of sometimes 200 ft. These chimneys are more common towards the eastern part of the camp than elsewhere. One of them is shown in the section (Pig. 11) of the San Sal- vador. They often contain from 5000 to 10,000 tons of lead- carbonate ore in their upper portion ; but as depth is increased the contents gradually change, until very little lead or silver remains, ores of these metals being replaced by low-grade siliceous iron oxides. These, in turn, gradually pass into sili- ceous clay, below which the unchanged limestone is found in all directions from the bottom of the hole or pipe. In some of the lower levels of the mine, masses of zinc carbonate have been found; but the presence of zinc sulphide is nowhere prominent. hTo gold is found in any of the mines. In the lead-deposits, very pure lead carbonate is often found associated with large masses of native sulphur and gypsum, both very pure. The segregation is so noticeable that pure gypsum is looked upon as a valuable indication of the proximity of ore. Many car-loads of native sulphur have been shipped to the United States for chemical purposes; and much more has been burned off from the ore in open piles, to make the grade of the lead-carbonate residue high enough for profitable shipment.

Sulphides are encountered in small quantities, usually around the boundaries of the ore-deposits. In the deepest ore-bodies hitherto discovered in the camp (in the San Jos4 and Fronteriza mines), there is no appreciable increase in the relative quantity of the sulphide-ore.

132 Tee Sierra Mojada, Coahuila, Mexico, Ore-Deposits.

V. Methods of Mixing.

1. Early Methods,

For a number of years after the discovery of the Sierra Mojada the ore was mined by a pillar-and-stall method, poorly adapted to ore-bodies showing such marked irregularities in roof and floor, and, at times, such large dimensions in every direction. In several instances, although the ore-bodies were fairly well exposed, the whole mine had become dangerous to work before 20 per cent, of the ore in sight had been extracted. The Mexican owners and operators finally reached a point where they were no longer sure of being able to continue operations. At that time the use of lumber was almost un- known, and its very great cost was considered as prohibitive. The following description of the mining methods employed in 1886, taken from Mr. Chism’s paper,* gives a very good idea of these old methods :

‘'In working the mines, no mechanical appliances of any kind are used except picks and crow-bars. The ore tumbled down in the working-faces by bars and picks is shoveled with the bare hands, or perhaps with a horn spoon, into leather bags, which are brought to daylight on men’s backs [Fig. 14], Here the ore is weighed and delivered to the pickers, who separate the dirt and native sulphur

from it and sort it into grades In the underground work little effort at

regularity is made. The workings follow the richest streaks of the deposit, leav- ing irregular pillars surrounded by tortuous passages, which now and again open into large chambers. There are no proper stopes, all the workings being in reality headings. Descents from one level to another are generally made by the

usual notched sticks Timbering has been resorted to in many places,

but not to the extent one might expect ; and it is often lacking where safety most imperatively requires it.”

It must be admitted that these early methods, which were chiefly confined to following the best ore-streaks, were very successful in discovering and opening up a very large portion of the ore. In several of the mines very little ore has been discovered which was not originally opened up by the first owners; subsequent economies and successes having been effected by more efficient methods of handling and treating the ore. The isolated deposits, however, and the contact-de-

Tra7iis,y XV., 652.

The Sierra Aiojada, Coahuila, Mexico, Ore-Deposits, 133

posits not outcropping at the surface, have practically all been discovered in later years, since the older methods of prospect- ing did not include cross-cutting and driving in barren ground for purposes of investigation.

2. Modem Methods.

Shortl} after Mr. Chism’s description was written, in 1887, an American corporation, the Consolidated Kansas City Smelt- ing and Eefining Co., undertook to work several of the mines, under lease from the owners. Texas lumber was shipped into the camp, da Escalon on the Mexican Central R.R., 75 miles away, at a cost, laid down at the mines, of $40 to |45 XI. S. cur- rency per 1000 ft, board measure. Square-set methods of mining and timbering were introduced. Experienced timber- men from Colorado were employed at first to put in the sets ; but the Mexican miners themselves finally became so skillful that of late years practically all the timbering has been done by native labor. A few years after taking over the mines the American operators built from Escalon to the camp a railroad, which has been one of the most prosperous enterprises in the Republic.

With the introduction of American methods of mining, it was found profitable to re-work the old and but partially-ex- hausted stopes throughout their entire extent. On account of the large size and tiie softness of the lead-ore bodies, the cost of mining has always been low ; and by the introduction of square sets of timbering, carefully filled with rock, the old workings have been kept accessible to a remarkable degree. In the eastern part of the camp the limestone roof over the lead-ore deposits was found to be completely broken up and disintegrated, resembling in its treacherous character an over- lying quicksand. In timbering up to this roof the greatest vigilance was required to prevent a run,” and, in spite of all precautions, a large amount of sandy limestone would often find its way through openings between the timbers. In some instances, men were buried and suffocated by such irruptions of lime-sand ; to prevent which, a thin crust of lead-carbonate ore was, at tirnes, left to assure the solidity of the roof. Re- cently nearly all this ore has been extracted. Square-set tim-

184 The Siehra Mojaha, Coahuila, Mexico, Obe-Heposits.

beiiug is now very generally employed in tbe extraction of the ore. The criticism has been made that “.caring ’’-methods should have been inaugurated, and the opinion has been ex- pressed that if a system of regularly caving the roof of the lead-ore deposits had been adopted, instead of the rock-filled square sets, an increase in both safety and economy might have been effected. Subsequent work, however, has completely vin- dicated the advantages of the square-set method of timbering for this ground. Since the earlier operations, when only ore of much better grade was mined than is the case to-day, it has been found possible to re-work with profit (in some instances three or four times) the ore-bodies in all the mines, because they contained immense quantities of mineral of lower grade than could have been utilized at first, which successive reduc- tions in freight- and treatment-rates gradually rendered avail- able for profitable extraction. Under the “caving” system these low-grade bodies would not have been economically ac- cessible.

In many of the stopes the square sets had been filled, not with lime-rock from the surface, but with low-grade ore from the old workings; and in many cases this filling has been entirely removed and shipped. Moreover, the square-sets, though often crushed and to a great extent demolished, have always per- mitted exploration work around them in all directions, and the ground has been re-worked at a price, and with a facility, which would have been impossible had it been permitted to cave.

The first tiers of sets were laid on the lowest profitable hori- zon of the stopes ; and the timbering was gradually carried upward in a series of vertical slices toward the roof. When the whole area of the ore-body had thus been gradually and completely mined (in some cases over a horizontal extent of 10 acres, and with more than 24 sets from floor to roof), the whole superincumbent weight of limestone had to be supported. It was only by careful and thorough rock-filling that security was obtained and collapse prevented. Since then, much ore of profitable grade has been discovered to be below the old square-set stopes, and thousands of square sets have been sunk from the old sets by “ hangers.” To-day, no difl&culty is

The Siekra Mojaba, Coahuila, Mexico, Ore-Beposits. 135

found in safely mining an ore-deposit of hard or soft ore lying directly under a worked-oiit and filled stope, where the over- head pressure is very great indeed; and the additional quantity of timber required is very small. The method employed is to sink one line of sets vertically to the lowest point where slop- ing is to be re-commenced. These sets are suspended from 10 by 10-in. beams, 16 ft. long, reaching over three or more sill- pieces of the old sets. The new sets to be sunk are hung from these beams by pieces of 3 by 6-in. lagging nailed to the hew sills, and the overlying 16-ft. stringer. After the new floor is reached (which may be 6 ft. or 60 ft. below the old floor), new sets are thrown out horizontally, using the initial column or columns of suspended sets with hangers, as winzes or man- ways. The new sets are started in the usual way, being filled with rock, and gradually tied up to the old upper sets as the work proceeds. The San Salvador mine (where over one mil- lion tons of ore has been mined from what is practically one continuous ore-body) and the lead-ore deposits in the San Jose have all been re-worked once, and in some cases two and three times, a large proportion of the output having been obtained by re-opening and continuing in every direction old, square-set stopes. It is certain that much of this ground could never have been cheaply prospected and re-examined, and thereby made available, under any other system of timbering.

Mining the Lime-Ores , — The last-mentioned method is em- ployed in the mining of soft lead carbonates, often sandy in character, and usually with a soft roof or floor, or both, com- posed either of low-grade iron oxides or rotten limestone. In mining the lime-ores an entirely diflferent proposition has to be faced.

In the lime stopes, which are always hard, very large cham- bers, 60 by 100 ft. or more, can be opened up with safety (Fig. 12). Finally, however, it is found desirable to support the roof on account of the very large area exposed. The distance from the floor to the roof exceeds, at times, 75 ft., and attempts have been made to support the latter by a large num- ber of 12 to 14-in. posts, filling in the spaces between the posts with waste rock, as the roof is gradually stoped away. A space of from 6 to 8 ft. is left between the ore in the roof

13G The Siekka Mojada, Coahcila, Mexico, Oee-Deposits.

and the filled floor. As the posts are gradually buried, new ones are placed upon the old ones or upon the rock-filling, and the roof is carried ujiwards. This method has not proved ailtogether satisfactory, and is now seldom employed. The floor of the stope is usually not absolutely barren, but simply is of too low a grade to be mined. Later, when it is desired to prospect or work below, to obtain information, the ground filled by this method is much less accessible and more costly to reopen than a stope filled with square-sets. For this reason square-sets are generally employed in the lime-stopes, although they are not usually put into place until the stope is of large size. A large number of sets are then put up at once, from floor to roof, and solidly filled with waste rock. The space around the margin of the stope is usually left open for sam- pliuff. The square-sets are used here as a holder or frame- work for the column of waste rock which supports the roof. As the lime-ore is usually of low grade, leaving a very small margin of profit for mining, it seems a pity to spend for timber 75 cts, U. S. currency per ton of ore mined; but hitherto no more desirable method has been suggested which will compare with this in eflflciency.

Prospecting . — In the lead-ores lying completely in the lime- stone, prospecting is almost unnecessary. An immense sum of money which has, indeed, been spent in driving in barren lime, looking for lead-ores, has simply been thrown away ; since the ore found has finally proved to be apart of some deposit already worked some distance away. The time-honored maxim which advises the miner to “ stay with his ore ” applies with great force in this locality. The reductions of recent years in freight- and treatment-rates have enabled ore to be mined at a profit which could not be touched before ; and this has been the principal factor in maintaining the prosperity of the camp. The mining of low-grade deposits has resulted again and again in the discovery of ore-shoots of higher grade, entirely separated by zones of low-grade mineral from the deposits formerly worked. This is a very encouraging feature attending the mining of low-grade fluxing-ores, which in themselves leave only a minimum profit to the miner. In such ground there is no better way to expend money on investigations than to follow

The Sierra Mojada Coahuila, Mexico, Ore-Deposits. 137

the low-grade shoots of iron oxide, fissures or cracks in the lime, or the numerous caves that are continually discovered in the vicinity of the ore-hodies. Large bodies of gypsum are also frequently met near the lead carbonates, and are considered to be guides worth following.

The lime-ores are much more difficult to prospect than the other classes. Even when found near the contact, they are often separated from it by a rib of barren lime several feet thick. The lime-impregnations are often suddenly faulted or cut off by strips of barren lime-rock, sometimes only a few feet thick, after which the ore is again encountered. These slips often cause the abandonment of a stope for several months, until work in other stopes gradually opens up ground in the vicinity and shows the direction of the lost ore-shoot. There is often nothing in the appearance of the lime-ore to indicate whether it is of high-grade in silver or quite barren, and vigi- lant daily sampling and assaying is necessary to maintain the grade and tonnage of the output.

Frospecting the Contact — In several of the older mines the contact has been carefully and systematically explored by a series of levels and winzes, analogous to the methods of ordi- nary vein-mining ; but towards the northern and eastern por- tion of the camp it is still almost entirely unexplored. A large number of diamond-drill holes have been sunk through the conglomerate and breccia to the lime-contact, and at times into the lime below ; but the total result up to date has been of a negative character. In spite, however, of the barren result of drilling-operations, it is impossible to doubt that large ore- bodies will yet be found on this contact-plane by further ex- ploration.

Eastern Extension of the Ore-Zone , — Towards the eastern part of the camp a lead-carbonate deposit, wholly in the limestone, assaying 5 oz. silver ; 20 per cent, lead ; 40 per cent, iron ; 3 per cent, silica; and 5 per cent, zinc, has been opened in the Fronteriza mine, at a depth of 800 ft. The relatively small area of this body and its great depth lead the writer to believe that, beyond this mine, the chances of profitable mining opera- tions upon it are not good. In the future the mines with lead- carbonate deposits on or near the contact will probably find

138 The Siekka Mojada, Coahuila, Mexico, Ore-Deposits.

extensions below their present lower levels, since these bodies run southward more or less horizontally, and there is nothing’ yet to indicate the absence of ore-deposits at lower levels than those now exploited.

Eoisivng . — In neaidy all the mines the ore is hoisted to the surface through vertical shafts, some of w’hich have noticeably small dimensions (one being 3 by 4 ft. inside the timbering). In the Dolores mine, where the ore is in a flat sheet, dipping S., it is hoisted up an underground incline, and from the sur- face is let down by a surface-incline to the railroad-switch. The two inclines are coupled together, and enough power is obtained from the surface-incline to work the mine-incline automatically. The mine-incline is 360 ft. long, and has a fall in this distance of 114 ft. The surface-incline is 1070 ft. long, with a total fall of 184 ft. The cost of hoisting the ore to the surface and lowering it again to the railroad is 10 cts. Mexican, money per ton. On the underground incline a 2 by f in. flat rope, and on the surface-incline a f in. round steel rope is used. The ore handled by this method is of very low grade, but the mining expenses are kept at a low figure; the economy effected by the double incline is the only condition which has made it possible to operate the ore-deposit. During 1900 this incline handled 15,000 tons of ore.

Mine-Fires . — On account of the very large quantity of timber in the mines (nearly 4,000,000 ft. being used annually at prices varying between f25 and $30 D. S. currency per 1000 ft.), every precaution is taken to prevent fire. The use of steel miners’ candlesticks is enforced, and fire-bosses are employed who have no other duty but to look out for signs of fire. In spite of these precautions, serious fires have occurred. One in the Veta Rica mine, in April, 1899, started in a lime-ore body adjoining the breccia-contact, which was filled with square sets. The fire rendered the mine inaccessible for several months ; large caves of the overlying contact material took place, and serious loss was incurred.

Timbering. — Originally, Texas and Louisiana long-leaf yellow pine was the only timber used, on account of its great strength and fiber; but it has become fully recognized by experience that square-sets, as such, are of but little use where really heavy pressure has to be resisted, except when carefully and

The Siekea Iiojada, Coahuila, Mexico, Ore-Deposits. 139

promptly filled witli waste rock. A much poorer grade of native lumber is now used, purchased from Durango at a cheaper rate than that paid for U. S. lumber, and filled as soon as conveniently possible after setting up. It is a ques- tion whether additional profit could not be made by using larger sets, since, on account of the low price of unskilled labor (§1.00 Mex. money or 50 ets. U. S. currency per clay), the rock-filling can be done extremely well and cheaply. The cost of timber in the Sierra Mojada is approximately 50 cts. IT. S. currency per ton of ore mined.

Water-Supply . — Among the interesting features of the camp are the large earthern storage-reservoirs for water, which have been built at various points by the mine-owners or operators. A small settlement of miners is usually found near each tank. At times these reservoirs become quite dry ; and although the w'ells do not fail, they are so deep, and the supply is so limited, that it is more economical to bring water in by the railroad, from points .along the Mexican Central railroad, hfearly every year a considerable quantity of water is shipped into the camp at a cost of from §2 to §4 Mex. money per 1000 gal- lons.

Labor . — Labor for the mines is fairly abundant. The Sierra Mojada miner earns usually §1.50 Mex. or §0.75 D. S. cur- rency per day. He is industrious and intelligent, and will mine and timber in the heaviest ground with skill and confi- dence. The loss of life in the Sierra Mojada mines is very small, presenting in this respect a marked contrast to several other camps in Mexico. This is perhaps clue, to a considerable extent, to the fact that many of the foremen and superintend- ents are Americans or Europeans, and, by reason of their po- sition as aliens, are compelled to take every precaution against accidents for which they might be blamed.

Climate . — The climate of the camp cannot be surpassed. The almost entire absence of clouds and rain throughout the year ; the clearness and purity of the air ; the absence of cold winters and hot summers — all combine to make the place at- tractive in spite of its desert surroundings.

140 COAL-EIELBS OF LAS ESPERANZAS, COAHIJILAj MEXICO.

The Coal-Fields of Las Esperanzas, Coahuila, Mexico.

By Edwin Ludlow, Las Esperanzas, Coahuila, Mex.

(Mexican Meeting, November, 1901.)

The Basin at Las Esperanzas.

For many years, coal has been known to exist in the valley of the Sabinas river, in the State of Coahuila, and for about 15 years it has been worked by the Mexican International Rail- way Co., W'hich opened mines for its own fuel-supply when the railway was built, and has been mining continuously ever since.

The coal-basin worked by this company lies along the Sa- binas river, principally on the SW. side. It covers a wide area and has been carefully prospected, but only in a few parts have the beds been found sufficiently thick and regular for economi- cal operation.

This Sabinas basin was considered the only one in this field, until, in the Spring of 1899, the Las Esperanzas basin was found by Messrs. J. L. Elliot and E. D. Peters, who were in Mexico looking after some copper-properties. After a further examination by Mr. James T. Gardiner, of Hew York, the Mexican Coal & Coke Co. was organized in June, and active work was begun on Hov. 5, 1899.

The coal-field of Las Esperanzas, situated in the State of Coahuila, about 85 miles SW. of Eagle Pass, Texas, adjoins and runs parallel with the Sabinas basin — an anticlinal separat- ing the two outcrops by about 2 miles. Fig. 1 is a sketch-map of a part of the basin.

The coal-formation is in the Upper Cretaceous, and corre- sponds with the Laramie measures of the United States. The following geological section, taken in Hogales canon, shows the measures between the massive limestones forming the Sierra de la Santa Rosa and the outcrop of the coal :

Section. Feet.

Limestone, Unknown.

Blue shale, 110

Shale and sandstone, 60

Bed of fossiliferous shale, 50

Coal-Fields Of Las Esperaxzas, Coahcila, Mexico. 141

Section. Feet.

Sandstone containing a large proportion of lime, . . 20

Sandstone strong in lime, with shale slips, ... 8

Blue shale, . 730

Soft sandstone, well bedded, with gray shale slips, . 120

Coal, 8

Sandstone and gray shale, in beds approximately paral- lel with synclinal axis, 4000

Fig. 1.

Fig. 1.

This section is graphically shown in Tig. 2.

The characteristic feature of the formation is the 1150 ft. of shale underlying the heavy sandstones. As the country is heavily covered with a gravel-wash, as thick as 100 ft. in places, and covering any exposures of rock, the shale served as a guide in the early diamond-drill work, always indicating when the hole was outside the outcrop hy a characteristic wash

of A rroyo

Coal-Fields Of Las Esperaxzas, Goahuila, Mexico. 14S

axis of the liasin dips *7° ISTTT., and as the sides of the hasin narrow instead of widen, the incdination of the coal be- comes steeper as it goes K., so that, at 4 miles from its SE. end, it forms a Y-shaped trough, with a SW. dip of 55, and, on the other side, a YE. dip of 70® to 75°. The heavy dips continue until the horse-shoe is formed at the YW. end, where the in- clination is again reduced to 6° ; but diamond-drill explorations at that end of the basin showed less than 3 ft of coal, and no development-work has been done there. The area of the basin at the SE. end, where the vein is of good thickness, with a dip not too steep for economical operation, is about 6000 acres. As shown on the sketch-map, Fig. 1, it is entirely enclosed within the property lines of the Mexican Coal and Coke Company.

Among the interesting features of the geology of this field are the lava-flows that came from craters in the Santa Rosa mountains, behind the outcrop, and covered the coal-measures in a sheet from 4 to 10 ft. thick, after they had been tilted into their present position. The first flow comes from between Yo- gales and Cedral canons and reaches across the synclinal axis of the Las Esperanzas basin. The second and heaviest flow lies between Cedral and the town of Muzquiz, and not only crosses the Las Esperanzas basin, but also continues 15 miles towards the Sabinas river, and then, reaching the W. bank, goes on down the river for 30 miles to the Hondo mines of the Inter- national Railway Co. This lava-flow is only cut, within this distance, by two water-ways; and with these exceptions, it forms a prominent ridge, from 0.6 to 2 miles wide, standing from 100 to 150 feet above the surrounding country. The sides are always steep and show clearly the lava, capping the sandstones and shales of the coal-formation, no apparent effect on their stratification.

The Beginxino of Operations.

The writer arrived on the property on the night of Yovember 5, 1899, and the view that met him next morning was not en- couraging. He saw a cactus and mesquite desert with no trees, no houses (except a few ‘‘jackals and no water; but he was told that a small spring, 2 miles away, would furnish enough for drinking. The work already done consisted of prospect- holes about half a mile apart along the outcrop ; and, as few

144 Coal-Fields Op Las Espera'Zas, Coahuila, Mexico.

of these had gone through the surface-coal, the outlook, from a mining point of view, was not flattering.

The instructions from the Xew York ofiSce were to open mines and obtain a production of 5000 tons per day as soon as possible. That is what we have all been trying to do ever since ; but although we have the plant to handle that amount, and sufficient coal in sight, it has so far been impossible to get enough miners to dig so large a quantity of coal per day. We have tried importations of American, negro, Japanese, Chinese and Italian miners ; but not many of them would stay — the Americans preferring to work in the coal-fields of the United States, while most of the others were unaccustomed to any kind of mining, and only a few of the best had the requisite perse- verance to stick by us, and learn how to mine coal.

Our Mexican labor we have had to teach and train. Many of our workmen of this class, coming from farms and cattle ranches, knew nothing about mining, and few of them appre- ciated the necessity of continuous labor; while many of those who came from the metal mines wmre more difficult to teach than green laborers, since their previous ideas of mining have to be eliminated before they can be taught to work for the large output necessary to a successful colliery operation. From some of the low-grade mining camps, like Sierra Mojada, however, we have obtained men who became, in a few weeks, good aver- age coal-diggers, and some Mexicans have learned to be really expert, and would be so considered in any field. These cases are, however, exceptional.

An idea of the Mexican laborer’s manner of working can be formed from the fact that, when we first put in tipple-scales, and paid the men by the ton for mining, they would invariably follow the car they had loaded out of the pit and find out how much it weighed, before loading another.

A study of the different results in the same mine, from the various classes of miners, gives the following averages in num- ber of tons per day, loaded in pit-cars: Americans (good miners), 10; negroes (good miners), 8; Italians (fair miners), 6 ; Japanese (fair miners), 5 ; Mexicans (green),* 2 ; and Chi- nese, 4 tons per day.

No average can be given for any Mexican miners except the inexperienced ones, since the expert Mexican miners all become contractors, employing from six to twenty laborers, and directing and inspecting, rather than personally laboring.

Coal-Fields Of Las Espekakzas, Coahuila, Mexico. 145

The boys are our strong hope. They work better and more steadily than the men ; and, growing up to a daily routine of occupation, they will make better workmen than their fathers, who come to the mines from the intermittent working life of the farm or ranch. There has been also a marked improvement in some of the men. Many who came here when work was first started, wearing blankets and sandals, now dress in good style, wearing shoes, often of American make; and the sale of American furniture and cooking-stoves is constantly in- creasing.

As hoisting-engineers and helpers in the machine-shop, we have found the natives good, -where the work is laid out for them ; but they lack initiative in taking hold in case of any break-down; and it is necessary to keep American foremen in nearly every department. As mechanics, carpenters and black- smiths, we are always able to get Mexicans competent to do any work laid out for them.

Ill planning the mining work vre had a clean slate. The coal-basin was defined by the prospect-shafts ; and it only re- mained to locate the openings at the most advantageous places for economical operation, and where the tipples could be located so as to bring the railroad to them without any bad grades or heavy work of construction.

Slope ISTo. 1 was located at what is now called the town of Las Esperanzas (see Eig. 6), and was sunk at right angles to the strike on a due W. course. Slopes Hos. 3 and 4 were located on the other side of the basin about 3 miles W., and run due 'N. Eoom was left at the end of the basin for Slope No. 2, to be put in at some future day.

The problem was to devise the best kind of tipple with the smallest practicable use of heavy timber (on account of its ex- pense); and also to arrange for a thorough cleaning of the coal, since the vein contained bands of slate which could not be removed underground, especially with labor that did not know coal from slate. We therefore adopted the tipple shown in the plates, in which the cars are hoisted up the slope and run by gravity from the mouth of the slope to the foot of an endless chain which catches the front axle automatically and carries the car to the top of an incline, where it detaches itself and runs over a mine track-scale, with a large weighing-dial

Vol. Xxxii.— 9

146 Coal-Fields Op Las Esperanzas, Coahuila, Mexico.

SO set as to come to zero with the empty car. The hand of the dial swings around as the loaded car passes over, showing the weighman the exact weight of coal contained in the car, with- out the necessity of stopping the car on the scales. It then runs over a Phillips automatic cross-over tipple, dumping the coal on the bars, and, being bumped off by the next car, runs downi ail incline to a back-switch, and from there, by gravity, back to the mouth of the slope, where it is coupled up, in trips of from 10 to 12 cars, to go dowm into the mine. The hooks on the car-hoist are so placed as to allow 6 cars per minute to be hoisted and dumped. This gives a capacity of from 8 to 10 tons per minute, which will take care of the coal as fast as we shall he able to mine it, when fully opened.

The coal, when dumped, goes over 1-in. bars and passes onto a picking-belt of iron slats, 3 ft. wide and 30 ft. long, arranged so that hoys can stand on either side and pick out the slate from the coal as it passes by them. The coal passing through the 1-in. bars falls on a shaking-screen with by |-in. perfora- tions; and the dust which passes through is sent to the coke- ovens, while the pea-coal passing over is either shipped for steam-coal or carried on another belt, to go in the same ear as the lump, making “ mine-run for the railroad-trade.

The mines are ventilated at present by temporary fans, 12 ft. in diameter; but twm Cappell fans, each of the capacity of -150,000 cub. ft. of air per minute, have been ordered, and should he in operation by the first of next year.

As part of the general equipment, we have had to put in a machine-shop, with lathe, drill-press, shaper, bolt- and pipe- ciitters, and a bolt-header. Also, a hospital, with two rooms - for patients, and a drug-store, with quarters for the doctors.

Since it was found to he very expensive to have ice brought to us, a 5-ton ice-plant was installed in connection with the butcher-shop; and the cold-storage furnishes beef and mutton much better than can be usually obtained in Mexico.

School-houses for both Americans and Mexicans, a court- house and jail, post-office and telegraph-office, all became neces- sary as the plant expanded.

The property, being what is known in Mexico as a Siacienda has a self-contained government of its own.

COAL-FIELDS OF LAS ESPERANZAS, COAHUILAj MEXICO. 147

The Caxteex.

One of the early troubles, which was extremely annoying, was the drunkenness, clue to the use of the native licjiior mescal by the American miners brought here. Xot being ac- customed to this drink, and not having been able preidously to get so much effect for the same money, they would absorb it too eagerly, and the result was extremely bad, since few Amer- icans who once get the mescal habit recover from it, if they remain in the country. The effect of this liquor seems to be similar to that of absinthe, affecting its victims not only physi- cally, but mentally. To combat this evil, wm not only forbade the sale of mescal on the property, and enforced this rule as rigidly as possible, but also opened a canteen,’ which was entirely in our control, and in which we allowed nothing to be sold but beer and light wines. The effect has been very good. While there is some drunkenness, it is not of the serious kind we have had before ; and the canteen, with its billiard- and pool-tables, forms a place where the men can spend their spare time.

The Water-Supply.

One of the most pressing problems in a camp of this kind, in a country where there is seldom even dew, was to get a suffi- cient water-supply. The mines, as they were opened, encoun- tered a little water; but the quantity did not increase and was not enough for boiler-supply, while the quality was not suitable for drinking.

We searched the nearest canons in the Sierra; but, while we found more or less running water in each one, they would all require expensive pipe-lines from 8 to 12 miles long, and the amount in no one case was large. We then started to develop a small spring that was already on the property, and remem- bering the Texas adage, Climb for water and dig for wood,” we dug a series of wells up the hill from the spring, and met with great success. The last well, sunk directly on top of the hill, is the best of all, and at a depth of only 45 feet has a capacity of 200,000 gallons per day. The other two wells are on independent streams, although only 150 feet away, and have a capacity of 100,000 gallons each.

We now have an adequate supply for all purposes, except irrigation ; and as irrigation would be for adornment, rather than business, we will have to postpone it for a while.

148 COAL-riELDS OF LAS ESFERANZAS, COAHUILA, AIEXICO.

The peculiarity of this water-formation is shown by our hav- ing, at the foot of this same ridge, a diamond drill-hole, 700 ft. deep, that showed no water at all

The water, though otherwise pure, contains a good deal of lime, making it hard on boilers; hut it is an excellent drinking- water, and analysis shows it to be absolutely wholesome.

We have built a stone reservoir on top of the hill, into which the pumps at the various wells throw their water, and from which it flows by gravity, through a 6-in. pipe-line, to the coke- plant, and through a 3-in. line to Las Esperanzas, the difference in elevation being about 90 ft. The hTo. 3, or Coiiquista mine, being on the same level as the reservoir, we have to ]Dump from the coke-plant what is needed there.

While the distance from the wells to the mines is two miles, we feel that we are extremely fortunate to find such a supply of pure water on the property, in a country w’-here water is so scarce as it is in this part of Mexieo.

The Mining- Development.

Three slopes were located, Nos.l, 3 and 4. Tipples were built at InTos. 1 and 3; but Ho. 4 being at the head of a ravine, it was not practicable to operate a railroad economically to that point, and arrangements had to be made to bring the coal to the tipple at slope Ho. 3, 3000 ffc. further east This was done by driving a drift on the vein from the surface-level, near the mouth of slope Ho. 3, into the hill, intersecting slope Ho. 4 at a point 400 ft. from the surface ; so that all the coal from that slope is back-switched and brought by mules to the mouth, a distance of 1500 ft From there, as the grade is about 2 per cent in favor of the loads, a hoisting-engine is used, the loads pulling the rope to the tipple, where it is attached to a corre- sponding number of empty cars, which are hauled to the mouth of the drift. The road from there to the slope is slightly in favor of the loads ; and two mules, hitched tandem, haul twenty cars each way, the loads averaging a little over one ton per car.

The slopes are all single-track, with entries turning to the right and left, 300 ft. apart. Hos. 3 and 4 are each now turning their fourth lifts ; and the output from these two slopes is now 750 metric tons per day, and should steadily increase as more

COAL-FIELDS OF LAS ESPERAXZAS, COAflUILA, MEXICO. 149

Fig. 3.

No. 1 Tipple with Cars on the Incline.

Fig. 4.

No. 3 Tipple with Cars on the Incline.

View of L<as Esi>eranzas, looking East.

Coal-Fields Op Las Espeeanzas, Coahuila, Mexico. 151

gronnd is opened and men can be obtained to fill tbe working- places.

Slope Xo. 1, at Las Esperanzas, is down six lifts of 300 ft. each, and is producing about 550 metric tons per day. "We have sufficient opening at this mine for 200 more men; and if they could be obtained, they would bring the output up to about 1000 tons per day. Fig. 3 shows the tipple at jSTo. 1.

Both iTo. 1 and No. 3 are equipped with 30 by 42 in. first- motion engines, made by the Litchfield Car and Machine Co., of Litchfield, 111., and have wood-lagged cylindrical drums, 8 ft. in diameter and 8 ft. long. These ’ull have a capacity, when the mines are fully opened, to hoist 40 tons at one time, a distance of 4000 ft. If sufficient miners can be obtained, we should have no trouble in shipping from 5000 to 6000 tons per day from the two tipples. Figs. 4 and 5 are views of No. 3.

We have also at each of these slopes an Ingersoll-Sargeant 20 by 22 in. air-compressor, furnishing air for the pumps and auxiliary hoist, used in sinking the slopes below the last lift, and also for running such air-machines as we can find runners to operate. We have nine of the air-machines of the punching type made by Ingersoll-Sargeant and Sullivan Co., but are sel- dom able to run more than four or five of them, as Mexicans do not take to that kind of work, and it is difficult to obtain Americans.

The Coal-Formatiox.

The coal in this basin is a soft bituminous (Poking coal. The following analysis was made at the No. 3 smelter of the Gug- genheims, at Monterey, from our commercial shipments to them of lump-coal :

Per cent.

Moisture, 2.0

Volatile matter, 20.5

Fixed carbon, . . 67.7

Asb, 9.8

The average section of the vein at Slopes 3 and 4, where it runs very regular, is, from the top down :

Ft In.

Coal, .10

Bone, 2

Coal, 2 6

Fire-clay, 10

Coal, .36

Total thickness, . , . . . . . .80

Total coal, 6 ft. 10 in.

Impurities, 14 in.

152 COAL-FIELDS OF LAS ESPEttASZAS, COAHDILA, MEXICO.

The great regularity of the vein is shown in the middle part- ing of fire-clay, which does not vary over 1 in. in thickness in the total workings of the mines, and shows as a white streak throughout the whole development. The roof in this mine is, however, quite bad. Above the coal there is a rotten slate about 18 in. thick, and above that 10 in. more of coal. In some places the slate hardens up enough to make a fair roof, and in others it is so soft that both entries and rooms have to be double- timbered. This adds greatly to the expense of mining, as most of the timber has to be brought from the pine-belt in eastern Texas.

At Slope Xo. 1 the conditions are somewhat different. Here we have a strong sandstone roof, which only .requires a few props in the rooms. The middle parting is not as regular, and on the south side swells up so thick as to prevent us from working the coal economically in the lower bench, and leaves us only the 4.5 to 5.5 ft. of upper seam to take out; but on the north side, after passing an upthrow of a few feet, we find the vein regular, and with the following section in feet and tenths :

Feet.

Coal, 0.9

Bone, 0.2

Coal,

Sulphur land, 0.1

Coal, 0.6

Bone, 0.3

Coal, BO

Fire-clay parting, 0.8

Coal, 0.1

Bone, 0.1

Coal, 3.4

Total 8.9

Total coal, 7.4 ft. Impurities, 1.5 ft.

Sections in some of the lower entries show a total thickness of 9.5 ft., the increase being nearly all coal. The outcrop of the vein shows a gradual increase in thickness as it goes X. W. from south of Slope Xo. 1. A hole on Telegraph Hill, one mile X. "W., shows a total thickness of 12 ft. ; and near the Mota Hill, two miles from the mouth of Slope Xo. 1, the vein shows a total thickness of 24 ft., the proportion of coal and impurities remaining about the same. The pitch at this point, however, is 45°, and the coal at the outcrop-shaft is quite soft.

COAL-FIELDS OF LAS ESPERANZAS, COAHUILAj MEXICO, 153 The Coking-Plant.

The consnuaption- of coke in the smelters of northern Mex- ico amounts to about 20,000 tons per month, and is rapidly increasing, not only by reason of additional demand from the new smelters that are being constructed in different mining fields to meet the constantly increasing output of metalliferous ore, but also from the iron-works being constructed at Monte- rey and Durango. The company therefore decided that cok- ing would be a very necessary adjunct of our business ; and we have constructed the first block of 224 ovens, and have 100 of them fired up. The remainder will be in operation about the first of next year.

The ovens are of the bee-hive type, 12 ft. in diameter, and vary only in two particulars from the Connellsville standard. These changes have been made to meet the requirements of our coal, which carries only about 20 per cent, of volatile mat- ter, necessitating that every means be used to ignite the charge quickly.

The first change was, to build an air-duct entirely around the ovens, opening at each end through the stone walls, and con- necting with the oven by small holes, a half-inch in diameter, and a foot apart. This gives a uniform supply of air to the charge, coming in over nil parts of it, whereby we obtain more uniform results than by having the only opening in the top of the door. We leave this air-duct open until the charge begins to burn freely and then gradually close it to avoid over-burning the top. Care must also be taken in studying the force and direction of the wind, so as to avoid furnishing an over-supply of air.

The second change was, to build connecting-flues 8 in. square between every two ovens and to have a damper, with a handle running above the top of the ovens.

When an oven is freshly charged, the, ovens on either side have usually been burning one or two days, and are in full heat. By opening the dampers and partially closing the top of the connecting ovens, the gases are forced into the freshly-' charged oven, and cause it to ignite about an hour sooner than when left to start itself from its own heat.

We were fortunate in finding a quarry of good rock, running from 10 in. to 14 in. thick, only a half mile from the ovens.

154 COAL-FIELDS OP LAS ESPERAiZAS, COAHUILA, MEXICO.

The fire-brick had to be all purchased in the United States, most of it coming from St Louis, Mo.

The Washer.

In order to make a coke acceptable to the smelting-trade, it was necessary to wash our slack before coking. With the un- washed slack we made a coke averaging 15 per cent, of ash; but the lead-smelters insist upon a cleaner coke than this. The problem of the washer was to remove the bony coal, which caused most of the high ash, and yet had a specific gravity very nearly the same as the coal. The various types of washers in use in the U. S. coke-fields were studied especially with re- gard to this point ; and the Campbell washer was decided upon as the simplest and most economical and still meeting the ne- cessity of delicate separation. It is a bumping-table with a curved bed and riffles, to prevent too rapid a flow. The coal and water are introduced about the middle, where the table is deepest, and the bumping motion causes the heavier particles to first settle and then travel up an incline, and oflf at one end of the table, while the coal and water pass off at the other end. The table is easily adjusted with a lever so as to make it steeper or flatter, as may be required to meet any changes in the char- acter of the material ; and it can be arranged so as to prevent any coal passing off the slate-end, or any impurities going with the coal.

This washer has been running oiiiy a snort time ; and we have not been able to have an analysis made of the coal and slate, as will be done daily, when we have the work more thoroughly sj'Stematized.

. The Washer-Buildixg.

. In order to provide for future requirements, the washer-plant was designed to handle 1200 tons of slack per day.

. The tine slack-coal at the mines is loaded in side-dump rail- road cars, which discharge freely, and is then pushed up on a trestle at the washer. The coal falls in a hopper, 100 ft. long, running under the trestle, from which it is fed into a conveyor that carries it to the end of the washer-building, where a screen- conveyor gives a regular discharge into an elevator, which lifts it to the top of the building, and discharges into a conveyor run- ning its length and emptying into a long hopper, from which

Coal-Melds Of Las Esperanzas, Goahuila, Mexico. 155

the coal feeds directly onto the washer-tables. 'We now have twelve of these tables ; but room has been left for double that number.

After passing over the tables, the coal falls into another con- veyor-line, which takes it back to the end of the building, where another elevator lifts it to the top of the 2000-ton storage-bin. It is distributed in this building by a conveyor which discharges through slide-doors in the bottom of the conveyor-trough into whichever compartment of the building it is desired to fill. There are at present three compartments, each one capable of holding a days run, so that the water is allowed to drain off for 48 hours before the coal is used.

Under the storage-bin another conveyor brings the coal to the end of the building, where it empties into a conveyor, run- ning on an incline of 30®, which takes it to the top of the larry- bin. The slate coming off* the other end of the washing-table is carried by the idle chain of the coal-conveyor to the opposite end of the building, where an elevator loads it onto railroad- cars, and it is carried to the waste-pile. A locomotive handles the larries running on a standard-gauge track, built on top of the ovens.

The conveyors are all of the double-strand Monobar type, and are extremely satisfactory for this purpose. A 20()-H.P. engine furnishes the power for the entire plant.

The water, as it drains from the storage-bin, is caught in masonry-tanks, and pumped into settling-tanks, to be used over again as soon as clean.

The analysis of the coke, as made by the Guggenheim Smelter Ho. 3, at Monterey, is as follows: Water, 0.5; volatile matter, 0.9; fixed carbon, 83.9; ash, 14.7; sulphur, 0.96 per cent.

The analysis of the ash is: Fe, 8.4; AI2O3, 17.3; CaO, 4.0; SiOg, 59.6 ; S, 1.6 per cent.

The same parties analyzed also a sample of the first coke made from our washed slack, with the following result: Water, 0; volatile matter, 1.4; fixed carbon, 87.3; ash, 11.3 per cent.

We expect to produce still better results, when the washer has been run longer and everything is moving smoothly, and more especially when the Mexican boys have learned how to keep the feed of water and coal regulated. We should bring

The Iron Mountain, Durango, Mexico.

the ash down to 8 or 10 per cent., and, careful burning, be able to make a 72-hour coke which will satisfy the most exacting demands of the lead-smelters.

These mines should be of great assistance to all steam- or coke-users in the Eepublic, especially in the northern part, as they will furnish a fuel not only cheaper than the imported article, but also having the very great advantage of being sup- plied ill regular quantities, as may be needed, thus enabling consumers to avoid the carrying of large stocks, which is neces- sary when, as now, importations by vessels are depended upon.

The present output of about 1200 tons per day is sold to railroads and steam-users throughout the Eepublic, principally, however, in the northern part. In the southern end we meet a strong competition from West Virginia coal, coming by water to Tampico and Vera Cruz. The development that has been made on this property in the last two years should con- vince anyone examining the plant that the earlier statements that there was no coal in Mexico ’’ are not borne out ; that there is enough good coal in sight to meet all reasonable de- mands of steam-users ; and that fuel fot that purpose, and at a reasonable price, is no longer one of the difllcult problems for a projected industrial enterprise to solve.

The Iron Mountain, and the Plant of the Mexican National Iron and Steel Company, Durango, Mexico.

By T. F. Witherbee, Durango, Mex.

(Mexican Meeting, November, 1901.)

The Iron Mountain, situated three-quarters of a mile NE. of the limits of the City of Durango, rises abruptly from a level plain, and trends N. 83° E. Eig. 1 gives a view of the moun- tain, with the company’s iron-works. There are indications that the vein or deposit of iron-ore extends also about two leagues across the Murca ranch, in the same general direction. The Iron Mountain proper is divided into two great lenses by a horse of cantera or eruptive rock, some hundreds of feet in width.

THE IROX MOUXTAIXj DURAXOO, MEXICO.

Tlie mass of solid ore is about 1 J mile long by J of a mile wide, and from 200 to 400 ft. liigb, the latter being the elera- tion of the cross. A conservative estimate of the amount of ore in sight, above the level of the plain, after making due allowance for the horse, is 860,000,000 tons, as shown by re- survey and measurements made during the last six months.

The ore is specular hematite, martite, or magnetite, accord- ing to locality. It is generally hard, or massive, although at the western end, at the cave, where the only mining has been done, it comes out as fine powder, or the lumps disintegrate into powder upon exposure. This powdery ore is used as fix ” in the puddling-furnaces, because of its low silica.

Physically the ore is one of the hardest and strongest rocks. It is very severe on the wearing-parts of crushers, and will cut into the face of a steel hammer, regardless of its temper.

A curious fact noted by all who have examined the deposit is that, while the massive ore and the crystals yet retain their sharp and perfect edges, lumps of iron-ore in the talus or dibris which surrounds the solid formation on all sides are rounded or nodular — the reason of which is not clear. These nodules are imbedded in a stiff clayey matrix which holds them quite firmly, so that mining with pick and shovel is sometimes profit- ably aided by explosives.

Practically all the solid ore is covered by 121 jperienencias ; 118 owned by the Mexican Ilational Iron and Steel Company, and 3 by the Flores estate. Iron-denouncements have been made outside of these limits ; but they are of little importance, as the layer containing the rounded lumps is only from 2 to 4 ft. thick, and is rapidly exhausted.

As shown by the analyses given in the appendix, the ore is very high in metallic iron, while the phosphorus runs from as low as 0.035 to more than 1 per cent.

In some places the massive ore is decidedly columnar, like basalt; and there is some evidence of its having been in a state of fusion — for instance, outlying patches of ore, from 2 to 3 ft. in thickness, evidently broken up in place, and assuming a rounded form ; also, large lumps of what appears to be solid iron-ore, which, upon breaking, prove to be only pieces of cantera covered with a superficial coating of iron oxide, often highly crystalline, and only from 0.25 to 0.5 in. thick, as though the rock had been immersed in molten iron oxide.

THE IRON MOtJNTAIiT, DURANGO, MEXICO.

Crystals are most numerous, and more perfect, next to tlie eruptive rock.

Considerable prospecting has been done on the mountain for gold and silver, and traces of the latter are ofteti found. At one place on the Jlitrca ranch, in a ledge of solid iron-ore, as much as 9 oz. of silver and 0.5 oz. of gold per ton has been found. For more than 50 years this ore has been used in a cold-blast charcoal-furnace some 7 miles away, owned by the Flores estate, and since 1888 it has been used in the furnace of the Mexican National Iron and Steel Co. Its use as a flux by the lead smelters at Monterey, Aguascalientes, Velardena, Mapimi, and other localities within reach, dates from 1893, and amounts to over 400,000 tons. Iron made from the ore with charcoal has exceptionally good chilling-qualities, which render it specially desirable for the wearing-parts of rolls, crushers, grinding-pans, quartz-mills, etc. Even the straight white iron is very strong, and, in the foundry, retains its fluid- ity like gray iron. Wlieii coke is used in the blast-furnace, a fine quality of foundry-iron, of great strength, is the result. Above 2.75 per cent, silicon the iron becomes closer in grain as the silicon increases; but its softness and fluidity are retained.

The following system of grading pig-iron is used, and has proved satisfactory when attention is paid to it, and the user knows what he needs :

Grade.

Mill-iron, .

No. 3 Foundry, . No. 2 No. 1

No. lx “

No. 3 High silicon, No. 2 “

No. 1 ‘‘

No. la;

Silicon, per cent. . Up to 1.25 . 1.26 “ 1.50 . 1.51 1.75

. 1.76 2.00

. 2.01 2.25

. 2.26 “ 2.50 . 2.51 2.75

. 2.76 3.00

. 3.01 and over.

Sulphur runs below 0.C5 per cent., and phosphorus from 0.40 to 0.65 per cent.

It will be noticed that the foundry and high-silicon brands differ by exactly 1 per cent* of silicon for corresponding grades.*

In order to show the fallacy of grading pig-iron by grain, two samples were shown at the meeting, one containing 4.32, and the other 0.75 per cent, of silicon. The average foundry man might not take either to be a “ scrap-carrier,” or, if he did, would surely choose the wrong one. Other samples of iron-ore, pig- and bar-iron — the latter bent cold — were exhibited to show the excellent q[uality of the products of this plant.

The Iron Mountain, Durango, Mexico,

Tlie Iron Mountain, Durango, MexicOj Showing Works of the Mexican National Iron and Steel CIi

The Iron Mountain, Durango, Mexico.

The blast-furnace is at the base of the western end of the mountain, and is underlain by the stratum of nodular, or loose ore, covered to a considerable depth by the clayey matrix.

The ore is hauled up an inclined plane, 180 ft. long, to a 10 by 16 Blake crusher, from wdiich it is automatically discharged into two 7 by 10 crushers ; and thence, broken to about chestnut size, as a maximum, with considerable fine ore, it falls to the stock-house floor. It is charged into the furnace by the old wa}', in barrows.

The stack has the following dimensions :

Height, 65 ft.

Diameter of bosli, 9

of crucible, 5 “

at stock- line,

of bell, ... 4

of tuyeres, 4 in.

No. of tuyeres, 4.

Blast is supplied by a vertical direct-acting Todd engine with steam-cylinder of -38 in. diameter and 48 in. stroke, and air- eylinder of 84 in. diameter and 48 in. stroke. Steam is sup- plied by 4 return tubular boilers 66 in. in diameter by 18 ft. long, and 1 125-H. P, Heine boiler. Usually, three tubulars supply sufficient steam for the blowing-engine, crusher-plant, machine-shop, blacksmith-shop, and electric-light plant. The blast is heated by one 40-pipe Cochrane stove, practically the same as the Cooper.’"’ As about 5600 cub. ft. of air pass through said stove per minute, the temperature is very low% seldom reaching 400° F.

The fuel used is charcoal, or a mixture of charcoal and coke ; the latter from Sabinas or Baroteran, in the State of Coahuila, Mexico. On charcoal alone, the blast-pressure is very high, from 6 to 12 lbs. ; but a mixture of one-quarter of Baroteran coke reduces it to 5 lbs. or less. The use of coke affords also a ready and sure means of controlling the silicon in the* ]3ig- iron.

The present furnace-stack itself is hardly up to date, being built of cut stone, some 35 ft. in diameter at the bottom by 55 ft. high (topped out with 10 ft. of iron shell), with deep, low and narrow arches, rendering it impossible to work in them just when work has to be done there. The bosh is covered by

THE IEOH MOUHTAIH, DrRAHGO, MEXICO.

a wrouglit-iron jacket, supplied with vertical cooling-pipes, wMcli, by the way, are of little use in preserving the bosh. The tuyere-section is protected by water-cooled cast-iron plates, and water-cooled square or rectangular tuyere-coolers. Iron coolers are used by preference, while the intermediate and blowing tuyeres are of bronze. The Liirmann closed cinder- front is used in two arches. The combination charcoal- and coke-furnace, which will soon replace the present one, will be from 65 to 75 ft. high, and capable of being lined to 16 ft. diameter of bosh. Much of the material for the new stack now on hand. Two C. H. Toote fire-brick stoves will be erected, 65 ft. high by 18 ft. in diameter, with a combined heating surface of 52,000 sq. ft.

The natural fuel for this locality is charcoal, which can be laid down at the furnace for less cost per ton than coke in Chicago. Limestone, both caliohe and crystalline, of good quality, is found anywhere from 25 miles out on the line of the Mexican International R. R.

The greater part of the product of the present furnace goes to the rolling-mill, about 250 ft. west of the furnace. This mill contains 5 double puddling-furnaces, a Siemens regenera- tive heating-furnace, and gas-producers ; a combination 18-in. muck- and bar-train, a 10-in. finishing-train, with the necessary complement of shears, crusher, grinding-pan, squeezer and roll-lathe. The 10-in. train turns out rounds from f to 2 in. ; squares from f to 2 in., and flats from J by up to 4 by IJ. The 18-in, bar-mill has a capacity for rounds up to 6 in., and for flats up to 8 in.

The foundry is at present only 80 by 65 ft. in size, but will soon include the space now occupied by the machine-shop, which will make it 190 by 65 ft. It has one 48- and one 24-in. cupola, and the weight of the castings made is only limited by the crane-capacity. The present machine-shop is 110 by 65 ft. in size; but a new one is to be built, measuring 250 by 65 ft., and supplied with regular and special tools for the manufacture of all kinds of mining- and milling-machinery. The present tool-equipment includes a planer 48 in. by 48 in. by 16 ft., and a lathe to turn pieces up to 10 ft. in diameter. The blacksmith- shop has 8 fires and 1 heating-furnace, with a steam-hammer capable of forging shafts up to 7 in. diameter. A 4000-lb. steam-hammer will be added to the new shop.

162 THE lEOX MOUOTAIN, DURANGO, MEXICO.

The manufacture of Hooper pneumatic concentrators is now under way, and special tools will he provided to turn them out rapidly and cheaply. A Hooper testing-plant is now in opera- tion, in which ores are tested for concentration by that system.

An interesting feature connected with this plant is the fact that, excepting heads of departments, all the labor, skilled and unskilled, is Mexican throughout. Moulders, machinists and blacksmiths are satisfactory, as is also the blast-furnace labor, including night- and day-foremen. In the rolling-mill astoiiish- iiigly good results have been obtained with such labor, after a very short time of training. The average experience of the puddlers, puddlers’ helpers, roughers, rollers, heaters and gas- makers at the rolling-mill does not exceed one year. The number of puddling-furnaces will be doubled as soon as suf- ficient labor can be educated, making the puddling-department equal to the rolling-capacity.

Appendix.

Analyses of Iron-Ore of the Iron Mountain Durango,

Si02

Percent.

Percent.

Percent.

Percent.

Percent.

Percent.

Percent.

TiOo

Ai 263

2,80

0.17

MgO

So

S

FeaOs

Fe

Mn

Loss on ign

The analyses recorded in this table have been copied from the Report of Robert W. Hunt, dated March 28, 1901, and represent different parts of the property, as follows: 1. Mass in place, on N. boundary ; 2. The cave”; 3. Drift on E. face of property ; 4. Boulders in place on Eidgely peak ; 5. The Cross (a monument erected on the summit farthest to the right in Fig. 1) ; 6. Western face of property 7. Stock-pile at furnace.

Analysis of Sabinas Coke,

Per cent.

Moisture, 0.11

Volatile combustible, 2.32

Fixed carbon, 79.00

Ash, 18.57

The Seographic And Geologic Feathres Of Mexico. 163

Analysis of Ash from Sabinas Coke.

Per cent, of Coke. Per cent of Ash.

Silica,

Alumina, .

Ferric oxide,

Metallic iron, .

Lime,

Magnesia, .

Sulphur, .

Phosphorus,

Arialysis of Baroteran Coke Unwashed.

(Iron Mountain Co.’s

Moisture,

Analysis. )

Per cent.

Volatile combustible,

Sulphur,

Fixed carbon.

Ash,

Physical Tests of Bar-Iron from Samples Taken at Random from Stock.

(B. W. Hunt’s Beport of March 28, 1901.)

Size.

0.5 in.

1 in.

1 hy 0.25

2 by 0.625

3 by 0.75

Tensile Strength

round.

round.

0.5 in. sq.

in.

in.

in.

per sq. in., lbs.

50,610

48,420

51,860

54,060

49,200

49,020

Per ct. of Elonga-

tion in 8 in., .

Per ct. of Beduc-

tion in area, .

Character of fracture fibrous in all five cases.

The Geographic and Geologic Features, and their Relation to the Mineral Products, of Mexico.

By Robeet T. Hill, U. S. Geological Survey, Washington, D. C.

(Mexican Meeting, November, ] 901.)

Physiographically, Mexico is divisible into four provinces, which are, in a manner, distinct economic areas. These may be denominated, (1) the Gulf coastal plain ; (2) the Oordilleran plateau; (3) the Sonoran, and (4) the Tehuantepecan province. Fig. 1 shows the approximate boundaries of these provinces.

The first is the continuation of the coastal plain of Texas and the Gulf region in general, which, except for prospective oil and lignite, has little of interest for the mining engineer.

164 The Geogeaphic And Geologic Features Op Mexico.

The Cordilleran Plateau province occupies two-thirds of the surface of the Republic, and is the chief seat of metallic min-

Fig. 1.

Physiographic Provinces of Mexico and the Adjacent United States.

ing. The Sonoran province is Oalifornia-Eevadan in its rela- tions, and, like the Cordilleran, is a large field for metals. The Tehuantepec province, at the sonth' end of the Eepnblic,

The Geographic And Geologic Features Of Mexico. 165

beyond tbe abrupt termination of the Cordilleras, is Central American in its aspects and relations, and will not be exten- sively discussed in this paper, which deals chiefly with the Cor- dilleran and Sonoran provinces, the chief sources of the me- tallic minerals.

1. Tee Coastal Plain Province.

The Coastal Plain province of Mexico is broken into one major and several minor divisions by the encroachment of the Cordilleran mountains upon the sea, between Tampico and Yera Cruz. The greater dmsion of the coastal plain lies adja- cent to the Pio Grande, and is the continuation of a similar feature in Texas. Small patches of the coastal plains are found farther southward toward Yera Cruz and Tobasco, and the peninsula of Yucatan is a wider expansion of it to the south- ward. The formations underlying the coastal plain are but little deformed, and are principally composed of the sands and clays of the Pleistocene, Tertiary and Upper Cretaceous forma- tions.

The coastal plain of Mexico has never been studied systemati- cally. Large deposits of maltha and asphaltum are known to occur along its western margin in Tampico. The oil-bearing formations of Texas extend into the State of Tamaulipas, with appearances of prospective value. Two flowing oil-wells are known in the State of Tobasco, and oil may occ'ur in Yera Cruz. The only Mexican coal-field of present commercial value is the Eagle Pass, on the extreme western margin of the coastal plain, adjacent to the Mexican International Eailway, near Sabinas and Baroteran. The coals are from strata of Upper Cretaceous age.

11. The Cordilleran Plateau Province of Mexico and its Accompanying Basin-Plains.

The Cordilleran Plateau province occupies the central moun- tainous area of the Republic. Although, in a broader sense, it is a continuation of the great Cordilleran system of our own country, it possesses certain marked geologic and structural differences which make it a unique and distinct province. More specifically, this province is related to the eastern ranges of the Cordilleran province of the United States; yet it is markedly different ffom them, as they are typified in the

Vol. Xxxil — 10

166 The Geogeaphig And Geologic Features Of Mexico.

Rocky Mountains of Odofado and northward. In no manner is it continuous with or allied to the California Sierras, as is sometimes supposed. In fact, the Mexican Cordilleran prov- ince is neither Rocky Mountain nor Sierra ISTevadan in its affini- ties, but rather a folded and faulted extension of the feature known in the United States as the Colorado plateau. This proposition, here presented for the first time, requires too ex- tensive discussion for demonstration at present, but will be more fully set forth in a more technical paper. It is sufficient to say now that the faulting attending the southern and eastern portion of the plateau grows in intensity together with folding southward into Mexico.

The province comjDrises a series of disconnected north and south mountain chains (separated by basin deserts) ex- tending through the heart of the Republic from justwdthin the border of the United States to south of the latitude of the City of Mexico. As a whole, it is a V-shaped area of mountainous elevation, which has been termed the Plateau of Mexico, the apex of the V pointing southward towards the isthmus of Te- huantepec, and the t-wo widening limbs extending to and just across the border of the United States. The average level of the area between the limbs is about 6000 ft. The outer coast- ward ranges, constituting the limbs of the V, are relatively higher than the general level of the area between them, which consists in itself of many long ranges separated by desert plains. The Cordilleran province, as a whole, presents steep profiles or slopes to the Gulf on the east, and the Pacific on the south and west, and a ragged sub-horizontal profile across any section from east to west. As a whole, it is of much lower altitude to the north than at its southern end. At the north, along the border of the United States — which presents the lowest altitudes of all profiles across the hTorth American Cor- dilleras — the mountain summits are not over 8000; the moun- tain passes (Paisano, Texas, and Dragoon, Arizona) 5000; and the basin levels 4000 ft. above tide. Farther south, the gen- eral altitude of the deserts and mountains rises, as along the tropic of Cancer (approximately through Victoria, San Luis Potosi and Zacatecas); the higher summits attain over 10,000, and the deserts 6000 ft. At the southern end of the province, the altitude of the general upland (not counting the great vol-

The Geographic And Geologic Features Op Mexico. 167

cailic peaks, wliich rise above 15,000 ft.) is above, and tliat of the basins about, 8000 ft.

The Mexican Cordilleran province of lost ranges and basin deserts extends but a short distance into the United States, where it is represented by the Trans-Pecos Mountain groups and deserts of Southern ISTew Mexico, so essentially different from the Plateau and Rocky Mountain country north of Santa Fe. In fact, if the international boundary had been made from the south end of the Sierra ]!7evada, along the Gila, and thence to just south of Santa Fe, it would have separated the two great nations of the continent into regions as distinct in their geographic, geologic and economic features as they now are in habits and language.

As a whole, the Mexican Cordilleran province may be sub- divided, but not sharply, into three general provinces — the two Cordilleras of generally higher altitude constituting the limbs of the Y known as the Eastern and Western Sierra Madre, and the wide expanse of mountainous plateau between them, which may be termed the Mexican Basin region.

The eastern margin of the Mexican Cordilleran plateau is a rim of mountain-crests, cumulative in altitude southward from the southern boundary of the United States and constituting a series of sierras or blocks, known as the Eastern Sierra Madre. They commence at Altuda, in Texas, on the Southern Pacific, about 100 miles north of the Rio Grande, and continue to that stream as the inconspicuous Santiago Sierra, 5000 ft. high. Across the Rio Grande, at Boquillas, it becomes the Sierra Carmen (7500 ft.); then the Frontereza, the Santa Rosa, etc., to Monterey, where the beautiful and lofty Mitre, the Silla and other members occur. Along the tropic of Cancer, between Catorce and Victoria, these mountains attain altitudes of 10,000 ft. or more.

The Mexican International railroad crosses a gap in the Eastern Sierra Madre, near Baroteran; the Mexican National climbs it between Monterey and Saltillo; the Monterey and Gulf follows their eastern foothills between Monterey and Tam- pico ; the Mexican Central, between San Luis Potosi and Tam- pico; and the two roads to Yera Cruz from Mexico give mag- nificent cross-sections of the eastern Sierra Madre.

The western rim of the Mexican Cordilleran plateau is the

168 The Geogeaphic And Geologic Eeatuees Of Mexico.

great Western Sierra Madre, a mountainous Cordillera of gi- gantic proportions, which has thus far defied the construction of latitudinal railways across the Republic. While attaining altitudes exceeding 9000 ft. onlj’ a short distance south of the international boundary, this remarkable orographic feature almost dies out at that line, north of which it constitutes the low mountains of southeastern Arizona and southwestern ISTew Mexico, of the Dragoon type, crossed by the Southern Pacific at Dragoon Summit and Stein’s Pass at altitudes of about 5000 ft, and dying out, a few miles north of the railroad, into the southern edge of the great Colorado plateau.

The configuration of the Western Sierra Madre, as crossed from east to west through Chihuahua, has been appropriately described by Kimball as a succession of narrow and continuous north and south ridges, with foothills separating broad and (longitudinally) remarkably continuous valleys. The whole surface thus characterized rises towards the west, while the mountains gain somewhat in height and the valleys in breadth in the same direction. The western slope, however, as seen from Sonora in passing from west to east, is rugged and steep ; and there is considerable evidence that this is a great faulted zone which downthrows towards the Pacific. At the tropic of Cancer the mountains are still more lofty.

Still farther southward these ranges become so merged with the southeastward-trending Eastern Sierra Madre that they are united into a continuous and complicated mass of sierras, which may be appropriately termed the region of the union of the Cordilleras. Here they present some of the most superb scenery in the world, and precipitously end to the south in Oaxaca with a great “ abfall ” or jump-off, leading downward to the Tehuantepec province.

In the region of the union of the Cordilleras are also found the superb volcanoes which constitute the crowning spectacle of Mexico’s majestic scenery. From a geological standpoint, these are veritable instances of Ossa on Pelion, for they are mountains of volcanic debris, piled upon the folded and up- lifted sedimentary rocks which constitute the greater mass of the Mexican Cordilleran province.

The central portion of the Cordilleran province — the so- eall'ed Anahuac or Plateau of Mexico — is really a region of

The Geohkaphic And Geologic Features Of Mexico. 169

basin desert-plains or bolsons’’ and elongated sierras or lost mountains.’’ These plains are deserts of various width and length, completely occupying the areas between the mountain units, being of larger area in northern Mexico than to the south. The Santa Fe and Mexican Central railways follow them from Albuquerque to the City of Mexico, and the Inter- national and ISTational railways thread great stretches of them.

This general area of Mexican deserts constitutes a basin- region somewhat analogous to, but entirely disconnected from, the Great Basin region of the United States, as found in Je- vada, Utah, Western Arizona and Southern California, with which it has been confused. In fact, the JTorth American Cor- dilleran area contains two great basin-regions, the Mexican and the Hevadan, which have no apparent connection each other. More will be said concerning the basins in our geologic remarks.

Geology of the Cordilleran Province.

The mining engineer familiar with the physiography of the l>rorth American Cordilleras in Colorado is amazed, on first glancing at the mountains of Mexico, at their entirely different relief, vegetation and general aspect. Instead of the familiar brown and red sandstones, blue shales and reddish granites, covered with juniper, spruce or pine, he sees (except in the highest altitudes) barren hills of limestone and brownish vol- canic rock, surrounded by vast stretches of cactus-covered desert.

The scenic and vegetal differences between the Colorado and the Mexican mountains, as well as the pursuits and habits of the people inhabiting them, are chiefly due to the rock ma- terial constituting the respective mountains. As a whole, the Mexican Cordilleran province consists chiefly of folded, faulted and uplifted limestones of Cretaceous and Jurassic age, accom- panied by dikes, sills and other fissure-phenomena of igneous rock. Briefly, this material is : (1) limestones, constituting the chief mass of the mountains; (2) igneous rocks protruded through the limestones ; and (3) desert debris derived from the decay of the mountains.

The mountain limestone of Mexico is nearly always desig- nated as Carboniferous, not only by the mining engineer, but by many able geologists, because it resembles lithologically the

170 The Geographic And Geologic Features Of Mexico.

blue and gray Paleozoic mountain limestones of the Appala- chian and Cordilleran fields of the United States. This lime- stone is not Paleozoic, however, but mostly Cretaceous ; and it constitutes the great silver-lead (and exceptionally the copper) matrix of the Mexican Cordilleran region. Furthermore, the mountain masses are largely of an older Cretaceous stage than the Cretaceous strata of the Colorado Rockies, which belong almost entirely below the Dakota horizon. These Cretaceous limestones constitute the summits of both the Eastern and the TTestern Sierra Madre.

Associated with the sedimentary limestones of these moun- tains, many igneous rocks occur as dikes, sills, indurated tuffs and other ejecta. These rocks (the universal “ porphyry and

granite' of the miners) are of peculiar mineral species. Throughout northern Chihuahua and Trans-Pecos, Texas, mountains of such material, which is known as cantera, may be seen. Caiitera is an altered or metamorphosed quartz-por- phyry cinder, consolidated and cemented (as noted by Kim- ball) by the influence of air and percolating waters. It oxi- dizes brown upon the surface, but is white before weathering. The city of Chihuahua is constructed of this material. To the southward the acidic fissure-eruptions of the north are succeeded by the great basic eruptions of the magnificent line of volcanoes accompanying the south end of the union of the Cordilleras.

It is useless to attempt to enumerate or describe the wonder- ful volcanic phenomena which, stretching from ocean to ocean, amaze the beholder with their grandeur and beauty. The German geologists, Felix and Lenk, have set forth at length their occurrence along lines of fissures and faulting, while Senor Ordonez, the Mexican geologist, has made some valu- able publications upon them. Orizaba, Popocatapetl, Ixtacci- huatl, Kevada de Toluca, Colima, and others, deserve each a separate volume.

The third, and not the least important, material of the Mexi- can Cordilleras constitutes the floors and margins of the great filled-in structural valleys, between the mountains, which I have termed the basin-deserts. This material, whether as the great sand-hills of the Medanos, the flour-dust of the Jiminez desert,

The Geogeaphic Axb Geologic Features Of Mexico. 171

the reddish-brown adohe or the snow-white tepetaie," is all de- rived from the decay of the mountains, and the depth and ex- tent which it attains are surprising. Its cause will presently be explained.

The complicated structure of the Mexican Cordilleras has never been worked out in detail or in its entirety. Primarily, the mountains are compressional folds, which were elevated to their present great altitude by forces as yet inexplicable and uninterpreted. The salient and conspicuous features of this structure are :

(1) The existence of folds, which, in some regions, are close and vertically compressed (example, the Eastern Sierra Madre near Monterey) ; in others, widely arched, so as to appear but slightly deformed ; and in still others, apparently tilted blocks (faulted monoclines).

(2) The apparent existence of great zones of faulting, which in some instances at least are subsequent to the epoch of greater folding, and along lines diagonal to it. Three major zones of faulting are conspicuous : the first, along the axial direction of the Eastern Sierra Madre, the detail of which has been worked out by the writer along the Eio Grande ; the second, a great zone of faulting along the southern end of the Cordilleras, which has been described by Felix and Lenk ; and the third, a supposed zone of faulting along the western base of the West- ern Sierra Madre, producing (with erosion) the western escarp- ment of these mountains.

The most interesting features of the geological structure of Mexico are the systems of faults (see Fig. 2) which have appa- rently played, in the development of the major physiographic aspects, a part so important that it may be said that all the greater aspects, such as the axial-direction of the Sierras as a whole, as well as of many of the individual ranges and desert- basins ; the direction of some of the rivers, such as the Eio Grande and Pecos, above the point of their union ; the lines of

Various local names are used for this material. sucE as caliche, Hem bhvea, etc. In southern Mexico and Central America tepetate is used for volcanic tuS and ashes.

Note by the Secretary. — Tepetate is also the common miners’ term for waste rock, or ruhhish in a mine. — E, W. E.

172 The Seographic And Geologic Features Of Mexico.

the ancient fissure-eruptions ; the direction of the coast line ; and the present arrangement of the newer volcanoes, follow in a marked degree certain major lines of faulting.

There are three great orogenic trends in northern and tropi- cal America, each representing a period of tremendous topo- grax)hic and continental evolution, to wit ; (1) the Appalachian, with axial ISTE.-SW. folds; (2) the Cordilleran, with ISW.-SE. axes ; and (.3) the Antillean, or Central American, with E.-W. axes. If the Appialachian revolution, culminating after the

Fig. 2.

Sketch-Map of Mexico, Showing Chief Zones of Faulting and Orogenic Trends.

(A, A, Cordilleran ; B, B, Antillean ; C, C, Minor Zone of E.-W. Faulting.)

CarboniferoTis period, ever affected the Mexican region, its traces and effects were obliterated by the deposition of the 20,000 ft. or more of Cretaceous strata, which still overlie the older structure. The Cordilleran revolution (at the close of theXretaceous and in Eocene time) is the one, however, which embossed upon the peninsula of Mexico the features of the present Cordilleran province. The Antillean revolution (of Miocene time) produced the trends of the southern

coast of Mexico, Central America and the Great Antilles. The great active volcanoes of southern Mexico are supposed to be

The Geographic Axb Geologic Features Of Mexico. 173

due to fissures at the crossing of the Cordilleran and Antillean trends. Surely there has been great dislocation there. A secondary line of faulting (see c e. Fig. 2) crosses the Cordilleran trend from E. to "W. along the southern edge of the Colorado plateau and through El Paso, Tex. This zone of fissuriiig, complemental to the major trend of the Cordilleran fault-axes, is inconspicuous, except that in a large number of instances the mineral veins seem to accompany these minor, instead of the major, axes. This is notably so at Sierra Mojada, Santa Eulalia, and the cinnabar mines of Texas.

While the material and structure of the mountains are im- portant factors in producing the unique scenic and economic features of Mexico, there is a climatic element which has much to do with the creation of its unique landscapes and mineral wealth. This is the different effect of the processes of solu- tion, erosion and transportation, as compared with those of more humid regions. In regions of ample rainfall (like the eastern United States) there is enough water to transport the rock-debris, and to carry the mineral solutions to the ocean. In arid regions (like Mexico), the moisture, while of greater solvent power, owing to the greater heat of the rock-surfaces upon which it falls, transports the lime in solution and the roek-dfebris for short distances only, because the run-off* is nearly always evaporated or absorbed a short distance from the place of rainfall — usually at the margin of the deserts — and the minerals are redeposited. The storm-born torrents on the mountain-top soon die upon reaching the valley’s edge, and there deposit the gravel (as talus4B>n%) and the lime-salts (as te'petate) which, in other regions, travel on to the sea.

The observer in Mexico is constantly confronted with two visible monuments of these processes — karrenfelder and te'petate, Karrenfelder are the miniature sculptures made by solution upon every limestone surface ; tepetate is a superficial deposit of carbonate of lime, from the evaporated waters. Monterey is built of it.

The chief natural resources of the Mexican Cordilleran province are its minerals. In fact, without them most of its area would be, what it is by nature, a great desert-waste ; but the existence of the mines has made possible cities, railways, and a high civilization.

Ih The Geographic A:N''D Geologic Features Of Mexico.

The chief mineral product of the Mexican Cordilleran prov- ince is silver ; it is the greatest silver district of the world, ex- cepting the United States. A little copper and some lead are found, while iron also occurs ; but all of these, except the cop- per, are accessories, usually associated with the silver-ore, which is largely ferruginous and accompanied by lead. It is not claimed that the limestone of these mountains is in any man- ner the source of the silver ; its texture and structure are the factors which make possible the deposition of the ores in such great workable quantities. Furthermore, its solubility has not only made favorable cavities for ore-deposition and replacement, but its residual iron has added to the ore-value. While the igneous rocks, which everywhere . more or less ramify through the Cretaceous limestones of the Mexican Cordilleras, may constitute the ultimate source of the metal for which these mountains are famous, the limestone itself is the favorable matrix in which the minerals are deposited by the circulating solutions. In its pockets, crevices, caverns, fissures and joint-planes are found nearly all the great lead- and silver-deposits of Chihuahua (notably Santa Eulalia), Sierra Mojada, Is'uevo Leon, Monterey, Coahuila, San Luis Potosi (Catorce and Matehuala), Zacatecas, and other places.

A brief description of two typical localities — the silver- mines of Santa Eulalia, Chihuahua, and a copper vein near Jimulco, Mexico, will illustrate the relationship between the geology and ore-deposits of the Cordilleran province.

Santa Eulalia,-T]iQ Santa Eulalia mountain, a few miles southeast of Chihuahua, is a typical lost mountain sierra, rising about 1500 ft. above the adjacent plain, and composed primarily of sub-horizontal Comanche limestone, in massive strata, aggregating about 3000 ft., mantled superficially by a lighLcolored eruptive material (cantera), usually occurring as tuff and cinder. Before the eantera was erupted the limestone mountains existed ; for the volcanic tuff fills pre-existing val- leys, and dikes of the igneous material cut the Cretaceous limestone. Furthermore, caves and fissures also existed in the limestone before it was covered by the erupted material.

While the old caverns and. fissures are often barren of ore near the surface, and the upper ores struck are impoverished (low-grade), this district is noted for the fact that deep mining

The Geogkaphic A2?I) Geologic Features Of Mexico. 17

(1300 to 1500 ft.) has always encountered rich oxidized ore of iroHj lead and silver (carbonates, sulphates and chlorides The irregular cavities in the limestone (called chimneys, etc by miners) are merely old water-courses; and it is in thes ancient drainage-ways through the crevices of the limeston that the minerals have been deposited. These crevices ar due to water, working its way along fissures, joints and bed ding-planes, all of which were enlarged by solution before th deposition of their present ore-contents. While it is impossi ble to say positively, without minute petrographic analysis, i seems very probable that some of the mineral elements origi nated by the agency of circulating waters, extracting then from the caps and dikes of igneous rocks, and redepositin| them in the old fissures of the lower-lying limestones.

The numerous bodies of silver-lead ores are all in the lime stone ; no contact-bodies, or bodies of ore within the igneou rock, having as yet been reported in the district. 'No better ex ample of the secondary enrichment of minerals by downward circulating waters can anywhere be found than here. (See p.l78.

Such is the character of many of the finest silver-lead mine in Mexico, most of which occur in the Cordilleran province In some districts, however, the ores are found on the contaeti between the lime and the igneous dikes (fissure-eruptives), or in exceptional instances, in the igneous rock.

Jbnulco . — At a mine 10 miles southeast of Jimulco (a fev stations south of Torreon) there is another interesting illustra tion of how the cavities in the Comanche limestone constitute a favorable matrix for the aqueous deposition of foreign min erals. In this case no igneous rocks whatever are known t( occur in the vicinity, either as a cap or core to the mountains nevertheless the small cavities in the limestone are filled witl high-grade copper-ores.

The mine of the Jimulco Mining Co. is situated in a moun tain range composed of Comanche limestone strata, betweei the vertically outcropping bedding-planes of which the coppe carbonate stains may be seen over a considerable area. A one place, along a fissure dipping slightly diagonal to the vei tical strata, there are great chambers, in one of which 30-per cent, copper-ore (carbonates and oxides), accompanied by ! pulverulent specular hematite (62 per cent, of iron), was found

176 The Geographic And Geologic Features Of Mexico.

Xo igneous outcrop is to be seen anwbere in tbe region ; and it is obvious that the ore could not have been derived from the purely marine limestone constituting the country-rock. Its only possible source has been circulating solutions from some concealed source within the great mass of mountains upon the edge of which the mine is situated. Copper deposits, however, are exceptional within the Cordilleran province.

III. The Sonoran Province.

The Sonoran province embraces the States of Sonora and Sinaloa west of the Western Sierra Madre, and that portion of Arizona lying south of the southern escarpment of the great Colorado plateau. Physiographically, this province is appar- ently the southern continuation of the Great Basin region of the United States as hitherto recognized, but here termed the Hevadan basin-region, to distinguish it from the great Anahuac basin, constituting the plateau of Mexico. Before presenting any opinion as final, however, it may be well to say that the region as a whole is still one of the least studied of the Amer- ican provinces.

In Mexico this province is limited on the east by the great western escarpment of the Western Sierra Madre; in the United States by the western border of the Colorado plateau. The region is distinguished by low, disconnected mountains and hills, surrounded by areas of desert, and mostly lies within 8000 ft. of sea-level. In fact, the Gulf of California is prob- ably a faulted and subsided area which was formerly a part of the Sonoran province.

Geologically, the region is quite different from the Cordil- leran province, both in physiography, material, structure, and products. Although limestones do exceptionally occur, the material of the mountains is largely siliceous, argillaceous, and metamorphic, instead of being almost entirely of limestone, as in the Cordilleran province. The volcanic materials are largely acidic (rhyolitic) tuffs and porphyries. The age of the strati- fied rocks of marine origin is also different, consisting of Archean metamorphic schists (in Altar), a little Paleozoic lime- stone (in Arispe), and Triassic, Cretaceous, and Pacific Coast Tertiary to the south. In addition to these, there are vast areas of desert-debris and plateaus of volcanic tuff. In gen-

The Geogkaphic And Geologic Features Of Mexico. 177

eral, the northern portion is composed of Paleozoic and older rocks, as in southern Arizona, although some Mesozoic rocks, as described bj* Bumble,* are found, especially to the south- ward.

In the district of Altar, towards the Gulf of California, there are many low hills and mountains of metamorphic rocks, cut by numerous quartz dikes. In other districts the country is capped by a vast thickness of sheet tufls, below which, as re- vealed by erosion (near Magdalena and Horcasitas) there is a f>lexus of intensely folded mineral-bearing Paleozoic rocks.

Mineralogically, the Sonoran province of Mexico is the cop- per-gold field of thePepublic; silver and lead being exceptional. Coal is also knowm to exist, but at points at present too remote from transportation for commercial use.

The Sonoran province is one of the great copper districts of the world. All the copper mines of Arizona: the IJnited Verde, Globe, Clifton, Morenei, and Copper Queen mines, are within this province; while, just across the line in Mexico, hTacosari and Cananea are new and important producers. In fact, the Arizona copper-district, rich as it appears, is, in my opinion, but the northern extension of a far greater prospective field in Mexico. The geology of the Arizona mines has been set forth in our Transactions by Wendt, f Douglas,| and others. It is no exaggeration to say that when the Sonora-Sinaloan copper-fields are fully developed, they will immensely increase the world’s output of copper. Continuing southward, numerous copper-prospects and claims are met with in Sonora, and far into Sinaloa and Miehoacan.

Cananea, a district about 40 miles SW. of Bisbee, is now attracting a great deal of capital and development. At this point a typical lost mountain rises above the desert. It is com- posed of a light-colored porphyritic eruptive, with some of the Bisbee limestones at its western end. Running NW.-SE. through the axis of the mountain is a great shear-zone, the cavities of which are everywhere impregnated with copper- ores — largely sulphides, although carbonates and oxides abound. A feature of this, and of the Horcasitas district, 100 miles south, is the occurrence of tremendous outcrops of iron gossan at the surface.

Trans, f xxix., 122.

t Trans, i xvii., 483.

X Tram., xxx., 191.

178 The Geographic And Geologic Features Of Jiexico.

The Sonoran province was the chief source of gold before the discovery of that metal in California. For 300 years or more, placers have been worked by dry-washing processes, notably in the Altar district. The gold is derived from the schists and quartz of the adjacent hills. The profitable gold-mines of southern Arizona all lie within this province. There are many small stamp-mills and cyanide-plants in Sonora ; but lack of water is a great drawback.

It may be truly said that nearly all the population of Sonora, west of the Sonora Railway, to-day lives by gold mining; per- haps the most primitive in the world. The placers are worked with crude dry-washers of the “ wheat-fan ” type ; the quartz- veins are mined, the ore being carried on men’s backs to the nearest water (often 20 miles distant), pulverized with a large stone in stone mortars, and ground and amalgamated in arrasim with burro-power.

rV. The Tehuantepec Province.

South of the great Abfall ending the Cordilleran province proper, the geologic and geographic relations are Central American in their aspects, consisting of east and west axes of older crystallines, and possibly Paleozoic rocks. This is the truly tropical region of Mexico and a different world from the rest of the Republic, the discussion of which belongs elsewhere. In it, Mexico has most valuable resources, which I regret cannot be touched upon here.

Postscript.

The proof of the foregoing article reached me in Mexico, where I have been making a more minute study of the Santa Eulalia district. I am convinced, as suggested by Mr. W. H. "Weed, that the cavities are largely contemporaneous replace- ment. I have also learned that at least one mine in this dis- trict has ores along a contact of dike and limestone. I hope to publish a special paper on the district in the near future.

Tb:Eatme5Tt Of Clay-Slimes By Tee Cyaxibe Pkooess. 179

The Treatment of Clay-Slimes by the Cyanide Process and Agitation.

BY E. A. H. TAYS AND F. A, SCHIERTZ, SAN JOSE DE GRACIA, SINALOA. MEX.

(Mexican Meeting, November, 1901.)

I. History.

In 1898 the Anglo-Mexiean Mining Company, Limited, pur- chased the G-uadalupe and adjoining mines, and, after opening up the Guadalupe, constructed a 20-stamp mill, which was started in August, 1894.

Although the results were extremely profitable (the ore being very rich and carrying much free gold) they were not satisfactory, because the tailings were found to average about |20 per ton in gold.’ Early in 1895 the late Mr. James E. Mills made for the company a very thorough study of the subject, and decided that the tailings could be treated most advantageously by the cyanide process. In view of this opinion, Mr. Henry E,. Batcheller, of Boston, was sent down in the winter of 1896-96 to experiment on a working scale. Mr. Batcheller was successful; and, during 1896-97, built a cyanide-plant with a capacity for treating 1500 tons per month.

This was run until May, 1899, when all the sands suitable for the process had been treated. The mill was stopped about the same time for lack of ore ; but no tailings from the mill had gone to the dump since October, 1897, as the values they contained after that date were far too low to warrant further treatment. When the cyanide-plant was stopped there still re- mained on the dump about 16,000 tons of slimes, consisting of about 75 per cent, of clay-slimes and 25 of sand-slimes. The successful treatment of this very unfavorable material is the theme of this paper. Fig. 1 is a view of the hacienda, taken in 1897.

180 treatme:st of clat-slimes bt the cyaside process.

II. Character of the Slimes.

The slimes nnder consideration comprised those naturally separated from the sands at the far side of the dump, and also those mechanically separated from the sands during the first run of the cyanide-plant and returned to the dump. Of the 16,000 tons, 75 per cent, were, as already observed, pure clay- slimes of the consistency of putty. Fig. 2 shows a bank of this material, about 11 ft. high, and showing no seams of sand. All of this material would pass through a 400-mesh screen; and, although it had weathered for five years, and still contained from 18 to 20 per cent, of moisture, at least 80 per cent, of it had been unaffected by oxidation. There was evidently an absolute lack of capillary passages in it. That material which was more or less mixed with sand-slimes, or surrounded the outer edges of the main dump, or lay in piles of clay-balls or clods, screened from the sands treated by percolation, was considerably more affected by the weathering; and the degree of extraction reached in treating it was fully 10 per cent, better than after we got well into the main pile. The remaining 25 per cent of the total consisted of sand-slimes, most of which would pass a 200-mesh screen. These wmre found in. isolated bunches above and in thin seams below the clay-slimes in the manner shown in the photographs. The original tailings were very fine, although the ore had been crushed through a screen of only 40 meshes to the linear inch. Tests made by Mr. J. A. Edmaii, of Quincy, Cal., gave : sands, 49 ; slimes, 51 per cent.* Of the sands, 10 per cent, passed over a 50-mesh screen; 30 over 50- to 100-mesh; 27 over 100- to 200-me8h ; and 38 per cent, below 200-mesh.

Of course, the slimes (51 per cent, of the total sample) were all below 200-mesh in fineness ; and it was stated that 80 per cent, of these would pass a lOO-mesh screen.

The original ore had consisted of quartz, white or reddened with iron oxide, and a lime-rock (calcite), more or less mixed with decomposed country-rock (andesite) from the walls and from fragments incased in the ledge proper. This ore carried much free gold, some free silver at times, lead and copper sul-

This sample was evidendy taken from the dump near the discharge of the launder, and was more or less washed.

Treatmet Of Clay-Slimes By The Cyanide Process. 181

pMdes carrying silver and showing much free gold, zinc- blende, copper and iron pyrites, and copper carbonates. The original ore also undoubtedly contained alumina; for aliim- iniim, which had evidently been dissolved, as well as gold, silver and copper, by the cyanide, was found by analysis in our precipitates.

The original samples of the tailings showed no trace of alumina — doubtless because they were taken, as already re- marked, from near the launder-discharge, which would natu- rally be nearly pure sand ; the slimes and clay being washed over to the far edge of the pond. Xor did those ore-samples show alumina which represented only the metal-bearing quartz. But a large part of the vein-material was replaced country- rock, with bunches of altered country-rock, all carrying gold ; and in this was found the aluminum oxide.

This ore, treated by plate-amalgamation, yielded about 72 per cent, of its gold and 45 per cent, of its silver contents, and about 1.5 per cent, of concentrates, containing most of the lead, zinc and copper sulphides and iron pyrites, and part of the iron, lead and copper oxides, and a good part of the remaining gold contents (not caught on the plates, by reason of hydrated oxide coatings or adhering particles of iron oxide and quartz).

The slimes, as run onto the dump, contained, besides quartz, clay, etc., principally ferrous and ferric oxides (constituting 80 per cent, of the mineral contents), pyrites, minute portions of lead and copper sulphides, a little copper carbonate, and about $13 gold and 1.33 oz. silver, per ton. The gold was in minute particles — under 0.0025 in. in diameter — adhering to oxides or incased in fine ‘grains of fractured quartz. The copper-content was about 0.11 per cent.

III. Experiments for Treatino the Slimes by Agitation.

After all the available sands had been treated, the question was how to recover, at as small an outlay as possible, the |200,- 000 contained in the remaining slimes. It was desired to make use of the old plant as far as possible ; and, after a couple of unsuccessful experiments, the process about to be described was tried.

In the experiments, 6 runs were made with 5-ton charges, made up half of slimes, as found on the dump, and half of

VOIi. XXXII, — 11

182 Treatment Oe Clay-Slimes By The Cyanide Process.

picked, pure clay. "We could not take into consideration, at tkat time, the fact tkat oxidation kad not been uniform through- out tke entire dump ; but we ckose tke worst combination of materials at hand, feeling sure that if good results were ob- tained from that, we should be sure of succeeding with all other mixtures.

Our experiments proved that tke mineral could be readily dissolved ; that tke KCy solutions acted rapidly on tke values contained in it ; that a good settling could be effected by the use of sufficient solution and lime; that 90 per cent, of tke values extracted could be decanted with two washes ; and that a charge could be put through in 24 hours, giving an extraction of at least 75 per cent, of the values contained, at a cost of about $5 gold per ton.

Upon obtaining these results, we were instructed to make the necessary alterations in the old plant and to proceed with the treatment of the remaining slimes.

IV. The Plant as Altered.

Of the 10 vats of the original plant, 20 ft. in diameter and 5 ft. deep, holding each 50 tons of sands, 6 were fitted up with ordinary agitating machinery, so as to be nothing more than enlarged settlers of the pan-mill type; and 4 were used as storage-tanks — 2 for the made-up solution and 2 for the decanted solution containing the gold. There was a belt elevator for raising the slimes up to a mixing-trough from which they were run to the agitators in V-shaped launders. There were also 2 solution-tanks and 4 receiving-tanks. The whole plant was run by a 60-H.P. engine ; and a 60-H.P. boiler furnished steam, not only to the engine, but also to a large pump which supplied the plant with water, 4 solution-pumps and the filter-press pump. Steam was maintained, generally, at 80 lbs. ; and, as a rule, 3 cords of wood were consumed in 24 hours.

The precipitating-room was fitted up with the usual zinc- boxes, filter-press and acid-barrels. Light was furnished by a small electric plant driven by steam. The zinc-shavings were turned on the premises.

Under favorable conditions this plant could treat 1700 tons per month; but of heavy clay-slimes only 1500 tons could be run through to advantage.

Tkbatme’T Of Clay-Slimes By The Cyaxibe Process, 183

Y. The Process.

As the slimes, for the most part, presented a stiff bank of claj from 4 to 11 ft. deep, they could not be shoveled directly into the cars, but first had to be sliced off* in very thin slices, cut up as fine as possible, and mixed with as much of the sand- slimes as could be had at hand ; after which, the material was shoveled into half-ton cars and trammed to the scales. In order to keep it as nearly uniform in character as possible, it was taken from four diff*erent parts of the dump at once.

At the scales a sample was taken from each car by running a half-round, grooved sampler, 1 in. in diameter and 5 ft. long, diagonally through the load, from one end. These samples were put into a covered tin can, and amounted, for the 100 or 116 cars treated daily, to between 55 and 60 lbs. This total was dried and the moisture was calculated before assaying. The moisture usually ran between 18 and 24 per cent. ; the latter, directly after a heavy rain ; the former, even in the driest season.

From the scales the cars were trammed about 60 ft. to the elevator-pit, under the tank-floor, where they were dumped, and thence raised to the top of the building, at the rate of about a ton in five minutes, by a belt>elevator set at an angle of about 60°. The elevator-cups discharged into a sheet-iron box- trough, 4 ft. long, 1 ft. wide on bottom, 2 ft. high at the eleva- tor-end, and 1 ft. at the discharge-end. Here the slimes were met by two streams of solution, discharged vertically downward through a 1-in. pipe at the upper end of the trough. The main solution-pipe was 2 in. in diameter; and the solution was pumped up from the lower solution-tanks and discharged under pressure. At first one jet was discharged vertically and the other horizontally against the slimes, as they fell into the re- ceiving-trough ; but we found the two vertical streams to give the best results.

From the receiving- or mixing-trough, the mixed slimes and solution were run into the agitators by means of three V-shaped launders made of 1-in. boards, 12 in. wide. These launders had a fall of 1 ft. in 6, and each fed two agitators; the material conveyed being delivered to the agitators in the ratio of 1 part of slimes to 1.5 of solution.

184 teeatme:nt of cx.ay-slimes by the cyanide fbooess.

Solution . — Tlie solution was made up in the two sump-tanks, 20 ft. in diameter and 5 ft. high, set up in a pit at a level lower than the ziiie-hoxes, and 15 ft. lower than the agitator-floor. In our tests, solutions were used containing from 0.10 to 0,30 per cent, cyanide. All gave good results, but showed a consump- tion of cyanide of from 7 to 8 lbs. per ton. This had been the case also when the sands were treated; and in the original ex- periments made by Mr. Mills it was found that, if the cyanide- process were employed, the chemicals alone would cost about 3.50 gold per ton. In our experiments, at first, we found that titrations indicated but a slight consumption of cyanide, al- though the assays showed a good extraction; but this was due to the addition of lime to the charge at the start. After- wards, when lime was added at the beginning of the last hour’s agitation, we noticed that the titration made after such addition showed from 0.02 to 0.08 per cent, higher than the titration made just’ before the addition of lime. To test what effect the lime had on the titration of the pure solution, lime was added to a sample carrying 0.30 per cent, of cyanide. After thoroughly in- corporating the lime and allowing the mass to settle, titration showed 0.45 per cent, of cyanide.

For awhile, after beginning to treat the slimes, we used a standard strength of 0.20-per-cent. KOy with good results, hut finally dropped to 0.15 per cent, which gave us the best general results, involving a steady consumption of about 7 lbs. of cyanide to the ton of slimes treated. After passing 0.20 per cent., the consumption of cyanide increased and the extraction of gold decreased. A 0.25-per-cent, solution, used for 20 days on the same general character of slimes, showed a consumption of 8.75 Ihs. of cyanide per ton and an extraction of but 74.98 per cent, of the gold and silver, while the 0.15-per-cent, solution used in the succeeding month showed a consumption of 6.21 lbs. cyanide, with an extraction of 78.56 per cent, of the gold and silver. The values of heads in these cases were $13.34 and $13.59, respectively.

Analyses of the solution showed that it carried the metals and ‘minerals shown below, and in the proportions given.

Ho. I. represents the solution as drawn off at the beginning of the decantation. Ho. II, is from the discharge of zinc-boxes when Ho. I. was supposed to be running through.

Treatment Of Clay-Slimes By The Cyanide Process.

Hacienda of the Anglo-Mexican Mining Oo., San Jos4 de Gracia, Sinaloa, Mexico, 1897.

Bank of Pure Clay-Slinies, carrying about 18 per cent, of Moisture.

Treatment Of Clat-Slimes By The Cyanibe Process. 187

Grammes per Metric Ton

Cu 422.9

Fe, nil

Al, 32.6

Zn 209.5

Ca, 458.0

Insoluble residue, 38.5

Au, 4.82

Grammes per Metric Ton,* nil

This solution had been in use for about 10 months.

Agitation . — As already remarked, the old tanks, 20 ft in diameter by 5 ft. deep, were utilized for this purpose by intro- ducing the machinery of an ordinary settler, modified to suit the use to which they were to be put. The inside cone stood 4.6 ft. from the floor of the tank, and was bolted to a f-in. plate, 3 ft. in diameter. This, in turn, was bolted to the bottom of the tank, which was 3 in. thick.

On top of this cone sat a muller with four 9-ft. arms, which were set 7 in. above the bottom of the tank, when the muller was down. To each of these arms were bolted, at an angle of 30, three wooden shoes, 6 by 8 by 36 in. in size. The outside and inside shoes had a 1-in. strip nailed to the bottom, while the center shoe was left 1 in. higher ; since we found that stray rocks, gravel, etc., gathered there, and in this way, not being caught by the arms as they revolved, did little damage. The mullers were arranged so that they could be raised 3 ft. ; and, after we got to running regularly, they made 9 revolutions per minute. At first, we had them make 14 revolutions, but soon found that speed to be too great, as it caused the charge to foam excessively, even with 3-in. wings.

At equal intervals were placed four wings, 3 in. wide, 2 in. thick and 4,5 ft, high. During the first experiments these wings consisted of 2-in. plank, 12 in. wide and 5 ft. high, hinged to the inside of the tank; to this was bolted a 4-ft. piece of 2- in. plank, horizontally, at a height that would just clear the top of the muller-arms when down and in motion. This was set at

Seceetabt's Note. — metric ton being 1,000,000 grammes, these figures can be converted to the usual form of statement in percentage by moving the deci- mal point four places to the left. Thus, o22.9 grammes per ton would be 0.06229 per cent. , etc.

188 Treatment Oe Clat-Slimes By The Cyanide Process.

any angle desired; and, when the muller was to be raised, could he turned in against the side, out of the way. But it was found to give too much resistance to the current, producing much foam. The horizontal arm was then taken off and the vertical, movable wing used alone. This was gradually swung back against the side of the tank until the edge alone offered resistance to the current. This, although but 3 in. out, was ample ; so, after that, strips 3 in. wide were screwed against the sides and used up to the end of the run.

To prove that these wings were necessary, we had one charge run without them. The outer surface of the charge rose about 12 in. higher than the center, and the general surface was smooth; whereas, with the 3-in. wings the charge was level clear across, while in motion, and the whole surface was kept in constant ebullition; the currents starting from each wing making chords subtending more than one-third of the circum- ference. That agitation was perfect was proved by numerous samples taken from the surface of a charge while in motion, and from the same while discharging from the bottom.

The Charge.-— ThQ slimes and solution, as mixed (1:1.5), were delivered to the agitators in motion, about 5 tons of clear solution having been previously charged — though this was not absolutely necessary, as the amount of solution necessary to make up the charge could he, and often was, added at the last. The aim, however, was to have the charge about as it should he at the time the last slimes were run in.

As a rule, charging occupied about 60 minutes, and there were charged to each agitator about 18 car-loads, containing in all about 11 metric tons of moist slimes and 28.5 tons of solu- tion, or a total of about 39.5 tons. This would bring the charge to within 8 in. of the top of the agitator.

The total charge thus consisted of 1 slimes to 2.6 solution ; hut since, as a rule, the slimes contained 18 per cent, of moisture, the charge was really 1 slimes (dry) to 3.4 solution. This pro- portion was observed for slimes containiug more than 75 per cent, of elay. Where there was more sand, we got an excel- lent settling with charges running 1 slimes (dry) to 2.6 solution.

The charge was agitated five hours from the time when charging began. This period was found to be ample, as the following tables of extraction will show :

Tkeatment Op Clay-Slimes By The Cyanide Process. 189

Table I. — Rate of Extraction with a Q.2Q-Per-Cent. KCy Solution.

(Charge, 10 tons slimes ; 18 tons solution. Samples every 2 h. from surface.) Test No. 2, April 15, 1900.

Hours.

Gold. Grammes per Ton.

Silver. Grammes per Ton.

Kemarks.

1.30a

a Finished charging.

3,30

7,20

Tailings.

Gold.

Silver.

Assays per Ton.

Grammes.

Grammes.

First tails discharged,

i 10.60 !

Last “ “

Average,

Extraction : Gold, 77 j

; silver.

69.57 per

6.00 j

10.80 !

cent.

5.60 :

5.40 !

It will be noted that 45.94 per cent of the gold and 47.1 per cent, of the silver had been extracted by the time the charge was run into the tank — 1 h. 30 m. ; and 2 h. later, 67 per cent, of the gold and 60 per cent of the silver had been extracted.

Table II. — Bate of Extraction with a Q,10-Per-Cent KOy Solution,

(Charge, 10 tons slimes, 60 per cent, clay and 40 sand-clay slimes ; 20 tons solu- tion. Samples every 2 h. from surface.)

Test No. 3, April 18, 1900.

Hours.

Gold. Grammes per Ton.

Silver. Grammes per Ton.

Remarks.

1.20a

a Finished charging.

Maximum extraction evidently reached. Tails assayed 4.60 grammes gold and 10.40 grammes silver per ton.

Extraction: Gold, 78.3; silver, 73.72 per cent.

f

It will be noted here, also, that by the time the charge had been run in — 1 h. 20 m. — 66 per cent, of the gold and 53.5 per cent, of the silver had been extracted. This was undoubtedly effected by running at high speed through the troughs from where slimes and solution mix, to the agitator, and by the agi- tation during charging.

l&O TREATMENT OF CLAT-SLIMES BY THE CYANIDE PROCESS.

Table III . — Bate of Extraction with a Q.M-Pei'-Cent. KCy

Solution.

(Charge, 10 tOBs clay-slimes; 20 tons solution. Samples every 2 li. from surface.) Test No. 4, April 20, 1900.

i Golf],

i Hours. Grammes

per Ton

Silver Grammes per Ton

Remarks. j

a Finished charging.

1 Tails assayed 4.20 grammes gold and 9.20

grammes silver per ton.

11.60 '

Extraction: Gold, 84,8; silver, 67.4 per

cent.

This test shows that the extraction had virtually ceased in 4 hours.

Table IV. — Rate of Extraction with a 0,22-Fer-Cent KCy

Solution.

(Charge, 5 tons clay-slimes ; 15 tons solution.)

Test No. 5, April 21, 1900.

Hours.

Gold. Grammes per Ton.

Silver. Grammes per Ton.

Remarks.

a Finished charging.

0.45a

Discharged tails assayed 3.80 grammes

gold and 8. 20 grammes silver per ton.

Extraction: Gold, 82.73; silver, 78.42 per

cent.

This charge was agitated but 7 hours from the start In 45 minutes the charge was in, and samples taken showed that 71.81 per cent of the gold and 55.26 of the silver had gone into solution. Extraction had virtually ceased' in 4.75 hours from the start. In this test two samples were taken of the tails at the same time, one to be washed and the other to be dried as it was.

The washed sample assayed, gold 3.80 grammes, Ag 8.20 grammes.

The unwashed sample assayed, gold 6.00 grammes, Ag 11.60 grammes.

This gave an actual percentage-extraction of 82.73 Au and

Treat3Iext Of Clay-Slimes By The Cyanide Process. 191

78.42 Ag, and a product obtainable of 72.72 Au and 69.47 Ag. This would show a loss of 2.20 grammes of soluble gold, and 8.40 grammes of soluble silver per ton. In the regular work the soluble gold lost was about 1 to 1.5 gramme per ton.

The above data, and others obtained from similar tests, led us, when we began the regular treatment, to agitate the charges only 5 hours.

Ijiim , — Half an hour before stopping the agitation, 5 lbs. of slacked lime was added per ton of slimes in the charge. Many tests were made with amounts varying from 2 to 15 lbs. per ton ; but we finally settled on 5 lbs. as a safe mean. That the addition of lime is necessary to produce settling will be seen later. That it aflected the solutions by vitiating our titrations has been shown. We fully demonstrated that, whether the lime was added at the beginning or near the end of the agita- tion, made no difference in the settling.

In the old treatment of the sands, so much trouble was given by foul solutions, that every few months the solution on hand had to be thrown away. We were never bothered in this way throughout the whole run of eleven months on slimes ; and we attributed this result to the use of lime, which undoubtedly promoted settling and neutralized the acidity of the slimes.

Settling , — After the charge had been agitated 5 hours it was allowed to settle 7 hours. In this part of the process we made many experiments, and were kept continually on the alert in order to obtain the best results ; since upon good settling de- pended the whole success of the treatment. Our aim was to secure a settling that would allow us to decant at least 70 per cent, of the solution perfectly clear. We found lime abso- lutely necessary with charges that were proportioned at less than 4 solution to 1 slimes. A charge consisting of 10 tons of slimes and 20 tons of solution, to which lime was not added, had not settled one inch at the end of 2 hours. A large sam- ple of this charge was taken after agitation had been started, and experimented upon by the addition of water. When the proportion of 1 slimes to 4 water was reached, settling was rapid. Acting on this hint, we made the charge 1 slimes to 3 solution and added 7.5 lbs. lime per ton of slimes. This, after agitating one hour, was allowed to settle with the following re- sults : In 1 h. it had settled 5 in. ; in 2 h., 10 in. ; in 3 h.,

192 TEEATMEIfT OF CLAY-SLIMES BY THE CYANIDE PROCESS.

12 in.; in 4 h., 18 in.; in 6 Ti., 13.5 in. ; in 6 h.$ 14 in. ; in 7 h., 15.5 in.; and in 8 h., 16 in.

In practice it would tax any plant to handle the rolume ot liquid that 1 to 4 would produce, which, with the “wash,” would be nearly 6 tons of solution for every ton of slimes treated ; hut with the judicious use of lime, as good settling as can be got from clay-slimes can be obtained with a charge not exceeding 3 solution to 1 slimes. But 25 per cent, of sand- slimes in the charge would make a great difference. Material of that character should not need more than 2.5 of solution to 1 of slimes.

We found that the pure clay-slimes charge at 1 to 2 would not settle even when 20 lbs. of lime to the ton of slimes had been added ; but when the charge was made 1 slimes to 3 solu- tion, the settling was rapid. As has been stated, our regular charge, where we used a mixture containing not more than 75 per cent, of clay, was 1 slimes to 2.6 solution ; although, at times, we had to raise this to 1 slimes to 3.4 solution, even when lime was used. Even when the clay-slimes settled, it was not very rapidly. In the 7 hours allowed they would only settle 17 inches; whereas the clay-sand slimes (70 per cent, clay) would settle from 22 to 24 inches in the same time. At the former rate of settling, but 81 per cent, of the values actually held in solution could be decanted (two decantations, as will be seen, being made from each charge), while the latter rate gave 91 per cent, decanted — a difference to be appreciated.

During the greater part of the run, when we had our average character of material, the charges would deposit as much as 12 inches during the first hour. These charges would begin settling from the moment the agitators were stopped, often settling 0.25 in. by the time the charge ceased going around.

During the last three months of the run a charge would rarely settle over 6 in. during the first hour ; and often, not more than 4 in. Even at this slow rate, the settling would reach 19 in., as a rule, inside of the 7 hours allowed.

The records of settlings from tests made at different times may be of interest (see Table V.).

During the treatment we had several chances of testing the settling-rate for 30 consecutive hours. Some of these data

Tkeatment Of Clay-Slimes By The Cyanide Peocess. 198

were unfortunately mislaid, but the following tables will give an idea of their character.

The difference will be noted in the rate of settling in the different tanks at the same time.

Table Y. — Tests of Settling with Lime.

Tat Made April 18, 1900. Test .Made April 21, 1900.

Charge: 1 slimes to 2.5 solution. Charge: 1 slimes to 3 solution. Slimes, 10 tons ; 15 Ihs. of lime to 1 ton Slimes, 5 tons ; 20 lbs. lime added per of slimes added as soon as charge was in. ton slimes.

Settling.

Settling.

Hours.

Inches.

Hours,

Inches.

0,5,

b

1,

2,

2,

3,

3,

4,

4,

5,

4.6,

6,

Decanted clear, 62.5 per cent.

7,

, 15.5

8,

Decanted clear, 85.33 per cent.

Table VI. — Jiate of Settling in Different Tanks.

(Test made March 1, 1901 j charges 2?Tos. 1022 to 1026;

first settling 31 h.,

second settling 6 h.)

Tank

First Settling.

Second Settling.

No.

In.

In.

1, -

2, .

3, .

4, .

6,

Average,

Total extraction of values held in solution by two decantations, 91.6 per cent. Ordinary decantation at the time, 86.3 per cent.

This ruu was on our most favorable material — that contain- ing at least 25 per cent, of sand-slimes ; and the charge was made up of 10.878 tons of slimes and 27.158 tons of 0.15-per- cent. KCy solution, making the proportion 1 slimes (wet) to 2.5 solution ; or (moisture being 17.6 per cent.) 1 slimes (dry) to 3.25 solution. In the first settling 5 lbs. of lime per ton of slimes was added, and in the second 2.5 lbs. per ton. Unfor- tunately the test-sheet was lost ; but the second settling shows

194 TEEATMENT OF CLAY-SLIMES BY THE CYANIDE PROCESS. Table YII. — Mate of Settling in Periods of Three Hours.

(Test made May 2, 1901 ; tanks settled for 30 h. ; rate taken every 3 h . ; material of the worst clay, nearly all clay-slimes containing, in the driest and hottest month in the year, 19.2 per cent, moisture, after having lain exposed for five years. Charge, 1 slimes (dry) to 3.3 of 0. 15- per-cent. KCy solution. Lime added : 5 lbs. per ton of slimes.)

Hours.

Tank 1.

Tank 2.

Tank 3.

Tank 4.

Tank 5.

Tank 6.

In.

In.

In.

In.

In.

In.

11 ,

14.75(?)

18,?)

19(?)

18 !

23.5(?)

; 22

' 22.5

30

At 7 hours, tank No. 1 had settled 19 in’.

Tank No. 6 had but two-thirds th regular charge. In decanting, tanks settled 0.5 in. more.

that the first had deposited at least 24 in. in the 7 h. usually allowed.

Table VIII. represents our worst work. Considering the material, the wonder is that it could be made to settle at all, with a reasonable proportion of solution.

Decantation . — After settling 7 hours the clear solution (from 14 to 18 tons) was decanted. This usually took about 1.25 hour. At first we drew off the clear solution throtigh" a double row of 3-in. holes set in “ criss-cross ” order for about 3 ft. up the side of the tank; hut, by reason of the irregular settling, we soon found that this would not do, since we often had to leave a couple of tons, or more, of clear solution in the tank. At the suggestion of our machinist, we then ran through the side of each settler, about 1 ft. from the bottom, a 4-in. pipe, con- nected it by a loose elbow at the inside end with a 3.5-ft. length of pipe, set out of reach of the arms, and kept vertical while the charge was in agitation. After settling had taken place, the stand-pipe was let down gradually into the clear solution, until this was decanted down to the slimek The 4-in. pipes from all the settlers discharged into a receiving tank set on the floor below the agitator-level. WTiile 80 per cent, of the solution

TREATMENT OF CLAY-SLIMES BY THE CYANIDE PROCESS. 195 Table VIIL — Rate of Settling During 30 Hours for Bach Hour.

(Test made June 27, 1901. )

Hours.

No. 2.

o

t

j No 4.

No, 5.

' No 6.

In.

In

In.

, In.

In

i In.

! 4.5

! 10

9.5 j

' 14.0

! 26

! 26.5

1 26,5 1

2H

' 17

These charges consisted of at least 80 per cent, pure clay, and were made up of 1 slimes (wetj to 2.87 solution. The slime-charge was 9.914 metric tons (1000 kilos) containing 16.9 per cent, moisture. This would reduce the dry metric tonnage to 8.238 (9 tons avoird.), which would make the charge 1 slimes (dry) to 3.46 solution. Even at these proportions, the nature of the material was such that settling was very poor ; barely 50 per cent, of the solution being decanted clear, after 7 hours’ settling, with the addition of 5 lbs. of lime per ton of slimes.

would run off very rapidly, the last portion (say 3 or 4 tons) drained off very slowly, and with it would come more or less fine slimes, which subseq.uently made trouble in the zinc-boxes — not by hindering precipitation, but by increasing the bulk of the precipitates, and interfering with their reduction to bullion. To overcome this difficulty, we put over the two gold-solution storhige-tanks a large settling-box, which will be described, in its place. (See Fig. 3.) From the receiving-tanks the solution was pumped up to this settling-box, whence it ran to the gold- solution storage-tanks, and thence to the zinc-boxes.

llan and Vortical Ijongitudinal Section of Bettling-Box*

196 Teeatment Of Clat-Slimes By The Cyanide Pkocess,

Fig. 3.

TKEATMENT OF CLAY-SmiES BY THE CYAIBE PROCESS. 197

When all the clear solution from the first charge had been decanted, water was charged' (agitation having been started again) in equal amount to the solution decanted, and the agita- tion was continued one hour, or for about 15 minutes after the wash-water had been charged. We used water mostly as a wash ; but when we had an excess of weak solution (that which had been through the zinc-hoxes) we used it as a wash or sec- ond solution. As soon as the wash was charged, 2.5 lbs. of lime per ton of slimes was added. This was not needed in all charges, hut to make sure, it was added, as it could do no harm. After agitating one hour, as stated, the charge was allowed to settle 6 hours, when the clear solution, usually in amount equal to the first decantation, was decanted in the manner already described.

Water was then added to the charge, in agitation, until it was thin enough to run, when it was discharged through a 4-in. opening in the side.

Discharge , — When first arranged, a 6-in. flange was bolted to the side of the agitator, so as to bring the hole on a level with the bottom. Into this flange was placed a nipple, on which was put an elbow just tight enough to turn with ease ; and into this elbow was set, at an incline of about 20, a 3-ft. length of 6-m. pipe, which discharged into a large V-shaped launder, running between the tanks, under the floor. This launder carried away the pulp.

Into the end of the discharge-pipe a big plug was driven, over the end of which a stirrup would drop, to hold it in place. This plug was secured by a chain to the floor, to prevent its being carried away by the charge, when knocked out. We soon found that the 6-in. discharge was hard to control while discharging ; so a plate with a 4-in. hole in it was bolted over the opening, inside the tank. This gave perfect satisfaction ; and 10 tons of slimes could be run out inside of 30 minutes.

As soon as a tank was discharged, water was run in and the tank washed out. About one hour was required from the time of starting to run in the water until the tank was ready for the next charge. The whole operation of treating a charge of 10 tons of slimes occupied about 23 hours. The 6 agitators would be charged by noon every day, and on. the following day each would he discharged and cleaned, ready for a new charge, about one hour before the time for charging it.

198 Treatment Of Clay-Slimes By The Cyanide Process

Tails-Samples . — About 2 ft. from the end of the discharge- lamider was a 1.5-iii. hole through the side, tapping the bottom. rive minutes after a discharge began, two tails-saniples (1 liter each) were taken at this hole: one to be washed and dried, to show total extraction; the other to be evaporated, to show actual recover} and soluble gold.

When we were experimenting we made many tests on taking tails-samples, sampling one charge every five minutes from the start to finish of discharging. These samples were so nearly uniform in value that it was seen that any one of them vrould have given practically the same results.

We also found that samples taken from the surface of the charge, while in agitation, checked well with samples taken from the discharge-launder. The agitator was always kept going until the charge was out and the tank washed.

Settling-Box , — In decanting wm could draw off 80 per cent, of the settled solution perfectly clear; but with the remainder, small thread-like streams of slimes would be carried over also ; and these, though seemingly insignificant when mixed with all the solution, sent a somewhat turbid solution to the zinc- boxes, notwithstanding the considerable settling which took place in the storage-tanks. To obviate this difficulty we put in a large settling-box, which helped matters materially. Fig. 3 shoivs the form and dimensions of this box. The solution, after decanting, as already described, was pumped up from the re- ceiving-tanks to the settling-box at the rate of about 125 gals, per minute. The discharge-end of this box was 8 ft. across, and the surface-current was nothing to speak of, up to within the last foot of the discharge; so that although the solution, run over into the storage-tank, still carried some slimes in sus- pension, the quantity was so small that a beakerful, settling over night, would show barely a trace on the bottom.

After we had put in the settling-box, we used to draw off the clear solution as close as possible, even if more or less fine slimes did come off* at the end. The whole secret of settling is : to make sure, first, that all suspended matter shall be thrown to- wards the bottom ; and, second, that the flow over the edge of discharge shall be so thin as to reduce the current to a mini- mum. The first of these objects is secured by means of a baffle-board near the intake end ; and the second, by either

Treatment Of Clay-Slimes By The Cyanibe Process. 199

governing tlie amount of liquid run through the settler or by increasing the width of the overflow so that the stream shall occupy it fully, in the thinnest of sheets.

We found that 125 gals, per minute was a little too much for even the 8-ft. discharge to handle, as the overflow was nearly 0.125 in. deep. An overflow 2.5 ft. wide was then cut on each side, at the same level as the end-overflow, as shown at in Fig. 3, a little back of the center of the box. This gave very good results, and, with the aid of other arrangements in the storage-tanks, sent the solution to the zinc-boxes with very little suspended matter.

Before the side-overflows were put in, the surface-current was measured, and found to amount to 125 gals, per min., with a velocity of 10 ft. in 6 min. from the head of the box; the next 15 ft. in 8, and the next 20 ft. in. 9.5 minutes. After the side overflows were put in, the rate and direction of surface currents were established as shown in Fig. 4.

The float for testing the currents in the settling-box was half a match, a new piece being taken at every trial.

ITo. 1, after many delays and changes in direction, went over the left-hand side-overflow in 16.33 min. hTearly two-thirds of the time was taken in covering the first third of the distance.

UTo. 2, after starting for the baffle-board, turned back and, running around the starting-point, headed for the right-hand side-overflow, going over in 8.25 minutes from the start.

ITo. 3 started at once for the righlAhand side-overflow, and went over in 3.25 min,

hfo. 4 started back towards the head, was stationary a short time, then turned and made its way, zig-zag, to the end-over- flow, going over in 6 min. from the start. There was a notable increase in speed within the last 4 in.

Ifo. 5 started straight up towards the baffle-board, but within 2 ft. from the start was caught by a slight draft and carried very rapidly about two feet farther in the same direction ; it then continued in the same course up to the first set of braces from the baffle-board. Here it turned, taking the same general direction as Ho. 1, and went over the left side-overflow in 6 min. from start.

Ho. 6 was a repetition of Ho. 5. It started straight up to- wards the baffle-board for a little over a foot ; there it wavered VOL. . — 12

200 Treatment Of Olay-Slimes By .The Cya2Tide Process.

a moment, and then headed direct for the right-hand side-over- flow, When two-thirds of the distance to this had been run, it

started up towards the head and center. When opposite the center of the right-hand side-overflow, it headed for this, but

Treatmeis'T Of Clay-Slimes By The Ctaxide Pkocess. 201

gradually swung down stream until opposite the lower end of the side-overflow, when it turned back, and when opposite the center turned and went over, in 5.33 min. from the start.

The box was cleaned out every 15 days, and the accumulated silt on the bottom was found to be rather compact, although soft, after the supernatant solution had been decanted. The accumulated slimes would amount to about 1.5 tons; and as 200 tons of solution, more or less, were run through daily, this would make the amount of slimes held in suspension equal to about one lb. to the ton. By using this box we were enabled to draw off the settled solution in the agitators much closer than we could otherwise do, and yet send the solution to the zinc-boxes carrying less suspended matter than before.

The box had a 4-in. discharge, for washing it out, in the center of the bottom, immediately in front of the baffle-board, and a decanting apparatus on one side, within 5 feet of the dis- charge-end. A 2-in. water-pipe, entering it over the side, near the baffle-board, furnished water under pressure to wash it thoroughly, after the slimes had been shoveled out.

Storage-Tanks . — Two of the original sand-tanks, 20 ft. in di- ameter and 5 ft. deep, were fitted up for storage-tanks, from which the solution was run to the zinc-boxes. These were in line, at the end of the line of tanks nearest the precipitating- room, and connected, on a line with the bottom, by a 4-in. pipe. The settling-box discharged through a 4-in. pipe into the farthest of these two tanks (Ifo. 1), the pipe being carried straight down to the bottom, and discharging horizontally to- wards the farther side. A 4,5-ft. stand-pipe, set into a loose elbow on the end of the 4-in. pipe connecting this Ifo. 1 tank with its mate, "No, 2, was arranged so that it could be lowered, when necessary, in order to drain No. 1.

In this way No. 1 became full before it discharged into No. 2. On the end of the pipe discharging into No. 2 was put a T, and a 2-5-in. stand-pipe set in this reached above the top of No. 2. This brought the air to the surface without unduly stirring up the solution discharged into No. 2. In No. 2 were fitted at intervals three 2.5-in. rubber hose, 7 ft. long, attached to a wooden float that kept the intake about 2 in. under the top of the solution, whatever its level. In this way the solution wag run to the zinc-boxes through 3-in. pipes. The bottoms of

202 Treatment Of Clay-Slimes By The Cyanide Process.

these tanks were about 8 ft. above tlie floor of tlie precipitating- roorn ; and the constant head in the pipes to the boxes averaged about 8 ft. With this arrangement the solution ran to the zinc- boxes coinparativelv clear, but not absolutely so, as it always was upon leaving the boxes. More or less fine slime was de- posited on the zinc, which increased the amount of precipitates produced and gave these a reddish color after running through the filter-press.

Zinc-Boxes , — From the storage-tanks the gold solution was run to and through the zinc-boxes. The “ first solution ’’ charge was decanted at about O.o per cent, of KCy, and the “ second/’ or wash,” at about 0.03 per cent. These were both pumped into the same storage-tanks, and contained, as mixed, between 3 and 4 grammes of gold and from 5 to 6 grammes of silver per metric ton (1000 liters); the average strength in KCy being between 0.03 and 0.05 per cent.

We had a set of 10 boxes and three barrels for holding the zinc. Of the boxes 7 were of sheet-iron ; one of wood, with five compartments, each 12 by 16 in. and 19 in. deep ; and two wooden boxes with four compartments, each 30 in. wide, 15 long and 15 deep.

The barrels were 2 ft. in diameter and 2 ft. deep, to the screen-bottom, and had 6 in. clear space between screen-bottom and the bottom of the tank. These three barrels, constituting one apparatus, were filled with zinc-shavings, about 6 cu. ft. in each, or 18 cu. ft. in the three.

The solution was delivered to the first of these barrels through a 1-in. pipe, directly in the center, running down to and dis- charging against the screen-bottom, which was of 0.25-in. mesh. It then came up through the zinc and discharged through a 1.5-in. pipe near the top, that ran over to and down into barrel Ko. 2, delivering the solution in the center and against the screen-bottom; then, rising through the zinc, discharged near the top through a l.S-in. pipe into Ko. 3, where the operation was repeated; the solution discharging through a 1.5-in. pipe from near the top into the* trough leading to the sump-tanks. These zinc-barrels were set about one foot apart, each about 8 in. lower than the next preceding, and so connected that any one could be cut out and cleaned while the others continued working. From 1.4 to 1.7 tons of solution per hour was run

Tbeatmext Of Clay-Slimes By The Cyaxide Process.

through, ghing, as a rule, almost perfect extraction. In fact, their work was just about as good as that clone by the boxes.

Each of the large boxes held 15.6 cu. ft. of zinc, and passed about 1.1 tons of solution per hour. Each of the small boxes held 10.2 cu. ft. of zinc, and passed about 0.8 ton of solution per hour. These small boxes gave us the best general results and can be recommended as a standard.

Every 4 h. 0.5 kilo (about 1 lb.) of cyanide was put into the first compartment of each box. We considered that this was beneficial, as it tended to keep the zinc sharp.’’ The solu- tion, after leaving the zinc-boxes, was conveyed to the two large sump-tanks under the floor, where it was made up into standard solution by the addition of the necessary cyanide ; and this, as needed, was pumped up to the trough, to be mixed with the slimes for a new charge.

Whatever suspended matter the solution carried was precipi- tated in the zinc-boxes. We never found it any detriment to good precipitation, except that it required clean-ups ” to be more frequent than would have been necessary with a filtered solution. The slimes left in the zinc-boxes also augmented the volume of material to be smelted, and reduced somewhat its percentage of gold.

Each box (or barrel) was cleaned in turn, once a week; and, towards the last, the head-compartment of each was cleaned out every four days and charged with fresh zinc.

We turned the zinc on the premises, making the shavings as wide as possible, but using even the fine dust (of which there was but little), care being taken to feed it with the coarser shav- ings as well intermixed as possible. The consumption of zinc for the whole run of 11 months averaged about 0,9 lb. per ton of slimes “treated. We discovered that good precipitation did not depend so much on the size as on the freshness of the zinc- shavings, In fact, we now judge that the finer the shavings the better, hut this point may he contested. That, in order to secure a perfect precipitation, the zinc used must be freshly turned, there can be little doubt As already observed, the zinc was turned on the premises. After a while, there came to be nearly a month’s supply of zinc-shavings on hand. That used daily was naturally taken from the top, and consequently was nearly always freshly turned. Every precaution being

204 Teeatmbkt Of Olat-Slimbs By The Cyanide Process.

taken to secure good. results, tke average precipitation for the first six months vas over 95 per cent. About the end of Feb- ruary the supply of zinc disks then on hand had been turned into shavings, and we began to use up the surplus pile. Within a week we had trouble with the zinc-boxes, the precipitation going, at times, as low as 81 per cent. Everything was done that could be thought of to remedy the evil, but it still continued. 'Wb noticed, however, that the box that was last charged with zinc did the worst work for that day. To- wards the end of the month, judging from the irregular results from all the boxes, some good and some exceedingly bad, we decided that the trouble must be in the zinc. The turned zinc on hand lasted just through the month, and the average precipita- tion for that month (March) was only 93.59; whereas, for the pre- ceding month it had been 97.70 per cent. The next month, start- ing on a new lot of zinc disks, we took care to turn only just fast enough, so as never to have on hand more than a day’s supply of shavings in advance, and always to use, of those on hand, the first and not the last turned. From the outset, the precipi- tation in the zinc-boxes was all that could he desired, and the average precipitation for the month was 99.22 per cent. Sam- ples of the solution were taken from heads and tails every hour ; and for the assay samples 400 grammes (about 13 assay-tons) of each w'ere evaporated, with a little litharge, on an enclosed sand- bed, heated by steam.

It would seem from this experience that, for perfect work in the zinc-boxes, freshly turned zinc is a desideratum. After a few days’ cxpo.suro of the zinc-shavings to the atmosphere an imperceptible film of oxide forms; and, although bright and fresh to the eye, offers resistance to the action of the solution. This is undoubtedly remedied by the use of lead acetate, advo- cated by some operators ; and this slight oxidation is, undoubt- edly, the cause of the need of the acetate. We had no trouble in getting a precipitation of 98 per cent., when using freshly turned zinc, from solutions running as low as 0.01 and 0.02 per cent. ECy, and carrying some suspended matter in the shape of impalpable slimes.

In cleaning out a box, all the zinc wms washed on a 0.25-iu. mesh -screen over a 30-mesh screen, and all the zinc remaining on the coarse screen was returned to the boxes, new zinc being added to complete the 'charge.

Treatment Of Clay-Slimes By The Cyanide Process. 205

The fine zinc and slimes that went through the 30-mesh screen were run through the filter-press and stored away, ready for smelting.

The coarser, which remained on the 30-mesh screen, was treated in specially prepared barrels, with dilute sulphuric acid, washed, and also stored to await smelting.

YI. Eedtjction of the Precipitates to Bullion.

The product yielded by the zinc-boxes was of rather low grade, very seldom assaying over 3.25 per cent, in gold and 4.50 per cent, in silver; but it carried from 7 to 15 per cent, of cop- per. The fine zinc, before it was removed from the 30-mesh screen, was thoroughly washed, and had the usual black color, whereas the pressed precipitates were red, and, at the first, had the same muddy consistency as the material of the tailings- dump.

Acid TreaimmL — When we started the slimes treatment, pre- cipitates and zinc were treated with dilute sulphuric acid in 2 by 3 ft. wooden barrels, 2 parts of precipitates being mixed with 1 part of zinc.

It was found, however, cheaper and more convenient to treat the zinc by itself with dilute acid (2 parts of water to 1 of con- centrated acid). After ebullition had ceased the barrels were filled with water, and the material was washed dor 6 days.

It was also noted that the use of hot water was more satis- factory than that of cold.

The following are two analyses of the material as smelted. Analysis I. represents the mixture when precipitates and zinc were being treated with acid, In Ho. II., only the zinc had been treated with acid.

Analyses of Mixed Precipitates and Zinc and of Zinc Alone,

Au,

Ag,

Cu,

Zn,

Fg2O3,

AbOs,

1/

Per cent.

Per cent.

206 Treatment Or Clat-Slimbs By The Cyanide Process.

As lias been shown, these precipitates were rather too low in grade to be smelted on the premises, especially as there were no facilities for smelting on a large scale, and also in view of the large amount of flux needed. However, constant unsatis- factory diflerenees — as high as 5 per cent, at times — in the returns from the smelting company led us to decide upon reducing the precipitates to bullion from the plant.

The furnace used for smelting was built on the principle of the bullion pot furnace, but to hold 6 crucibles, and to be fired with wood instead of charcoal, which was the available fuel for assaying and melting bars. Tigs. 5 to 8, inclusive, show the details of the construction of the furnace.

The flre-box of the one we built was somewhat out of pro- portion to the rest of the furnace, but as old materials were used for the construction, it did not seem advisable to spend much time in alterations. The front of the furnace was an old boiler-front that was lying around, and the grate-bars were the same as were used in one of the 60-E.P. boilers that ran the stamp-mill. Hotwithstauding the apparently excessive size of the fire-box, the furnace did not use a large amount of wood, and heated up rapidly and well. In melting copper, all that was necessary was to carry a heavier fire, and it did not take very long to melt 60 kilos of copper in a Fo. 50 crucible. In molt- ing precipitates, the average daily consumption of wood was 0.6 cord.

When melting was started, considerable trouble was caused on account of the crucibles being eaten through, sometimes not lasting more than one day ; and it was noticed that just the top of the slag would have the corrosive action, eating a ring about 0.Y5 in. wide through the crucible. This top layer of slag was found to be white, with a disagreeable taste ; and a few quali- tative tests showed it to be apparently a mixture of calcium and alkaline sulphates. The addition of some hematite iron-ore, which happened to be on hand, was tried and improved mat- ters considerably, having a much more beneficial effect than the addition of pieces of scrap-iron.

After long trials, the charge for smelting was finally fixed at the following mixture, in kilogrammes: 100 precipitates; 34 borax; 24 sodium bicarbonate; 5 sand; 6 clay; 3 ashes, and 5 hematite.

[Be Process. 207

208 Tkbatment Op Clat-Slimbs By The Otanidb Process.

The crucibles would be filled iu the morning and refilled, as the previous charge melted down, until in the afternoon they were finally full. In this manner 120 kg. of precipitates would be melted in from 10 to 12 hours, depending on the heat of the furnace.

The daily products were bullion, matte and rich slag.

Each crucible yielded a disk of bullion weighing from 1 to 2 kg. When enough had accumulated, these disks were re- melted and cast into bars, which assayed about .800 fine in gold and about .830 in silver, the balance being made up of copper, iron and zinc.

The matte yielded by each crucible-charge weighed about 2.5 kg. This matte was remelted at the end of each month with an excess of scrap-iron. Each crucible, nearly full of molten matte, would yield from 15 to 20 kg. of bullion, in which, however, the silver was much iu excess of the gold. Ho separate assay, however, was made, as this bullion was always mixed in with the other bullion. The final matte thus obtained was rich in copper, iron and silver, but carried very little gold. The matte ready for shipment assayed 20 grammes of gold and 84,400 of silver per metric ton.

The slag obtained from smelting was rich, running from $500 to $600 per metric ton. This slag, as it accumulated, was run over a lead bath in a Mexican vaso, which extracted between 92 and 95 per ’cent. The waste slag from this raso was not treated further, as the values were too low to warrant running it over again ; although, by such additional treatment, it could have been brought down to $2 or $3 per metric ton.

Vn. CoNomJsroNS.

From what has been written, it will be seen that we success- fully treated a materia] that offered every incentive to let it alone, had it not been for the high gold-values it contained.

A good idea of the physical character of the slimes was given by our experience as to the effect of floods upon them. Before the first flood, a rock falling anywhere on the surface of the dump would splash mud in all directions. A hog, running at full speed, jumped over the ridge, at the upper edge, one day, and went out of sight, never to appear again.

Tet while any weight would sink down through the jelly- like mass, it was of such consistency that it would stand in

Smelting-Furnace. Vertical Longitudinal

Treatment Of Clay-Slimes By The Cyanide Process. 211

banks 8 ft. liigk at an angle of 80°. When the first flood came, it went over the dam 4 ft. deep and 50 ft. wide, and in a few minntes carried away the earthy and rocky portions. This large volume of water rolled over the face of the slimes and, in the two hours it lasted at full force, did not cut it back 10 ft.

Vertical Section Througw A-B

DETAIL OF RING FOR COVER Details of Smelting- Furnace. (See Figs. 5 and 6.)

The next morning there was an excavation at the foot of the dump cut 6 ft. deep and 20 ft. across, down into the bed of the creek, in solid gravel, many of the boulders washed out weigh- ing as much as 50 lbs. A rock thrown with ordinary force against the face of the dump would sink in at least a foot. A

212 Treatment Of Clat-Slimes Sy The Cyanide Process.

man standing out on it would have sunk through to the bottom. Out back from the edge, where a stream was going over the face in a volume 10 ft. wide and a foot deep, a rock alighting would splash mud and sink out of sight ; jet the water could not cut the face back 5 ft. a day. At the next flood an im- mense volume rolled over the face to a depth of at least 4 ft., and, to all appearances, the face might as well have been solid rock; the water seemed to make no impression on it whatever.

After over a month, a steady stream and four floods had made hardly any further impression on the body of the dump. The small constant stream seemed to have greater effect than a flood ; for in the month’s time it had gradually carried back a cut some 8 ft. wide, down to the creek-bed, for about 200 ft.

The cost of treatment per ton was about gold, divided as follows :

Cyanide, 7.31 lbs., .

Per cent.

Zinc, 0.93 lbs.,

Administration and Labor,

Eoyalty,

All other expenses : Materials,

Bullion, Insurance, etc., 1.26

$4.98

Under materials are included wood, acid, and other supplies used in improvements and repairs. Of the last item, the bul- lion costs constituted about one-half, or 13 per cent, of the total costs, made up of 8 per cent, for reduction expenses and 5 per cent, for freights, duties and commissions. Uoyalty was another heavy extra expense, being 6 per cent, on the gross output.

Our total expense of $5 per ton compares very favorably with the average cost of the treatment of the sands by percolation, which was per ton.

We believe that, under like conditions, such as distance from the coast, the necessity of bringing in everything on mule-back, etc., no better can be done anywhere in Mexico. The only pos- sible further reduction in cost would be in the consumption of cyanide, and that would depend wholly on the chemical and mineral character of the ore. We could have worked to better advantage had the plant been built for the work, instead of be- ing an old plant altered and adapted, as far as possible, to the new requirements.. Three working-sheets are appended of charges at the beginning of treatment, near the middle and near the end. From these can be gained a good idea of our

Treatment Of Clay-Slimes By The Cyakibb Process. 213

systerQj time of treatment, value of slimes, and general results. It will be noticed that gradually the amount of solution charged was increased ; the amount of slimes charged was decreased, and the amount of solution decanted, in proportion to that charged, steadily decreased — notably so towards the end.

It was due to these changes alone that we were enabled to keep up the good extraction to the end.

APPEhTDIX.

The following specimens will show the nature of the obser- vations and records made in our regular practice.

Cyanide Department, Anglo -Mexican Mining Company, Limited, San Josfe de Gracia Plant.

Becord of Treatment of Charge No. 160, Tank No. 3, Sept. 26, 1900.

Date.

Time.

Hours.

Strengtli

of

Solution.

Remarks.

Sept.

A.M.

H. M.

Per cent.

2bth

Commenced charging.

Charged.

Solution charged, 25,395 liters (25.395

P,M.

M. tons).

Lime added, 50 lbs.

Agitation stopped.

f Settled 7 hours.

Decanting started.

.11*

Decanted 22 J in. 17,775 liters.

Water added, 18,170 liters.

Lime added, 25 lbs.

10.2&

,08

Agitation stopped.

A.M.

/ Settled 6 hours.

27th

Decanting started.

,08

Decanted in. 16,986 liters.

Water added and charge agitated.

Started discharging.

Discharged.

Total

Au.

Aer.

Granas Grams

Per ct. Per ct.

Au. Ag.

Total extraction,

. 86.91 68.51

Heads, 21.40 36.20

With solution, .

. 81.31 64.09

Tails, washed, 2.80 11.40

Actual extraction

. 77.98 61.21

Tails, unwashed, . . 4.00 13.00

Grams.

Soluble gold,

Moisture, 22.2 per cent.

silver, .

Metric tons, wet, 12.626.

Metric tons, dry, 9.823.

Avoirdupois tons, dry, 10.80.

Perct, Perct.

KOy confumed per ton, 5. 8 lbs.

Solution extraction,! . . . 95.9 95.6

Effects of. lime. , t inc-boxes.

214 Treatment Oe Clat-Slimbs By The Cyanicb Process.

Record of Treatment of Charge No. 832 , Tank No. 3 , Jan. 26 , 1901 .

Date.

Time.

Hours.

Strength

of

Solution.

Remarks.

Jan.

A.M.

H. M.

Per cent.

26th

Commenced charging.

Charged.

Solution charged, 27,200 liters (27.2 M.

P M.

tons).

Lime added, 50 lbs.

.11*

Agitation stopped.

f Settled 7 hours.

Decanting started.

Decanted 24 in. 17,352 liters.

2d solution added 17,352 liters.

Lime added, 25 lbs.

Agitation stopped.

A.M.

Settled 6 hours.

27tli

Decanting started.

,13

Decanted 23 in.

Water added and charge agitated.

Started discharging.

Discharged.

Cleaned.

Total

Au.

Ag.

Grams Grams

Per ct. Per ct.

Au. Ag.

Total extraction.

. 81.57 71.50

Heads, 19.00 36.00

With solution, .

. 75.00 65.30

Tails, washed, . . . . 3.50 10.25

Actual extraction,

. 73.86 63.02

Tails, unwashed, . . . 4,75 12.50

Grams.

Soluble gold,

, 1.25

Moisture, 16 per cent.

‘ silver, .

Metric tons, wet, 11.129.

Metric tons, dry, 9.348.

Avoirdupois tons, dry, 10.283.

Au, Ag.

. Perct.

KCy consumed per ton, 8.14 lbs.

Solution extraction, t . . 98.48 96.51

Effects of lime.

t Zinc-boxes.

Treatment Of Clat-Slimbs Bt The Ctanidb Process. 215

Record of Treatment of Charge No. 1695 , Tank No. 8 , Jmw 26 , 1901 .

Date.

Time.

Hours.

Strength

of

Solution

Remarks.

June.

A.M.

H. M.

Per cent

26th

Commenced charging.

Charged.

Solution charged, 29,160 liters (29.16

P.M,

M. tons).

Lime added, 50 lbs.

Loo

.09*

Agitation stopped.

f Settled 7 hours.

1 Decanting started.

Decanted 19 in., 13,737 liters.

Water added, 18,737 liters.

Lime added, 25 lbs.

Agitation stopped.

A.M.

/ Settled 6 hours.

27th .. ..

Decanting started .

Decanted 18 i in., 13,375 liters.

Water added and charge agitated.

Started discharging.

Discharged.

Cleaned.

Total

Au.

Ag. !

1 Grams Grams

Per ct Per ct.

' Au. Ag.

Total extraction,

. 84..29 58.56

Heads, 17.50 40.30

With solution,

. 77.14 48.f.4

Tails, washed, 2.75 16.70

Actual extraction

. 75.73 46.40

Tails, unwashed, . . . 4.00 20.70

!

Grams.

Soluble gold,

Moisture, 15 8 per cent.

“ silver, .

Metric tons, wet, 9.896.

Metric tons, dry, 8 332.

Avoirdupois tons, dry, 9.166.

Au. Ag.

Per ct. Per ct.

KCy consumed per ton, 7.20 lbs.

Solution extraction,! . . 97.39 95.40

Effects of lime.

t Zinc-boxes.

VOL. XXXII.— l:

Mines And Minerals Oe Duanajuato, Mexico.

Notes on the Mines and Minerals of Guanajuato, Mexico.

By William P. Blake, Tucson, Arizona.

(Mexican Meeting, November, 1901 .)

Introduction.

The ancient city of Guanajuato, the capital of the State of that name, has been built up and sustained chiefly by the min- ing industry based upon the veins of the Veta Madre and La Luz. It is distant about twelve hours, by rail, from the City of Mexico. Its elevation above the sea is about 6300 ft, and it has a salubrious climate. The population, at the date of my visit in 1891, was estimated at from 80,000 to 100,000 persons. The place is justly celebrated for the antiquity, depth and ex- tent of the mines, the magnitude of the deep shafts, and the enormous total yield of the district in silver and gold, which is comparable with that of the Comstock Lode in the United States.

Several important public institutions are located at this cen- ter. The State office for the records of claims and of the statistics of mining and production is known as the Deputacion de Mineria, The Mining College, with its tine collection of ores and minerals from the mines of the region, is highly in- teresting to mineralogists. A mint for the coinage of silver, but not of gold, coins from four to twelve millions of silver dollars annually. The silver received at the mint is melted in an open-hearth furnace, and is ladled out and cast into long and thin bars, which are rolled down to the proper thickness for the blanks. The bars contain some gold which is not parted. There is an export of dorfe bars to Germany, amounting in value to from $1,000,000 to $1,500,000 annually. There were, in 1891, upwards of forty reduction-works in and about the -city where the silver ores were treated, chiefly by the ancient patio method. In these works were 65 Chilean mills, 301 arrastres of large size, and 936 of smaller dimensions. There were 36 steam engines, but mule-power was generally used at the ar-

Mines And Minerals Oe Guanajuato, Mexico. 217

rastres, precisely as shown by Ward and others in 1825-27. In the Hacienda de Flores alone there were 40 arrastres, with from two to four mules each.

The transportation of the ore from the mines to the reduction- works is effected wholly upon the backs of mules. Long trains of muleSjheayily laden with ore in raw-hide sacks, are common daily sights in the streets of G-uanajuato and upon the roads leading to the town.

In 1891, at all of the mines about Q-uanajuato, the high-grade ores, such as yield by assay 20 marks to the arroba and upward — say 100 ounces and over to tbe ton — were carefully selected out, sacked, and shipped to smelting-works either in the United States or in Europe. The milling-ores which would not pay to ship were sent, as above, to the city, where they were sold by auction to the highest bidder and were taken to the haciendas for treatment.

The history of mining in Griianajuato dates practically from the Conquest. How long before that date silver had been ex- tracted from the upper portions of the veins by the Chichimecas and other aboriginal tribes will probably never be known. The production from the Veta Madre, or Mother Vein,” from 1766 to the time of Humboldt’s visit, with the production from 1804 to 1825 added by Ward, amounted to $225,935,736 in value.

Vein-Systems.

There are three recognized vein-systems: the Sierra, the Veta Madre, and the La Luz. The two latter have been the chief producers.

The general direction or strike of the veins is HW. and SE. There are numerous cross-veins and branches, believed to fol- low in a general way the cleavage-planes of the rocks.

The Veta Madre System.

The first shafts were commenced at Mellado and Eayaa, in 1568. Historical details of the progress of mining are given by Humboldt, Ward, Alaman, Tilmann and others. Ward, in reviewing the subject, writes in regard to the Valenciana mine upon the Veta Madre, that, after being slightly worked towards the end of the 16th century, it was neglected until the year 1760. In 1768 the mine had attained the depth of eighty meters

218 Mines And Minekals Op Guanajuato, Mexico.

and began to produce enormously. From 1788 to 1816 the production averaged in value $1,383,195 per annum.

At the date of Ward’s visit (1827), the principal mines were the Valenciana, Mellado, San Juan de Rayas, Secho, Oata and Santa Anita. At that time several shafts had been sunk — the Tiro Viejo de San Antonio; Tiro de Burgos; the hexagon shaft of 17uestra SeSora de Guadalupe; and, finally, the great octag- onal shaft called El Tiro General, commenced in 1801 and car- ried on until the beginning of the Revolution, when it had reached the depth of 635 Mexican varas.

This great main shaft upon the Veta Madre is one of the mining wonders of the world. It is eleven varas in diameter and 537 meters deep. To the depth of 100 meters it is lined with masonry; for the remainder of the distance the rocks are firm, and do not require timbering or masonry.

To those who have not visited this or other of the great mining-shafts of Mexico, the reason for their large dimensions is not at first apparent. This reason is, that many malacates or horse-whims may be worked simultaneously and independently around the opening. Around an octagonal shaft eight or more whims can be located, or they may be replaced by hoisting-en- gines. At the time of my visit in 1891, three 25-H.P. steam- hoists were in operation, and one 60-H.P. engine. Platform- cages were guided by wire-rope cables, stretched vertically from the top to the bottom of the shaft. The great cylindrical steel water-barrels were similarly guided. Two hundred and twenty-four barrels of water were raised in twenty-four hours.

The vein is described as in three distinct parts, separated by country-rock or iepeiaie and named bianco (24 meters) ; verde (15 meters), and negros (10 meters). Including the barren in- tervals, the aggregate width of the vein is 125 meters.

The white {blaico) ores shown me consisted chiefly of quartz with disseminated silver sulphide ; the black ores (yiegros) con- tained much iron pyrites, sometimes carrying argentite in small particles, and distinct crystals of argentite from the bottom of the shaft.

La Caia. — side-trail from the city winds downwards amongst the vast attle-heaps of La Oata, under ancient castel- lated walls, and towers like those of mediaeval castles, past churches with domes and spires, nestled in the ravines, with

Mines Anb Minerals Oe Otanajuato, Mexico.

picturesque villages here and there. The large heaps of refuse rock, neatly piled up and walled in, are composed chiefly of black slate, with reticulations and veinlets of white quartz in all directions. It would appear that the La Gata workings must have partaken of the nature and form of Stockwerks,

Rayas . — The largest engine seen was at Rayas. It was rated at 150 H.P., and was built at the Union Iron Works, San Francisco. It was hoisting water in buckets from a depth of 500 varas, 3 tons at a lift, 2 yards per second; wood being used for fuel. Coal, from Chihuahua, costs $22 per ton, but is not so good as the coal from Uew Mexico, which costs $20 by rail to Marfil. There is no large pump on the lode.

The main shaft here is octagonal, and is even larger than the shaft at the Yalenciana, being, according to Ward, two and a half varas greater in diameter. The dimensions stated to me in 1891 were: diameter, 12 meters; depth, 400 meters. It was then filling with water in the lower portion. The depth in 1827 was 450 varas. Ward also cites the fact that one of the malacates at that time was the largest ever built in America, the winding-drum being 8.5 varas in diameter, and the beam 24 varas in length. It was worked by 8 horses, changed every three hours.

The La Luz System.

In going about 5 miles southward from Q-uanajuato, to La Luz, the following mines are passed in succession :

San Bernabe, San Jose de los Muchachos, El Refugio, La Trinidad, Jesus Maria, Santo Uino, San Pedro, Melladito, La Luz, Santa Clara, San Vicente, Los Locos, Sangre de Cristo, La Purissima, St. Mcholas, Bolanitos.

Shafts and dump-piles of waste and ore show the wide ex- tent of the underground work, and the great activity of mining in the past; but at the time of my visit in 1891 very little work was in progress, and that chiefly for the purpose of holding the claims under the law ; the proprietors hoping for some develop- ment or deep tunnel for drainage of the lower levels, then flooded with water. Bolanitos and Melladito, a short distance east of the town, and the vein of La Luz, were producing largely, and also La Purissima ; the water being kept out by hoisting it in the primitive Mexican fashion with large sacks of raw-hide.

220 Mines And Minerals Op Guanajuato, Mexico.

The aggregate product of this La Luz series of mines appears to have been considerably over $800,000,000 in value, exclusive of the San Bernabe, known to have been a large producer. The following tabular statement was officially prepared to ac- company a map and section of the mines of the district, shown at Paris in 1889 :

Mines.

Opened.

Depth.

Meters.

Working-

Depth

Meters

Known Product. (Value.)

La Luz

1140,000,000

175 '

20,000,000

Santa Clara

17,000,000

Eefugio.

23,000,000

San Vicente

27,000,000

La Trinidad

J861

6,000,000

Los Locos

860,000

Jesus Maria

16,000,000

Villarina

3,000,000

Ei Santo Nino

9,000,000 :

La Purissima

25,000,000

San Pedro

14,000,000

San Nicolas

12,000,000

In 1889 the annual yield was officially reported to be 17,700 tons of silver-ore, from which 24,000 kilogrammes of silver and 90 kilogrammes of gold were extracted. This would corre- spond to 576,000 oz. of silver and 2160 oz. of gold, the total value of which would be about $619,200. The average value of the ores according to these figures was about $36 per ton.

The general direction of the La Luz vein is about 55°— 60° W., and S. 56°-60° E,, but it cannot be definitely traced beyond the El Carmen opening, where the vein is believed to cross the La Luz branch of the San Bernabe river. There are several intersecting veins. By some, the vein, here called La Luz, is called the Plateros. Prof. P. Aguilar regards the inter- secting veins as probably following the cleavage-planes of the clay-slate country-rock.

The chief vein-stone or gangue of these veins is a compact white quartz, with some calcite carrying argentite, pyrargyrite,, stephanite, polybasite, miargyrite, and sometimes a little cinna- bar. There is a considerable amount of finely disseminated iron pyrites, and there are small quantities of galenite. At Bolanitos the chief silver-mineral is the simple sulphide of silver (argentite).

Mines And Minerals Oe Guanajuato, Mexico. 221

The choicest crystallized silver-minerals now in the public and private collections in Mexico were supplied from the mines of the La Luz system. One mass of very fine crystals of silver- ore, in the State collection of Guanajuato, weighs several pounds and is without gangue. A fine mass of ruby silver-ore, weigh- ing 25 lbs., was sent to the City of Mexico by Maximilian. The Refugio mine has yielded some of the most beautiful pink and white apophyllite crystals ever seen.

The width of the lode in the workings upon La Luz is vari- able. It is reported as from 4 to 20 meters. In one place in the San Miguel, a portion of the vein has been broken up and re-cemented, forming a brecciated mass.

At the mines of the La Luz system, from one end of the line to the other, there are large heaps of second-class ore and refuse rock. These heaps are mines of wealth to the poor people. Men, women and children are constantly at work dig- ging over these piles, and gleaning from them small quantities of ore, a few ounces or pounds, which they are allowed to take away and sell by paying a small sum daily for the privilege of working on the ground. At the La Luz, where a large portion of the refuse-heap has been washed away by the rush of waters, and spread along the channel of the creek for a mile or more, there were at the time of my visit many groups of men and women diligently seeking for bits of vein-stone, out of which they might break a few grains of salable ore.

Persons familiar with the La Luz mines (including the very competent authority, Ignacio Olmeda, who has been connected with them since the opening of the great bonanzas in 1840), concur in the opinion that there are now large quantities of second-class ore left behind in the mines, that would not pay to extract, send to Guanajuato and reduce by the patio process, but would pay a good profit if they could be milled near the mines by modern methods, being estimated to be worth not less than four marks of silver per monton equivalent to 32 oz. per 3200 lbs., or 20 oz. per ton. Owing to the absence of water; the ores cannot be worked at the mouths of the mines.

Bolanitos Mine , — In 1891 the Bolanitos was in bonanza and was actively worked by Sr, Don Andrade, of the City of Mexico. It is less than a mile, in a straight line, from La Luz. It was an abandoned mine as late as 1883, when it was reopened and worked with great success and profit, having produced in seven

222 Mines And Minerals Op Guanajuato, Mexico.

years not less than $3,000,000. Modern machinery and methods are used. The main shaft is 20 ft. in diameter, and has steam-hoists on opposite sides.

The Victoria Tunnel . — The project of this name was based on concessions from the Mexican government prior to the year 1901. It contemplated a large drainage-tunnel, aftbrding also ventilation and transportation for the whole series of mines of the La Luz system. It was to be 1800 meters in length from the mouth of the tunnel on the San Bernabe river or creek to the La Luz mine, which it would cut at a depth of about 300 meters. The lower levels of all the mines are flooded with water. The drain-tunnel would drain off some 300 ft. of this water, and give access to a large amount of unexplored ground. It is projected to run on a straight line from the canon of San Bernabe to the bottom of the Arcangel shaft at a depth of 300 meters from the collar. A tunnel called the San Bernabe drains the La Luz to a depth of about 650 ft.

The Eock-Formations.

The rock-formations from La Luz to San Bernabe canon are metamorphic clay-slates, quartzites and conglomerates. In some places the rocks are dioritie, either from metamorphism or by reason of the intrusion of dikes. All the formations are uplifted, and are flexed and contorted, so that the dip is vari- able. There is abundant evidence of pyritic mineralization, the rocks being everywhere rusty and red at the surface.

The Minerals of Guanajuato.

There is a fairly complete representation of the ores and minerals of the district in the Museum of the School of Mines, in the several private collections at the larger haciendas, and in the homes of the leading mining engineers.

Ruhy-Silver (Pyrargyrite or Proustite). — A mass of ore, re- ferred to as “ ruby-silver,” was sent from the La Luz vein by Maximilian to the City of Mexico, and is stated to have weighed 25 lbs. I saw in the museum fine crystals of p)yrar- gyrite an inch long.

Argentite . — Perfectly formed crystals of large size are in the State and private collections.

Aguilarite, a sulpho-selenide of silver, occurs here in skeleton dodecahedral crystals in the San Carlos mine, but is very rare.

Mines And Mineeals Of Guanajuato, Mexico.

It was described by tbe late Dr. F. A. Gentb in the Amer. Jour, Sci. 41, 401 (1891), and was nanoed in honor of Prof. Ponciano Aguilar, of Guanajuato.

Stephanite, Polybusite Miargyrite and Cinnabar also occur in the mines.

Apophyllite.—ludi.Tg% finely formed crystals, white and rose- colored, from El Pefugio.

Calcite, — Brilliant, highly modified crystals, and twin crystals of great beauty.

Map and Section.

In 1883 the Mexican government appointed a commission of engineers to prepare a profile-section and a map of the mines upon the Veta Madre and the La Luz vein, for exhibition at New Orleans in 1883, and again at Paris in 1889. This special commission was formed by the appointment of the eminent mining engineers Srs. Francisco Glennie, Ignacio G. Eocha, Ignacio Ibarguengoitia, Juan N. Contreras and Ponciano Agu- ilar, all officially identified with mining in that region. The immediate and detailed work of compilation and drawing was entrusted to Prof. Aguilar, who was aided by the engineers of the various mines, and by the official records and maps of the workings on each of the different properties. The section is beautifully drawn and colored. It is nearly 30 ft. long, and cost the State of Guanajuato more than $3000.

Bibliography.

Reference is made to the following works :

Humboldt, Alexander von. — New Spain.

Ward, H. G. — Mexico in 1827. London, 1828. (Yol. II., pp. 426 to 428 and 440 to 463.)

Alaman. — Historia de Mijico (5 vols., 1849-1852).

Tilmann, E. — Der Bergbau und das Amalgamations- Yerfoh- ren in dem Bergwerks-Distrikte von Guanajuato in Mexico mit spezieller Beschreibung der Werke welche das JSaus der Senora Dona Frandsca de P, Perez Galvez in Demselben betreibL Nach dnem vom KonigL Preuss, Berg-Ref erendar Herm E, Tilmann gear- beiteten Manuscripte, Munster, Aschendorff’sche Buchdruck- erei, 1866. (4to., pp. 74, with maps and sections.)

Aguilar, P. — Report on the Mines of La Luz Group. Vic- toria Tunnel Co. [Translation.] February 28, 1893. Pamphlet.

Blake, W. P. — Mines of Guanajuato, Proposed to be Drained by the Victoria Tunnel Co. Pamphlet. New York. March, 1893.

The Mining District Of Pachuca, Mexico.

The Mining District of Pachuca, Mexico.

By Ezequiel Ordonez, Subdirector In8Tituto Geologico, Mexico.

(Mexican Meeting, November, 1901.)

L General Description.

The two mining districts of Pachuca and Real del Monte, well known for their antiquity and the extraordinary richness of their veins, are situated, 8 miles apart, only 62 miles north of the City of Mexico — the first being on the western, and the second on the eastern slope of the Pachuca range of mountains which bounds the great valley of Mexico.

Close to the celebrated mining region of Pachuca is located the city of the same name, capital of the State of Hidalgo, at 2460 meters above sea-level and 20® 07' 35' ’North, latitude, with 35,000 inhabitants, the majority of whom work in the mines ; the remainder being Government employees, mer- chants, and a small number engaged in less important indus- tries.

The city extends along both sides of the canada which car- ries the waters of the river called ‘‘Avenidas de Pachuca, the banks of which are united by four bridges at regular in- tervals.

The attention of the traveler approaching the city is first attracted by the appearance of the mountains, barren of vege- tation, bounding the city with rocky cliffs and steep declivi- ties, the grades of which serve as foundations to the irregular and varied groups of houses. Above these are the dumps, and, close by them, the mouths of the shafts, covered with conical tile roofs. The smoke of the chimneys, the noise of the mills and the appearance of some of the constructions reveal at first glance the industrial character of the place. At the left of the entrance to the Canada, the mountain of San Cristdbal, cele- brated for the famous vein of Xacal, one of the richest and earliest exploited in the district, rises 450 meters above the city.

The Mining District Oe Pachuca, Mexico.

Pachuca possesses a Scientific Institute, where students, mostly natives of this State, receive a technical education as mining engineers, topographers, assayers and refiners. (Diplomas were formerly given in law also.) This Institute is also pro- vided with a cabinet of philosophical instruments, a chemical laboratory, a library, a meteorological observatory and a small museum of natural history furnished with collections of min- erals for the use of the students. The spacious building is located on the slopes of San Cristobal mountain, and was for- merly a Catholic church and convent.

Por years the practical Mining School has been established at Pachuca, where the students from the Engineers’ School of the City of Mexico (formerly called School of Mines) have ac- quired practical and professional training. Most Mexican mining engineers of the present generation have been trained at Pachuca, more on account of the great variety of machinery in the several mines and milling plants located there, than the conveniences offered by the school.

The city contains some other important buildings, erected in the midst of the humble and monotonous construction of houses hurriedly built, when mining prosperity was at its zenith, to satisfy the urgent necessities of the rapid increase of population. Some of the large edifices are worthy of mention. For instance, the Safes and Keal del Monte and Pachuca Co.’s manager’s office, an old Spanish structure, erected in 1670 by the Marquis of Mancera to encourage mining, for it was both a quicksilver-market, to supply miners at reasonable prices, and a place for keeping funds for buying ores as well as for paying taxes to the Crown.

The topographical conditions of the town-site explain the lack of regularity in the structure of the houses as well as the laying out of streets and avenues. The city is traversed by three main avenues, intersected by cross streets, the majority of which are treacherous narrow paths leading up the hill- sides.

The Government Palace is remarkable for its solid construc- tion, uniformity and good proportions of its faQade. The modern structures in different portions of the city bear a more grand and elegant style. Among these the Santa Gertrudis Mining Co.’s offices deserve special mention ; also Grenfield’s

The Mining District Of Pachuca, Mexico.

hotel, where visitors can find comforts of all kinds, which is situated in front of a square and on the same spot where the stage-coach depot used to be ; also the manager’s office of the San Eafael Co. and the Red House, occupied at present by the Justice Court. The last-named building was erected at the end of the 18th century by Count Eegla, to furnish work for the poor starving people. It has been greatly improved since. The city also has two Catholic and two Methodist churches, the latter usually attended by Eorth Americans, and by English miners, mining carpenters and mechanics, most of them from the County of Cornwall.

There are also two public gardens ; a statue erected to the memory of the parish priest Hidalgo, first leader of Mexico’s independence, from whom the State of Hidalgo takes its name ; a theater, recently constructed, which shows a handsome fa 9 ade; and some private residences of recent construction. In the outskirts and within the boundaries of the city may be seen the mills where the ores extracted from the mines, espe- cially those too low in grade to he profitably exported, are treated. In these days, the exportation of ores is very im- portant. The principal mills in operation at present are those of Loreto, Purissima Chica and Progreso to the north of the city, and La Union, Cuervito and Guadalupe at the entrance of the city from the valley, and Bartolome de Medina.

During the busy hours of the day when the mines arc being worked there is not much traffic in the streets, miners having to walk from four to six kilometers early in the morning to reach the mines, returning in the evening. There is an unusual degree of animation on Sundays, especially in the market squares, furnishing an opportunity to study the popular cus- toms, which are very similar to those of all Mexican mining towns. Miners spend on Sundays, in buying provisions and enjoying their favorite amusements, such as hull fights, etc., the greater portion of the earnings of the week.

II. History.

The mining district of Pachuca has been known since the remote days of the Conquest. All historians fix as the date of its discovery the year 1522, scarcely two years after the Conquest of Eew Spain was consummated by Hernan Cortes.

The Mining District Oe Pachuca, Mexico, 227

Some persons are under the impression that the mines had already been exploited by the Aztecs before that time. There is no written testimony to prove this ; and it may be that the excavations made by the Indians in the beautiful place called Las Navajas were supposed by early observers to be metal- mines. They were, in fact, quarries from which obsidian was extracted by the aborigines to manufacture the lance-points, knives and other utensils so much admired by historians, archae- ologists and ethnologists. These excavations, though now almost completely destroyed, can be recognized on the slopes of the mountains not very far from a town called Pachuquilla, which, according to Humboldt, was the first Catholic one set- tled by Spaniards in the Intendmcia de Mexico.

The etymology of the name of Pachuca is not well known. Father Baltazar de Medina derives it from the Indian word Pachoa which means closeness or narrowness, in reference to the narrow ravine between mountains, which forms the en- trance to the city.

It is impossible now to trace the exact history of the mining development of this district, because the city records and offi- cial documents kept in the convents were destroyed during the war of independence and other internal revolutions. It is only known that one of the veins first discovered and exploited was the Xacal, the outcrop of which projected from the slope of the Canada of Pachuca at a place where old open cuts and work- ings now give evidence of former operations.

After 1557 the mines of Pachuca won their celebrity through the impulse given to their exploitation by the fortunate inven- tion, in that year, of the patio process for the reduction of ores, made by a miner named Bartolome de Medina. It is stated that this discovery took place where La Purissima Chica mill is now situated, near the San Juan mine at the terminal depot of the Pachuca street-car line and about seven minutes’ ride from the city. As a consequence of that improvement the mines were worked more successfully during the XVIth and XVIIth centuries, with ups and downs occasioned sometimes by the monopoly of quicksilver achieved by the Crown of Castile.

In 1670 the Royal Safes were established, where quicksilver was sold. At this time the Xacal mine alone yielded $7000

The Mining District Of Pachuca, Mexico.

per day, the Bncino miae 240,000 ounces of silver per annum, and La Trinidad, during ten years and with a force of 1000 men, produced about |40,000,000.

In 1700 a terrible fire destroyed all the works at the Encino mine, burying numerous victims. This unfortunate accident coincided with the decadence of the district, so noticeable during the XVIIIth century, which was caused by the impos- sibility of draining the mines to any great depth.

To control at that time this element, which has always been the cause of serious trouble, they had to increase the means of pumping, and to employ animal power, a fact which was always a barrier to exploitation.

In spite of these obstacles, some of the mines resumed their work at a shallow depth and on a small scale, and continued it until the beginning of the war of independence, when all work was completely paralyzed — the greater part of these mines having been owned by the Spaniards. In 1812 the insurgents pillaged the Royal Safes and stole the records from the files. This paralysis lasted until 1824, when the third Count of Regia and a celebrated English miner, who had organized a company in London, continued the work, not, however, without serious difficulties and accidents, and heavy expenditures. Machinery for draining the mines (the transportation of which at that time was very difficult) ; the purchase of mines in bad condi- tion ; and the construction of expensive buildings, were among the items of outlay. Rich ores were the only available ones ; the salaries of the technical clerks were high ; the dead-work was large ; and the administration was complicated. The re- sult of these causes was the ruin of the company, which was dissolved in London in 1848 with a deficit of |5,000,000 and a total loss of more than |11,000,000.

In a short time a new company was formed, and resumed work on certain mines, among which was the “ Rosario ” (still worked). On the continuation of the famous vein Xacal, at the conjunction of the two branches, this company immediately discovered abundant and rich ores. In the San Xicolas shaft on the same vein and in the region of the bonanza, they installed in 1863 a balancing pump which permitted the work to reach a depth of 200 meters, continuing along the bonanza. Imme- diately afterwards work on the Xacal mine was continued,

The Mining District Of Pachuca, Mexico.

giving excellent results in 1863. After this timOy the number of producing mines on different veins augmented progres- sively; and in 1895 this district became one of the most im- portant in the Iew World for its enormous production.

About 1879 the Santa Gertrudis bonanza vas discovered, producing unusual excitement in mining circles in that locality and a rapid increase of population, which was accentuated by work on a new bonanza at San Rafael mine, actively pushed since 1883. These mines yielded in less than 25 years about two million tons of ore.

The exploitation of these immense bonanzas resulted in the completion of the Hidalgo railway, which gave Pachuca direct communication with the capital of the Republic. A little later, two new lines were opened to the public, a branch of the Vera Cruz railway and also the Mexican Centra], assuring di- rect communication with the Gulf of Mexico and the United States. The flourishing condition of Pachuca was abruptly in- terrupted at the close of 1895 by a disastrous inundation in the canons of the Vizcaina vein, which soon invaded the works of the other mines. The fatal results of this unfortunate circum- stance have exercised a powerful influence on the mining affairs of the district ; and since that date the decadence of Pachuca has been manifested by the diminution of the Government in- come and taxes, dullness in commercial affairs and decreased activity in the mills.

The principal mining companies at present established in Pachuca are the Real del Monte and Pachuca Mining Com- pany (the largest one on account of the number of mines which it has in operation and its important management), the Santa Gertrudis, Maravillas and San Rafael Mining Companies.

Pachuca occupies the first place in the mining districts of Mexico on account of its variety and amount of machinery, number of draining-plants, different milling-plants, and its electric power recently inaugurated. It is also remarkable for its numerous shafts, extensions and methods of working. Its drifts, excavations and cuts represent not less than 300 kilo- meters in length. According to a rough calculation recently made, Pachuca has produced since its first discovery more than 3,500,000 kilos of silver.

The Mininh District Or Pachuca, Mexico.

III. Topography.

The Pachuca range of mountains, on the slopes of which lies the city of that name, forms the northeastern boundary of the Valley of Mexico, and is considered as a branch of the eastern chain of the Sierra Madre. The crest of the moun- tains extends approximately NW.-SE. The attention of the traveler has always been attracted, not only by the extraordi- nary abundance and richness of the mineral veins (of which Pachuca district contains only the smaller part), but also by the beautiful variety of the mountains, either covered with exuberant alpine vegetation or naked, with gigantic and fan- tastic cliffs, intersected by deep canons and lovely valleys of delicious climate and even temperature, where small towns have been built. The Pachuca range, whose beauty can be ad- mired from any of its peaks, is one of the most attractive parts of the Central Table-land.

From the abrupt peaks of the Organos de Actopam, w'hich are seen in the distance from the railroad, on the northwest, to the slopes and prolongations of the Havajas mountains on the southeast, the principal range is 40 kilometers long ; and at both extremes it joins with other important orographic ele- ments.

On the crest of the range rise peaks and plateaus to a con- siderable height above sea-level; for example, San Cristobal mountain 2880, Las Ventanas del Chico 3086, Cerro del Zu- mate 3057 and Las Navajas 3212 meters. For their remarka- ble beauty we may mention the magnificent forests which sur- round the Chico mining district (two hours and a half from Pachuca), from which rises a succession of steep rocks, called, with good reason, The ISTuns;’’ La Sabanilla, a small plateau surrounded by rocks and situated at the top of the range; the rocks near Real del Monjbe, and the splendid table-lands of Las Navaj as, commanding the beautiful panorama of the valley of Tiilancingo below and the grand canon of MetztitMn.

IV. Geology.

In Mexican territory there are numerous mineral regions which resemble those of Pachuca, not only in the age and character, but also in the condition and origin of the rocks which are cut by veins. With few exceptions, therefore, the

The Mining District Op Pachuca, Mexico. 231

descriptioH of one gives an idea of others. All of the Paehuca range is formed of volcanic Tertiary rocks which can be classified into three well-defined types as andesites, rhyolites and basalts. The andesites offer a great variety of colors and appearances due to small variations of structure and composi- tion and to different degrees of alteration. The normal type of this class is green and highly porphyritic, by reason of large crystals of feldspar and pyroxene contained in a microlitic magma with amorphous matter, which latter may diminish in amount so as to permit the rock to be considered as holocrys- talline. The phenocrysts are generally labradorite, often trans- formed into argillaceous or clayey products, or into sericite, with some calcite, chlorite and epidote, which is almost always observed in the interior of the crystals. The pyroxene is also changed with more frequency into chlorite, viridite and epidote, and sometimes into calcite. The magma contains microlites of oligoclase with grains of oxide of iron and sometimes augite microlites. The quartz appears in these rocks either from a primary element in the shape of corroded crystals, or as the result of a secondary impregnation of silica, taking place during the filling of the fissure, by mineral deposition or during the decomposition of the rocks. Other andesites of dark gray or green color, divided into thin slabs running paral- lel with the veins, contain large quantities of grains of iron in the magma, and more augite microlites and less silica than those mentioned above.

The green andesites present a uniform appearance at all depths with the same kind of alteration, showing that the causes which have produced modifications have produced every- where more or less, with the same intensity, truly metasomatic changes occasioned during the formation of the veins and cir- culation of hot waters, resulting in chemical reaction. The dynamic forces of certain tectonic movements do not fail to show their influence. The superficial alteration caused by at- mospheric agencies upon these rocks is also very important and is characterized by an advanced oxidation of the magma; the separation of lime of the feldspars, deposited later in the shape of small veins ; and, in a word, by the disintegration of the rocks, whose color changes from green to violet, gray and red.

The rhyolites cover the andesites in many parts of the dis- VOL. .— 14

The Mininh District Of Raghuca, Mexico.

trict and are spread out in large flows and in some places, in dikes. They are seen in Cerezo near Pachuca, in Actopan, and around Real del Monte and Las jLavajas mountains. Some of them are highly spherulitic; others are full of phenocrysts, with a tendency towards the felsonevadites ; and finally others are lithoidal. Obsidian, pitchstone and tufa are equally abun- dant, and are always associated with the rhyolites.

The basaltic rocks are the last volcanic eruptions of the Pa- chuca range. They are found on the slopes of the mountains, having run down a short distance, and have the appearance of very fluid lava. A cap of free olivine basalt (labradonte) serves as a crown to the top of the San Cristobal mountain in front of the city of Pachuca. It was in this rock that tridymite was first discovered by G. vom Rath.

The manner of eruption of the different kinds of rocks is worthy of special interest. It appears that the eruption of the andesites took place through large fissures, opened successively, which permitted not only the lava to flow out freely, but also spread out the cineritic products, such as tufa and breccia, which are principally found on the crest of the range, remain- ing there in spite of the active subsequent erosion.

The last eruptions of andesite brought out a large quantity of silica, sufficient to transform them into dacite, thus showing the proximity of the siliceous rocks or rhyolites. The latter must have broken the andesite crust, and formed during the eruption a wide streak of breccia, as they are seen at present on the crest of the range for a distance of about 12 kilometers. While these fissures were open to let the rhyolites pass out, some other openings parallel and adjacent to these were pro- duced ; and it is through them that the phenomena inseparable from these eruptions took place, such as fumaroles, and the circulation of streams of siliceous hot water, bringing from the depths the sulphides, chlorides and other metallic salts that were deposited as incrustations on the walls of the openings.

After a long period of rest that followed these phenomena, lines of less resistance permitted the passing out of the basic lavas, forming at the same time some openings and breaking or distorting the mineral deposits.

W e have assumed as a general fact that the andesites of the Pachiica range appeared in the Miocene age, and the eruptions

THE Mmma district of paghtjca, Mexico.

were the result of the forces that produced the folding of large Cretaceous deposits found in the immediate neighborhood of this range, like that of Zoquital range, the mountains near Actopan, in Ixmiquilpan, etc., where the contacts are seen. The foot- hills of the mountains in front of the Valley of Mexico are covered by a series of deposits belonging to the Pliocene and post-Pliocene lacustral formation which constitutes the bottom of this vast basin.

V. Vein-Phenomena.

One system only of fissures or openings running more or less east and west comprises the principal veins of the Pachuca district. Prom the main parallel veins branch out other sec- ondary and less important ones at angles of about 30. This region is not less uniform from a geological standpoint than with reference to the mineral deposits, which present the same character and structure in all parts. The argentiferous lodes of Hungary and some of the United States, with which those of Pachuca have been sometimes compared, are more complex in their nature and conditions.

In these veins or lodes the quartz forms the principal part of the mass. We can classify them as properly fissure-veins with quartz matrix.

This system of openings or fissures may easily be divided, according to their situation and importance, into four groups, closely joined; but each characterized by a main opening, to which some other smaller ones are attached with a little dif- ferent direction, as before stated. These groups we call la Vizcaina, el Cristo, San J uan Analco and Santa G-ertrudis.

A fifth group may be added, having as principal lode the Polo Uorte, situated at the extreme north of the district, near the top of the mountains.

The principal veins of Pachuca are more remarkable for their constancy and extension than for their thickness, which very seldom exceeds 7 meters. The Vizcaina has a length of 16 kilometers from the Barranca de los Leones on the east to the limit of the district of Real del Monte, traversing diago- nally the Pachuca range. The San Cristobal vein can be seen for a distance of 4 kilometers on the surface, and probably ex- tends out under the basaltic rocks of San Cristdbal mountain. It is supposed that the Analco lode follows a line 6 kilometers

The Mining District Oe Pachuca, Mexico.

loBgj and continues througli the valley of San Bartolo under the volcanic tufa which covers it.

Upon looking at the mining camp of Pachuca, the first thing which attracts one’s attention is the alteration of the rocks, generally more advanced near the croppings of the veins.

The fragmentary state of the rocks near the veins, caused by the forces developed during the opening of fissures, accelerates the atmospheric changes ; and these rocks have also been mod- ified by the filling-agencies, which impregnated them with an excess of silica. The aqueous and hydrosulphuric vapors pass- ing around through small openings have produced the kaolini- zation of the rocks ; and, finally, the easily oxidizable ores of the veins have also contributed to the alteration.

The croppings of the veins on the surface, generally called by the Mexican miners crestones exceed in height by several decimeters the general surface of the land, especially where the compact quartz prevails, whose white color contrasts with the yellowish gray tone of the land.

The Corteza vein furnishes us with a good example of such projecting outcrop, which, at a certain distance from the streets of Pachuca, may be seen running from the base to the top of Santa Apolonia mountain.

Some outcrops are composed of alternating streaks of pure quartz and highly silicified rock, of which it is diflS.cult for this reason to discern the primitive structure. Undoubtedly it is the same andesitic rock as that of the walls, and was re- tained in the interior of the veins during the deposition and surcharged with silica by the hydrothermal action which gives them the appearance of rhyolites, as in the veins of Schemnitz.

In the places where the surface is slightly inclined, as at the base of the mountains and on the small plateaus near the peaks, the croppings are covered by detritus or by vegetable earth, and there are no signs by which to trace the vein other than a yellowish stain of the earth, or quartz pebbles which have been the result of disintegration of the vein-material.

The Vizcaina lode, one of the most important, rarely has quartz in its surface-zone, and then only in the form of thin veins. Olay is the principal substance with a small amount of calcite. At times the structure is that of a breccia, indicating

The Mining District 01 Pachhca, Mexico.

a recent filling of tlie superficial fracture, formerly a cavity. The discovery of this great lode in Pachuca took place acci- dentally. No one would have thought of finding underneath this mass of detritus and clay the enormous treasure enclosed within its depths.

It is well known in Pachuca that the veins not well defined and not containing abundant quartz on the surface are rich only at depth. This is the case in the Vizcaina and Santa Ger- trudis veins, whose bonanzas have been found at 100 or 150 meters below the surface.

The quartz croppings almost always carry pyrites, alternat- ing with oxides of manganese and other minerals, always argentiferous, with a very appreciable amount of gold. These veins, thus mineralized at the top, have shown great bonanzas from the surface down, and were those which naturally at- tracted the attention of the prospector from the first days of the Conquest of Mexico, as is shown by the large open work- ings in the veins of the Cristo, Rejona, Analco, etc., from which the first bonanzas of Pachuca were extracted.

Among the accidents of the veins near the surface the branching-ofl‘ may be observed at once. One vein is divided into three or more diverging branches, which reunite again far- ther on, being divided by siliceous rocks which the miners call eaballos (horses). Amongst the cases which have been de- scribed, we may cite here the Rosario Yiejo; the Maravillas and Yalenciana, which branch off in the shape of an arch; but principally the Analco vein near the Rosario tunnel. In these ramifications one of the branches preserves the general direc- tion of the vein, while the other curves out, forming a circular arch of great radius.

In the Pachuca veins it is to be noted at once that the nature of the ores presents in the vertical sense two zones : the upper composed of oxides (red ores), and the lower of sulphides (black ores). The first zone contains, as principal minerals, outside of iron always abundantly auriferous, oxides of man- ganese {quemazones) chlorides and bromides of silver. The lower zone contains the sulphides of different metals, lead, silver, etc. As will be understood, it generally occurs that at different points in this region the lower limit of the upper zone corresponds to the hydrostatic drainage-level of the country.

236 The Mining District Of Pachuca, Mexico.

The valimhle minerals in the upper zone have been princi- pally chlorides and bromides of silver. It is therefore easy to understand the secret of the facility with which the ores are treated by the amalgamation or “patio ” process and the con- sequent active exploitation of the superficial bonanzas. In our day, exploitation is confined exclusively to the lower depths of the veins, in the negros zone, the only one with regard to the composition and nature of which we now have reliable and complete data, and hence the one to be here described.

We have already said that the veins are in part composed of a compact breccia in the upper and even in the deep regions, on account of actions subsequent to the filling of the fissures — a fact of great influence upon the distribution of the richness and the relative hardness of difterent parts, which has not escaped the skillful eye of our miners.

The quartz in the veins has a greasy luster and milky color. In the streaks of the side-walls it is sometimes bluish, like chalcedony, or greenish. Many veins carry amethystine quartz either covering geodes or in streaks of crystals radially grouped,, which alternate with streaks of white quartz.

Calcite is only found in small quantities as matrix in the Pa- chuca veins, and is not a constant mineral. It appears in crys- tals upon the quartz geodes or in small veins filling narrow” openings, and, finally, in the last layers of concretions.

Of the sulphides it appears that minerals such as pyrite galena and argentite, were in the majority of cases deposited at the same time as the quartz, with which they are so perfectly blended that separation is impracticable. It also occurs that the quartz has been deposited alone, the barren quartz alternat- ing with streaks of rich quartz. When closely mixed with sulphide it gives a gray tone or is distinctly white, with fine black spots ; and when in payable amounts is called by the miners azogms.

Concretionary streaks alternating with barren quartz and azogues and parallel and symmetrical to the side-walls may be seen very readily in the old workings in the San Pedro, Oriste and other mines. On the Vizcaina vein, in the Santa Ana mine, the black sulphides fill irregular cracks, which cross the quartz, indicating that the sulphides were the last to be depos- ited. Fragments of rock displaced from the walls and floating

The Mining District Of Pachuoa, Mexico.

23r

in the vein are found at all known depths, without any regu- larity whatever in their distribution, and of all dimensions. The more or less angular character of these fragments demon- strates that they have not traveled any great distance. The concretion of the quartz and of the sulphides, immediately sur- rounding each fragment, shows the same regularity through the entire thickness of the vein.

Manganese is so abundant in the veins that at times it con- stitutes the greater part of the matrix. As already observed, it is found at the surface as earthy or compact oxides mixed with the quartz, or isolated in streaks. Towards the bottom, the oxide decreases little by little, being replaced by rhodonite, a silicate of varied structure from compact to fibrous, and shaded red, rose or white.

The ore extracted from the famous Eosario bonanza was characterized by the abundance of silicate and oxides of man- ganese, associated with argentiferous sulphides. Other com- pounds of manganese are found at times in small quantities, among which are xonaltite, bustamite and rhodochrosite.

From the manner in which the manganese presents itself in the veins it is supposed that it must have appeared after the first deposition of quartz, as it is seldom found near the walls, while in the middle of the veins it is very much mixed with the argentiferous ores which it has served as a vehicle.

When manganese does not otherwise exist in the veins, the lower parts contain it in small quantities between the latest layers of the concretions lining the cavities in the quartz.

In the Santa Gertrudis vein of the Barron mine, barytite has occasionally been found in beautiful crystals at 150 meters depth.

Gradually, as one descends in the veins, the oxide of iron di- minishes little by little, and finally consists of simply two narrow streaks adhering to the walls. At the same time the oxides of manganese give place to the silicates from which the oxides of the surface were formed by the dissolving action of the carbon- ated surface-waters. The oxides of iron and of manganese are always in similar proportions.

Pyrite is very frequent in the mineralized parts of the veins, and also abundant in the rocks in the immediate vicinity of the veins, where it sometimes occurs in granular mass and

The Mining Distbict Of Paghuca, Mexico.

sometimes in fine crystals and isolated grains. The existence nf pyrite in the rocks near the veins has more than once served as a guide to indicate the proximity of the deposits sought for by extensive explorations.

But pyrite occurring in grains and complete crystals in the country-rock of the walls does not contain even traces of precious metals; while, on the contrary, the solid granular pyrite of the veins always contains them mechanically inter- spersed. In the barren parts of the veins, an increase in the amount of the pyrite demonstrates the proximity of richer ore. The rich pyrite and the sterile pyrite must have differ- ent origins.

The pyrite of the altered rocks in fine crystals is the prod- uct of a regeneration. The sulphate of iron which results from the decomposition of the pyrite in the interior may be, under special conditions, in the presence of the organic matter near the surface, again reduced to pyrite.

The granular pyrite of the veins, on the other hand, is always accompanied by other sulphide ores as fine-grained. Q-alena, argentite and chalcopyrite form the principal ores of these veins; stephanite and polybasite are sometimes found; zinc- blende seldom exists in the regions so far exploited, and it would appear that its presence indicates impoverishment.

At a depth of 350 meters in the San Rafael and Zotol mines there have been found ores with a little blende and threads of native copper, accompanied by argentiferous base minerals ; on the contrary, in the old workings of the San Pedro mine, the blende found was almost entirely free from precious metals.

native silver is found at all depths ; ruby-silver has never been found in the Pachuca veins. This distinguishes the dis- trict from other mining regions of the central plateau with which it has been compared, and which are similar even from a geological point of view.

The principal problem of a group of important veins is the distribution of values horizontally, as well as on the dip.

Unfortunately, the data on this point which we have suc- ceeded in obtaining relative to Pachuca are incomplete, because information is lacking concerning the very extensive plans of the old workings, and also on account of the relative neglect

The Minihh District Of Paohuca, Mexico. 239

of this subject on the part of the engineers in charge of more recent maps of the mines. Observation and study of the cavi- ties from which there have been extracted great bonanzas cannot now be easily made, because they are destroyed or abandoned ; neither can it be done in newer workings, which have been filled and fortified to serve as passage-ways to new exploitations. However, a superficial inspection of the hori- zontal projection of the map of the subterranean works at Pachuca immediately shows that the bonanza parts of the veins group themselves in a zone oriented from northeast to south- west, nearly normal to the parallel system of veins, and that these bonanzas are distributed in an alternate manner ; that is, that the bonanza of one vein places itself in front of the sterile portion of the neighboring vein, and so on. By study of the vertical projection, it will be seen that the bonanzas group them- selves into two distinct zones, namely, the upper zone above the mouth of the shaft of San Juan, and the lower zone, ex- tending to the present works. Some veins (Oristo) have had bonanzas in the upper parts only, others (Vizcaina, Santa Grer- trudis) in the lower zone only, while the Analco and Corteza veins have had bonanzas in both zones.

The contour of a bonanza is generally irregular, although it may have a frequent tendency to an elliptic form. Yery seldom have they circular or elliptic outlines, and it would never be advisable to designate them as columns or chimneys, as they have at times been called. If we compare the number of bonanzas of the upper zone with those of the lower, we find that the former are more numerous. This is contrary to what has been supposed hitherto to be the case in Pachuca, where everyone has believed that in reality the bonanza region of Pa- chuca was to be found at a depth of 100 to 150 meters.

In dimensions, the bonanzas vary considerably, Some are of colossal proportions; one of the largest being the San Eafael, which was found at more than 100 meters depth and is elliptic in form, the greatest axis being more than 1000 meters and the smaller 400 meters, with an average thickness of 2|- meters. This bonanza has produced nearly $14,000,000 during a period of ten years.

The great bonanza of Rosario produced, from 1853 to 1883 (30 years), $28,000,000. From the Encino mine $6,000,000

The Mining Disteict Op Pachuca, Mexico.

was produced during the eighteenth century, and above the depth of 200 meters. Unfortunately we cannot furnish any data as to the enormous product of the Santa Gertrudis bonanza which has been, perhaps, greater than that of San Eafael.

The miners employ, to designate the rich parts of the lodes terms which in themselves give an idea of relative magnitude. The small bonanzas of more or less regular form are called dams nails.'’ When several are found close to each other they are called bolsas “pockets.” The small, rich, isolated parts distributed at hazard in the veins are called ojos, “ eyes,” and the mineralized points moscas “ flies.” It will be under- stood that these terms do not have an absolutely precise meaning.

In Pachuca, the impoverishment of the veins at great depth is admitted to be a fact. At the bottom of some of them it has been seen that those composed of sterile galena and blende, although of good appearance, are too poor to pay working-expenses. We believe that by carrying these investi- gations to a greater depth, there might be found, and uncov- ered, new bonanzas after removing an intervening portion more or less impoverished. This belief is based upon certain actual developments. For example, in the San Eafael and Maravillas mines, beyond an impoverished portion, there has immediately appeared native copper with polybasic mineral, blende, and notably rich ores (naturally rebellious), showing what would be the mineral composition of the ores of the third zone. This, at no distant date, must be uncovered, thus giving life again to the mineral production of the district, which at the present time sufiers in consequence of the crisis caused by an inunda- tion which it has not yet been able to overcome.

Before concluding, let us state that mechanical actions and movements in the veins have produced changes in the nature of the minerals of which they are composed, and phenomena of mechanical transportation have caused accidental richness in the veins, frequently accompanied by products of tritura- tion, called in the district lamas which are at times extraor- dinarily rich ; and, finally, that the parts of the veins originally rich correspond to the more cracked and distorted places, where the fissures were larger, where the veins are less in-

Mining And Metallukgical Industry Of Nuevo Leon, Mex. 241

dined, and where they change direction, or where the branches separate. All these elements seem to have shared in deter- mining the location or accentuating the importance of bonanzas.

Statistics of the Mining and Metallurgical Industry of the State of Nuevo Leon, Mexico.

(Mexican Meeting, November, 1901.)

[Secretary's Note. — The following oificial tables, prepared by the government of the State of Nuevo Leon, and presented to the Institute at the fifth session of its Mexican meeting, held at Monterrey, November 26, 1901, present in compact form a general summary of the mineral and metallurgical industry of the State for the preceding calendar year, together with a state- ment of the railway-shipments of ores from January 1 to Oc- tober 31, 1901, which, in the absence of direct official mining and metallurgical statistics (not yet available for that year), clearly indicates an increased activity and productiveness of these industries. In other words, the mines are reported to have yielded in 1900 a total product of 83,960,169 kilos of ore; whereas, the railway is reported to have carried, in 10 months of 1901, a total of 108,318,647 kilos of ore. At this rate, the railway-shipments for 1901 would amount to nearly 130,000,000 kilos. It is, of course, possible that the railway- statistics include other freight than ores, or that they include duplications, such as would be involved in the record, first of certain ores transported, and afterwards of the base bullion ’’ produced therefrom. An accurate comparison is therefore im- possible; yet, after making all reasonable allowances for such items as have been named, it seems safe to infer that the mining and metallurgical industry of this State accomplished in 1901 a substantial progress.]

242 MINIM AND MBTALLURaiCAL INDUSTRY OF NUEVO LEON, MEN,

Table I. — List and Output of the Mines Operated Luring 1900 in

Nmo Leon.

Name.

Locality.

1 Metals.

Ore Mined. Kilogrammes

Value.

Pesos.

La Blanca y Anexas

Agualeguas.

Silver & lead.

194,820

; 13,662.14

Hidalgo

Aramberri.

CoDDer.

5,000

El Eosario

Carmen.

Silver & lead.

400,000

! 4,000.00

Los San Pedros

Cerralvo.

a

ti

500,000

5 , 000.00

Buenos Amigos

a

it

ti

100,000

! 10,000.00

El Oso

(C

it

it

25,000

2,500.00

La Libertad

ti

it

tt

3i;092

San Tsidro

it

It

ti

30;380

; 2,734.20

Santa Isabel

u

it

it

16; 600

1,006.67

San Juan y Anexas

Doctor Arroyo.

ti

a

1 , 455 ; 104

29 ; 102. 08

La Esperanza

Lampazos.

it

ti

150,000

11,000.00

Sacramento

a

ti

ti

36,000

1,000.00

La Voladora

it

ti

20,000

La Eealidad

i(

it

it

60;000

1,800.00

Flor de Pena

it

a

200,000

6 , 000.00

La Plomosa

(C

it

tt

51,000

1,552.00

El Eefugio

it

it

5,874,692

219,869.59

Zaragoza

Monterrey.

it

a

2,144,000

64,300.04

San Slartm

(C

it

it

35,940

1,249.23

San Marcos

a

it

966,600

8,935.08

San Felipe

(C

it

ti

1,143,270

24,301.85

Ampliacibn de San Pedro.

u

it

ti

31,938,337

416,915.33

San Pablo

a

ti

3,576,025

58,688.84

Denver

a

it

a

449,728

2,921.03

Miguel Escobedo

i(

it

tt

333,355

8,572.45

Carmen

C(

it

ti

216,650

5,093.06

La Voladora

tc

it

tc

1,840,000

59,000.00

La Unibn

Mina.

tt

a

60,000

1,200.00

Soledad y Anexas

Sabinas Hidalgo.

tt

it

5,416,539

140,690.00

Santo Domingo

Santa Catarina.

tt

it

600,000

9,500.00

Buena Vista

C( u

it

ti

2,612,000

20,000.00

Santa Gertrudis

cc i(

Zinc.

1,403,300

9,000.00

San Marcos

Villaldama.

Lead.

10,000

Montanas

ct

ti

1,278,377

25,042.62

Don Caspar

a

ti

5,196,600

67,548.33

Buena Vista

tt

7,581,290

49,623.47

Morenos

it

2,078,640

22,865.04

San Juan

tt

306,200

4,593.60

Guadalupe

ti

it

3,118,407

86,030,60

Bocanegra.,..;

ti

Iron.

2,001,503

9,039.55

San Francisco

it

Lead.

503,720

5,039.83

Total

83,960,169

1,400,746.63

Minins And Metalluegical Inddstet Of Nuevo Leon, Mex. 243

Table II .— and Product of the Metallurgical Works Operated Paring 1900 in Nuevo Leon.

Class, Weight and Value of Product.

Name and Locality.

Gold.

Silver.

Lead.

TotalValue,

Pesos.

Kilos.

Pesos.

Kilos.

Pesos.

Kilos.

Pesos.

Gran Fundicin Nacional Mex- icana, Monter- rey

444,865.16

238,157.723

9,727,864.24

23,021.154

1,012,930.00

11,185,659.40

CompanlaMine- ra Fundidora y Afinadora “Monterrey,” S. A., Monter- rey

319,666.96

140,870.897

5,763,732.75

12,510.054

688,052.48

6,771,452.19

Benavides, Cer- ralvo

18,953.69

81,230 10

100,183.79

Total

1,131.942

764,532.12

379,570.154

15,510,550.68

36,072.733

1,782,212.58

18,057,296.88

Table III. — Monthly Mineral Shipments over the' Mineral Bailway from Jan, 1 to October 31, 1901, Inclusive.

Months.

Kilogrammes.

.Tfl.miflTV.*.

9,698,756

8,996,460

12,050,451

10,976,740

9,960,350

10,879,920

11,780,520

12,484,160

10,347,310

11,143,980

Ifehmary

Mareh

April

IVIfl.v

Jnly

Ancrnsit.

September

October.

Xotsil.

108,318,647

244 The Pachuca Stamp-Battery And Its Predecessors.

The Pachuca Stamp-Battery and Its Predecessors.

By M. P. Boss, Pachtjca, Mexico,

(Mexican Meeting, November, 1901.)

Oe the two methods of mechanical reduction — that of per- cussion and that of abrasion — it is not easy to say which was first employed by primeval man. The stone hammer and the flat or hollowed stone used for grinding are found together in the remains of prehistoric periods. But the use of the maray or bucking-stone, developed from the hammer, was probably introduced later than that of crude millstones, Diodorus Siculus, the Eoman historian of the first century b. c., mentions such millstones as used in the mines of Egypt to pulverize ma- terial which had been previously broken in a mortar.

The invention of the arrastra for fine grinding is declared by some authorities to have been made by Bartolomeo de Me- dina, at Pachuca, Mexico, about a. d. 1557 — which is quite probable. Being the first to amalgamate silver on anything like a business scale, he must have felt the necessity for ore- grinding apparatus of greater capacity than the old primitive millstones; and the arrastra was thus the natural successor of the millstone.

It is very unfortunate that the archives of Pachuca, which has made so much history in ore-treatment, were destroyed in some one of the many insurrections for which, also, the place is renowned.

The first application of the stamp to the crushing of rock is asserted by some writers to have been the invention of a Saxon nobleman named Von Maltitz, about the year 1505. Better authenticated reference, however, is made to one Paul Gronstetter, a native of Schwarz, and called an ingenious worker, who, in the year 1519, established at Joachim sthal a process of wet stamping and sifting. Two years later, a larger plant was established at the same place. It is said that he had previously introduced the same device at Schneeberg. How much of the invention was due to Gronstetter is not certain ;

The Pachuca Stamp-Battery And Its Predecessors. 245

but it certainly seems that he was the first successful operator, and that it rapidly came into extensive use, as a direct result of his operations.

Whether the stamp-mill was then practically as we find it pro- fusely illustrated in the work of George Agricola, some years later, or whether it had been farther developed by other hands in the interim, we are not informed. But for more than 300 years the stamp continued to be a square timber (except in a few instances, where square iron was used) with an iron shoe at the lower end. In this form it came to crush the first gold- ore of California.

As soon as stamps began to fall on California gold quartz, brains began to work for their improvement. There was in those days so little system and so much crudeness of construc- tion, as well as secrecy of methods, that the early improve- ments can be traced with difficulty. Previous to the general adoption of the round revolving stamp, numerous departures had been made from the original imported type. One style came into vogue in the territory around Marysville, Cal. It was square, and had two stems, driven with a taper into the head ; and the rectangular tappet was held by cross-keys, one for each stem. The stems were cross-slotted to engage the keys. Some of these stamps weighed as much as 1000 lbs. each. The shoes were held by a square taper shank.

An article of considerable fullness, by C. P. Stanford, in the San Francisco Mining and Sdentijic Press of October 21, 1893, shows conclusively that that gentleman was the inventor of the round stamp ; but it was not made to revolve until this feature was suggested by Isaac Fisk, an engineer in his employ.

The U. S. patent granted July 4, 1854, to Joseph L. Laird, for an improvement in ore-stamps, claimed the arrangement of the lifters by being so placed as to operate on the periphery of the tappet-head for the purpose of giving the stamps a par- tial rotation without requiring other mechanism in the manner set forth,' This inventor very likely found his patent invalid for lack of novelty. At all events, no instance can be found of his claiming royalty for the thousands of stamps which were in use, with this improvement, during the life of the patent.

After the introduction of the round stamp, Mr. Zenos

246 The Pachxjca Stamp-Battery And Its Predecessors.

Wheeler devised a means of holding the tappet by screwing it upon the stem. Later, when having a large stamp-mill built at the Miners foundry, in San Francisco, he accepted the advice of Mr. H. B. Angel and had it made with a gib and two cross-keys in the tappet. Years later, Mr. Irving M. Scott cast the gib into the tappet, making it shorter and entirely enclos- ing it at the ends, thereby securing it against maladjustment, as well as simplifying its construction.

In 1857 Mr. Samuel J. Black, complaining of the faultiness of all cams hitherto made, requested Mr. H. J. Booth, of the Marysville foundry, to make a cam that would at all times bear only on a diameter-line of the tappet parallel with the cam- shaft. Mr. Booth got the lines for such a cam by means of a board revolved upon a center corresponding with the cam-shaft center, locating his points with a dummy tappet, working upon a slide. Of course, this gave practically an involute curve. The first double-arm cam, made as they are made to-day, with the hub on one side, to bring the stamp nearer to the shaft, and laid out as an involute, was designed by Mr. Irving M. Scott.

The high-box mortar is thought by some to be due to Mr. Zenos Wheeler ; but positive information on this point is un- attainable. Yor is it to be ascertained to whom is due the introduction of the long battery-foundation blocks, set on end.

This outlines the evolution of the world-famous California stamp-battery. It has continued, and still continues, to un- dergo a gradual refinement of detail, and it has become cos- mopolitan.

Judged from the standards of the present day of technical schools and highly-developed mechanics, the evolution of the California stamp seems but a trivial and simple matter ; but at that time it was an important step up the ladder of progress.

Sixteen years ago the writer became an advocate of concrete foundations and low-set guides for stamps, and, three years later, took the opportunity to apply these principles to the original Hacienda de San Francisco of Pachuca.

This first foundation, however, was not an unqualified suc- cess, the concrete havxag been insufficiently rammed; but it was a guiding star for the erection of the new Hacienda de San Francisco built at Zotol. This mill began crushing ore the let

The Pachuca Stamp-Battery And Its Predecessors. 247

of May, 1894, has been in practically constant operation ever since, and. has made a record, in some respects very remarka- ble. It was built with 20, and in the following year increased to 30 stamps. During these severr years, only four stems, all told, have been broken, and one renewed; and the stems are not seriously worn in the guides. The stamps, when new, weigh 1040 lbs. each, and make 102 drops per minute. Each stamp has therefore dropped about 450,000,000 times, without renewal of stem or guide.

For this result I assign three causes :

1. The long stamp-head and low guide prevent severe wrench to the stem when the stamp strikes hard at one edge of the shoe.

2. The solidity of the concrete foundations keeps the jar and vibration of the iron-work at a minimum.

3. The iron guides give the stem but little play.

At the Hacienda de San FrandseOj now running, the concrete was laid upon solid bed-rock, and was 9 ft. in depth and 9 ft. in width. It was very thoroughly rammed as laid. On a hard bed-rock there is no necessity for deep concrete, except to secure the required height: in fact, no foundation could be better than a solid, unfailing granite bed-rock, with only a thin sheet of rubber or canvas between it and the mortar. With a mortar having a fairly thick bottom, this would make a perfect anvil for the blows of the stamps.

The top of the stamp-head in the San Francisco is only 2 in. below the lower guide when the stamp has new shoe and die, and is raised 6 in. for drop. This, of course, requires that the housing shall be around the stamp-head instead of around the stem — which is easily effected with a long stamp-head.

Guides of iron themselves wear so little, and also wear the stem so much less than wooden guides, that they are beyond comparison better. For example, how thick would a stem be, after running seven years in wooden guides, without repairs or alteration in length ? The reason that wooden guides wear the stem so much faster than iron ones is that they accumulate grit, whereas an iron guide becomes smooth and polished.

VOIi. XXXII. — 15

An Adobe Reverberatory Furnace.

An Adobe Reverberatory Furnace.

By John Gross, Sombrerete, Zacatecas, Mex.

(Mexican Meeting, November, 1901.)

The building of reverberatory furnaces (Fortschaufelungsofen) where ordinary brick, fire-brick and iron are comparatively cheap, is quite a difterent matter from the building of such furnaces in isolated camps, where proper material is only to be obtained at high cost and with long delays. Time is always a large factor in metallurgical operations, and the metallurgist may find himself in a position where it becomes necessary to erect apparatus and have it running in less time than it 'would take to obtain material from outside. It is here that he must make use of makeshifts.

In Mexico, one of the most important of these is the all- useful adobe. Employed from prehistoric times, it still has its sphere of application in a surprisingly large number of in- stances requiring an article that can be quickly and cheaply produced.

It is quite possible to erect serviceable reverberatory furnaces with no other materials than adobes, stone and wood.

The old Mexican smelting shaft-furnace was an example of what can be done with adobes, and the large number of ruins of this class of furnace scattered through the mining districts of Mexico are silent testimony to the genius of a people who demonstrated their capability of adapting material at hand to their needs.

The present paper will describe briefly the construction of an adobe reverberatory furnace which is giving good results, can be quickly erected at a low cost, and, if properly built and handled, will last a long time.

The material being simply sun-dried, it naturally follows that the construction must be quite heavy. The adobes should be evenly made, with just sufficient straw to hold them together, and not too large in size (9 in. wide, 18 in. long and 4 in. thick

An Adobe Reverbeeatory Furnace.

is very convenient). The binding-material should be of the same clay as the adobes.

The drawings explain themselves. Fig. 1 is a ground-plan

through the lower hearths; Fig. 2 a longitudinal section ; and Fig. 3 a cross-section.

The furnace is double-decked, with three hearths on each deck and an auxiliary fire-place for the upper deck. It is

Longitudinal Section.

An Adobe Kevebberatoey Furnace.

designed for wood firing and chloridizing roasting, and is operated entirely by manna] labor.

The ore is charged through a hole in the roof, worked in charges of 1200 kilos, and finally drawn through the last rab- bling door into wheelbarrows, to go to the cooling-floor.

ISTaturally, different ores and conditions would suggest other modes of building and manipulation ; but the object of this paper is simply to show this particular furnace as it is.

The hearths are 10 by 10 ft. in size, with 3-ft. walls, making the furnace 16 ft. wide and about 41 ft. long. The arch springs 9 in. above the hearth floor, and has a 12 in. rise.

The foundation is of stone, well-built on a solid footing, and carried up to the first set of buck-stay rods. These 1-in. iron

Adobe Beverberatory Furnace, Cross-Section. Scale, in. 1 ft.

rods are placed in pipes or channels, to prevent their burning out, and to permit them to be easily changed if necessary.

The outside walls of adobe are now built up to the top of the lower skew-back, when the floor of the hearth, which consists of a “ fire-stone ” set in clay, is put in. Each hearth is stepped a few inches lower than the preceding one.

The center (of dirt) for the arch is now put in, and curved to templates. A 10-ft. span of ‘arch should not have less than 12 in. rise. When the center has been satisfactorily placed the skew-back is cut, and the arch is built of “ arch ’’-adobes, placed upright, and making an 18-in. arch. This arch should be carefully built, using as little mud (made from screened clay) for joints as possible, and hammering adobes in place with a block of wood.

Views Of An Old Smelter In State Of Morelos, Mex. 251

After the arch has been well keyed, the middle buck-stay rods of 1-iii. iron are placed in pipes just over it, and the walls are carried up to the top of the skew-back of the upper arch ; the upper hearth-floor is put in; the center is placed as before; and the upper arch is built of the same size as the lower one. The upper rods of 1-in. iron, just over the upper arch, need not be put in pipes ; however, it is convenient to do so. The top of the furnace is paved with flagstones.

The buck-stays of 10 by 10 in. timbers are now put on ; the rods are tightened thoroughly ; and the centers are removed by boys, getting into the furnace through the fire-box, after this has been cleaned out.

A light fire is started and kept going one day in the lower fire-box, and then in the auxiliary one ; the lower fire being in- creased. After three days of gradually increased firing, during which time steam and water are likely to appear in a few cracks, and the rods are occasionally tightened, a charge of ore is put on each hearth. The sulphur, soon igniting, will in a day or two, with proper firing, bring the furnace up to a tem- perature sufficient to begin operations. Some 4 or 5 days more are required, however, before the furnace is properly heated, owing to the enormous body of adobe-work that must be brought up to proper temperature.

The rods must be looked after to see that they are kept tight, or, if they burn out, that they be replaced. The enor- mous weight of the arches will cause their gradual sinking, if not properly held, but they sink very slowly and give abundant notice.

Views of an Old Smelter in the State of Morelos, Mexico.

By 0. W. Pritchett, Steamboat Springs, Colo.

(Mexican Meeting, November, 1901.)

Several years ago, during a trip from Jojutla to Huauatla, in the state of Morelos, Mexico, I was told by my guide of the ruins of an old smelter near by, and my curiosity was excited to such an extent that I went out of my way several miles to see them. I found them very interesting ; and, as I fortunately

252 Views Of An Ole Smelter In State Of Morelos, Mex.

had a few plates and a camera with me, I was able to obtain a few views which may be interesting to others, as showing what was being done in the sixteenth century in the way of smelting in Old Mexico. The date on the old church near by is 1540,. and it is believed that the smelters were erected about the same time by the Jesuit fathers. The church is still in use,, but I was unable to get a view of it, as I had used up all my plates on the -smelter.

The smelter is about 10 miles east of the town of Jojutla, on the Ixtoluca river. Fig. 1 shows an old stone bridge over this river, on the road leading to the smelter. The bridge is- just wide enough for one animal, and has, at the first pier on the west side of the river, a short turn, which can be discerned in the picture. The plant was an extensive one, even accord- ing to the notions of to-day.

In what seems to have been the smelting-department are still standing the stone and mortar housings of three large over- shot water-wheels about 15 feet in diameter. Water was brought from the river by a splendidly constructed ditch about 3 miles in length. At the river, portions of an excellent dam are still standing. Arrangements were made for the water to flow in small canals along the tops of the division-walls of the building ; and, in many places in the building, a connection was made through the legs of the arches with the upper canals so that, apparently, by pulling out a wooden stopper, water could be had in various parts of the hacienda.

Pig. 2 is a view taken from a stone staircase in the smelting- department which communicated with the upper floor. The view looks toward the entrance, and shows an old sundial on the leg of the third arch in the perspective.

Fig. 3 shows the hood of the smelting-furnace. I was un- able to get any views of the furnace under the hood. The notable absence of slag, and the arrangement of water-canals at the base of the furnace, suggest that slag-granulation may have been practiced here.

Fig. 4 shows three reverberatory roasting-furnaces, with sep- arate chimneys, arched backs and sloping hearths. For grate- bars, slabs of igneous rock were used, slanting toward the door. Fig. 5 is a nearer view of one of these furnaces.

Fig. 6 is a view of what was to me the most interesting

Fig.

Views Oe An Old Smelter In State Of Morelos, Mex. 253 -

Auciept Stone Bridge over tlie Ixtoluca Biver,

254 Views Of An Old Smelter In State Of Morelos, Men.

Interior View in Smelting* Department.

Hood of Ancient Smelting Furnace.

256 Views Oe An Old Smelter In State Oe Morelos, Mex.

Fig. 4.

Three Reverberatory Roasting-Furnaces.

Eeverberatory Koasting-Furnace. (One of those shown in Fig. 4. )

Old Stone Stamp-Mill.

The Mexican Railkoad-System.

fea,ture of this hacienda a stone stamp-mill, probably the oldest in existence on the continent. It seems that this battery may have consisted originally of four stamps, but that part of it was walled up and only two stamps were used. The mortars were of stone and could be removed when worn out. The stems were evidently of wood, and 4 to 5 in. square, as indicated by the square holes in the arch above each mortar. The stamps were evidently raised by hand and allowed to drop. Back of the mortars is a small room, evidently for ore and the feeder. The roof above is reached by stone steps, and, judging by the worn places around the guide-holes, the men who raised the stamps probably stood up there. In front of the mortars, for a distance of about 30 ft, are still portions of an inclined plane of stone, with riffles cut in it, which was probably used for concentration.

It seems probable that this plant was built to treat the ores from the mining camp of Huauatla, about 20 miles distant.

The Mexican Railroad-System.

BY VICTOR M. BRASCHI AND EZEQUIEL ORDONEZ, MEXICO CITY.* (Mexican Meeting, Novera'ber, 1901.)

L Historical Summary.

The railroad history of Mexico began with the first presi- dential term of General Diaz. Concessions for the building of railroads had been granted in former years; indeed, an ex- clusive privilege was granted, August 22, 1837, to Brancisco de Arrillaga for the construction of a railroad from Mexico to Yera Cruz, with a branch to Puebla, and other concessions were granted from then on at various periods; but the year 1877 was the real beginning of the regular and constant develop- ment of the railways of Mexico.

The programme laid out at that time by the new government, and responded to by the nation, was to develop its natural ele-

SECBETABYts NoTE.— Sections I. and 11. of this paper were written by Mr. Braschi ; Section III. by Sr. Ordonez. — R. W. R.

The Mexican Railroad-System.

ments of wealth ; to repeople the national territory which for- eign wars and internal strife had almost depopulated ; to cross the land with ample and rapid ways of communication; to open new markets to Mexican products ; to increase internal trade; to end at once and forever fiscal penury and its fatal, and until then inevitable, consequences ; to re-establish the lost national credit ; to difiuse popular instruction ; and, finally, to promote in every way public and private prosperity, thus re- deeming the nation from the double slavery of ignorance and poverty, and elevating it, through its wealth and power, to the high level that it ought to occupy among civilized nations.

To establish and insure peace, it was necessary to join the integral parts of the country by means of rapid ways of tran- sit, a military strategical necessity, because, in the words of General Diaz, unstable and changeable governments, incapa- ble of protecting life and property, either end in absorption by a stronger people or use themselves up and disappear, without leaving in history other traces than sometimes those of their heroism, but more often the remembrance of their misery and sufferings.’’

Moreover, beyond their military significance, such means of rapid and easy internal transportation, permitting freedom of travel, trade and correspondence, would stimulate enterprise, increase production, and promote the growth of both general intelligence and national wealth.

The technical problem of Mexico’s rapid and economical means of communication was not difficult. On the map, Mexico has the shape of a leg of mutton, wide at the north ; its coast-lines joining in curves to form to the south the isthmus of Tehuantepec ; without navigable rivers, except in the narrow and uncultivated mountainous and tropical regions of the south ; and with two formidable systems of mountains parallel to the coasts, forming in the center of the country the great table-land of Mexico, inhabited by about half the total popula- tion. This table-land has the same general shape as the coun- try, namely, an oblique triangle, with its base upon the northern frontier of the Rio Grande and its apex about in the valley of the City of Mexico. South of this valley the two coast-systems of mountains mix and join, so that the rest of the country down to the isthmus of Tehuantepec is mountainous, with the ex-

The Mexican Baileoab-System.

ception, of course, of the flat coast-fringes. The central table- land is not absolutely level, but slopes northward to the Rio Grande, and is crossed by numerous separate systems of moun- tains and hills, independent of the two coast-ranges.

The population of Mexico is distributed roughly as follows :

Per cent.

Central States, 47

Pacific Coast States, 33

G-alf of Mexico States, 12

Northern Frontier, . . 8

Total, 100

In 1877 the central table-land, containing about half the popu- lation, and which is the true and typical Mexico, was thus sep- arated from the coast by two systems of mountain-ranges, and its own principal subdivisions were separated by long distances, occupied by large, uncultivated, and almost desert territo- ries. The north, with its long, thinly-settled frontier, and only 8 per cent, of the total population, was indeed a free and wide field for insurrection and smuggling. The Pacific Coast States, with one-third of the population, were entirely separated from the rest of the country by the Sierra Madre mountains. These physical barriers, of course, still remain; but statesmanship and enterprise have so far overcome them that they are no longer absolute barriers. It is as if they had been half-oblit- erated.

Mexico, therefore, was then a nation composed of almost in- dependent provinces or petty States, united only by a common language, origin and history, and by memories of a common resistance to two foreign aggressions, notwithstanding which, they tore each other up in internal fratricidal wars. These States, separated by difl3.eult mountains and extensive deserts, had accentuated their natural isolation by raising against each other artificial walls in the shape of interior custom-houses; and their highways were infested by bandits, encouraged by the long intervals between cities, and by repeated revolutionary disorders. When the modern history of Mexico began in 1877, the country was anxious and ready for a change.

The topographical and geographical distribution of the pop- ulation being such as we have seen, and no navigable rivers ex-

The Mexican Kailkoad-Systbm.

isting in the populated portion of the country, the engineer- ing scheme for rapid ways of transit proposed, of course, a net of railroads. This was composed, broadly speaking, of the fol- lowing systems :

1. Lines which, starting from various points on the northern frontier upon the Rio Grande, should cross the great central table-land, converging to the capital, the apex of the triangle of the table-land. These lines would join the capital to the central and northern States, and, crossing vast uncultivated territories, would connect with the railroad-systems of the TJnited States.

2. Lines which, starting from the Gulf of Mexico, should climb the east or Gulf range of mountains, to join the central table-land with the Gulf.

3. Lines which, starting from the City of Mexico and its neighborhood, should invade the mountainous regions of the South and South Pacific.

4. Lines which, crossing the Sierra Madre from any pos- sible point on the West, should join the Pacific Coast with the center and the Gulf

5. Subsidiary lines and branches.

In general, these theoretical railway-schemes had, of course, been understood in early days; and, as already stated, a con- cession had been granted in 1837 for a railroad from Vera Cruz to Mexico, — the line which had always been considered indis- pensable, since Vera Cruz had always been the chief port of the Republic ; but nothing of practical import was done until 1877, when the Government wisely began the granting of pecuniary assistance to railroad-building as a regular ofidcial policy.

When the new government of General Diaz took hold of affairs, the only completed through line was the Mexican rail- way, 423.75 kilom. long, from Vera Cruz to Mexico. Besides this, there were the branch to Puebla ; the line from the Port of Progreso to Merida, the capital of Tucatfin ; the short line from Vera Cruz to the Port of Alvarado; and a few kilome- ters of the Mexican ISTational, just starting to Toluca; making a total length in 1877 (including the lines of the Federal Dis- trict) of 672.371 kilom., or 417.5 miles. Ten years afterwards the length of railways was 6,608.809 kilom., or 4106 miles.

The Mexican Hailroad-Ststem.

In 1897 the length was 11,772.642 kilom., or 7311 miles, and in September, 1901, the total was already 16,454 kilom., or 9600 miles.

The amount of subsidies granted up to December 31, 1899,

was :

In cash,

130,145,517 00

In certificates,

28,909,314 53

In bonds.

42,601,546 62

Total,

1101,656,378 15

n. Present Oonbitions.

Grouped under the five systems above sketched out, the various present lines and branches appear as follows :

1. From the Rio Grrande to the City of Mexico.

Miles.

(1.) — Mexican Central: Ciudad Juarez to Mexico City,

1970.44 kilom., 1225

(2.)— Mexican National: Laredo to Mexico City, 1350.44

kilom., 841

(3. ) — Mexican International : Ciudad Porfirio Diaz to Torre-

6n, 616.55 kilom., 383

2. From the Gulf of Mexico to the Table-Land.

(1.) — Mexican Railway : Vera Cruz to Mexico City, 423.75

kilom., 263

(2. ) — Interoceanic Railway : Vera Cruz to Mexico City,

646.602 kilom., 340

(3.) — Monterrey and Mexican Gulf: Tampico to Trevino,

624.64 kilom., 387

(4.) — Mexican Central: Tampico to Aguascalientes (Chica-

lote), 663.5 kilom., 412

(5.) — The Hidalgo and North Eastern Railroad belongs also in this system. It starts at Mexico City and goes to Pa- chuca, branching off at Tepa for Tulancingo, and will eventually reach the Gulf of Mexico at the Port of Tuxpan. Its ramifications, making a unique sy.stem, owned and handled .entirely by Mexicans, amount in length to 212 kilom., 132

3. From the City of Mexico and Neighborhood to the South and South Pacific.

Miles.

(1.) — Matamoros Branch of the Interoceanic: Puebla to

Tlancualpican, 124 kilom., 77

(2.) — Morelos Branch of the Interoceanic : Mexico to Ixtla,

216 kilom,, 134

(3.) — Mexico, Cuernavaca and Pacific : Mexico to Rio Balsas,

292 kilom., 181

(4.) — Mexican Southern : Puebla to Oaxaca, 367 kilom. , . 227

The Mexican Railroae-Ststem.

4. Across the Sierra Madre to the Pacific Coast.

Miles.

(L) — Sonora Eailroad: Nogales to Guaymas, 426 kilom., . 265

(2.) — Rio Grande, Sierra Madre and Pacific : Ciudad Juarez

to Terrazas, 250 kilom., 156

(3.) — Parral Branch of the Mexican Central : Jimenez to

Stallforth, 134 kilom., 84

(4.) — Chihuahua al Pacific©: Chihuahua to Minaca, 200

kilom., 124

(5.)— The Torre6n to Durango line of the International : 253

kilom., 157

(6.) — The Manzanillo Branch of the Mexican Central, now under construction from Guadalajara, has built 192

kilom., 119

(7.) — Occidental Railroad: Altata to Culiacan, 61 kilom., . 38

5. It is unnecessary to mention the various lines and branches that belong in this subsidiary, purely local system, of which the Mexican Northern, between Escalon and Sierra Mojada, may be taken as a type. The branches of the Cen- tral throughout the State of Jalisco, and the ITationars branch to Morelia and Uruapam, in Michoacan, are also of great local importance.

6. A sixth system might be said to consist of the Tehuan- tepec railroad, owned by the government, between Coatzacoal- cos on the Gulf and Salina Cruz on the Pacific, 309 kilom., or 192 miles long — a road that will play an important part in Asiatic trade as soon as these two ports, now in course of improvement, are ready for trans-continental business. This road will be joined shortly to Vera Cruz by the Vera Cruz and Pacific Railroad, which, starting at Cordoba, on the Mexi- can Railway, will connect with Santa Lucrecia, on the Tehuan- tepec. About 200 kilom. (125 m.) of this new road are now built.

III. A Railroad Journey.

Under this head it is proposed to give an account of what can be observed by a traveler following the lines of the Mexi- can railways.* For the sake of clearness and completeness, some features of the topography, etc., already mentioned, are re-stated.

The Isthmian region begins in the Mexican territory, situated south of the United States, between the two oceans. It extends

This sketch includes, but is not wholly confined to, the route of the special excursion trains which brought the Institute party to Mexico.

The Mexican Eailroad-System.

to the south by a series of narrow isthmuses, forming Central America, which was probably formerly joined to the Antilles, and constituted, as has been noted by several observers, a region similar to the Mediterranean zone between Europe and Africa.

The general shape of Mexico is that of a strip of land grad- ually narrowing towards the south, and widening again to the southeast. It branches off towards the Isthmus of Tehuante- pec in a very irregular strip of land, which constitutes Central America, and in another, which extends towards the Antilles, and is called the Peninsula of Yucatan.

The Peninsula of Lower California is a prolongation of the coast-line of the Northwestern States, from which it is actually separated by an arm of the sea called Cortes, whose entrance is formed by San Lucas and Corrientes capes, thus establishing not only a geographical extension, but also a strictly geological dependence.

The most rudimentary idea which could be furnished of the general structure of Mexico would be to compare it with an immense continental plateau supported and bounded by two ranges of mountains parallel and close to the littorals of the Gulf and that of the Pacific Ocean.

Our two large chains of mountains, which are orographic continuations of the Pocky mountains, have a tendency to join in the shape of a V, whose branches are united in the network of mountains of Oaxaca. Naturally, near the vertex of this large V is the highest elevation of the plateau, which gradually declines towards the north.

The two mighty mountain-chains, called by Humboldt the Mexican Andes, and well known as the Sierra Madre Oriental and the Sierra Madre Occidental, are not single ranges. Each is a continued series of groups of ranges, or of isolated moun- tains, separated by canons and deep ravines traversed by tor- rential waters. And they present magnificent forests, where one enjoys all climates giving life to the landscape, or arid slopes, scattered with naked rocks, and containing a network of metalliferous veins, wLich furnished the traditional romantic wealth of the Toltecs, Mexicans, and other opulent aboriginal races.

The great plateau called Mesa Central (1700 meters average height above sea-level and 666,000 sq. kilom. in area) extends from the plains of Texas and New Mexico, in the United States,

The Mexican Railroad-System.

to the base of the volcano of Xinantecatl, oa the Xevado cle Toluca, at the foot of which the central plateau has an altitude of 2600 meters.

Deep, splendid canons through the two great Cordilleras permit the waters of the interior to reach the wonderfully fer- tile and beautiful coast.

The traveler across the extensive desert plains of Texas finds no variation in the landscape on reaching the right hank of the Rio Grande. The cultivated prairies surrounding the well- painted frame-houses where the cow-boy, the Anglo-Saxon ranchei'O, dwells, the humble hut, lost in the immensity of the Mexican plains, and the cabin of the Indian or creole laborer, are not suflicient to relieve the lonely monotony.

Small streams cross the Mexican Central railway, which, after running many miles through clouds of dust, finally reaches an oasis.

Chihuahm . — This city, the capital of the State of the same name, is the most important in northwestern Mexico. Its 20,000 inhabitants are divided between manufacturing and in- dustrial pursuits, and its prosperity is largely due to the neigh- boring mining district of Santa Eulalia, formerly famous, and now inaugurating a new period of prosperous productiveness. The City of Chihuahua has been remarkable since 1718. It is the tomb of many heroes of the Independence.

Going south, the railway skirts the plains of el Bolson de Mapimi, bounded at this part by the Conchos river, one of the afiluents of the Bravo, which crosses the line above the city of Santa Bosalia; three hours afterwards, one reaches the city of Jimenez, an ancient military post of the Colonial epoch, and at present the junction of the Parral branch. Parral is at present one of the most flourishing mining districts of the Republic.

After passing the station of Escalou, the junction of the line to the Sierra Mojada, a rich mining district discovered some 23 years ago, the railway, before reaching the station of Jimulco, traverses the principal cotton district of Mexico, in the region of the plains fertilized by the waters of old lakes, such as Mayran and Tlahualilo, fed by the ISTazas river, which rises in the slope of the Sierra Madre, in the State of Durango, and the Aguanaval river, which empties into the Ratos and

The Mexican Railroah-System.

Parras lakes. This region has been converted into an impor- tant manufacturing and industrial center. Our own generation has seen the rapid growth of business towns like Ciudad Gomez Palaeio and Torreon the latter of which is now the junction of two railroads, of mighty significance and influence in the eco- nomical progress of the country.

Torreon is connected with the City of Durango, from which the road to Mazatlan, on the Pacific Ocean, has been projected and begun. It is also the terminus of the International rail- road, the other route which connects on the IT. S. border, at the City of Porfirio Diaz, with the Southern Pacific. At Eeata, this railway connects with the Gulf railroad, which, touching Monterrey, the capita] of the State of Huevo Leon, and passing through the cities of Cadereyta, Montemorelos and Victoria, arrives at the port of Tampico.

Following the banks of the Aguanaval river, the road leaves the station of Jimulco to enter anew the desert plains, bounded by a horizon of high mountain-ranges, utterly devoid of vege- tation.

Camacho . — To the left of this station the peak of Teira, at the base of which narrow auriferous veins are worked, towers from a large mountain range. Behind this mountain are the Zuloaga, Mazapil, Concepcion del Oro and Candelaria ranges, which contain important mineral deposits of ancient and mod- ern exploitation. To the right of the station of Gutierrez are seen the low foot-hills of the Western Sierra Madre, beyond which are the mining district of Hieves and Sombrerete, of old mineral development.

The plain changes gradually into valleys less arid and better irrigated ; cultivation begins to appear before reaching the low- lands of Calera, which is a continuation of the salt plains and bogs of the village of Cos, and shortly before this the station of Fresnillo is reached, not far from the rich mining district of the same name, discovered in 1554 and worked (especially as to the group of veins of Proano hill) since the 18th century. This mining district has undergone many changes; several important bonanzas were extracted in the first half of the 19th century. The workings having had a great development and impulse, it was decided in 1853 to install there the practical School of Mines for students of the Mining School of Mexico.

The Mexican Railhoad-Systbm.

A little further beyond the station of CaUra the road begins to ascend towards the foot-hills of the Zacatecas range, until it reaches a height of 2442 meters above sea-level, the highest on the line from El Paso to the City of Mexico.

Zacatecas , — The route of the railroad over these mountains presents a wonderful and interesting panorama. Following the ins and outs of the mountains, it frequently invades the mining claims, whose corner-stones look like white dots on the barren slopes of the hills; improvements, such as stacks of boilers, hoisting-works, roads and trails, are noticed everywhere in the vicinity of the shaft-openings. Finally, the eye is sud- denly met by the confused groups of houses of the city, at the bottom of a depression surrounded by high mountains, the most distinguished of which is La Bufa, a mass of rhyolite which crowns the range as a crest.

The cupolas and towers of the churches, the roof of the market and the high fa$ade of the theater tower up in the midst of the houses, which, with their plain roofs, bear at a distance the aspect of a pile of blocks.

This city was founded in 1585; the rich mining district, one of the greatest developed in Mexico, having been discovered by Juan de Tolosa in 1546. Philip 1. granted to the city the privileges which those of Castile used to enjoy.

The mining district is at present in the most deplorable state of decline, as is indicated by the imposing ruins of its mills, many of which are located in the G-uadalupe canon, skirted by the railroad,

Aguascalienies , — The line now descends from the Zacatecas range to enter anew the plateaus where pastures and produc- tive fields abound. Three hours later the traveler begins to distinguish the smoke of the chimneys of the great foundries in the environments of Aguascalientes, capital of the State of the same name, an agricultural and industrial city of 30,000 in- habitants, situated 1861 meters above sea-level, and founded in 1576. It owes its name to hot springs found in the immediate neighborhood. This is a beautiful city, with numerous orchards and churches. Its peaceful inhabitants are devoted to agri- culture and the arts. They are famous as weavers, and for the handiwork of the women, who come to offer their wares at the car-windows.

The Mexican Railroad-System.

South of Aguascalientes, land of a better quality and well irrigated has favored the growth of a number of towns and cities. This region, up to the City of Mexico, is essentially agricultural, and constitutes the most densely populated part of the country.

About an hour after leaving Aguascalientes the traveler passes through the village of Enearnacmi built on the rolling arid hills between the windings of a river, which the Mexican Central crosses by a magnificent iron bridge, sustained by two strong columns 65 meters in height.

Lagos . — This town, the county-seat of one of the districts of the large State of Jalisco, is 1915 meters above sea-level; has an excellent climate and 15,000 industrious inhabitants; and was founded by Francisco Martel in 1563, with the purpose of facilitating the subjection of the Chichimeca Indians, who in- habited that region. It has also a famous church.

Leon. — This, the second city of the State of Gruanajuato, very important for its industries and commerce, situated at the foot of the valley, surrounded by hills and rocky plateaus, was founded in 1576, during the reign of Philip 11. of Spain. The population, which is 60,000 to-day, has been, in prosperous times, as large as 100,000. In 1888 a terrible inundation de- stroyed the greater part of the city, and more than 200 persons lost their lives, while more than 20,000 were made homeless. A national subscription and the honorable efforts of the inhabi- tants have resulted in the reconstruction of the greater part of the town. The tanneries of this city are the most famous in the country, furnishing especially the leather for Mexican sad- dles and the traditional charro ” suits.

Leon is situated in the extreme northwest of a region spe- cially favorable for the cultivation of cereals, by reason not only of its rich soil, of a porous volcanic formation, but also of the remarkable regularity of the rains, giving an opportunity to take advantage, for irrigation, of the waters of the import- ant Lerma river, and some other water-reservoirs.

This region, shaped like a pail or wooden bowl, and bristling with mountains and volcanic hills, bears the name of Bajio and was called in times past the granary of the central part of Mexico. The southern limit of the Bajio proper extends to the city of Queretaro; that is to say, it has a length of nearly 150

The Mexican Railroad-System.

kilom., bounded by strips of rhyolitic plateaus or high moun- tains, such as the Guanajuato range on the east and the Pen- jamo on the west. This is the most densely populated region of the Eepublic. Its numerous plantations, villages, towns and cities, connected by excellent roads, together with the railroad, give the Bajio a commercial and agricultural importance not realized in any other part of the country.

Silao de la Victoria , — After a ride of two hours through rocky table-lands, bounding the fertile plains, which widen gradually, this beautiful city is reached, almost at the foot of the Guana- juato range, celebrated in the annals of the country for the wonderful richness of its veins, which have been worked since the remote days of the Conquest. This town, 1860 meters above sea-level, and now possessing 15,000 inhabitants, was at the beginning a miserable village of Chichimeca Indians, first known by N’uno de Guzman. About 1553 various Spanish fam- ilies settled there, and gave to the place the name of a plant called which grows abundantly in the vicinity. The later name of Silao de la Victoria was given on account of a bloody combat between the armed Liberals and the revolutionary armies of General Miramon. The city is noted for the regu- larity of its streets, the cleanliness and simplicity of its houses, its ample public squares and its beautiful parish church, con- structed in the 18th century. Hot springs are found near the town and on the slopes of the Guanajuato range. Prom the railway station the peak of El Cubilete towers to a height of 2560 meters above sea-level. A branch of the Mexican Cen- tral brings the traveler in two hours to the station of Marfil, above the open canon which ends at the city of Guanajuato.

Irapuato . — This old town, founded in 1547 by an edict of Charles V., is noted for its active commerce, its ’hand-weaving industry, and the beauty of the exterior of its temples. In 1812 it was attacked by the insurgents and almost completely destroyed. In its innumerable orchards are cultivated with special care the strawberries which are principally consumed in the City of Mexico. These orchards are irrigated by water drawn from shallow pools by means of primitive well-sweeps.

Salamanca , — This town is in the center of the Bafio,, on the right bank of the Lerma river, on the broad, low and fertile plain of black volcanic soil which becomes inundated during

The Mexican Kailroah-System.

the rainy season, forming in some places extensive swamps. It has fine churches, and the ruins of an ancient convent ; and its inhabitants are industrious and skillful agriculturists. A street- railway connects it with the city of Valle de Santiago a fertile valley surrounded by extensive, crater-like lakes, called ollas (earthen pots). Valle de Santiago is noted for its specialty of rebozo weaving.

Celaya, — This is one of the largest cities of the Bajio, being next in importance to Queretaro and Leon. It is situated on a plain at an altitude of 1810 meters; was founded in 1570, and was peopled at first by Vizcainos who gave it the Vasco name of Zalaya ; that is to say, ‘‘ Plain-land.’’ The first inhabitants had bloody encounters with the Chichimeca Indians, whom they succeeded in conquering. After that, the population in- creased rapidly, and has been energetically devoted to the cul- tivation of the land, which has been gradually irrigated by the waters of the Laja river, running near the city. Magnificent plantations, covered with huizaches mesquites and other trees, surround the city. It has a number of large buildings, among which is the Carmen church, the fagade of which is of Corinth- ian style, a work of the famous native architect, Tresguerras, born in 1746. In the interior of this church some paintings by celebrated native artists are much admired. Like the other towns of the Bafio region, the inhabitants, besides being agri- culturists, are devoted to the weaving industry. It was in this city that the title of Captain-G'eneral was conferred on Hi- dalgo, the initiator of the Independence, eleven days after the grito de Dolores (Dolores proclamation), when the insurgent army had already reached the number of 50,000 men. The two main railroads of Mexico, the Mexican Central and the national, cross each other at the edge of the city, each having its own station.

Queretaro . — This city, the capital of the State of the same name, situated at the southern limit of the Bafio has 35,000 inhabitants. It is an ancient Tarascan city, was subject to the crown of Montezuma I. about 1445, and conquered in 1531 by Fernando de Tapia. In 1656, Philip IV. conceded to it the rank of a city. It can properly be called to-day the city of churches ; as it has sixteen large ones, many of them contain- ing fine works of art in sculpture, paintings and wood-carvings,

Vol. . — 16

The Mexican Bailroab-System.

which., together with its cloth, blanket and rebozo industry, have made it famous in the past. Close to the city is the large Hercules cotton cloth factory, partly run by water-power fur- nished by a magnificent stone aqueduct. The railroad passes underneath one of its gigantic arches. The construction of this aqueduct was commenced in December, 1726. At present the factory employs 1500 operators.

Queretaro has suffered in recent years a notable decline and loss of its supremacy in its industries. About the middle of the past century it reached a population of 60,000 inhabitants. It has always been an important theatre of political affairs. Here were held the famous meetings which prepared the glori- ous Proclamation of Independence, and in which Dona Josefa Ortiz de Dominguez took an active part. It 1821 it was be- sieged and taken by the Independents under Iturbide. At Queretaro, in March, 1848, the treaty of peace between Mexico and the United States was signed. Finally, in July, 1867, the Archduke Maximilian, and his Q-enerals, Mejia and Miramon, were executed on the hill of las Campanas, a few kilometers from the city — a proceeding which completed the downfall of the empire which Louis Hapoleon had attempted to establish in Mexico.

San Juan del Rio , — This is a small city, 2000 meters above sea-level, and surrounded by good plantations irrigated from the river. It was a center of traffic before the arrival of the railroad, and is still active in the commerce of cereals.

Tequixquiaioan , — The plains and slopes are bounded by high mountains, such as the Galindo range on the west and the Santa Eosa to the southwest, at the base of which the town of Tequixquiapan is surrounded by large mesa-lands and hills, from which are extracted the famous Mexican opals, celebrated all over the world. The fertile and delightful valley is bounded on the north by the majestic peak of Bernal a conical and almost inaccessible mountain, where the rough and extensive Sierra Gorda begins, through whose sinuosities and canons of wild beauty rushes the Moctezuma river, emptying into the Gulf through the paradise of Tampico.

In crossing the region of Arroyo Zareo, the railroad has to overcome new obstacles presented by the ruggedness of the country, either fertile and irrigated, or uncultivated, arid and

Tee Mexican Railroab-System.

rough, and sometimes presenting mountain-slopes covered with extensive forests, which furnish fuel, railroad-ties and lumber.

Tala , — Through numerous curves and tortuous trails the railroad reaches this city, the junction of the Pachuca branch, -crossing the river of the same name. In the environments of the now decayed town, and on its hills covered with volcanic lava, are still found vestiges of one of the most ancient Toltec capitals, Tolldn of which the great priest and founder was the mysterious Quetzalcoatl to whom are attributed magic powers, deep knowledge of truth, and the knowledge of the casting of metals and stone-cutting. We are told that the city already flourished about 800 a.d. The present parochial church of Tula was constructed in the seventeenth century. Its turreted walls give it the appearance of a fortress.

The railroad follows the meanderings of the Tula, or winds through hills covered with lava (which in some places shows columnar structures) until it again reaches the plain on leaving the station of El Salto, To the right is the Ouautitl4n river, flowing over a bed of lava, spongy stone and volcanic ashes eoming out at the portentous, artificial canon, master-work of Enrico Martinez, the Tajo de Nochistongo, justly admired by all travelers who can see it for a moment from the railroad, which runs along a few meters from the edge of the precipice built by the sweat of many Indians and the death of innumerable human victims, to save the City of Mexico from terrible and frequent inundations. That city is located in the interior of a vast basin, without outlet, into which descend the waters of the high mountains which surround it. These waters used to ac- cumulate in large lakes with a very shallow average depth, and little higher than the average level of the city. On this account, frequent and terrible inundations resulted during the rainy season, and more than once almost completely destroyed the city.

Ever since 1580, radical measures have been suggested, from time to time, to save the city from such inundations. Indeed, in the time of the Indians, there existed dikes to retain the water, and retard its access to the old city of Tenoxiitldn, But in spite of these, any accident or washout was sufficient to cause alarm. From the beginning, it was intended to give an outlet to the waters of the north of the basin, which were the most

The Mexican" Kailroae-System.

abundant, and whicli emptied into Znmpango lake — principally tbe waters of the Cuautitlan river.

This project was entertained for many years in an embryo form, until, at the beginning of the seventeenth century, another plan was submitted by the able cosmographer of unknown nationality, Enrico Martinez. His idea was to open a tunnel through the hills and slopes of Nochistongo. In this, work was commenced in 1607, during the reign of Viceroy D. Luis de Velasco, by the employment of innumerable hungry and naked Indians at miserable wages. The tunnel advanced 6600 varas in less than two years; so that in May, 1609, the Viceroy, visiting the works, saw the waters of the CuautitMn river running over the bed of the Tula. It was necessary to wall the tunnel with stone, and to make many repairs, to pre- vent or remedy its frequent obstruction. The plan was, in consequence, almost abandoned. About 1616, w’ork was re- sumed upon it, but was shortly afterwards again suspended until 1625. In 1629 the tunnel was again cleaned out, and once more choked by the waters of Zumpango lake, overflow- ing the city to a height of two meters, drowning 3000 persons, and compelling the emigration of 20,000 families. The city remained inundated until 1631. Philip IV. ordered the aban- donment of the City of Mexico, and the rebuilding of it in a better location ; but as the property was valued at that time at 150,000,000, it was finally decided not to abandon such valuable interests.

In 1637 began the transformation of the old tunnel into the great and wonderful canal, constructed by the labor of hun- dreds of thousands of Indians, which has left to posterity one of the most gigantic works created by man, and which confers deserved glory upon Enrico Martinez. The gratitude of the city has erected a modest but eloquent monument to his memory.

Huehuetoca . — At the railroad station of this town, the canon of NocUstongo is only a few feet lower than the ‘average level of the land; the sombreness of the landscape gives evidence of the poverty of the soil, limy in parts, volcanic in others ; but farther on it changes quickly in the surroundings of CuautitHn, a village which, like Huehuetoca, is in a complete state of ruin and decadence. They were lively towns before

The Mexican Kailr Cab-System,

the railroad took from them the extraordinary traffic of the wagon-road which crosses them, and placed the City of Mexico in close communication with the interior cities of the .RejDublic. This wagon-road appeared like a serpent of dust, and was re- markable in those days for the continuous traffic of carts, car- riages, and all kinds of vehicles, pedestrians, companies of soldiers and bandits. To-day, destroyed, uncertain, and full of stones, it serves as a path to a few burros patiently guided by their masters, and transporting fruits and other products of the neighboring towns.

Tepotzotldn , — This small town, a few kilometers from Cuau- titlan, at the foot of the high hills which bound the horizon west of the railroad, has a magnificent convent and church, erected by the Jesuits before their first expulsion, and particu- larly noted for their beauty and good state of preservation, as well as for their curious, extravagant architecture, not only in the filigreed lines of a magnificent tower and fagade, but also in the splendid gilding of the altars of the temple. In the cloisters and chapels of the convent are a multitude of paint- ings. Perhaps the wooden sculptures, including especially the carving of an organ, and a small set of chairs of rich and delicate design, are more to be admired. A small chapel, ad- joining the church, shows the same curious, extravagant style of architecture, resembling, in its variety and richness of color and profusion of figures, the ancient orthodox churches of the City of Mexico. This place is deserving of attention, but, un- fortunately, is seldom visited.

Lecheria is reached a little further on, almost at the foot of the eastern slope of the Guadalupe range, which enters the val- ley of Mexico, interrupting the plain and appearing to divide the southern portion of the valley.

The railroad here has to ascend the first incline of the range and wind up the hills to reach the top of the Giiesta de JBariieM- tos of the old cart-road, from which can be admired the mag- nificent profiles and sinuous heights bounding the valley of Mexico, and the extensive forests and vast fields of corn at the bottom of the valley, interspersed with groups of trees, among which, half-concealed, tre grouped the small villages over which tower high white spires.

Finally there may be discovered in the distance Ohapultepec

276 Patio Process Eor Amalgamation Op Silver-Orbs.

hill, with its castle, and at one side the massive black towers of the Cathedral and the blocks of houses, like walls of stone, which mark the site of the City of Mexico, the ancient capital of the vast Mexican Empire.

The Patio Process for Amalgamation of Silver-Ores.

Rt Mantjel Valerio Ortega, City Op Mexico.

(Mexican Meeting, November, 1901.)

Introduction.

This Mexican amalgamation-process, invented in 1557, at Pachuca, hy Bartdlom de Medina, has been widely discussed in America and Europe, hut thus far there is no universal agreement as to all the chemical reactions involved.

Having been, after many trials, the first to succeed in efiect- ing the amalgamation of silver-ores by the same mechanical means, but doing without one of the chemical substances which had been considered indispensable in the practice of 800 years, I am led to ofier these notes as a contribution to the discovery of an exact theory concerning the patio process.

My treatment for silver- and gold-ores being protected by letters-patent in this country, the United States, Eranee, Peru, Bolivia and Chile, I may speak freely concerning its materials and manipulation.

I. Patio-Amalgamation.

The ore extracted from the mine is sorted hy pepmadores who break the large pieces with hammers, rejecting those which contain no ore, set aside the very rich to he smelted, and deliver the rest to he crushed and pulverized for direct amal- gamation in the patio. The broken lumps, of about fist-size, are first ground in Chilean mills, and then reduced, in arrastras or tahonas, to fine slime.

After the lama or slime has acquired a suitable consistency hy the evaporation, through the sun’s heat, of a part of the water which it contained, it is spread upon the patio or amal- gamating-floor, where it is mixed with 5 or 6 per cent, of com- mon salt. The next day a certain amount (depending upon

Patio Peogess Foe Amalg-Amatiok Op Silvee-Oebs. 277

the nature of the ore and the season of the year) of bluestoiie (cupric sulphate) is added ; and, immediately afterwards, mer- cury, in the proportion of eight units to one of silver contained in the mineral, squeezed through a piece of thick cloth or chamois skin, and spread over the pulp or torta. These chemi- cals are thoroughly mixed with the slime by means of horses or mules trampling the torta — an operation called the repaso and repeated daily until the treatment is finished. The time required is from two to five weeks, depending upon the quality of the ore, the temperature of the locality, and the period of the year.

Samples are taken at intervals for assay by washing in a vanning-bowl ; and when the tests show that amalgamation is too slow, more bluestone is added ; if it be too active (from the presence of copper sulphate in excess, as indicated by gray color and floured mercury), it is retarded by the introduction of lime, cement-copper or wood-ashes. At the end of the process, it is usual in some places to make a final considerable addition of mercury, in order to collect the grains of amalgam.

Amalgamation being finished, the torta is transferred to deep circular stone vats, or settlers, through which water is passing, agitated by a revolving paddle. The amalgam and other heavy metalliferous materials collect in the bottom, while the light, earthy impurities are held in suspension and carried away.

The fluid amalgam thus obtained is squeezed through canvas bags, whereby the excess of mercury is forced out, and there remains a solid or pasty argentiferous amalgam, containing about one-fifth of its weight of silver. This is compressed into triangular segments, which are transferred to the quemaderas or retorting-houses, for the separation of the mercury by heat.

n. Chemical Thboey of the Patio Peocess.

Prof. Greenwood, in his Manual of Metallurgy says the chem- ical reactions in the patio are not well understood, but

“The first object is to convert the argentic sulphide (Ag 2 S) into chloride, ef- fected by exposing a mixture of argentic sulphide and common salt to the action of air and moisture, as in the first stage of the process, when an amount of argentic chloride is produced ; and again, on the addition of magistral the active constituents of which are cuprous [cupric] sulphate and ferrous sulphates, double decomposition ensues, with a- rise of temperature and the production of cupric chloride (CuCls) and sodic sulphate, thus —

Cu 0 ,S 03 + 2NaCl CuCb + ;

278 Patio Process For Amaloamation Of Silver-Ores.

wMle the cupric chloride so produced, in the presence of cuprous [cupric] sul- phate and sodic chloride,* converts argentic sulphide into chloride, probably in the following manner —

AgS -f 2CuCl2 2AgCl + CU2CI2 + S ;

while the resulting cuprous chloride (CugCla), together with a further proportion, probably formed by the reaction of silver upon cupric chloride, thus —

2CUCI2 + 2 Ag 2AgCl + CU2CI2,

in the presence of air and sodic chloride, reacts upon a further portion of argentic sulphide, with the production of argentic chloride and a greenish -white residue of oxychloride of copper,

2Ag2vS + 4CU2CI2 + 60 4AgCl -f 2 (CuCI + 3CuO ) -f 2S.

argentic chloride formed, as the result of these reactions between argen- tic sulphide, sodic chloride and cupric chloride from the magistral is then acted upon by the mercury added for the amalgamation with the production of mercur- ous chloride (HggClg) and metallic silver, which amalgamates with the excess of mercury present — ”

2AgCl -f- 3Hg HgCla + AggHg.

Let US examine this theory. The author says the object of the salt is, in the first place, to convert the argentic sulphide into chloride, and then to form cupric chloride, in order to con- tinue the same operation.

I do not see the necessity of adding bluestone, if the chlor- ination of the silver can be affected with salt alone ; and since, in practice, so far as I know, argentic sulphides are never treated with salt alone, I think we may at once reject, that idea.

That chloride of sodium and cupric sulphate form by mu- tual decomposition cupric chloride and sodic sulphate is true; but that this cupric chloride, under the conditions of the treat- ment, will convert the sulphide of silver into chloride, I cer- tainly deny. When cupric chloride acts directly on the artificial sulphide, in the absence of other substances, such reaction does take place; but the experiments of Karsteii and Boussingault prove that, in the practice of the paio, it does not occur. This is further shown by the following experi- ment cited by Mr. Uslar in his Ensaye sohre la Amalgamadon en Toneles:

Permit me to ask, Under what law is only part, and not all, of the cupric sulphate converted into chloride ?

Patio Peooess Poe Amalgamation Of Silver-Ores. 279

To a certain amount of ground ore tliere was added twice tlie ordinary quan- tity of salt. Eight days after, the necessary magistral (burned iron and copper pyrites, frequently used instead of bluestone) was mixed, and the treading of the pulp was continued for fifteen days more, when metallic iron was added and the treading prolonged for two days. Then the mercury was mixed ; but there ap- peared no signs of amalgamation ; and after eight days the whole thing was washed out, and the mercury came out without any silver. So, then, it is untrue that, by the united action of the salt and cupric sulphate, silver chloride is pro- duced, which is reduced by the mercury ; because it ought to be formed with the quantities of chemicals used ; by the iron it ought to be reduced quicker than by the mercury j and there should not have been any consumido — that is, loss of quicksilver by chemical change j but nothing of the kind occurred.’

In our theory, we accept the first of Mr. Greenwoods reac- tions,

2IIa01 + Cu 0 ,S 03 Nap,S 03 + CuOl,, but not the second.

What, then, is the object of the cupric chloride? In my opinion it acts on the mercury, converting it into mercurous chloride (calomel), itself becoming cuprous chloride —

OuOl, + Hg CuCl -f HgOl.

Mr. Fernandez, in his Teoria del Beneficio says :

“When in the solution of salt and hluestone that we are studying we add a certain quantity of mercury and the liquid is shaken, there appear two kinds of precipitates, both white ; but the first one is heavy, and the other floats for a long while ; the one is blackened by ammonia, and the other is dissolved at last, and imparts a blue color to the ammonia. At the same time the mercury is subdi- vided and becomes gray, and sometimes black ; if it is washed and rubbed hard, it separates the same white, heavy substance that we have mentioned ; this is nothing hut calomel, and the other is pure cuprous chloride.*’

Hot all the cupric chloride formed is converted into cuprous chloride ; for the reaction can take place only by direct con- tact, and the volume of mercury is very small, compared with that of the pulp. Moreover, the solution of cupric chloride is weak ; supposing that for each ton of ground ore containing 700 kilos of water, 3 kilos of bluestone were used, the cupric solution would not be over 0.5 per cent, in strength.

On the other hand, the accident known in practice as calen- iura which is recognized by the rapid formation of mercurous chloride, is due to an excess of cupric sulphate; whereas, if the cupric chloride formed by it acted on the silver sulphide, the effect would be only to hasten the amalgamation, without injuring the quicksilver at all.

280 Patio Process For Amalgamation Of Silver-Ores

Again, it is "well known that when horn-silver is submitted to the imtio process it encounters the same accident, owing to the stronger affinity of chlorine than of silver for mercury ; and if such a thing happens to the combination of silver and chlorine already made, how can we admit that the cupric chlo- ride will act on the argentic sulphide in proportion to metallic mercury ?

According to my theory, the second reaction must be this : CuCl, + Hg CuCl + HgOL

Assuming that this is the case, the question arises, Does the cuprous chloride chloridize the argentic sulphide? By no means. Domeyko says :

Cuprous chloride, either in powder or dissolved, reduces silver sulphide with the production of cupric chloride, native silver and cuprous sulphide.”

As this was the last resource left to the defenders of the theory of chlorination on the we may conclude that chlor- ination does not occur; but, to give more value to this conclu- sion, I will mention some other proofs.

1. The conversion of argentic sulphide into chloride is not necessary. It is intended to facilitate the reduction of the sil- ver by the mercury ; but this is more easily accomplished (under the same circumstances) with the sulphide alone. Malaguti and Durocher say :

The reduction of silver chloride by means of mercury is very slow, especially if there is no water present, while argentic sulphide is reduced even by mere contact.”

2. native chloride of silver (horn-silver) never has been treated successfully on the 'patio. This difficulty was the origin of the caso or caldron process, invented by Barba, in which, as is well known, the native silver chloride is reduced by the metallic copper of the apparatus, and not by the quicksilver. Tet, according to the theory we are analyzing, horn-silver ought to be the best ore for the paiio since nature has already pro- vided in it the chemical combination attributed to the salt and bluestone of that process.

3. To show how difficult it is to treat artificial chloride of silver by the patio I made the following test : In the lixiviation-

Patio Peocess For Amalgamation Of Silver-Ores. 281

process, the ores are chloridizecl first, in order to extract the silver by a solution of sodium hyposulphite. I took a ton of ore so prepared, and worked it with mercury only, as the silver was already converted into chloride, and there was no need of chemicals to chloridize it. After a month’s treatment there appeared no trace of amalgamation. I then added the usual amounts of salt and bluestone. There was an imme- diate change in the appearance of the mercury, which became coated with a gray, opaque film ; but, notwithstanding this, it did not catch any silver; and when washed out, after two months’ treatment, half the weight of the quicksilver had been lost, and the remainder contained very little — almost nothing — of silver.

4. If there were really, in the atio a formation of chloride of silver, subsequently reduced by the mercury, the loss of mer- cury should be 1.85 times the weight of the silver obtained. This is not the case. In the majority of instances the total loss of quicksilver, including the inevitable waste in the several manipulations, is between 1.25 and 1.5 times the weight of silver obtained.

5. In the mso, as well as in the Freiberg barrel-process, where the ores contain silver in the state of chloride, either natural or artificial, the loss of mercury is very small, say from 5 to 10 per cent, of the silver, because in those processes the reduction of the chloride is effected by the metallic copper or iron ; but when those metals have been tried on the patio the result has been negative. In this respect Mr. Uslar says :

‘ ‘ The object of another series of experiments was to protect the quicksilver by means of metallic copper and iron, but the results were entirely different from what we expected. Where there was iron there was no amalgamation; a small quantity of copper seemed to do good, the loss of quicksilver being somewhat less ; but the amalgam contained a certain amount of copper, and if the quantity of this metal was increased, the resulting amalgam contained no silver, but copper.’’

The explanation of all this is very clear. Probably the iron was added in excess, and all the cupric chloride was reduced ; and, when copper in small quantity was used, some cuprous chloride was formed ; but when copper was added in greater quantity, it amalgamated before the silver.

6. In the tortas under treatment there has never been found a single particle of chloride of silver, notwithstanding it has

282 Patio Process For Amalgamation Of Silver-Ores.

been looked for with positive care. It can scarcely be argued ttat this is the result of the reductiou of the argentic salt by the mercury; because immediate contact between the two is impossible, since the argentic chloride should be dissolved in statu nascendi in the brine with which all the mass is impreg- nated. There cannot be, therefore, an instantaneous and com- plete reduction by mercury to explain the observed absence of aro-entic chloride in the torta — which thus constitutes a strong argument against the formation of that salt in the patio pro- cess.

In 1887, while a student at the Columbia School of Mines, I published a pamphlet, entitled Manual del Azogiiero, in which I tried (as some other authors had done) to explain the reac- tions of the patio by the formation of argentous chloride (Ag,01); but I was convinced afterwards that, although such a salt exists, has been found native, and is (according to Sonant’s Diccionario de Quimica) the basis of photography, it is insoluble in brine, and ammonia decomposes it into argentic chloride and a very small portion of metallic silver.

If silver, then, is not chloridized in any forni’, what is, then, the office of the cuprons chloride in the patio process ?

Domeyko’s answer has been quoted, to the effect that cuprous chloride reduces sulphide of silver with production of cupric chloride, native silver and cuprous sulphide. I agree with him regarding the production of metallic silver, which is the main purpose of the process, since that is the only condition in which amalgamation is possible. But more complex reactions here involved may require some changes in the simple formula rep- resenting the direct action of one substance upon another.

How does the cuprous chloride reduce the argentic sulphide ? It is well known that all the cuprous salts absorb oxygen from the air, and unquestionably to such a property the I’eduction may be attributed. I will then set down the last reaction that, according to my theory, occurs in the patio process, namely :

OuCl + 40 + Hg -I- AgS CuOl -f Hg 0 ,S 03 + 2Ag.

In other words, the important function of the cuprous chlo- ride is similar to that of nitrous acid in the manufacture of sul- phuric acid, being only the conductor of oxygen absorbed from

Patio Process For Amalgamation Of Silver-Ores. 283

the atmosphere, first to oxidize the mercury, and, secondly, to produce sulphuric acid with the sulphur of the argentic sul- phide, leaving the silver in the nascent state to form amalgam with the excess of mercury.

At first sight it seems that the loss of quicksilver should be large if this reaction occurs ; but that it is, in fact, much less than the so-called consimiidOj which is unit per unit, will appear from the two formulas corresponding to argentic sulphide and mercuric sulphate respectively :

AgS 87.09 Ag and 12.91 S.

HgO, SO 3 67.56 Hg; 5.41 0; and 27.03 SO 3 .

The oxidation of mercury explains perfectly the accident called/™ in the amalgamation, which is characterized by the yellow and sometimes black color of the quicksilver,* as due to the insufficient strength of the cuprous solution to produce the sulphuric acid, with which the oxide of mercury must combine. This is the reason that amalgamation stops, and to remedy this defect more bluestone must be added.

It may be objected that mercuric sulphate never has been found in the tortas ; but the reason is, that as soon as it is formed it is converted into mercurous chloride, on account of the excess of chloride of sodium present. It is well known that mercuric sulphate is sometimes employed to prepare cal- omel by the method of Haermstedt and Planche.

It may be further objected : If there is no chlorination of the silver, what is the use of such an enormous quantity of salt ? I think the object of that strong solution of chloride of sodium is to dissolve the cuprous chloride to facilitate its oxidizing action. According to data published by Dr. Sterry Hunt, the solubility of this chloride in a solution of salt increases remark- ably with the strength and temperature of the latter. More- over, in the pan method very little salt is used. Mr. Eissler 8 ays:t

“ Ten pounds of salt is put in each pan to treat half a ton of ore, at a tempera- ture of 180° F., which quantity is about 20 per cent, of the salt used in the patio at the ordinary temperature.’

The yellow oxide constitutes a variety somewhat different from the red oxide of mercury. See Sonant’s Diecionario de Quimica p. 219.

t The Metallurgy of Silver , p. 120.

284 PATIO PROCESS FOR AMALaAMATION OF SILVER-ORES.

It is on this account, also, that the pcctio treatnicnt takes longer in winter than in summer, namely : the lower tempera- ture diminishes the amount of cuprous chloride dissolved.

For direct proofs of my theory, I must again refer to my process of amalgamation, invented in 1893. In this system there is no chlorine used in any form. Srs. Don Carlos F. de Landero and Don Guillermo de Dslar, in May, 1898, certified as to the good results of this process, with reference to thirteen series of charges treated in barrels in the San Miguel de Regia reduction-works. In Sr. Dslar’s report the following statement ;s made :

‘‘Regarding tlie chemicals used, Sr. Ortega excludes salt (jyaCl) entirely ; and for this reason this process overthrows the opinion of some metallurgists, ac* cording to which amalgamation cannot take place without the application of chlorine.”

The substance of which I avail myself to carry out the amalgamation, whether the silver is in the state of sulphide, chloride, or any other combination, is a hyposulphite of copper, which acts exactly in the same manner as the cuprous chloride, and is easily prepared at ordinary temperature, without the aid of mercury. For this reason, the loss of mercury is smaller than in the old process. Moreover, this salt is very energetic in its action, and hastens amalgamation in such a wonderful way that I have had tortas in the patio that I have treated in a single day, saving 95 per cent, of the assay value of ore.

My process has not been introduced or adopted in many places for two reasons : first, the well-known resistance always opposed to what is new ; secondly, the natural reluctance of the proprietors of reduction-works to pay a small royalty for the use of a process, when, as they candidly say, they do not have to pay anything to Bartolome de Medina. I must con- fess, however, that some establishments have employed all their resources to try my process. Often I have met with great difiiealty from the reactions of the grinding-apparatus, when this has been made of iron instead of the best steel. In such cases, as may be easily guessed, the cuprous salt has been im- mediately decomposed by the metallic iron ; and more chemi- cals have been necessarily used, making the process too expen- sive for profitable use. But this difficulty is not insurmount- able ; and I hope to overcome it very soon.

STRUCTURE OF ORE-BEARIXa VEINS IN MEXICO.

In places where the grinding of the ore is done in arrastras my process has given splendid results. Since 1895 it has been used in the Proano reduction- works, where more than 100 tons of ore, containing silver in the state of sulphide, are treated daily in the works of Messrs. Felipe Eodriguez and Bernardo Saldana, at San Juan de Q-uadalupe, where only horn-silver is dealt with.

There are other places where this new process is employed, with or without my consent.

Notwithstanding such difficulties and drawbacks, I shall be satisfied if this paper shall convince its readers that there have been errors in the accepted theories of Mexican amalgamation, and if the twenty years which I have dedicated to these inves- tigations shall prove useful at some future day to the mining industry in general, and especially to that of my own country.

Notes on the Structure of Ore-Bearing Veins in Mexico.

By Edward Halse, Puerto Berrio, Colombia, South America.

(Mexican Meeting, November, 1901.)

Normal banded structure,* exhibiting bands or layers of mineral symmetrically arranged from the sides to the center of the vein, appears to be by no means common in the Republic of Mexico.

When the bands of quartz form interlocking crystals in the center comb-structure ”), the evidence that the filling has taken place in an open space is complete. This also applies in the case of any mineral the fibers of which are perpendicu- lar to the walls, and which presents here and there, in a cen- tral line, cavities or vugs lined with crystals (geodes) ; but it does not follow that the whole width of the banded vein rep- resents that of the original open fissure. The opening and filling may have been slow and gradual processes, advancing

Termed also veined, jointed or ribboned structure ; French, stmcture ru-- bailee j zones concrHionnBs parallUes ; German, gehamderte Struhtur (or Gefuge) ; SpmiBh, estructur a handeada, cinteada, or eoncreGcionada — tbe “ crustificatiou,’’ in part, of Prof. Posepny.

Structure Of Orb-Bearins Veins In Mexico.

simultaneously ; or the fissure, having been once filled up with mineral layers, may have been re-opened and re-filled, along certain lines, with later minerals.

As examples of “simple symmetry” (Von Cotta), may be quoted certain portions of lodes in Cardiganshire, South Wales, where the filling from either wall to the center of the vein is successively blende — galena — quartz (the last exhibiting comb- structure) ; or, crystallized quartz — blende — galena — calcite; but, as Warrington W. Smyth* observed, the bands, as a rule.

Fig. 1 Fig. 2

Gold- and Silver-Vein, 3 miles south of Same Vein as Fig. 1, Scale, 1 in. 1 ft.

Zacatecas. Scale, 1 in. 1 ft. a, Quartz ; 6, Calcite ; c, Ribbony

a, Quartz with ribbony streaks of sul- streaks of sulphides,

pbides in center j 6, Calcite.

do not keep the same relative positions for long distances either vertically or horizontally.

"Wernerf long ago observed the following at Segen-Gottes, in Saxony, where normal banded structure is seen to great per- fection, viz. : crystallized quartz, black blende with iron pyrites, galena, brown spar, galena, gray silver-ore (argentiferous fablore ?), ruby silver, argentite, calcite, so that the vein con- tains, in all, seventeen bands of mineral, symmetrically ar-

‘‘On the Mining District of Cardiganshire and Montgomeryshire,’ Mem. Brit Geol Su'rv.j Vol. ii., Part 2, page 655 (1848). t Neue Theorie von der Entstehung der Giinge, Freiberg, 1791.

Structure Of Ore-Bearinu Vems In Mexico.

ranged from the sides to the center. He remarked that some- times one or more of the different layers is wanting.

It is noteworthy that in both districts blende usually takes the inner side (Le., the side toward the center) of quartz; ga- lena that of blende; and calcite that of galena; with the ex-

Vein in the Neighborhood of Figs. 1 Vein Parallel to Fig. 3, at Depth of and 2. Scale, 1 in. 4 ft. 90 ft. Scale, 1 in. 4 ft.

€(, Quartz with sulphides ; 5, Altered a, Quartz with ribbony streaks of sul- country-rock ; c, Clay selvage. phides ; b, Calcite.

ception that at Segen-Gottes silver-ores have been deposited between the two minerals last mentioned.

Fig. 1 shows the structure of a portion of a gold- and silver- bearing vein, about three miles south of the City of Zacatecas.

Fig. 5

Same Vein as Fig. 4. Scale, 1 in. 4 ft. cf, Bands of quartz and ore ; a'', Ditto, becoming impoverished near the walls, r, r ; 6, Bands of pure quartz.

It looks like a case of simple symmetry ; but the quartz, con- taining the ribbony bands of argentite and fine native gold, is crystalline, not crystallized ; and the calcite, forming the center of the vein, although it has partially crystallized out in large imperfect rhombohedra, has no median line of geodes, von. XXXII- —17

288 Structure Of Ore-Bearinc Veins In Mexico.

Fig. 2, from the same vein, shows three bands of quartz, al- ternating mth three bands of calcite (thickness, 9 in.), the quartz forming the center of the vein. The remarks made Fig. 6

MW a a cc a a a a a SE

Example of Banded Structure, Taviches Silver District, Oaxaca.

Scale, 1 in. 4 ft.

a, Quartz-veins and stringers ; hj Altered hornblende-andesite.

concerning Fig. 1 apply here also. Moreover, quartz lies on the foot-wall, while calcite lines the hanging-wall ; and the gold is confined to the quartz. It appears as if the calcite were a

Fig. 7

Section of the Calicanto Vein, Pachuca, at Depth of 722 ft. r, Pyroxene-andesite country-rock ; c, Sterile white quartz. The selvages beyond r on both walls are crushed quartz and clay.

later filling, the result of the re-opening of the vein. The country-rock* seems to be a chloritic schist impregnated with iron pyrites.

Prof. C. Le Neve Foster points out that to use the words country-rock is to be guilty of tautology (A Text-Book of Ore and Stone Mining, 1st. ed., p. 10). According to Courtney, country in Cornwall means ground ; when the side of a

Stetjctuee Of Oee-Beaeitg Veins In Mexico.

Fig. 3 represents tlie structure seen in a neighboring vein. Here two layers of gold- and silver-bearing quartz are separated by 6 in. of altered country-rock, while a thick clay selvage marks the hanging-wall. The opening of the central band of country, and its gradual substitution by calcite, would produce from this structure filling similar to that sketched in Fig. 1.

Fig. 4 is taken from a parallel vein at a depth of 90 ft.

Banded Structure, Cardiganshire, South "Wales.

Scale, 1 in. 2 ft.

a, Quartz-yeins and stringers ; 6, Quartz and galena. The white bands not lettered at the top represent country-rock. N and S at the top mean North and South.

Here calcite forms the center of the vein, and the same mineral lines the walls.

The evidence that a given banded structure has been pro- duced by the re-opening of the vein is sometimes of a clearer nature. In Fig. ’S* it would appear that the vein, after having

hill forms the back of a house, the latter is said to be built against the country. But the word is derived from, the Latin, contra, over against ; and surely we may use the term country-rock as meaning the rock against — or by the side of — the vein, in which sense it will correspond almost exactly with the German, Nehmgestein.

Taken from Fig. 2, page 61, of ‘El Mineral de Pachuca,” Bol. del Inst. Geol. de Mexico, Nos. 7, 8 and 9, 1897. Compare with above Fig. 4 of the same work, where, the re-opening having been irregular, no banded structure has been produced.

Strugtueb Of Ore-Bearing Veins In Mexico.

been filled with, quartz and argentiferous sulphides {azogues), was fissured or eroded in planes parallel to the walls ; and that quartz, which is more hyaline than that of the rest of the filling, was subsequently deposited in the cracks.

An interesting example of six banded combs of quartz, pro- duced by successive re-opening of the vein, was observed by De la Beche* in Cornwall, England. He says ; “ A close in-

Scale, 1 in. 2 ft.

Quartz-veins, with a little galena and blende, here and there ; 6, Quartz, cerassite and galena ; c, Quartz, with galena and blende. At the top, between c and a, a small mass of blende is indicated bj shading contrary to that which rep- resents the cleavage of the clay-slates of the conn try- rock vein-filling.

spection of the quartz crystals forming combs, by interlocking towards their central parts, often shows the gradual increase the crystals have received in the direction of. the axes of the prisms; and sometimes small sprigs of copper-ore or blende may be seen entangled among them, in lines corresponding with surfaces which existed during the formation of the comb,

Report on the Geology of Cornwall Devon, and West Somerset. See also James D. Banas Manual of Geology, 4th ed., Fig. 309, p. 333. Other examples of banded structure are shown in Figs. 307 and 308 of the same book.

Stkucturb Of Ore-Bearing Veins In Mexico. 291

as if, while the crystallization of the quartz was effected, the siliceous solution sometimes contained the elements of the bi- sulphuret of copper, and was sometimes without them ; or, if it

Occurrence of Manganese-Ore near Mule, LoAver California.

Scale, 1 in. ft.

a, Pyrolusite ; 6, Altered olivine-basalt ; c, Pjrolusite with gypsum.

always contained them, that conditions were often unfavorable for their deposition on the sides of the cavity holding the solution.’’*

Section of Silver-Vein near Matap, Sonora, at Depth of 52 ft.

Scale, 1 in. 4 ft.

Pay-streak ; b, Quartz with sulphides ; c, Altered granite ; d, Clay selvage.

Banded structure sometimes appears to have been produced by the simple fissuring of the country, the fissures, at a later date, having become filled with one or more minerals.

Op. city pp. 341, 342.

Structure Oe Ore-Bearing Veins In Mexico.

Fig. 6 is an example from the Taviehes silver-district of Oaxaca. A number of thin veins of quartz, parallel with the walls, are separated by hard hornblende-andesite.

Fig. represents a section of the Calicanto vein, in Pachiica,

Same Vein as Fig. 11, at Depth of 141 ft.

Scale, 1 in. 4 ft.

a, Pay-streak ; 6, Quartz with sulphides ; c, Altered granite ; d, Clay selvage.

at a depth of 722 ft. (220 meters). Here the walls are marked by selvages of clay and crushed quartz ; the country-rock is pyroxene-andesite ; and the veins of quartz are fewer and wider than in Fig. 6.

Section of San Augustin Vein, Tehuilotepec District, Guerrero, Mexico.

CD, Limestone with stringers and spots of ore.

For the purposes of comparison, Figs. 8 and 9t are included, being instances carefully sketched hy me in 1881-2, in a mine

‘El Mineral de Pachuca,’’ Fig. 1, p. 69.

t Copied from Diagrams 1 and 3 of a paper published in Bep. Boy. Cornwall Polyt. Soc. for 1884. The remaining diagrams illustrate the same phenomena.

STRUCTURl OF ORE-BEARING- VEINS IN MEXICO. 293

ill Cardigan sMre, S. Wales, at a depth of about 180 ft., and below water-level. A few joints are visible, which contain no quartz ; moreover, there is a band of ore (galena, or galena and blende), as well as a slight mineralization of the rest of the

Remedios Vein, Same District as Fig. 13.

Scale, 1 in. 4 ft.

a, Argentiferous marcasite, argentite, proustite, blende, and copper pyrites, in quartz and calcite ; 6, Limestone with stringers and spots of ore.

filling; hence a later phase in the history of the vein appears to be revealed. The main filling is metamorphosed clay-slate of Silurian age — the country-rock of the district. In Tig. 9 the quartz stringers have a radiated appearance, as if there

Section of Ore-Vein of Pedregal Mine, near Tasco, Guerrero, Mexico.

Scale, 1 in. 4 ft.

n, Blende, galena, proustite, argentite and quartz ; 6, Mineralized calcareous schist

had been considerable local pressure acting obliquely on the foot-wall just below the section represented. The faint lines indicate cleavage-planes, which are visible in the surrounding formation. In other parts of the same vein “longitudinal

Stetjctubb Ob Orb-Bearing Veins In Mexico.

joints are the representatives of the crystalline quartz-veins of the harder portions of the lode.” In none of the examples given in Figs. 6 to 9 would it appear that the country occupies a pre-existing cavity : it is evidently in situ.

Fig. 10 is an example of an occurrence of manganese-ore near Muleje, Lower California. Olivine-basalt forms the coun- try and, in this ease, the main filling. Other veins in the same district show bands of quartz, gypsum, and pyrolusite, which appear to have replaced the eruptive rock.*

The most common type of banded structure is that produced by metasomatic processes in the country or in the vein itself.

Same Vein as Fig. 15, Showing Complicated Structure, Due to Vesicular Country-rock.

Scale, 1 in. 8 ft.

Quartz whicli has partially or wholly replaced schistose rock frequently has a laminated or banded structure.

Examples of this, termed ribbon-rock,” are frequent in the Mother Lode of California. W. H. Storms, f referring to the Hite mine opened on the East lode, says ;

‘ A banded appearance of the quartz, probably induced in part, at least, by the original slaty structure of the rock, which has been replaced by silica, is very noticeable and persistent throughout the mine.”

Eigs. 11 and 12, from a silver-bearing vein near Matape

Trans. Fed. . M. F. vol. iii, Plate LX., Figs. 2 and 3 (1891-2), of which Fig. 2 may be an instance of normal banded structure, as the filling from either wall to the center is crystallized gypsum, crystalline quartz and pyrolusite, with white concretionary sulphate of lime forming vugs ; nevertheless, the vesicular nature of the rock must be taken into account.

t “California Mines and Minerals,” San Francisco, 1899, p. 368.

Stbuctijee Op Oee-Bearino Veins Ik Mexico.

Sonora, at a vertical depth of 52 and 141 ft., respectively, are examples of roughly-banded structure produced, probably, by the partial replacement of country-rock. The country is an

Section of Vein on the Same Line of Fracture as Figs. 15 and 16.

Scale, 1 in. — 4 ft.

Quartz with scattered pyrargyrite, and some malachite and azurite ; 6, Quartz-rock ; c, Red clay.

altered granite ; and the ferruginous quartzose streak on the foot-wall in Fig. 11 appears in Fig. 12, below water-level, as quartz sprinkled with sulphides. Moreover, the clay selvage

Replacement-Vein, in Santa Cruz de Alaya District, Sinaloa.

Scale, 1 in. 4 ft.

a, Sulphides with quartz and calcite ; 6, Mineralized limestone ; c, Cherty lime- stone in siliceous layers, crossing as shown.

on the hanging-wall is milch thinner in Fig. 12, while the band of ore next to it has increased in width. The clay gouge may be regarded as evidence that considerable movement has taken

296 Steuctuee Of Oee-Beaeing Veins In Mexico.

place on the hanging-wall side, whereby the granite immedi- ately below was no doubt fissured and crushed, giving access to the mineral solutions which gradually replaced the crushed zone. The ore on the footrwall side may have been formed at a difterent period.

"Where the filling consists of porous rock, ore may occur in it in threads or stringers, or it may contain minerals scattered through it. Fig. 13 is an instance of the former type, observed in the San Augustin vein of the Tehuilotepec district, near Tasco, Guerrero, Mexico. The main filling is Cretaceous lime- stone, containing a good deal of calcite in large rhombohedral

Anotlier Vein in Same District as Fig. 18.

Scale, 1 in. 4 ft.

a, High-grade ore; Second-class ore ; c, Cherty limestone in siliceous layers, dipping as shown.

crystals. The ore consists of threads of fine-grained argentif- erous galena ; marcasite, with some chalcopyrite ; blende, and crystals of proustite.

Examples of limestone filling with disseminated silver-ores have been observed by me in the district of Santa Cruz de Alaya, Sinaloa. More frequently, however, in such rocks, sub- stitution appears to have taken place along one or both walk, producing a banded structure. Fig. 14 shows the structure of the Remedies vein, in the Tehuilotepec district. Here the limestone filling between the ore-bands contains scattered por- tions and some stringers of ore. In Fig. 15, from one vein of the Pedregal mine, near Tasco, calcareous schist forms the filling between the bands.

When the country-rock is vesicular, isolated patches and

Structure Of Ore-Bearikg Veins In Mexico. 297

spots of ore may occur. In the Taviches district Oaxaca, al- ready referred to, the andesite country not infrequently exhibits more or less rounded cavities. In one lode examined, these were filled with quartz which had crystallized out in a radiated spherical mass, a little piece (mosea) of pyrargyrite {jpetlanque

Fig. 20

Section of Maravillas Vein, Pachuca, at Depth of 328 feet. r, Foot- wall, impregnated with ore ; a, Ore with a little quartz ; d, Calcite with -qiiartz ; e, Iron oxide and clay. Between r and a is a band of amethystine quartz.

oscuro) frequently forming the center.* The main filling is hard hornblende-andesite, with filat layers of calcite and hard red clay with disseminated small crystals of selenite. Threads

Banded Structure by Beplacement, with Silicification, Papasquiero District, Durango, Mexico. Scale, 1 in. “ 4 ft.

Hanging-wall pay -streak ; a, Ore ; 6, Quartz-rock ; c, Felsite ; d, Quartzose felsite ; Felsite veined with quartz.

of quartz, expanding here and there to vugs, run parallel to the walls. In the same vein occur stibnite, calcite in large greenish rhombohedral crystals, and gypsum. Iig- 16 is an attempt to show this somewhat complicated structure.

Fig. 17 shows a section of a vein on the same line of fracture.

The structure of the vein would therefore appear to be amygdaloidal.

298 Structure Oe Ore-Bearing Veins In Mexico.

Hard andesite forms the hanging-wall, while on the foot-wall considerable kaolinization has occurred — the country being altered to a red clay ; between the latter and the band of ore (quartz, with scattered moscas of pyrargyrite), silicification has converted the original andesite into quartz-rock.

Pig. 18 is another instance of a substitution-vein from the district of Santa Cruz de Alaya, Sinaloa. Two bands of ore are separated by limestone, containing numerous thin layers of chert of Cretaceous age. In the upper part of the section these layers are seen crossing a horse’’ of country-rock; in the lower portion the cherty layers are not recognizable, since the limestone has been, to a certain extent, altered and mineralized.

Banded Structure by Keplacement, with Kaolinization, Same District as Fig. 21.

Scale, 1 in. 4 ft.

a, Pay-streak; 6, Kaolinized felsite; c, Mineralized felsite ; d, Clay; e, Clay

parting.

Another vein (Pig. 19) in the same district is composed of three bands of ore, separated by limestone, having, like that of the surrounding formation, parallel siliceous layers, dipping in the opposite direction to that of the vein. The rock is unques- tionably in situ in both cases.

Banded structure may be produced by the building up of the vein from one wall only. Messrs. Aguilera and Ordonez* ap- pear to think that the structure, shown in Fig. 20, of the Mara- villas vein, Pachuca, at a depth of 328 ft. (100 meters), was formed from the foot-wall side. At a short distance from where this section was observed, however, the amethystine quartz on the foot-wall wms absent;! so that, in the former case, it may

El Minend de Faehuca, p. 63, Fig. 5.

t Op. dt, p. 62, Fig. 4.

STEUCTURE OF ORE-BEARIXG TEI-S m MEXICO.

have been formed by local substitution of the country-rock after the deposition of the two bands of ore.

Interesting examples of banded structure, produced by the partial replacement of the country-rock, have been observed by me in the district of Santiago Papasquiero, in Durango. Some- times, as in Fig. 21, considerable silicification has taken place ; or there may be much kaolinization, as in Fig. 22 ; or the same vein may exhibit both of these changes. The normal country-rock in this instance is felsite of the rhyolite group, having a well-marked flow-structure. The felsite occurs in in- terbedded or intrusive dikes, traversing quartz, hornblende- andesite, andesite-breccia, and porphyrite.

.Section of Vein, Showing Metal Caracolj Papasquiero District, Durango, Mexico.

Scale, 1 in. 4 ft-

a, Caracal ore ; 5, Quartz- rock, with stringers of ore ; c, Felsite with flow-structure.

A variety of silver-ore with a conchoidal structure, known .as metal caracolj is common in the lode referred to. It often bears a close resemblance to the fluidal structure of the felsite country. Examined through a microscope, it is seen to be com- posed of a number of thin superimposed layers of quartz, some of which have blackish specks and stains, probably due to the presence of argentite ; and there is little doubt that this ore has replaced felsite. Fig. 23 is one instance of its occurrence. It will be noticed that the rest of the vein — which may be de- .scribed as a mineralized dike — has been altered to quartz-rock. In other parts of the same lode, caraeol ore occurs between bands of ordinary quartz ; so that re-opening, combined with replacement, may have produced the banded structure.

300 Stetjcture Or Ore-Bearing- Veins In Mexico.

A brecciated structure is occasionally seen in tlie ore-bearing* veins of ?kIexico. Fig. 24 was sketched in a working on the lode already referred to, in the district of Santiago Papasquiero. Pounded, as well as angular, white fragments of felsite, ce- mented by quartz spotted with ore, are seen on the foot-wall side of the vein. On the hanging-wall side are several layers

Brecciated Structure, from Same Lode as Fig. 23. Scale, 1 in. — 4 ft. a, Ore ; 6, Quartz-rock ; Brecciated filling (low-grade ore) .

of quartz-rock, no doubt replacing the felsite country. In other portions of the same vein a similar structure is visible, either on or closely near the hanging-wall, inside the vein. Some- times the foot-wall shows angular fragments of felsite or quartz-

Section of Calicanto Vein, Pachuca.

a, Quartz with ferruginous oxides and black sulphides ; c, Rib of pure quartz p (/, Black-sulphide quartz, calcite, and fragments of country-rock; r, Country-rock ; Horse of country-rock.

rock embedded in red clay, forming an agglomerate rather than a true breccia. These observed phenomena may have been the result of local movement along one wall of the vein.

The Calicanto vein of Pachuca has, in one place, the struc- ture sketched in Fig. 25.* The ore-streaks, a a, on the hanging- and foot-wall, consist of colorados and negros mixed ; the center of the vein is occupied by a rib of pure quartz, e ; between

Copied from Fig. 7, p. 67, of “El Mineral de Pachuca.’’

Steucture Op Oee-Bearing- Veins In Mexico. Soi

this and the hanging- wall is a horse {caballo) of eonntry-rock; and lying on the foot-wall band is a rib {cinta) of negros, quartz calcite, and fragments of country-rock. The vein appears to have been re-opened along the center ; and what has the appear- ance of brecciated structure may in reality be an instance of the partial replacement of the country ; for, as a band of ore separates it from the foot-wall, it is difficult to conceive how it could have been produced by movement along that wall with- out leaving evidences of crushing in the band of ore also.

Sometimes the banded structure of veins is marked by cross-

Plan of Structure in Taviches District, Oaxaca, Mexico.

joints, evidently of later origin than the vein-filling, an.d appar- ently indicative of recent horizontal thrusts in the country-rock. Fig. 26 is an interesting instance, observed by me in the Taviches district of Oaxaca. The joints divide the vein up into a number of separate ribs, crosswise to the general strike, thereby more or less obliterating the original bands or ribs of quartz and ore parallel to the walls.’"'* The ore in this case is pyrargyrite, occur- ring in spots (moscas) or little bunches (ojos), which are traceable across the vein in an oblique direction, and which pitch south- ward — ie.j they follow the strike and dip of the cross-joints.

“ Some Silver-Bearing Veins of Mexico/’ Trans. {Brit) Inst M. E., voL xviii., 1900, p. 379.

Stkucture Of Ore-Bearing Veins In Mexico.

Summary.

The contents of metalliferous veins are frequently irregular, or they show no definite structure; but they may exhibit the following characteristics, many of 'which have been referred to ill this paper :

(1) Simple structure, or alike in mineral or minerals from side to side.""’ (James D. Dana.)

(2) Banded structure :

(A) ISTormal or symmetrical;* showing layers of mineral which have been deposited successively from both sides to the center of the vein, each corresponding pair of mineral bands having been deposited simultaneously.

(B) Unsymmetrical: (a) Exhibiting layers which have been deposited successively from one side of the vein to the oppo- site one. (b) With bands produced by the re-opening and re- filling of the vein or country, (c) With bands produced by metasomatic processes, or by the partial or complete alteration, or substitution, of layers of mineral, or country, forming the original filling. The tv-o latter may imitate (A).

(3) Brecciated structure, in which the filling consists of angular fragments of country, or older vein-matter, cemented by, or inerusted with, ore and veinstone.f In rare cases, where the rock or mineral is rounded, it becomes a conglomerate, and sometimes the filling is agglomeratic, consisting of angular or rounded fragments of country or mineral, lying more or less loosely in clay or other soft filling.

(4) AmygdaloidalJ structure. This is rare; but it may occur in eruptive metalliferous dikes.

The term “ crustifieation is clearly unsuitable for banded structure produced either by re-opening or by substitution.

“ The fillings of ore-veins verj often exhibit distinct crustifieation, and some- times even a symmetric succession of crusts from both walls to the central druse.’' — Posepny, “The Genesis of Ore-Deposits,” p. 70 (second edition, p. 77).

f “The fragments of rock, either angular or already more or less rounded, form, when inerusted, the so-called sphere-, cocard e-, or ring-ores. Crusted rock- kernels may often be observed co-existing with distinct wall-crusts. Sometimes the latter are less prominent than the former, and the ore-deposit then has the appearance of a breccia, or a conglomerate, the several fragmetits of which are held together by the mineral crusts.” — “The Genesis of Ore-Deposits,” p. 59 (second edition, p. 64).

X Having the vesicles (which are often almond-shaped ) filled with minerals foreign to the rock, such as quartz, calcite and the zeolites.” — James D. Dana.

“Having cavities filled with alteration-products.” — Granville A. J. Cole.

Mexican Railroads And The Mining Industry. 303

Mexican Railroads and the Mining Industry.

By Luis Salazar, C.E., Mexico City.

(Mexican Meeting, November, 1901 .)

[Secretary’s ITote, — This paper, together with the valuable accompanying map, prepared by direction of Sr. Ingeniero Leandro Fernandez, Minister of the Department of Fomento of the Republic of Mexico, and presented in pamphlet form at one of the sessions of the Mexican meeting, is reprinted in full, although some portions of it may be found to repeat informa- tion contained in other papers.]

Introduction.

Internal improvements are the great seals ; stamping upon the history of nations their epochs of peace, in which notable enterprises are conceived, and fresh impulses given along the path of progress.

Such forerunners of national benefits have never been so notable in Mexico as in the last four decades of the nineteenth century, during which the national faith in the consolidation of peace has been a guaranty of the development of all the ele- ments of national prosperity.

Among all the improvements which have been realized with the unanimous approbation of the people, the railroads occupy a preferred place, for upon them depends the expansion of com- merce, of agriculture and of mining, the three great factors of the wealth of Mexico.

In a country so extensive as the Mexican Republic, where the inhabitants are greatly scattered, and great distances separate the producer from the consumer, the only way to encourage home industry, and the development of commerce, agriculture and mining, is to construct railroads, which shorten distance, facilitate transportation and minimize its costs.

The mountainous character of the country makes the navi- gation of its rivers practically impossible, except very near to

Vol. Xxxii. — 18

304 MEXICAIr RAILROADS AND THE MININH INDUSTRY.

the coasts ; and experience has shown that well-made carriage- roads cost as much as a railroad, and are much more costly to maintain.

As a nation whose civilization is relatively recent, and w'hose traditional disturbances are well known, we encounter serious difficulties in obtaining the capital which is indispensable for the construction of railroads, especially in the first period of construction of the system ; and this is the more felt when the work, once commenced, is very slow in its advance.

Each country, according to its economic conditions and to public opinion, has adopted the most appropriate manner of promoting the construction of railroads — in some eases, the direct and exclusive action of the Grovernment; in others, pri- vate enterprise, the official concession of subventions, and fran- chises to syndicates or companies.

The first form of encouragement presupposes a perfect sys- tem of income and a flourishing state of the treasury, a perfect and efficient organization of the public administration, capable of rendering the service of its employees upon construction, maintenance and operation of a railroad, as effective as in the case of a private company. In Mexico, only the National railroad of Tehuantepec, and the branch from Tehuacan to Esperanza, have been constructed in this manner; and the latter was never operated by the Government, and is now private property.

The second form of assistance is impossible in Mexico, on account of the relative scarcity of capital and the total lack of the spirit of enterprise.

The policy which has been adopted, therefore, has consisted in subsidizing railroad enterprises with grants of money or bonds, and with liberal franchises.

Public prosperity and tranquillity depend, at least in part, upon the establishment of railroads. It is therefore natural that the Mexican Government, when it initiated, in 1877, an era of progress for the Republic, should have wished to enter at once into the enjoyment of these benefits by the extension of ample concessions, and giving satisfactory protection to the first contracts that were made. Hence useless formalities were suppressed, and whatever would facilitate the execution of the works was temporarily permitted, while all classes of diJfficul-

Mexican Railroads And The Mining Industry.

ties, especially as to the expropriation of property, were sum- marily removed. The Government was persuaded of the importance of securing to the companies first organized a substantial success, as an encouragement to future enterprises.

The number and liberality of the concessions given antago- nized public opinion for a short time ; since it was believed that the federal revenue would not be sufficient to satisfy the obliga- tions that had been contracted with the construction-companies. But it was necessary to make a supreme eftort, even to make sacrifices, rather than to lose the opportunity of gaining, by the investment of foreign capital in Mexico, the impulse which would bring prosperity. Peace had given new birth to public confidence, and awakened in foreign countries the desire to employ their capital for the development of the almost virgin soil of Mexico. It was clearly the duty of the Government to favor the enterprises that came to aid the working forces of the country.

N’ot all the companies were able to fulfill their obligations, and the Government was not obliged to confront any heavy liability at any one moment. The small success of some enter- prises was due to their speculative and irresponsible character.

In spite of this, the results as obtained are highly satisfac- tory. Mexico may be proud of having constructed, in a short space of time, thousands of kilometers of railroads, which have already led to many other internal improvements. The Repub- lic is as yet far from having a network of railroads which fulfills all its necessities and aspirations; but not many years will pass before the great interoceanic and intercontinental lines will be actually complete.

These railroads will powerfully serve to diminish the losses which the mining industry has suffered from the depreciation of silver, and to encourage the increase of production. It is well known that silver occupies the first place in the list of exports from this country, which must be the measure, in the long run, of its importations. The amounts represented by the depreciation of silver must be compensated by the decreased cost of production of that metal, which, in spite of everything, must continue to be the preponderating element of exchange in exterior commerce. The geological structure of Mexico makes silver one of its leading natural products. Moreover, as an

306 MEXICAN KAILROADS AND THE MIxNING INDUSTRY.

article of mercbanclise, it is one of the most appropriate for exportation, not being subject to damage in transport, and rep- resenting large value in little bulk, and thus specially suited to the conditions of commerce. Hence, all measures which tend, by favoring the increase of the production of silver, to counter- act the deficiency caused by its loss in value, have been the ob- ject of distinguished attention on the part of the Government.

The following synopsis shows how the principal railroads have been established in Mexico, and also mentions a few sec- ondary railroads, principally of interest to miners.

I. The Interoceanic Eailroad of Tehuantepec.

It has always been considered of very great importance to have a communication between the Atlantic and the Pacific Oceans.

The route by way of Cape Horn, to afibrd communication between western Europe and the Pacific coast of America and to Asia, involves a long and perilous voyage. The United States of America, from their enormous commercial traffic, have been obliged to construct, before all else, the railroads that bring Hew York and the other principal Eastern ports into direct communication with San Erancisco, California, and with other ports of the Pacific coast.

American capital also opened the route by way of Panama to railroad traffic, shortening notably the communication be- tween the two extreme coasts.

Communication 'between the two oceans by way of Tehuan- tepec has always had its champions, commencing with Hernan Cortes, the conqueror of Mexico, who traversed and personally examined the Isthmus, and found it to be of such importance, from a geographical point of view, that he asked Charles V. to concede to him, in that region, extensive properties, comprising the Tarifa, La Venta and Ohicapa plantations.

The advantages of the Tehuantepec interoceanic route over that of Panama are very great, from the geographical point of view as well as from that of commerce. The annexed map will show, in a general way, the geographical advantages of Tehuantepec for the commerce between the coasts of the United States, and even with respect to western Europe.

The route which presents the greatest advantages should be

Mexican Eailroabs And The Minings Inpustry. 307

that which is the nearest to what may be coJisidered the route of the commerce of the worlds wMch may be marked on the globe as between Hong-Kong and Yokohama on the Asiatic coast, across the Pacific Ocean, passing through San Prancisco, across the United States to Yew York, thence across the Atlantic to Liverpool or Havre.

Of all the interoceanic lines, that of Tehuantepec approaches most nearly to the above route of traffic. In a right line, the distance between Tehuantepec and Panama is 1200 miles. When we examine a terrestrial globe, we see that the shortest route for a sailing-ship or for a steamer between the Oriental coast of Asia and any point on the Pacific coast of the American isthmuses passes very near to the coast of Tehuante- pec ; practically the shortest great circle from Panama to Hong- Kong passes near Tehuantepec and to the east of San Fran- oisco. Even the shortest route from Panama to the Sandwich Islands will pass very near to the Isthmus of Tehuantepec. It will be at once seen that nearly the double of the distance mentioned will be needed if we cross at the Isthmus of Panama, especially for the traffic of the Pacific Ocean with the Gulf ports. On a smaller scale, the distance by way of Panama to all of the ports of the United States and of western Europe, on the Atlantic, will be considerably diminished by way of Tehuantepec.

The following table, formed from data compiled by the Hydrographic Office of Yavigation, U. S. Yavy Department, shows the distance between the commercial ports of the world, by way of the three American isthmuses, calculated in English miles :

Terminal Points.

Via Te- huantepec.

Via Nica- ragua Canal.

Via

Panama.

JSTew York to San Francisco,

. 4,925

5,651

6,107

New York to Puget Sound, .

. 5,647

6,524

6,855

New York to Sitka, .

. 6,347

7,113

7,555

New York to Behring’s Straits,

. 7,788

8,524

9,101

New York to Acapulco,

. 2,722

3,507

3,988

New York to Mazatldn,

. 3,476

4,232

4,675

New York to Hong- Kong, .

. 11,597

12,313

12,645

New York to Yokohama, .

. 9,984

10,626

11,211

New York to Melbourne, .

. 11,068

11,357

11,471

New York to Auckland,

. 9,345

9,747

9,813

New York to Honolulu,

. 6,566

7,390

7,075

New York to Callao, .

. 4,661

4,312

3,873

New York to Guayaquil, .

. 4,141

3,774

3,303

308 Mexican Eaileoabs And The Mining Industry.

Via Te-

Via Nica-

Via

Terminal Points.

huantepec.

ragua Canal.

Panama

New York to Valparaiso, .

. 6,370

5,774

5,337

New Orleans to San Francisco,

. 3,561

4,776

5,415

New Orleans to Acapulco, .

. 1,454

2,631

3,296

New Orleans to Mazatlan, .

. 2,067

3,357

3,983

New Orleans to Callao,

. 3,393

3,436

3,181

New Orleans to Valparaiso,

. 5,040

4,899

4,644

Liverpool to San Francisco,

. 8,274

8,783

9,071

Liverpool to Acapulco,

. 6,076

6,639

6,952

Liverpool to Mazatlan,

. 6,714

7,364

7,640

Liverpool to Auckland,

. 12,584

12,877

12,777

Liverpool to Guayaquil,

. 7,379

6,848

6,267

Liverpool to Callao, .

. 7,899

7,444

6,837

Liverpool to Valparaiso,

. 9,356

8,906

8,301

Liverpool to Honolulu,

9,805

10,522

10,670

Liverpool to Yokohama,

. 13,223

13,758

14,175

Liverpool to Melbourne,

. 14,113

14,499

14,435

A comparison among sixteen of the principal routes of com- merce between the Orient and Occident shows an aggregate saving of more than 125,000 miles by way of Tehuantepec.

The nautical conditions for sailing-ships are much more favorable at Tehuantepec than at Panama. Navigators alwmys avoid, as much as possible, the region of calms on both sides of the Isthmus of Panama. According to the data of Lieu- tenant Maury and Captain Bent, well-known nautical experts, these calms extend to a great distance in the Pacific Ocean at the latitude of Panama.

It thus appears that an interoceanic route by Tehuantepec would connect the eastern and western coasts of the United States at the best possible place, and would develop a coasting traffic of great magnitude and of vast importance to the two countries.

The climatic conditions are very favorable in Tehuantepec. The prevailing winds from the northeast of the United States, which cross the G-ulf of Mexico, make the climate of Tehuan- tepec very healthy.

These considerations have caused the Mexican Government to pay special attention to the establishment of the Tehuante- pec railroad, seeking the solution of the problem even by great sacrifices.

The first contract for the concession of this interoceanic line was made in 1842, with Mr. Jose de Garay, who, being un-

Mexican Railroads And The Minin& Industry. 309

able to undertake the work on Ms own account, turned over the concession to the United States Government, without authorization to do so from the Mexican Government : for which reason the concession was declared null and void.

Other contracts followed, all without result, either through the lack of funds by the contractors or because the construc- tion of the Panama railroad impaired the financial prospects of the scheme.

It was not until 1879 that the first efiective contract was made with Mr. Ed. Learned ; but the company which he organ- ized could only construct 35 kilometers of the road; and the contract was canceled when the several stipulated terms had expired, after having been extended several times. The section of railroad already constructed, as well as the rest of the prop- erty of the company, became the property of the Government for a cash payment of $125,000 silver, and a further sum of $1,500,000 U. S. gold, paid in several instalments.

The Federal Executive having been authorized by the Con- gress to construct the Interoceanic railroad of Tehuantepec for account of the nation, whether by direct administration or by contract, a commission of engineers was appointed to make the reconnaissance and location of the line, and $600,000 was sent to England and. to the United States for the purchase of instruments, machinery, tools, implements, and rolling-stock.

After this, bids were asked for the contracting of the work ; and from among the various propositions presented, that of Sr. D. Sdnchez was accepted. This gentleman contracted in 1882 to do the work for the sum of $25,000 per kilometer of con- structed railroad, taking over for his own account and risk all the sums spent up to that time by the Government, amount- ing to $701,000. Under this contract only 108 kilometers were constructed, in two divisions; but the railroad was not fin- ished; and in 1888 the contract was rescinded, the Government having to make an outlay of $1,434,000 in payment for the materials that had been collected, for the work done, and for indemnification to the contractor.

For the completion of the railroad, the ordinary resources of the federal treasury were not suflficient ; and it was neces- sary to obtain money in some foreign market by means of a loan. This loan was issued in London, Berlin and Amsterdam,

310 Mexican Raileoads And The Mining Industry.

for £2,700,000, at 5 jjer cent, interest, with a mortgage on the railroad itself, placing the bonds at 70 per cent, of their par value.

The total product of this loan was destined for the completion of the line according to a contract made for that purpose, in London, with the house of MacMurdo, in 1888, according to which the work was to be terminated within two years and a half. But the death of Mr. MacMurdo made the rescission of this contract a necessity ; and a new contract for the construc- tion was entered into, in 1891, with Messrs. Charles Stanhope, J. H. Hampson and E. L. Oorthell, for the conclusion of the work, applying for this purpose $2,000,000 remaining from the loan just mentioned, and under which 250 kilometers of railroad were constructed. The above amount was not suffi- cient; and some $3,000,000, from another loan made in Mexico, was assigned to the completion of the railroad.

Under a new contract made with Mr. Charles Stanhope, the line, with a total length of 309 kilom., was finished October 15, 1894. But the operation of the railroad made necessary the acquirement of an equipment which the Grovernment was not in a condition to buy for cash. This was the motive for ac- cepting propositions made to the Government in 1896, looking towards providing the line with rolling-stock and other things necessary for its service, and for the maintenance and operation of the line. The payment was to be made in successive por- tions, with a moderate interest on the unpaid sums.

The operation of the railroad and the maintenance of way was superintended, up to December 15, 1899, by officials ap- pointed by the Government.

The mortgage of the Tehuantepec railroad and its depend- encies, constituted to cover the loan of £2,700,000 just men- tioned, was lifted when the conversion was made of the for- eign debt at 6 per cent., in which were included alTthe mort- gage bonds that had been issued.

On and after December 15, 1899, a company formed by Messrs. S. Pearson & Son, Ltd., of London, took charge of the reconstruction, maintenance and operation of the line, under the character of agent and representative of the Government. In a separate contract is included the contract for the engi- neering work in the terminal ports of Salina Cruz on the Pa-

Mexican Kailroabs And The Mining Industry. 311

cific side and Coatzaeoalcos on the Gulf of Mexico, the prin- cipal parts of which will be finished in the four first years, and the whole within seven years.

The Federal Government and the company named have entered into a partnership-contract for the operation of the railroad and of the ports mentioned for the term of fifty years.

The efibrts of the Mexican Government have been constant and unremitting, and its sacrifices very great; but it has at last realized the construction of a railroad of incalculable im- portance to the world’s commerce.

IL The Mexican Railroad, from Mexico City to Vera Cruz.

As far back as 1887, the first decree was published for the construction of the railroad which was to unite the Capital with the principal Mexican seaport on the Gulf coast. Practi- cally nothing was done by the successive companies owming the concessions relating to this road, until, in 1863, under the contract made with Mr. Antonio Escandon, 75 Mlom. were con- structed, from Vera Cruz to Paso del Macho.

The contract was transferred in 1864 to the English company which still retains the management of the business. In 1868 a section of 139 kilom., from the Capital of Mexico to Api- zaco, was in operation ; and the Puebla branch, covering 47 kilometers more, was inaugurated on December 16, 1869. The years of 1871 and 1872 were those of the greatest activity in the construction of the Mexican railroad; and finally, on Janu- ary 1, 1873, the whole road was inaugurated. It may be well considered a great work, on account of its engineering con- structions and of its daring location.

The total length of the system is 423.759 kilom. The prin- cipal engineering works are : The Soledad bridge, 228 meters long; the Paso del Macho bridge, 50 meters long; the San Alejo bridge, 97 meters long; the Chiquihuite bridge, 126 meters long; the Atoyac bridge, 100 meters long; the curved bridge of Rioseco, 75 meters long; and the famous Metlac bridge, also on a curve, 138 meters long and 28 meters high. The viaducts of the Infiernillo, of Wimer, and the Joya, are respectively 93, 85 and 91 meters in length.

At Vera Cruz this railroad has a steel wharf 200 meters long, with five hydraulic cranes of great power, which facilitate the

312 Mbxicais Bailkoads And The Minin& Industry.

unloading of heavy merchandise and machinery. This wharf cost $150,000. The railroad has also in its service three steam towboats and thirteen lighters, with a capacity of 19 tons each,, for the wharf-service.

This road may be considered as divided into three great sec- tions.

The section of the central plateau between Mexico City and Eoca del Monte has a length of 251.250 kilom. In this part the curves are of ample radius, and the maximum grade is 1.5* per cent. The greatest altitude of the line is in this section, where it has an elevation- above sea level of 2532 meters. This section has 53 iron bridges, 34 culverts with stone arches, and 262 open culverts. The stations are 16 in number, ot which 3 are of importance, namely, Mexico, Apizaco and Es- peranza.

The second section, from Boca del Monte to Paso del Macho, measures 96.500 kilometers, over exceedingly broken ground,, and comprises the summits of Maltrata, the Metlac gulch and the Chiquihuite gulch.

The curves are abrupt, and the grades are as high as 4 per cent, in several places, whose united length is 22 kilometers, while grades of from 2 to 3|- per cent, exist along 40 kilometers.

There are in this section 28 bridges and viaducts, whose united length is 1297 meters, and 15 tunnels, with 897 meters- total length ; the culverts are 201, both arched and open. There are 7 stations, among them the very important station of Ori- zaba, which has the most complete workshops that could pos- sibly be necessary for a railroad.

The third section, from Paso del Macho to Vera Cruz,, measures 46 kilometers, with 6 stations, including the ter- minal stations at the port. In this section there are 10 impor- tant bridges, among them the largest bridge on the line, which is that of Soledad, over the river Jamapa. This is a doubly useful bridge, since the wagon-road also passes between its. trusses.

The Mexican railroad, besides rendering efficient service in the easy introduction of foreign goods, was the first to benefit the mining industry by opposing the salt monopoly. The- mining companies in Pachuca and Eeal del Monte were obliged to pay as much as $1.60 per arroba of 25 pounds for salt from

Mexican Kailroabs And The Mining Industry. 31S'

the interior. The Yera Cruz railroad, hj its competition, re- duced this price to 38 cents per arroha.

The branch line, 45.750 kilom. long, which was afterwards- built from Ometusco station to Pachuca, has opened a direct communication between that mining town and the City of Mexico and the port of Yera Cruz.

The Mexican railroad connects at Mexico City with all the roads which converge to that point; at Irolo, with the Inter- oceanic railroad to Yera Cruz and with the Hidalgo railroad; in Apizaco, with the branch to Puebla ; at San Marcos, with the Interoceanic again, and with the Hautla railroad; at Espe- ranza, with the branch to Tehuaean and the line to Xuchil ; at Cordoba, with the line to Motzorongo; and at Yera Cruz,, with the lines to Alvarado, Xalpa and the Boca del Eio.

IIL The Mexican Central Railroad.

This trunk-line, starting at Mexico City, passes through the central part of the Republic, and connects the capital with the cities of Tula (branch-line from here to Pachuca), Queretaro,. Celaya, Irapuato (branch-line to Guadalajara), Silao (branch to Guanajuato), Leon, Lagos, Aguascalientes (branch to San Luis- Potosi and Tampico), Zacatecas, Torreon (junction with the International and Durango railroad), Jimenez (branch to Parral),. Chihuahua (branch to San Andres), and the City of Juarez, the terminal point of the line, on the right bank of the Rio Bravo (Rio Grande). The total length of this line is 1970.300 kilom.

The law of September 8, 1880, authorized the construction of lines from Mexico to Leon; from Leon to Paso del Horte; and from some point on said lines (which turned out to be Irapuato) a line to the Pacific, passing through Guadalajara.

In 1880 and 1881 the Mexican Central Railroad Company,. Ltd., purchased the concessions from Aguascalientes to San Luis Potosi, and from the latter city to Tantoyuquita and to Tampico.

In 1883 all the concessions owned by the Mexican Central Company were consolidated, which was under the law of Sep- tember 8, 1880, into a single concession. The law had fixed the dates for commencing the reconnaissance of the lines, and stipulated that the section from Mexico City to Irapuato should be finished at the end of 1881, and as far as Leon in 1882.

314 Mexican Railroads And The Mining Industry.

For completing the lines from Mexico to the Pacific and to Paso del lorte, five years’ and eight years’ time, respectively, was allowed, to he counted from the date on which the line from Mexico to Leon might be put into service for the public.

The Government conceded a subvention of $9500, Mexican, for each kilometer of line of 1.44 meter gauge, to be paid in scrip, to be called Certificates of Eailroad Construction,” for the redemption of which, without interest, 6 per cent, of the income from the custom-houses was pledged. Moreover, the right of acquiring land by legal proceedings, in condemnation, and also liberal privileges as to free importations and as to exemption from taxes, were granted to the Company, which was also authorized to issue shares, bonds and scrip, and to mortgage its property.

Construction was commenced on May 25, 1880, and carried on with great activity. In September, 1881, the section from Mexico to Tula, 80 kilom., was inaugurated; in December of the same year the line to San Juan del Rio, 190 kilom., was opened to traffic ; and in February of the following year the line reached Queretaro, 245 kilom. At the end of 1882 it had been opened to traffic successively to Oelaya, Irapuato, Leon, the Guanajuato branch, and to Lagos, 475 kilom. from the City of Mexico.

On the hTorthern division the road was inaugurated to Chi- huahua city, 360 kilom. from the City of Juarez, September 16,

At the end of 1883 the division of Mexico had been finished as far as Zacatecas, 706 kilom., and, besides this, the short branch of 18 kilom. long, between Silao and Marfil. It wms operated, however, only as far as Encarnacion, as the important bridge at that point, over the river of the same name, had not yet been completed.

On the hTorthern division the railroad had, in 1883, a length of 996 kilom., and there were in operation, as far as Lerdo, 829 kilometers.

On March 8, 1884, the last rail of the main line was laid at a point near Fresnillo, belonging to kilometer 765, counted from the City of Mexico; and on the following 10th of April the road was opened to the public from Mexico City to the Oity of Juarez, with a total length of 1970.300 kilom.

Mexican Eailroads And The Mining Industry. 315

The vast regions traversed by the Mexican Central railroad are important more especially for agriculture; but they also include several mining centers.

The metal and minerals from the Actopan and Cardonal dis- tricts come to Tula over the Pachuca branch, 79 kilom. long, which notably favors shipments from Pachuca, Real del Monte and El Chico.

San Juan del Rio is the shipping-point for the mining com- panies at Doctor, Aguas, Maeoni, Toliman, San Cristobal Amoles and Rio Blanco ; for the marble from Vizcarron ; and for the opals which abound in Amealco and in Esperanza.

At Celaya the Central railroad connects with the system ot the Mexican National railroad, and with the line of Roque and Plancarte (14.600 kilom.).

Kaolin and white clay occur near the station at Salamanca, which is the beginning of the branch to Jaral (35.500 kilom.).

From Irapuato branches off the line to Guadalajara and Ameca (384.500 kilom.) ; and from the station of Yurecuaro, on this line, begins the branch for Zamora and Cahvinda (61.400 kilom.).

Near Guanajuato the railroad enters a metalliferous region of great fame and present industrial activity. The capital of this State is connected at Silao with the main line by a branch (18.300 kilom.), which reaches to Marfil.

Lagos is the station which receives the minerals from Comanja, Campechana and La Sauceda.

Mining is of very notable importance in the zones which fol- low along the line. Leaving Lagos, it touches the mercury- bearing region of El Puerto, passing afterward near to the mining towns of Asientos, by a branch from Rincon Romos to the mines of Tepezal4 and others in Aguascalientes. From the station at Aguascalientes there is a short line of 3200 meters, to the great smelter of Aguascalientes.

At the Ohicalote station is the junction with the line to San Luis Potosi and Tampico, whose total length, taken as begin- ning at Aguascalientes, is 677.800 kilom.

Zacatecas is a station on the main line, where there is a min- eral center of great riches, joined to the mining camp of Ojo Caliente by a short branch of 47.500 kilometers, which brings salt from Penon Blanco. The mining districts of Fres-

316 Mbxicak Eaileoads Akb The Mixinh Inbustey.

nillo, Sombrerete, San Juan de Guadalupe and Mazapil also are benefited by the operation of the railroad.

Torreoii station is the junction with the system of the Mexi- can International railroad, at which point comes in the branch from Lerdo to San Pedro de la Colonia (63.199 kilom. long), which belongs to the Mexican Central Company.

The extremely rich mining camp of Sierra Mojada is joined to the main line by a branch 125 kilom. long, which connects at Escalom

At the Jimenez station comes in the essentially mining rail- road of Parral, 89.300 kilom. long.

At Chihuahua the Central railroad reaches again a most im- portant mining center, and from that point start the line to the Pacific (now operating 200 kilom., to Minaca) and the branch mineral railroad to Santa Eulalia.

Finally, at the City of Juarez, which is the terminal point of the Mexican Central railroad, it connects with the Mexican, Eio Grande and Pacific railroad, which touches the mining town of Corralitos.

After the crossing of the Rio Bravo (Rio Grande) it also connects, at El Paso, Tex., with the American railway-systems of the Texas Pacific, the Southern Pacific, and the Atchison, Topeka and Santa Fe.

W. The Mexican Hationab Raileoab.

This line competes with the Mexican Central railroad for the traffic between Mexico and the United States. Its location is more advantageous than that of the Centra], in that it shortens greatly the distance between the City of Mexico and the Eastern and Southern States of the United States. On the other hand, its construction, especially between the City of Mexico and Toluca, over a very broken country, demanded heavy grades, which make operation costly. The narrow gauge (914 mm., or 36 in.) has also been a great inconvenience, necessitating, for international transportation, a costly transfer at Laredo, Texas, on the frontier of the United States, beyond which the railroads have the standard gauge of 1.44 meters (4 ft. 8.5 in.), which is that of the Mexican Central.

Segrbtaey’s Note. — The narrow gauge of the Mexican National railroad is the same as that of the original Denver and Kio Grande system, to the con-

Mexican Eailroads And The Mining Industry. 317

The agricultural regions which are traversed h j the Mexican rational railroad are fertile, since it follows from the valley of Toluca the depression of the important river Lerma, passing afterwards through the valleys of Ixtlahuaca, Acambaro and Salvatierra. The course of the river Laja guides the line through the Bajio, by way of the valleys of Bocas and Jaral, in the States of Guanajuato and San Luis Potosi ; and it crosses afterwards the frontier States of ISTuevo Leon and Coahuila, to its terminus in Laredo, on the right side of the Eio Bravo (Rio Grande).

The concession under which this railway was built was given in 1877 to Messrs. Palmer and Sullivan, representatives of the Mexican ITational Construction Company, with a stipulation, as in the case of the Mexican Central railroad, for the con-

struction of which the mining industry of Colorado is so greatly indebted. The practicability of constructing a 36-in. road-bed, where a greater width would be enormously more costly, and of operating such a line with curves and grades not permissible to a wider one, and with light rails and rolling-stock, led to a con- siderable construction of narrow-gauge railways in the United States 26 or 30 years ago, and encouraged the idea of an extensive system of that kind. Besides the Colorado roads, such lines as that from Toledo to Kansas City, and the Mexi- can National (the latter of which was projected by the parties who had been so successful in Colorado), may be mentioned as examples. The outcome was a curious and instructive object-lesson. The great chain of connecting narrow- gauge railroads never came to pass, for the simple reason that so many lines, ex- pected to be links in it, developed so much business as to warrant the broadening of their gauges, even at great cost for rock-excavations, the straightening of curves, the enlargement of tunnels, and the purchase of heavier rails and roll- ing-stock. That the broader gauge universally resulting was that of 4 ft. 8.5 in. is another curious instance of the way in which commercial considerations may overrule technical considerations. This gauge, said to have been originally adopted hy reason of the accidental circumstance that it happened to be that of the mine-wagons first hauled by Stephenson’s locomotives, is certainly not the best. For certain conditions, a narrower one is superior ; and for heavy traffic, a wider one would be, perhaps, safer, and unquestionably be more economical — especially in the consumption of fuel, in the burning of which our locomotives are hopelessly wasteful, because of their necessarily narrow fire-boxes. Great engineers, like Brunei, have proved this point, hut in vain. In the United States we have seen long trunk-lines, like the Erie, forced to abandon their broad gauge, not because of its demonstrated defects, but because they could not afford to use what connecting roads did not use. The ability to send cars all over the country, exchanging with other roads, and avoiding delays and transfers of goods, has proved more important than any possible superiority of a special gauge. And so, like the decimal system, and other long-established human in- stitutions, the “standard” gauge has not so much survived because it was theo- retically the fittest, as shown itself to be the fittest by surviving ! — B. R.

318 Mexican Eaieroads And The Mining Indtjstkt.

struction of railroad diroctcd towards tho Pacitic Ocoan, in connection, with that to Laredo.

The line was subdivided into sections : from Mexico to To- luca Acambaro and Morelia; from Aeambaro to San Luis Potosi; and from Laredo to the interior. On all these sec- tions, work was commenced at the same time, in October, 1880, and was prosecuted continuously until June, 1885, at which time there had been finished: from Laredo to Saltillo, 377 kilom. ; Mexico to San Miguel de Allende, 408 Idiom. ; and the branch from Acambaro towards Patzcuaro, to a length of 154 kilom. In the line to the Pacific, rails were only laid from Manzanillo to Armeria, 45 kilom.

"While matters were in this state, financial difiiculties caused the transfer of the international part of the line to another company, called the Mexican hfational it. E. Co. The construc- tion company retained only the division from Manzanillo to Armeria. Under the new company the work was resumed in November, 1887, and on September 28, 1888, was laid down the last rail of the 565 kilom. necessary to unite the Northern and Southern divisions, between Saltillo and San Miguel de Allende. The total length of the line between Mexico and Laredo is 1348.400 kilom.

Prom the Aeambaro station starts the important branch which passes through Morelia, Patzcuaro and Uruajpan (total length 230.400 kilom.).

The same company possesses and operates the line from Taeuba to El Salto, 68 kilom., and the line from Matamoros to San Miguel de las Cuevas, 21.58 kilom.

The connections of the Mexican National railroad, not in- cluding those in the City of Mexico, are as follows : In Toluca, with the railroads to San Juan de las Huertas, 15.700 kilom., and to Tenango, 27.700 kilom. ; at Ixtlahuaca, with a line to Mani, 34.400 kilom. ; at Tultenango, with a line to Sandcse, 47 kilom. ; at Maravatio, with the Michoacan and Pacific rail- road, which goes to Zitacuaro, 90 kilom., and with a branch to Angangueo and to Trojes, 6 kilom. ; at Celaya, with the Mexican Central railroad ; at Dolores Hidalgo, with the Lourdes railroad ; at San Luis Potosi, with the Aguascalientes railroad and with the line to Tampico ; at Vanegas, with the railroad to Matehuala and Potrero, 65 kilom. ; at Saltillo, with the railroad

Mexican Raileoabs And The Mixing Industry. 319

to Concepcion, 125.460 kilom. ; at Monterrey, with the Gulf railroad and with the International railroad; and at Laredo with the Great Iorthern, of the American system, after cross- ing the most important bridge of the line, which is that over the E.io Bravo (Rio Grande), formed of seven spans of 46 meters each, of Pratt trusses, without counting the approaches, which are more than 200 meters long.

If the agricultural regions traversed by the Mexican national railroad have received great benefit from its opening, the industries in general, and mining, have also received a notable impulse from this artery of communication. The mining towns of El Oro, Tlalpuhajua and Osumatlan have the Tultenango station for the shipping of their ores, Angan- gueo and Trojes are united to Maravatio by a railroad which starts out from Pozos and Xiehu; San Eelipe, Maravatio, San Jose de la Chica, Guadalcazar, Charcas, Catorce, Bonanza, Al- barradon, Mazapil, Cerro Gordo, Villaldama, Iguana and Can- dela freight the products of their mines to stations of the Mex- ican national railroad, whether they are to be treated at the smelters in San Luis Potosi or Monterrey, or exported to the United States.

V. The Mexican International Railroad.

The first contract of the concession for this railroad was ap- proved by the Mexican Congress in Hovember, 1881, and given to the concern which at first was called the International Construction Company, and which promised to construct a railroad without any subvention, although wfith certain fran- chises, from the City of Mexico to the Rio Bravo, at a point which was afterwards chosen to be Piedras Xegras, now called Porfirio Diaz City.

The beginning of the line is in the channel of the Rio Bravo (Rio Grande), which forms the boundary between Mexico and the United States, 1500 meters east of the City of Porfirio Diaz.

The road takes a south-west direction, passing by Monclova, and reaching the Reata station, from which starts the im- portant branch which terminates in Monterrey, the capital of the State of ISTuevo Leon. From Reata the main line contin- ues in a general westerly direction as far as Torreon, where it makes a junction with the Mexican Central railroad.

Vol. Xxxii. — 19

320 Mexican Railkoabs And The Mining Industry.

The road continues to the south-west as far as Durango, a distance of 869.510 kilom., measured from the City of Porfirio Diaz.

Besides the Monterrey branch, which measures 115.540 kilom., there is a branch from Sabinas to Hondo, 19.310 kilom. long ; one from Monclova to Cuatro Cienegas, in the direction towards Sierra Mojada, 68.510 kilom. long; one from Mata- moros to Tlahualilo, 70 kilom. long, with a short secondary branch towards Mapimi, 22.530 kilom. long; one from Hornos to San Pedro de la Oolonia, 23.900 kilom. long; and the branch from Durango to Papasquiaro, 165.560 kilom. long.

The region traversed by this railroad is largely productive of cereals, which yield a large income of freights; but with- out a doubt the cotton-bearing zone, fertilized by the river Hazas, the carboniferous zones of Monclova, San Felipe and Hondo, and the mining districts of Muzquiz, Cuatro Cienegas, Monclova, Mapimi, Ouencamfe, Durango and Papasquiaro make the Mexican International railroad exceptionally important to the mining industry, especially in Durango. The salt from Viesca also has obtained an easy outlet by this road, cheapen- ing this article, so necessary for the treatment of certain ores.

The Mexican International railroad is the most direct line of standard gauge (1,44 meters) between the capital of this Kepub- lie and the States of the American Union; for which reason it enjoys a certain preference on the part of the commerce of exports and imports.

With respect to engineering-works, the only one necessary to mention is the metallic bridge over the river Sabinas, which rests upon two piers and three abutments of mason-work. Of the spans which it has, two are 76.20 meters and one is 38.50 meters long.

The international bridge over the Rio Bravo, connecting Porfirio Diaz City with Eagle Pass, is 549 meters long, with five truss-spans of the Howe system.

This railroad began to be operated as far as the Sabinas station, 117 kilom., in December, 1883, and was opened to the public use, division by division, until it united with the Central railroad in Torreon, February 4, 1888, and was inaugurated as far as Durango, October 15, 1892.

The connections of this line are as follows : At Eagle Pass,

Mexican Railroads And The Mininc Industry, 321

with the system of the Southern Pacific ; at Reata, with Mon- terrey, with the system of the Mexican iTational railroad, and with the railroad from Monterrey to the Grulf of Mexico ; at Hornos, with San Pedro de la Colonia; at Matamoros, with Tlahiialilo; at Torreon, with the Mexican system; at Pedri- cena, with Velardena; and at Durango, with Santiago Papas- quiaro.

YL The Intbroceanic Railroad, erom Acapulco to Yera Oruz.

-The attraction which this line presents for interoceanic com- munication through the capital of the Republic caused the Government to extend to it a special protection. The first con- cession, granted in 1855, as well as several concessions given to other parties afterwards, had no result whatever.

Beginning in 1878, several concessions were granted for. the construction of railroads of local interest in the States of Morelos, Puebla and Yera Cruz, which were incorporated in the concession from Mexico to Acapulco and made one con- solidated concession for the railroad to Acapulco, Morelos, Mexico, ]j*olo and Yera Cruz.

The subventions granted by the Government were applied as follows: In cash, $8000 per kilom. for 359 kilom. ; $6500 per kilom. for 81 kilom. ; $6000 per kilom. for 40 kilom. In certificates of railroad construction, $8000 per kilom. of all the rest of the total length of the line, which certificates were to be redeemed by 3 per cent, of the duties on imports.

Starting from Mexico, the main line towards Acapulco reaches Ameca, 58 kilom. ; Cuautla, 138 kilom. ; from here to Jojutla, 196 kilom.; Perote, 338 kilom.; Jalapa, 415 kilom.; and, finally, reaches Yera Cruz with a total length of 547 kilom.

There are two short branches — one of 17.300 kilom., be- tween San Lorenzo and San Nicolas, and the other of 10.900 kilom., from Yirreyes to Yilla Libres.

The railroad is of narrow gauge (914 mm.), with a maxi- mum grade of 2.5 per cent.

There are only two important bridges, which have 50 meters and 70 meters of span, and a tunnel 400 meters long. There is also a wharf at the port of Yera Cruz.

322 Mexican Railuoads And The Mininc Industry.

Upon tlie Southern division there is the bridge of Ozumba, 118.50 meters long, built upon 11 masonry-piers, and 5 more piers built up with rails, properly braced. The trusses are also built up of rails.

The bridge of jSTepantla is 31.50 meters long, with unequal spans ; some of the trusses are of iron plates, and others of rails. The bridge over the Tinaco gulch is 24.20 meters long, with a span of 14.20 meters in the center, crossed by Warren trusses and beams built up of rails.

The country between Temamatla and Ozumba and Yecapixtla is considerably broken; and the line follows a curved loca- tion in order to make the ascent with a maximum grade of 2.5 per cent., and curves which have as little as 100 meters radius.

According to its concession, the Morelos railroad began to be constructed October 17, 1878. The first 25 kilom., as far as Ayotla, were opened to the public August 21, 1878, and the line to Guautla, 137 kilom., was opened to traffic December 8, 1881, and in the following year the work was continued as far as Yautepec.

On the Irolo line, work was commenced in December, 1880. The line reached Texcoco, 39 kilom., in November, 1881, and Irolo, 90 kilom., in December, 1882.

From the Reyes station, on the main line of the Interoceanic, starts a short branch of 17.700 kilom., to unite that station with the City of Mexico, which was put in operation in May, 1882.

The company acquired the line, 84 kilom. long, from Arcos to Izucar de Matamoros, and from the latter town to Tlancualpi- can, 40 kilom.

At the present time, it is constructing a line from Ohietla, on the latter line, towards Guautla, which will facilitate the expor- tation of many products by shortening the distances between certain parts of the State of Morelos and the line to Vera Cruz.

The main line of this company from Vera Cruz to Puente de Ixtla rises first to the central plateau, which commences 171 kilom. from Vera Cruz; then continues on the central plateau 467 kilom. to Hepantla, reaching its highest altitude above sea- level, 2576 meters, at Oalpulalpam. From Ilepantla follows a descent as far as Puente de Ixtla.

The Interoceanic railroad, in the part constructed and in operation, serves principally the agricultural interests of the

Mexican Raileoads And The Mining Industry. S23

regions wMch it traverses, and wMcli are so favorable for this industry. In the State of Morelos the production of sugar- cane represents a formidable capital, and engages, by prefer- ence, the attention of landowners.

That part of the State of Morelos crossed by this line gives its returns from -the transportation of woods and cereals. In the State of Hidalgo, pulque is what produces freights. The States of Tlaxcala and of Puebla also contribute, especially with their agricultural products. The State of Vera Oruz contributes its fruit.

The mining industry is but secondary in the zone which is traversed by this railroad. In the State of Morelos, the districts of Yau tepee and Huautla contain mines which are worked on a limited scale. However, the State of Puebla has several mining centers, such as Tlancualpican, Chiautla, Cuyuaca, Te- peyahualco, and other carboniferous centers, such as Acatlan and Izucar de Matamoros.

The connections of this railroad are: at Puente de Ixtla, with the Mexico, Cuernavaca and Pacific railroad; at Tlalmanalco, with the Chaleo and icaezingo railroad, 95 kilom. ; at the City of Mexico, with all the roads which center there ; at Irolo, with the Hidalgo railroad ; at San Lorenzo, with San Nicolas, 17.300 kilom. ; at Arcos, with the line to Atlixo, Matamoros and Tlancualpican, 40 kilom. ; in Puebla, with the Mexican railroad and with the Oaxaca and Industrial railroad ; in Vir- reyes, wuth San Juan de los Llanos, 11 kilom. ; in San Marcos, with the Mexican railroad and with Nautla ; in Jalapa, with the Coatepec railroad.

For import-traf&c this line has for its competitor the Mexican Railroad, which, although it has heavy grades to overcome in the ascent, is 123 kilom. shorter in its route. The goods-trafl&c, and, above all, the passenger-traffic, prefers the most direct lines on account of the shorter time required, and also on account ot the standard gauge, which makes the motion more comfortable.

VII. The Monterrey and' Gule Railroad.

This line affords a direct communication between Tampico, the second important port on the Gulf of Mexico, and the northern part of the Mexican Republic. The concession for its construction was granted in November, 1887, and the line

324 MEXICAN EAILROADS AND THE MININa INDUSTRY.

was subsidized with bonds, at the rate of $5000 per kilom. ; the bonds being issued at 90 per cent, of their par value, with in- terest at 6 per cent, a year. By special concession, the line was prolonged in 1889 from Monterrey to Trevino station, on the International railroad, by which means the Monterrey and Gulf became connected with the railroad-system of Central Mexico and with that of the United States.

Beginning at the general Trevino station, the line is 95 kilom. long to Monterrey; to Victoria City, 390 kilom.; and to Tam- pico, 625 kilom.

In October, 1888, the work was commenced, and was con- tinued without interruption until the line was opened for oper- ation September 13, 1891.

The line is of standard gauge, 1.44 meters, the maximum grade is 1.5 per cent., and the least radius of curvature is 186 meters. The country followed by the location is easy and not much broken, — which has almost done away with the necessity for costly constructions and heavy earthwork. Of engineering works, there are only the bridges across the great number of water-courses that descend from the Sierra Madre. The longest bridge is that over the Purificacion river, which measures 243 meters.

Prom Trevino to Monterrey, the descent is along wide canons of the Sierra Madre, folloMung a line marked out by the struc- ture of the mountains. From Monterrey to San Juan the line follows the north bank of the Silla river to its confluence with the San Juan river and the Kamos river. As soon as the road has crossed these three rivers, it changes its direction, continu- ing SE. as far as Tampico, traversing the agricultural zone of Victoria City. From Altamira, it runs parallel to the river Tamesi all the way to Tampico.

The agricultural products, the timber and the cattle of that region and foreign imported goods have gained great facilities of transportation to the frontier States over the Monterrey and Gulf line, which have cheapened the cost of freights on such merchandise.

After Trevino, the places of greatest importance reached by this line are Monterrey, Montemorelos, Linares, Ciudad Vic- toria and Tampico.

Mining, formerly of little importance in this zone, is now be- coming a notable factor in the export trade.

Mexican Railroads And The Mining Industry. 825

The mines of the San Carlos mountains, Croix, San Jose, Hidalgo, Miqnihnana, Bustamante, Palmillas, and some in Huevo Leon, contribute their part of the traffic on this railroad to supply the smelters at Monterrey.

The Monterrey and Gulf railroad connects with the Interna- tional railroad at the general Trevino station ; with the Mexican national railroad at Monterrey; and with the Mexican Central at Tampico.

Vin. The Sonora Bailroad.

The concern which was to construct this railroad was organ- ized under the name of Sonora Eailroad Company, Limited,’ and the first reconnaissances were commenced in February, 1880, starting from Guaymas. Construction was com- menced in May of the same year, continuing until the comple- tion of the road, which was put in operation in October, 1882.

The concession of the Government allowed a subvention of $700 per kilom. in cash, which was collected upon 422 kilom. of line from Guaymas, the port on the Gulf of California, to Hogales, a town at the dividing-line between Mexico and the United States.

The only places of great importance which exist in the re- gion traversed by this railroad are Guaymas, Hermosillo and Magdalena. The rest of the towns touched by this road are of minor industrial or commercial importance.

Batamotal is the door of the valley of Guaymas, a region very productive of cotton and cereals ; and the station is the nearest to the country watered by the Yaqui river.

Mayortena is situated in the center of the cotton district.

Ortiz is the shipping-point for the very rich mines Dura and Suaqui,' and for the product of the coal-fields of La Barranca’’ and San Marcial.”

Torres station is in railroad-communication with the famous chines “ Prietas,” Zubiate,” Trinidad,” Los Bronces,” California,” and many others.

Hermosillo is a commercial center of importance as the capi- tal of the State of Sonora.

Pesquiera is the station used by the agricultural and manu- facturing interests of the Los Angeles factory.

Garbo station is in the center of a region of great promise in mining. Bacuachito, Santa Elena and San Juan are the most notable mines in the district.

326 Mexican Railroads And The Mining Industry.

The Santa Ana station is the terminus of the wagomroad which connects the Altar district with the railroad.

The town of Magdalena is also a center of commerce for this line.

Cerro Blanco is connected by a narrow-gauge line of railroad with the mining concern of the same name.

IvTogales is the terminal station of the line. Before the rail- road was opened in 1882, this was a ranch, with, at most, ten shanties; at present it is a flourishing city, with more than four thousand inhabitants, and with a characteristic commerce, notable for the great harmony existing between the Mexican and American towns, which are almost confounded, being only separated by an imaginary boundary -line.

At IN’ogales, the Sonora railroad joins the lew Mexico and Arizona railroad and the Atchison, Topeka and Santa Fe sys- tem of American lines.

This railroad has the standard gauge of 1.44 meters ; the heaviest grade is 2 per cent., and the smallest curve-radius is 175 meters.

The bridge over the Sonora river, which is 94.63 meters long, in three spans, is the chief engineering structure ; it is of iron, and on a system like the Warren. The other bridges and culverts are of small importance, but considerable in number, having a total length of 10,369 meters.

As appears above, the Sonora railroad serves principally the interests of the richest raining regions of Mexico, in which the development of mining, by its operation, has been the conse- quence of the great reduction of freights, and other expenses.

IX. The Hidalgo Eailroad.

The first concession for this railroad, given in 1878, contem- plated the construction of a line which should start from the Teoloyucan station, in connection with the Mexican Central and Mexican railroads, and with another line which was to start from Irolo, where there is a connection with the Mexican and Inter oceanic Vera Cruz railroads: the new road to terminate in Pachuca, with a branch to Tulancingo. Both main road and branch were to unite at the San Augustin station, and the latter was to start from the Tepa station. In 1880 the company was authorized to prolong its line to the port of Tuxpan, on the

Mexican Raileoads And The Mining Industry. 32Y

Grulf of Mexico. The same company was authorized in 1888 to construct also the hTorth-Eastern railroad, which, starting from Mexico, terminated in Tizayuca, a station on the line from Teoloyucan to San Augustin.

In this way there was formed a combination which gives direct communication between the capital of the Eepublic and the important mining town of Paehuca, and which, when it has reached Tuxpan, will offer the shortest line between the City of Mexico and the Gulf.

Most of the country traversed these lines is little broken, being a part of the extensive plains in the valley of Mexico be- tween Lakes Texcoco, San Cristobal and Zumpango. Only in the vicinity of the river Papalate, and in the ascent of the water- shed between the valleys of Mexico and Tulancingo, and after- wards in the descent to Los Pomeros, there is some compara- tively rough and broken ground. The maximum grade is 1.80 per cent, compensated in the curves. Of the latter, the sharp- est has a radius of 150 meters.

The line of theHorth-West, including the branch to the cus- tom-house at Santiago Tlaltelolco, is 52 kilom. long, from Mexico to Tizayuca. The several lines which compose the system of the Hidalgo railroad have altogether a length of 162 kilom., divided as follows :

From Tizayuca to Pachuca, 59 kilom. ; from Tepa to Tor- tugas, passing through Tulancingo, Y4 kilom. ; from San Augus- tin to Irolo, 30 kilom.

Beyond doubt, the Hidalgo is the road that has contributed most to benefit the mining industry in Pachuca and Keal del Monte, by cheapening freight-rates on salt supplies, ores and bullion.

X. The Mexican Southern Railroad.

The Government of the State of Oaxaca obtained in April, 1886, for the construction of a railroad between Tehuacan and the capital of the State, a concession, which was amplified two years after, so that the railroad might be prolonged on one side to Puebla and on the other to Tehuantepec, and was then trans- ferred to an English company, which commenced reconnais- sances immediately. Grading was commenced in 1889, and the first division of 127 kilom. was finished from Puebla to Tehuacan in January, 1891, and in August of the same year

328 Mexican Eailroads And The Mining Industry.

97 Idiom, further, to Teeomavaca. In 1892 the railroad was completed in its total length, between Puebla and Oaxaca, of 367 kilom.

Starting from the city of Puebla, this railroad runs to Tehua- can over an almost level country, with insignificant grades. The steepest grade is 1.80 per cent., and the sharpest curve has 191 meters radius. The gauge of the line is 914 mm.

Between Tehuacan and Tecomacava the country descends, rapidly, with a difference of level of 416 meters in 33 kilom.,. and the location had to be made zigzag, in order to secure a practicable grade. As far as Tomellin, the line follows the- gulches of the Salado, Grande de Quiotepec, Tomellin and San Antonio rivers, with curves of as little as 88 meters radius and short tangents, following which are grades which used to be as great as 4 per cent, to ascend the mountain-range which intervenes, as far as Las Sedas, 44 kilom., before arriving at Oaxaca. The descent to Oaxaca commences abruptly, with a maximum grade of 3.75 per cent, and never less than 1.50 per cent. The curves are continuous.

The formation of the mountains has not permitted an eco- nomic location in this section, either for the construction or for the maintenance of way. The line follows the gulches, and although it is located out of range of the highest floods in the rivers, the currents may undermine the embankments, for which reason constant vigilance and frequent repairs are needed. Moreover, as the line consists more of curves than of tangents, there is extra resistance to traction ; and the rolling-stock suffers greatly; and the length and speed of trains must be reduced; all of which makes operation very costly.

As engineering works of importance may be mentioned the bridge over the Salado river, which is 100 meters long, di- vided into two spans, and two bridges over the Rio Grande of Quiotepec, one 100 meters and the other 80 meters long, in two spans each. The trusses are tubular, of the English pin- and-link type.

In the canon of the river Salado, or Cues, there are three tunnels, with a total length of 300 meters. Between Tecoma- vaca and Oaxaca are three other tunnels and a considerable number of bridges, as well as culverts and water-passes. The agricultural region traversed by this railroad is fruitful in the

Mexican Railroads And The Minino Industry. 329’

different products of cold, temperate and tropical climates, and derives the greatest direct benefit from the road. The mining region near Oaxaca is the only one which has profited by it,, namely, through the line to Puebla.

The Mexican Southern Eailroad connects with the Inter- oceanic, the line to Izucar de Matamoros, the Industrial and the Mexican railroads at Puebla (50 kilom. long), with the Es- peranza at Tehuacan, and with the branch (30 kilom. long} from Las Pilas to Tlacotepec.

XL The Mexico, Cuernavaca and Pacieic Eailroad.

By a decree dated May 30, 1890, the first concession was ex- tended to this enterprise, which it was stipulated should be con- structed as a line from Mexico to Cuernavaca, the capital of the State of Morelos, and thence to the Barra of Toconoapa,. with permission to prolong the line as far as Palizada, on the Pacific coast. In the following year the concession was trans- ferred to the present company, which received some franchises with respect to the metalliferous deposits which might be found during the construction of the line, and to the free importation of a specified list of articles. Xo subvention was given to the company. In 1895, a change in the contract stipulated that the line should pass through Chilpancingo, the capital of the State of Gruerrero, and terminate in Acapulco. At the same time a subsidy was granted, consisting in a payment of thirty Mexican dollars annually for every kilometer in operation dur- ing fifteen years, payable in customs-duties. In 1899, another change provided that the line should follow the Balsas river unto a junction with the Inguaran railroad, and finally termi- nate at the port of Zihuatanejo, on the Pacific coast. Chil- pancingo was to be reached by means of a branch-line.

Construction began in 1892, and at the present time 292. kilom. have been completed between Mexico and the Balsas river.

On account of the difficult ground, some engineering works of great importance have had to be constructed, among which may be pointed out the De la Mano gulch ; the viaduct between Cuernavaca and Puente de Ixtla; and the bridge, 266 meters long, over the Balsas river.

The most important places upon this line are Cuernavaca

330 Mexican Railroads And The Mining Industry.

and Puente de Ixtla, where there is a connection with the In- teroceanic railroad of Vera Cruz, Iguala and Cocula.

The advantages which the agricultural industry of the State of Morelos derives from this line are very conspicuous, espe- cially for the sugar plantations. The mining industry of the State of G-uerrero is also benefited. The mining towns of Taxco, Huitzuco, Tehuilotepec, Limon, Teloloapan, etc., are now enjoying easy and cheap transportation for their products.

XII. The Rio Grande, Sierra Madre and Pacieic Railroad.

Two lines are included in this concession : one from Juarez City to Corralitos; and the other from Corralitos to Mag- dalena, to connect with the Sonora railroad, having a sub- vention of $8000 per kilom., payable in bonds of the Redeem- able Interior Debt. The concession was granted March 24, 1896, and construction was commenced at once from Juarez City. The road is now complete for 250 kilom. It has a tem- porary bridge over the Rio Bravo (Rio Grande), to connect it with the railroads of the United States. Between kilometers No. 182 and No. 183, a branch, 6.575 kilom. long, leaves the main line and runs to the mines of San Pedro.

XIII. The Chihuahua and Pacific Railroad.

Under the name of the Trevino and Pacific railroad a con- tract was made in May, 1891, for the construction of a series of lines which should connect with the International, the Monterrey and Gulf and the Mexican Central railroads, and terminate on the Pacific coast. This concession was trans- ferred and modified March 31, 1897, and it was stipulated that the road should begin in Chihuahua, to terminate in the State of Sonora. Only 600 kilom. of this road were to be subsi- dized with $8000 per kilom. in bonds of the Redeemable Inte- rior Debt.

There are now constructed 200 kilom. of this road, between Chihuahua and Minaca. Cusihuirirchic, Magistral, San Luis Gonzaga are mining towns which already utilize it, as do also, in a certain degree, although at some distance from it, the min- ing centers of Batopilas, Remedies, Arechuivo, etc.

Mexican Railroads And The Mining- Industry. 331

XIV. Mighoaoan and Pacific Railroad.

This line begins in Maravatio, on the Mexican National rail- road. The main line to Zitacuarois 100 kilom. longjthe max- imum grade is 2.5 per cent, and the sharpest curve has 114 meters radius; the gauge of the line is 914 mm.

Upon the branch which starts from kilom. 46 towards An- gangueo, with a length of 736 meters, and on the branch which starts from kilom. 49 towards the Trojes smelter, and is only 1076 meters long, the curves are as low as 96 meters radius, and the grades as high as 4 per cent.

This railroad is of great importance for mining, since it fol- lows the valley between the mountain-ranges of the mining regions of Angangueo and Tlalpujahua, and has, as its center of operations, the Trojes metallurgical works.

XV. The Mexican Northern Railroad.

This line, called at first the Mining railroad, received a con- cession, without subvention, March 20, 1890. The whole sys- tem has a length of 130 kilom., of which the main line is that which begins at Escalon, on the Mexican Central railroad, and terminates in the mining town of Sierra Mojada, with a length of 125 kilom. ; the rest of the system is composed of short branches, for the service of mining concerns. This line, which is of interest to mining only, has largely contributed to the de- velopment of that industry. In the fiscal year 1898-99, the freights over it amounted to 363,786,441 tons, chiefly ores, coal and wood.

XVI. Railroads in Yucatan.

The network of railroads in the State of Yucatan and a small part of the State of Campeche is of great importance from a commercial point of view, and with especial relation to the hennequin industry. The high price which the hennequin fiber has reached in the markets of the United States and Europe has induced the extension of plantations on a large scale to places where the construction of railroads was neces- sary to prompt communication with the ports of exportation.

Merida, the capital of the State of Yucatan, is the center to which converge all the constructed lines, the names and lengths of which are as follows ;

S32 Mexican Raileoads And The Mininh Industry.

Merida to Progreso, . , .

Kilom,

Meters.

Merida to Izamal,

Merida to Izucakab (line to Peto),

Merida to Tunkas (line to Valladolid), .

Branch from Conkal to Progreso, .

Merida to Campeclie, . . .

Branch from Uman to Hunucma, -

Branch to Lerma,

At the present time this system is being extended in the eastern part of Yucatan. Apart from its effect in stimulating the plantations, it will constitute a network of strategic lines for the protection of public tranquillity.

XVIL Eailroads in the Federal District.

The street-railroad lines in the City of Mexico are worth mentioning. They have a total length of 97.570 kilom.

Ill the reconstruction of the lines to Tacubaya, San Angel, Mixcoac, Tlalpam, Coyoacan, Tlaxpana and Oolonia de Arqui- tectos, Peralvillo and Belem, Feral villo and La Viga, Central Dircuit and Guadalupe Hidalgo, animal has been replaced by eilectric traction.

The reconstruction of the rest of the lines continues with activity, so as to adapt them to the electric system, which, with- out doubt, will be used all over the city before the end of 1902.

XVIII. General Conclusions.

The recent great extension of the railroad-system has in- creased to a remarkable degree the importance of Mexican mining. Distant regions, almost inaccessible before, have been opened to the visits of engineers, promoters and working min- ors, and the great mineral production of Chihuahua, Durango and Coahuila, etc., bears witness to the result.

The railroads have not only reduced freight-charges on ores Rnd supplies, hut also permitted the introduction of modern machinery, the weight and hulk of which would have prevented its transportation by any other means. This has led to the adoption of new mining and metallurgical methods, together with the new apparatus.

The exportation of the richer ores, for perfect treatment, has been made possible by the same agency. A few years ago no

Mexican Raileoads And The Mining Industry. 333

'One imagined that the low-grade products of the mining centers of Guerrero, Hidalgo, Michoacan, Guanajuato and other States, .and even the really poor ores and the very dump-piles, could be worked, so as to yield, with profit, almost the total amount of the precious metals which they contain. Yet this is now done, ufter paying the cost of transportation to Aguascalientes, San Luis Potosi, Monterrey or Chihuahua, — important metallur- gical works, the creation of which we owe to the facilities of transportation furnished by the railroads.

Such mining concerns as were in the country were seriously distressed by the scarcity of fuel, which was more and more notable as time advanced. Mining companies, like some at Pachuca and Peal del Monte, went so far as to buy timber lands partially deforested, to replant them, and submit them to a ra- tional exploitation, under the premonition of an industrial crisis for want of wood. The railroads came in time to save them from this dangerous situation, allowing the importation of coal from foreign countries, and the working and transportation of the coal of the northern frontier States of Mexico.

The railroads have not only thus aided the gold- and silver- mines, but have also helped to make possible and profitable the working of coal-mines in Coahuila, iron-mines in Durango and Jalisco, lead-mines in Sierra Mojada, and copper-mines in Aguascalientes and Michoacan.

Some specific data will give an idea of the benefits which have been wrought in favor of mining by the creation of the xailroad-system.

The use of coal was formerly impracticable; to-day coal is ‘Obtained at from $18 to $25 per ton, after deducting the waste.

Salt cost 32 years ago $0.98 per arroba, and its present price is $0.38 per arroba; the saving is 61.22 per cent. Imported iron is obtained now at 50 per cent, of the price at which it was quoted 32 years ago.

The cost of treatment, apart from the quicksilver, of a ton of ore in barrels, 32 years ago, was $12.51 ; in 1900 the cost was only $10.23, an economy of 16.21 per cent.

The cost of treatment by the jpatio process, without including quicksilver, in the Loreto hacienda, 32 years ago, was $16,57 ; in 1900 the cost was $11.59, a saving of 30.95 per cent.

The freight-charge from Pachuca to Mexico City, by wagons,

384 Mexican Uatleoads And The Mining Industry.

was |20 per ton. At present, the second-class freight-rate is |5.50 per ton on the railroad.

The freight-rate from Vera Cruz to Pachuca on wagons was very variable, but the average rate per ton maybe estimated at |120 ; at present the rate is less than |30 per ton by rail, and for coal only $12.

The mineral product in the Mexican Eepublic (a) before the building of the railroads ; (b) at the completion of the Mexican Central railroad ; and (c) at the end of the last fiscal year, was

as follows :

Years.

Gold.

Silver.

a. 1872-1873, .

. 1976,000

21,441,000

b. 1882-1883, .

. 956,000

29,569,000

6. 1900-1901, .

. 8,848,005

72,368,795

To the production during the fiscal year just ended should be added the value of the lead and copper, estimated at $15,- 134,181.

Mexico, at the present time, is not a country whose agricul- ture and manufactures leave a surplus that can be sent to for- eign countries in exchange for their products. It is principally the mining industry which pays for our outside purchases, either with the products of the mines in the shape of ores, or with silver bullion from the same source.

The future expansion of the railroad system of Mexico is thus indicated to be in a direction towards the regions of mining production, and towards the ports of exportation. A single glance at the mining- and railroad-map which accompanies this hasty synopsis will enable any one to comprehend the lines of penetration which are under construction to be connected with the lines already established : especially the Rio Q-rande, Sierra Madre and Pacific; the Chihuahua and Pacific; Michoacan and Pacific ; Mexico, Cuernavaca and Pacific ; the prolongation line from Jimenez to Parral ; the continuation line from Gruadala- jara to Manzanillo ; the line from Durango to Mazatlan, etc., — all of which are so favorable to mining that they will not only enable this industry to pay for importations, but also will leave a surplus in the country to stimulate other industries, and to be invested in internal improvements, which will con- vert the Mexican Republic into a rich and flourishing country.

The Potable \7Aters Of Mexico.

Notes on the Potable Waters of Mexico.

By Ellen H. Richards, Mass. Inst. Op Technology, Boston, Mass.

(Mexican Meeting, NoTember, 1901.)

The water-supply of a country may be considered from three points of view : (1) its abundance and availability for agricul- tural purposes ; (2) its chemical properties in their relation to manufacturing purposes; and (3) its quality and quantity as afteeting domestic consumption.

This paper concerns only those characteristics which may af- fect manufacturing and domestic uses. The so-called sanitary analyses deal not only with the common mineral elements found in water, but with organic matter and with those substances which, by their presence, indicate changes taking place through the agency of living organisms. Since these living organisms are frequently accompanied by others, capable, as we believe, of causing disease, the products of their action are looked upon with suspicion even when, as in the case of nitrates, that action may have taken place at a time long past. Therefore, upon the quality of the water-supply depends much of the history of a country, when rightly read, as well as much of its promise for the future.

Thus, the hardness,’’ or content of calcium and magnesium salts, gives a means of distinguishing at once between the waters traversing only igneous or other siliceous rocks and those coming from calcareous deposits. The presence of decompos- ing organic matter and intermediate products betrays a use of the water as the public carrier of refuse, which renders doubt- ful its fitness for domestic supply.

In certain regions, one of the most valuable historical records is made by the relative amount of chlorine in the different waters. In the absence of rock-deposits carrying salt, the chlorine present in rain and snow, and hence in mountain- streams and springs, appears to be derived from the air-borne, finely divided salt spray resulting from the beating of the ocean waves on the coast If this be true, then the amount of chlo- rine found in a given water not contaminated with chlorides VOL. . — 20

The Potable Watebs Oe Mexico.

from other sources will vary with the distance from the shore, the character of the shore, and the presence or absence of moun- tain ranges which intercept and precipitate the moisture.

The lessons taught by the study, in recent years, of the height to which fine dust rises in the atmosphere, and by the seemingly well-substantiated fact that these dust-particles con- dense around themselves a film of moisture, seem to wmirant the attempt to construct, for similarly situated regions of land, lines of equal chlorine isochlors ”), which indicate the “ al- lowable chlorine for each locality. For an accurate determi- nation, a series of tests covering a considerable time is needed; but if the volume of water is considerable, a fairly close ap- proximation may be made by a number of single tests. Thus, the isochlors for Jamaica were plotted from the results of 70 samples, collected in one journey covering the length and breadth of the island.* "Waters, both superficial and perco- lating, possess a great solvent and transporting power, so that the residual contents at any place give some indication of the distance and the rock-formations traversed since the fall of the rain or snow, and also give some evidence as to the previous use, and the cleanness or foulness, of the soil through which the waters have filtered.

These isochloric lines give a basis from which to argue that if, in a given case, chlorine is present in excess of the “ nor- mal/ it must have entered the water by human agency, thus indicating a previous use of the water by man, and hence a possible pollution. Chlorides are especially adapted to this historical tracing of use, because, as a general rule, after they have once entered the water, they are not removed either by rocks or soil, forming therewith insoluble combinations, or by plants, as a means of growth. The first of these changes occurs in the case of phosphates ; the last, to a certain degree, in the case of nitrates.

The determination of the normal chlorine of a country has, therefore, great sanitary value. Advantage was taken of the excursion of the American Institute of Mining Engineers to the Eepublic and City of Mexico to obtain samples of water, the analysis of which should at least indicate the probable

Technology Quarterly vol. xi., No. 4, Dec., 1898.

The Potable Wateks Oe Mexico.

8S7

amount of this telltale element, and furnisli both a basis and an impulse for more extensive investigations.

The inland waters of the United States, when quite unpol- luted, show one part (or less) of chlorine per million. Eoughly speaking, this point is reached at about 100 miles from the coast, and remains fairly constant for the interior. The moun- tain-lakes of the Adirondacks show less than half that amount, while bodies of water within 50 miles of the sea contain about 2.5 parts, and those within ten miles of the sea about 10 parts, per million. Every time water is discharged into a stream or underground reservoir, after use by man, it carries an excess of chlorine. Ordinary city-sewage contains from 25 to 60 parts, and house-sewage two or three times as much.

From the table of analyses given herewith, it will be seen that the Cordilleran Plateau of Mexico furnishes water con- taining approximately the same proportion of chlorine as other inland regions of North America, and that isochlors may be drawn after more determinations have been made. The results at hand will surely be of advantage in the future sanitary sur- veys, which a government so wide-awake as that of Mexico will be sure to execute.

The sample from Ajusco, on the divide, showing chlorine 6.9 part per million; that from Cuernavaca, on the Pacific side; and that from Pachuca, on the east, — each showing about 1,0 part and each about 100 miles from the coast, — may be taken as typical. The five others, placed in the first class, approach this limit, and are distributed over the plateau from north to south at distances of about 200 miles from the sea. The anciently famous spring at Thalpan undoubtedly belongs here. Unfortunately, the sample was lost by breakage of the bottle, after the preliminary test.

Classes TLa TLb and III. show from two to three times the chlorine of those waters which we may for the present assume as normal.

Class Ila includes those which show no nitrogen. In Class IB is the sample taken from the reservoir at the new dam at San Luis Potosi. This water is placed here because the anal- ysis indicates the probability that, when the collecting ground is washed clean and protected (as it is to be), this water will belong here — if, indeed, the chlorine is not quite normal.

Sanitary Analyses of Mexican Waters.

(Parts in 1,000,000.)

The Potable Waters Oe Mexico.

*8pixo xnnpiBO j ; ;

: ; -Co

: -Cl

1 'oins

i :

Sul-

phates.

V. slight

V. slight

slight

distinct

slight

slight

distinct

So3

Carbon

Dioxide.

faintly

acid

faintly

alkaline

faintly

alkaline

acid

faintly

acid

OOOOLCiO o oo o

r-J iH O O O tH (N O CI L'-

oooooo o oo o

1 -aniioiqo

1,49

sseapi'BH

Co

XH r-i

CO Jt"

d 0

d

0 g

Jb 0

Nitrites.

Nov. Dec. .001 .010

Nov. Dec. .000 .0005

Nov. Dec. .000 .001

Nitrogen

Free

Am’onia.

Nov. Dec. .200 .048 slight

V. si.

Nov. Dec. .400 .360

000*0

none

Alb, Am’nia.

Total.

!Z

o2

lO

Oi

So

aoiiinSx uo ssot;

lO 0

oi d

vrs

Ph

*To 0 X

d

itneni

-ipos

decided earthy si. floe.

V. si.

si.

earthy si. floe.

slight

earthy

and

rusty

consid.

earthy

§

consid.

earthy

yellow

'A%i

-piqmi

none

(i

slight

setthng

out

none

distinct settling out to nearly clear.

0 Co

t-H r-H

d d

d

s !

d :

locality.

Class I.

Ajusco, on the Divide, from hydrant at the station. Hydrant, Paehuca.

Fountain, Cuernavaca, Ho- tel Morellos.

Spring, Santa Barbara, on hill near Montezuma mill.

Drinking tap, Real del Monte.

Marfil, below Guanajuato, from hydrant at station.

Monterrey, spring at the Diente.

Class Ila.

Qi

q d

% pT 0

&

i s 5

. u

3

Class II5.

Dam for new supply, San Luis Potosi, not ready for use.

No.

1 -i’ c4

d d d d

06 oi

d

The Potable Waters Oe Mexico,

S39

Sanitary Analyses of Mexican Waters — Continued.

The Potable Waters Oe Mexico.

‘8Ptxo

TnnisanSisj

: :

‘apixo nintox'BD [

Cl : : cT 1

' l'. . r-H

'

! 0

distinct

slight

distinct

deci-

ded

distinct

Carbon

Dioxide.

faintly

acid

reaction

acid

faintly

acid

Ph

anuoxqo

ssanpj'BH

D Q W

M O 03 fli

W

Pu

g S

OcS

a>o

P

gs

c5§ oS OJ O Q-* O-J O'* o

00 OSl

5z;g:H;®:2;g

o3

(Sa

fcj-O

dS do

00 Oc'Jo

a

uo ssot;

o

o

*53

P

m

s .

o §1

S3 ba

Si

6J j=I P

I,

d8

Cd O

P -s

Os®

(ixiaur

-Ipss

onsid. rusty and 1

floe, v.sl. floe. y. si.

-’B

H

a a

0

'S3’*-

P

S5ffl

g

i

-piqjtix

fO OQ

a

a

f

S

"3

'03 3 o 2

X Osp

p

Oj

B:

'O

CD 03 CD 3 h a C3 p p3

aPH

The Potable Watbes Oe Mexico.

Sanitary Analyses of Mexican ’Waters — Continued.

Date of

Total Rcsi- I clue, 1

to

as

Nitrogen as Nitrates.

TJnclassipied.

Collec-

tion.

Exami-

nation.

ChloriiK

tC;-i

©

w

Iron.

Water from spring at Ube- ro plantation, Isthmus of Tehuantepec.*

Feb. 27

Mar.

Co

Co

o

Co

Water from Junnupa Eiver.*

(C

o

The other sample contains some nitrate, which, however, is not sufficient to render it suspicious ; and the ammonia is accompanied by iron — a not uncommon occurrence in deep- seated waters, especially those which have been in contact with the sandstones above the Coal Measures. The presence of chlorine without nitrates may mean one of two things : either (1) that the source of the chlorine is in old rock-formations, still bearing traces of marine dej)osition ; or (2) that the nitrates once present have been completely removed by vegetation, or that, in various transformations underground, they have dis- appeared, and with them any dangerous accompaniments.

Class III., containing the three samples from Guadalajara, gives evidence of the slow percolation of surface-drainage to the underground sources, since not only is the chlorine in- creased, but nitrates are present in high amounts.

Class IV., with high chlorine and low nitrogen in any form, should offer interesting lines of study for the geologist.

Class V., with nitrates present, stands intermediate between IV. and VI., which latter class may be said to comprise waters which show undoubted pollution, having all the marks of pre- vious use which are held in other countries to be conclusive on this point.

Class VII. contains two samples of highly-charged mineral water, in which both the chlorine and ammonia may have been derived from geological formations, rather than through con- tamination from human sources.

Further examination of the well of Guadalupe is needed to determine the geological horizon from which the water is de-

Collected by Prof. F. L. Bardwell, of the Mass. Institute of Technology.

The Potable Watebs Oe Mexico.

rived. In the case of the other well, the remarkable variation of temperature indicates that it may be a mixed water. Further tests at different seasons are needed.

The only soft waters are from the vicinity of Mexico City, Ajiisco, Thalpan, Cuernavaca, and Pachuca, and two at San Luis Potosi.

As to the mineral contents, it is not surprising to find con- siderable silica and much calcium carbonate in the waters com- ing in contact with the warm tepetate or caliche.

The comparatively rare occurrence of magnesium and of sulphates is favorable to the quality of the water for domestic and manufacturing parposes, since it is comparatively easy to remove the calcium carbonate.

The water which escapes from the plateau and passes under- ground to the sea may be considered to be represented by the sample from the river in Choy Cove, and the artesian well on the drainage-canal near Zumpango.

Mexico may act in time to save her good water-supplies, if she will take to heart the lesson, so dearly bought in the United States, that it is cheaper, as well as wiser, to protect from pol- lution than to purify afterwards.

Additional Notes,

The tap in the railroad-station at Juarez gave a hardness of 300, and showed high chlorine and sulphates, with considera- ble carbon dioxide. Ammonia, nitrites and nitrates were very low or absent. This and other evidence indicate a deficiency of nitrogen in the arid region.

It was most unfortunate that the bottle containing the sam- ple from the famous spring at Thalpan was broken before the final tests were made. The water is said to come out from under the volcanic sheet forming the last eruptive rock in the valley. The water is barely acid with carbon dioxide ; shows normal chlorine with no nitrogen in any form ; and a hardness of only 13 per million, thus sustaining the high reputation it has had for so many decades.

Some of the supplies of the City of Mexico are nearly as good as this ; others are much harder and less free from con- tamination.

That water derived from the hard soil is at times polluted,

The Potable Waters Of Mexico.

as is that from gravelly formations, is shown by a sample from Ziimpango, which gave a hardness of 63, and ammonia, 1200; nitrites, 30; nitrates, 20; with high chlorine and some sulphates.

As was to be expected, few samples gave any considerable amount of the salts of potassium and sodium. In a few cases determinations were made, and the results will be found in the table.

In consequence of the small amounts of nitrates usually present, there was, at the season in which these observations were made, very little of that growth of green plant-life which is so characteristic of many of the northern water- courses.

The objectionable blue-green alga AnabcBua was observed only once, at the Borda garden, Cuernavaca, where the air was heavy with its unmistakable odor.

A microscopical examination, made some two months after the samples were collected, showed a very wide distribution of diatoms, both of common and of unusual forms.

Varieties of tahellaria fragilana navicula and synedra were eommon. Very few green alg(B were developed. How and then a form of 'palmdla was observed.

In several samples the diatoms had a sheath or envelope of oxide of manganese, after the manner of iron oxide about erenothrix.

In conclusion, it may be stated that this examination, imper- fect as it is, was made possible by the use of a portable case of apparatus* and reagents, carefully standardized just before leaving the laboratory at Boston. By this means certain tests were made on the spot, both to determine what samples it was worth while to bring north, and to make the transportation of a smaller sample compatible with good work. Moreover, a comparison of the results reached on the spot with those of a month later permits an opinion to be formed as to the change- able character of the organic matter.

My thanks are due to Miss I. F. Hyams for aid in making the preliminary tests during the journey, and to many mem- bers of the Institute party for aid in collecting the samples.

Figured and described in tbe Technology Quarterly, vol. xiv., page 295.

The Steel-Plant At Monterrey, Mexico.

The Steel-Plant at Monterrey, Mexico.

BY -WILLIAM WHITE, JR., PITTSBURG, PA. (Mexican Meeting, November, 1901.)

History . — The making of iron and steel from the ores of northern Mexico was for years a favorite project of the late Don Patricio Milmo, upon whose estate large deposits of coal and iron were known to exist, and with whom Mr. Eugene Kelly, of Kew York, was associated.

Several expert examinations of the property were made for them; and when failing health forced Sr. Milmo to retire from active part in the matter, Mr. Kelly carried on the project and associated himself with Messrs. Vicente Ferrara, of Monterrey, Antonio Basagoiti and Leon Signoret, of the City of Mexico and other leading citizens of Mexico, Monterrey and Kew York who, in May, 1900, organized the Compania Pundidora de Fierro y Acero de Monterrey,” with a capital of |10,000,000.

The main reason for locating the plant at Monterrey was that a circle drawn with Monterrey as a center, and the dis- tance from Monterrey to Laredo as a radius, will contain all the known deposits of iron-ore of Bessemer quality, and the greater part of the available coal, in the Eepublic. Moreover, Monterrey is connected with all the Mexican trunk railway- lines, and thus with the Gulf of Mexico, and supplies, there- fore, the conditions necessary for prosperous manufacturing, namely, cheapness in assembling raw materials and means for wide distribution of product. It also has' a number of enterprising citizens, who have been successful in mining, smelting and manufacturing operations, and a sufficiently large population to supply the necessary labor.

Iron-Ore . — The company’s iron-mines are on the Carrizal mountain, on the Mexican National, and at Monclova, on the Mexican International railroad. At the former locality, two mines, Fiedra Iman and the Anillo de Hierro, sufficiently large

The Steel-Plant At Monterrey, Mexico.

to supply all present needs, are now under development. They are, reached by a 5-mile branch from G-olondrina station, on the Mexican ISTational. The ore is brought to the loading-ter- minal by two Bleichert tramways, arranged to load 1000 tons per day.

The outcrop of the Piedra Iman is a ridge 79 ft. wide and 300 ft. high ; that of the Anillo de Hierro is 120 ft. wide. Develop- ments indicate the persistence of the deposits in depth. A third very large deposit is the Ciiico de Mayo, which will be devel- oped as occasion requires. The ore of the Piedra Iman is mag- netite ; that of the Anillo de Hierro, hematite ; and that of the Ginco de Mayo, brown hematite.

The analyses of the ores by Dr. Otto 'W'uth, of Pittsburg, are as follows :

Analyses of lexicon Iron-Ores.

“ Piedra Iman.’* Magnetite.

“ Anillo de Hierro.” Hematite.

“ Cinco de Mayo.” Brown Hematite.

“ Monclova.”

No. 1.

No. 2.

Per cent.

Per cent.

Per cent.

Per cent.

Per cent.

Silicic acid

Alumina

PprnTidft of iron

Magnetic iron

Lime

Magnesia

trace

Peroxide of manganese.

Sulpliuric acid

trace

none

trace

trace

Phosphoric acid

fjoppor

none

none

trace

Metallic iron

Phosphorus

Coal. — The company owns 30,000 acres of the Laredo coal- field, and is largely interested in that of Barroteran. Develop- ments made in the latter field by the Mexican Coal and Coke Co. show a coal-seam 9 ft. thick, and of a quality suitable to the manufacture of coke for blast-furnaces.

The analysis of this coal and coke is as follows :

The Steel-Plant At Montebeet, Mexico.

Analysis of Barroteran Coal and Coke.

Moisture,

Coal.

Per cent.

Coke, Per cent.

Volatile matter,

Fixed carbon, .

. 67,70

Ash,

, 9.80

Limestone . — Monterrey is in a district which furnishes lime- stone of exceptional quality and in inexhaustible quantity.

Manganese . — Ores varying from 40 to 55 per cent, of metallic manganese, and low in phosphorus, are available, so that the manganese required for the steel-manufacture need not be im- ported.

The Plant — The plant of the company, a plan of which is shown in Fig. 1, is located on a tract of about 600 acres, 3 miles east of Monterrey. The buildings, of steel-frame con- struction, fabricated by the American Bridge Co., have the fol- lowing dimensions :

Blast-furnace stock-house,

Feet.

. 200 X 50

“ cast-house,

. 180 X 50

“ “ blowing-engine house.

. 130 X 50

boiler-house,

. 135 X 50

Open-hearth building,

. 204 X 100

Mill-building,

. 1284 X 100

Mill boiler-building,

. 200x 50

Bail-finishing building,

. 196 X 50

Foundry,

. 225 X 220

Machine-shop,

. 225 X 120

Power-plant,

. 156 X 56

Forge,

. . 100 X 50

Store-house,

. . 60 X 60

Oil-house,

Laboratory, .

A number of brick houses and offices have been and will be built, in order to keep the employers in close connection with the work; and, with the same object, a large number of tene- ments will be erected for the workmen.

The output of each department can be increased or dimin- ished as conditions warrant; and the capacity per annum may be stated in tons as follows : rails, 40,000 ; beams and shapes,

Plant of the Monterrey Iron and Steel Company.

The Stebl-Piant At Montbkket, Mexico.

40,000; billets and bars, 10,000; pig-iron, 30,000; castings, 8000 ; total, 128,000 tons.

The mills are planned for a mucli larger output than this, and could, in fact, tahe care of the product of four blast- furnaces.

Blast-Furnace . — The furnace, built by the W. B. Pollock Co. of Youngstown, Ohio, is 80 ft. high by 18 ft. bosh-dianieter, is equipped with four Massick and Crook hot-blast stoves, 19 ft. 6 in. by 75 ft. in size, and six Babcock and Wilcox boilers in batteries of 680 H.P. each. There are two pairs of vertical, compound, condensing, blowing-engines, built by the Wm. Tod Company of Youngstown, Ohio, with blowing-cylinders 84-in. by 60-in. stroke, and steam-cylinders 42 in. and 80 in. in diam. respectively. Arrangements are made to carry the molten metal direct to the open-hearth furnace. The estimated product is 350 tons of pig-iron per day.

Oen-Hearth Furnaces . — There are three 3 5-ton furnaces, and room is provided for two more, of 50 tons capacity. They are served by a 50-ton electric traveling-crane, built by the Morgan Engine Company of Alliance, Ohio, and an electric charging- machine which charges scrap and cold pig. Molten pig can be charged direct from the blast-furnace. It is intended to cast the product of the open-hearth furnace into moulds standing upright on cars. The reason for making exclusively open- hearth steel was that the wide range and variety of the Mexi- can market demand could be best met by that product; but room was provided on the plans for the addition of a Bessemer plant, adequate to a large output of rails, whenever such a course might become desirable ; so that the addition could be built without any disarrangement of the present works.

SoaUng-Bits . — The open-hearth ingots are carried in the moulds to the soaking-pits, where they are stripped by a hy- draulic ingot-stripper and placed in the pits by the traveling- crane. There are three soaking-pit furnaces, holding 12 ingots each. The lids are moved by hydraulic power. After the ingots are thoroughly heated, they are taken out and placed on a tilting-car, which delivers them to the table of the blooming- mill.

Blooming-Mill . — The mill is two-high, with rolls 40 in. in

THE STEEL-PLANT AT ilONTEEREY, MEXICO.

diameter l)y 103 in. in length, driven by a pair of 40- by 60-in. reversing-engines, built by the Wm, Tod Co. of Toiingstown, Ohio. The engines are geared 1 to 2, with cut-steel gears. The top roll is moved by an engine placed on the top of the housings, which operates housing-screws by means of cut-worm and gear. The top roll and spindles are balanced by hydraulic pressure. The mill is provided with tables on both sides, and has two manipulators,” by which the blooms are turned and handled. The tables are of such length as to permit the rolling of from V 5- to 90-ft. lengths.

Shear , — An extension of the blooming-mill table on the catcher’s side brings the product to a powerful hydraulic shear, designed to cut blooms to 200 square inches, or 20 in. or 10 in. This shear is so designed that the consumption of water will be proportional to the work performed. Room is provided for another powerful shear, to cut small pieces, such as slabs for the plate-mill and billets for the merchant-mills.

JRougUng-MUl and Heating-Furnaces , — From the shear the product goes either directly to the roughing-mill, or, if it must be heated, to two Siemens reheating-furnaces, where the blooms are charged and taken out by two Collins patent charging- and drawing-machines.

These machines were built by the Morgan Engineering Co. The mill is two-high, with rolls of 32 in. in diam. by 78 in. in length, driven by a pair of 36- by 48-in. reversing-engines. These engines are geared 5 to 7, with cut-steel gears. The mill is built on the same plan as the blooming-mill, and has the same operating and balancing arrangement, tables and manipu- lators. A portion of the product can be finished in this mill, but the greater part will be sent to the finishing-mill.

Finishing-Mill . — This is three-high, reversing, with three stands of rolls of 28 in. in diam. and 66 in. in length, driven by a pair of 36- by 48-in. reversing-engines, geared 1 to 1, with cut-steel gears. Movable tables run along the face of the train, and allow the bringing of the steel to or from any of the three sets of rolls. This arrangement permits a wide range of prod- uct, as any set will finish a piece. The front part of these tables operates on a hinge to transfer the piece from one pass to another. This mill will finish rails of from 35 to 100 lbs. per

The Steel-Plant At Monterebt, Mexico.

yard, and beams and channels from 4 in. to 24 in. in height. It will roll Z-bars, tees, angles, steel railroad-ties, tie-plates, squares and rounds — in short, will roll any shape, the area of which exceeds 4 sq. in. For smaller sizes, merchant-mills are contemplated.

Hot-Saw . — From the finishing-mill the material is delivered to a run-out which brings it to the hot-saw, and, after cutting, to the cooling-beds. Eails pass through a cambering-machine before reaching the cooling-beds. From the latter the material is conveyed by drags and delivered to the straightening-presses, shears, drills, and such other machinery as may be required for finishing. All this machinery is placed in a special building and operated by electric power. The finished material is loaded directly into cars. For beams and shapes, large beds are provided to cut and shape as may be desired by architects and builders.

Traveling- Cranes . — Each roll-train is provided with an electric traveling-crane built by the Mles-Bement Pond Co. They are designed to facilitate the handling of heavy parts, and espe- cially the changing of rolls. The crane of the finishing-mill has 60 tons capacity, and is able to lift each stand of rolls, in- cluding the housings, and replace it with another stand. As the changing of rolls usually occupies from two to three hours, this feature, which reduces the time to from fifteen to twenty minutes, will be appreciated. The blooming- and roughing- mills have 20-ton cranes, which can lift one roll at a time; and, as the changing of these rolls is not frequent, extreme expedi- tion is not so important. The output will be governed by the amount of steel delivered, but the capacity of these mills is such that they will roll the product of twelve open-hearth- or four blast-furnaces. In case the market warrants it, all that will he required will be the extension of the open-hearth and the blast-furnace departments, which is provided for in the plans.

Gas-Producers . — To supply gas to the open-hearth, soaking- pit and reheating-furnaces, sixteen 10 ft. Talbot producers are connected by underground flues with these furnaces.

Foundry . — The foundry is located parallel to the mills, in a steel-frame and brick building, 225 ft. long. The central span

The Steel-Plaht At Monterrey, Mexico. 351

is 60 ft. wide, with two bays of 30 ft. each. It contains two cupolas 72 in. in diameter, and a small one for melting brass and bronze. For melting special iron for strong castings, an 18-ton air-furnace is provided. There are four core-ovens, and a complete equipment of machinery for mixing sand, cleaning eastings, etc. ; also, a 30-ton and a 15-toii electric traveling- crane. The capacity of the foundry is 30 tons per day. It is intended to do all classes of work, from the smallest eastings to those weighing 30 tons or more.

3faehine-Sho2 — The shop is likewise located parallel to the mills, in a building of the same character and dimensions as the foundry. It is equipped with two Isiles electric traveling- cranes of 30 and 15 tons, respectively. Great care has been taken to select the best tools. Among these are : One 96- by 96-in. Mies plane; one 54- by 54- in. Pond plane; one 84-in. Pond boring-mill; one 51-in. Mies boring-mill; one 18-in. Mies Blotter; one 60-in. Mies engine-lathe; one 48-in. Mies engine-lathe ; one 32-in. Pond engine-lathe ; two 40-in. Frank- Kneeland roll-lathes, and two 60-in. Prank-Kneeland roll-lathes. In addition to these, there are numerous small lathes, slotters, bolt-cutters, pipe-machines, and a full equipment of machine- shop appliances. With the exception of the roll-lathes, each of which is driven by an independent electric motor, the tools are placed in groups, each group having its motor. The pat- tern-shop contains wood-working machinery, such as planes, circular- and band-saws, etc.

This machine-shop is intended not only to build machinery for the mills, but also to do any class of work that may be de- manded by mines, smelting-works, railroads and manufacturing establishments.

Forge . — This is a steel-frame and brick construction, 50 by 100 ft. in size, and within easy reach of the machine-shop and foundry. It has a 700-lb. and a 1700-lb. steam-hammer; also holt-, nut- and rivet-machines, blower and ten forges, with the necessary heating-furnaces. Power is supplied by a 25-H.P. General Electric motor.

Power-Plant . — The central power-station, which is a steel- frame and brick building 56 by 150 ft. in size, contains, at present, two Harrisburg tandem compound-engines 17 by 27 vor, xxxii.~21

The Steel-Plant At Monterrey, Mexico.

by 16 ill. in size, eacli directly connected to a 150-K. W, Gen- eral Electric generator. Steam is furnished by two 250-H.P. Babcock and Wilcox boilers. The plans provide for trebling the power when circumstances shall warrant such enlargement.

Store- and Oil-Rouses , — The store-house is a brick building with iron roof, 60 by 60 ft. in size and two stories high. The oil-house is also of brick, with an iron roof. They are designed to keep supplies for the mills, under the supervision and con- trol of competent storekeepers.

YateT-Suppl}J , — Water is obtained from a large reservoir Jn’E. of the , and supplied from the same source as the city, and is conveyed to a well near the blowing-engine house of the blast-furnace. Two powerful ]iumps, each of 250,000 gallons daily capacity, lift the wmter to a stand-pipe, from which it is distributed under pressure to the blast-furnace and mills. The waste-water from the blast-furnace is carried back to the reservoir through an open ditch, and the large surface of the reservoir allows it to cool to the desired temperature for renewed use. To furnish the necessary pressure for the dif- ferent hydraulic machinery, a special pressure-plant has been located between the roughing- and finishing-mills. Two hy- draulic supply pressure-pumps deliver the water under a pres- sure of 500 lbs. per sq. in. into an accumulator, whence it is distributed to the various hydraulic machines. The waste from these machines is conducted to a tank, from which it can be used again. The waste which cannot be used again is carried oft‘ by a sewage-system.

Track-System . — A terminal has been located, to make connec- tion with all the railroads entering Monterrey. Great care has been taken in arranging the track-system to facilitate the de- livery of coal, coke and ore, and the shipment of products.

Extensions to Plant . — A structural shop for bridges and buildings; merchant-mills; and wire- and plate-mills, are con- templated in the near future.

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 353

The Mechanical Feeding of Silver-Lead Blast-Furnaces.

BY ARTHUR S. DWIGHT, SAN LUIS POTOSl, MEXICO.

Mexican Meeting, Noyember, 1901.)

From the latest and best literature on lead-smelting, little can be learned concerning the present state of the art of mechanical feeding in the IJnited States. H. 0. Ilofman, in his 3Ietallurgu of Lead (5th ecL, 1899), briefly describes the main features of the system in use at Pueblo, Colo., and later (p. 235) says the only suecewssful mechanical feeding, as far as the writer is aware, is that found at the works of the Pueblo Smelting and Refining

H. P. Collins, in his Metallurgy of Lead and Silver (London, 1899), covers American practice pretty thoroughly; but as to mechanical charging, he says :

German plan of taking off the gases by means of a small iron pipe sus- pended in the center, and the plan of charging by means of cup and cone, as in iron blast-furnaces, have both been tried, but have not found favor, chiefly on account of the difliculty of obtaining free access to the furnace-shaft for barring, etc., with such devices.”

H. W. Hixon, in his Notes on Lead and Go 2 )per Smelting (3d ed., New York, 1900), gives a description and drawing of the Hixon feeding device, as originally installed at East Plelena.

Evidence that this system of feeding has passed its experi- mental stage, and deserves more serious consideration than it has heretofore received, is furnished by two large plants — the Pueblo and the East Helena — of the American Smelting and Refining Co., where mechanical feeding has been in continuous and successful operation for a considerable period ; one new plant now erecting at Salt Lake City, Utah, and one old one belonging to the same company, the El Paso works, now being rebuilt after a disastrous fire, in both of which mechanical feeding is to be a prominent feature ; one new plant of an inde- pendent concern at Torreon, Mexico, which will adopt mechan- ical feeding; and a number of other smaller plants, among

354 Mechanical Feeling Of Silvbk-Leal Blast-Fuenaoes.

whicli the Granby Consolidated Mining Co., British Columbia (a copper smelter), deserves mention.

It is the purpose of this paper to call attention to the present state of the art, to describe those devices which have come under the personal observation of the writer, and to record the results of some of his own studies and experience in connec- tion with the practical working-out of one of these systems.

The underlying principles have long been recognized and followed in the metallurgy of iron ; but as these need consider- able adaptation to meet the peculiar requirements of lead- smelting, it is believed that a fresh discussion may be useful as a beginning of a proper understanding of the subject.

Dumping material into a furnace, haphazard, cannot be regarded as feeding in the proper sense. We must appreciate the effect of the mechanical arrangement of the smelting- column upon the blast-furnace reactions, before we can intelli- gently design a mechanical feed. Hence it is thought best to lead up to the special subject through a discussion of the gen- eral subject of feeding, both theoretical and practical, calling attention to certain minutiae of the process, which, if over- looked, as has often been done, will probably cause a total failure, but which may be utilized to bring about exactly the effect desired.

I. Type of Furnace.

Let us assume that the furnace to be fed is the well-known rectangular blast-furnace developed by smelting practice in the Eocky Mountain region of the United States. A modern fur- nace of this type would have an area at the tuyere-level of from 42 by 120 to 48 by 160 in. ; an area at the top of the shaft of from 54 by 132 to 84 by 200 in., and a height from the tuyere-level to the top of the charge of from 15 to 21 ft., depending on various features of design, conditions of charge, etc.

Such a furnace should smelt from 80 to 200 tons of charge in 24 hours. By charge, I mean the total weight of ore and flux, but not including the coke, or slag that is resmelted. This slag, principally shells from pots, etc., requiring to be rehandled on account of the shots of matte and bullion which it may contain, usually amounts to from 20 to 60 per cent, of the charge. The fuel will be coke only, the consumption being

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 355

from 12 to 16 per cent, of the charge, and is burned at a blast pressure ranging from 1.5 to 4 pounds per square inch, the average, perhaps, being close to 2 pounds.

If the furnace is to be fed bj hand in the old style, two methods are common for removing the furnace-gases. They may be taken off by an opening below the charge floor, and in this case the furnace will be fed through a slot in the iron floor-plates, about 20 in. wide and extending nearly the whole length of the furnace ; or the furnace-shaft may be extended as a hood above the charge-floor level, with a down-take pipe connecting it with the flues. In the latter case, doors are pro- vided on each side of the brick or sheet-iron hood, extending preferably the whole length of the furnace, and usually having a sill, a few inches high, which compels the feeder to lift the material in his shovel, instead of dumping or shoving it care- lessly into the furnace in the easiest way.

II. Mechanical Conditions of the Smelting-Column as Affecting Blast-Furnace Eeactions.

When a silver-lead blast-furnace is operating satisfactorily, the following conditions should obtain :

1. A large proportion of the lead in the charge should ap- pear as direct bullion-product at the lead-well.

2. The slag should be fluid and clean.

3. The matte should be low in lead.

4. The furnace should be cool and quiet on top, making a minimum quantity of lead-fume and flue-dust, and the charges should descend uniformly over the whole area of the shaft.

5. The furnace-speed should be good.

6. The furnace should be free from serious accretions and crusts ; that is to say, the tuyeres should be reasonably bright and open, and the level of the lead in the lead-well should re- spond promptly to variations of pressure, caused by the blast and by the height of the column of molten slag and matte in- side the furnace — an indication that ample connection exists between the smelting column and the crucible.

In common parlance, we shall have “ good reduction ’’ when the first three of these conditions are satisfied ; and, in a gen- eral way, it may be said that the degree in which they are ful- filled is an index of successful operation.

356 Mechanical Eeehinc Oe Silver-Leab Blast-Furnaces.

I shall employ this convenient, though perhaps unscientific, use of the term reduction,’' in expressing the degree in which the furnace is manifesting its reducing-action, as measured by the three conditions above mentioned.

Por any given furnace there are five prime factors, the re- sultant of which determines the reduction, namely :

(a) Chemical composition of the furnace charges;

(b) Proportion and character of fuel ;

(c) Air-volume and pressure, to w>'hich might perhaps also be added temperature of blast ; for, although hot-blast has not yet been successfully applied in lead-smelting practice, the writer believes it is only a question of time when it will be ;

(d) Dimensions and proportions of smelting-furnace ;

(e) Mechanical character and arrangement of the smelting- column.

A thorough analysis of these five factors would constitute an exhaustive treatise on blast-furnace phenomena, which it is not intended to cover in this paper. That apparently simple, almost crude contrivance, the blast-furnace, ofiers to the inves- tigator a problem involving an endless complexity and correla- tion of forces and conditions acting together in the most subtle adjustment. To disturb one condition is likely to produce an entirely unexpected result, which it will be very difficult to trace back to its cause. False reasoning is thus due to careless observation, and has inspired many metallurgical dogmas which are a real impedjment to clear vision and intelligent progress.

The study of the phenomena of the lead blasfc-furnace is a rich field, as yet but very imperfectly exploited. The studies of the iron blast-furnace by Bell, Gruner and others, and Schertel’s studies of the Freiberg furnaces, give us a good be- ginning, but still only a beginning. We have to deal with reactions entirely different from those prevailing in the iron-fur- nace. Some of our metals must be reduced and some oxi- dized; and to steer a course through the many conflicting currents of oxidation and reduction, and, by adjusting the rela- tive importance of the various agents at our command, secure just those reactions most favorable to a good outcome, is the problem of the lead-smelter.

Returning to the five controlling factors of reduction, it will

Mechanical Feeding Of Silyer-Lead Blast-Furnaces. 857

be observed tliat all but one are susceptible of mathematical ex- pression, and their variations can be intelligently gauged. Thus we can accurately establish the composition of the charge by the weights and analyses of its ingredients ; the fuel by its weight ; the blast-volume by engine-measurement, and its pressure by the reading of a mercury-gauge, while the variable component of the furnace-factor can be expressed by the height in feet of the smelting-column. The mechanical factor, however, can be ex- pressed only in generalities and most indefinite terms. To reg- ulate it we can do much beforehand by a wise selection of ores and by intelligent preliminary preparation, crushing the coarse and briquetting the fine ; but when all this has been done, our eflbrts are largely nullified by the uncertain human element in the feeding. Even with conscientious workmen, the necessarily divided responsibility does not tend to regularity of results, par- ticularly when each feeder has his own theories, and thinks he knows, better than the superintendent, what is wanted. In certain aggravated cases of improper feeding there is no difii- culty in recognizing the symptoms ; but there remain numer- ous variations, springing from irregularities, the causes for which are obscured, and which we are prone to attribute, therefore, to mysterious or fortuitous circumstances. This no doubt explains why we so generally take it for granted that the feeding is right, and devote our chief attention to the ma- nipulation of those factors which can be mathematically regu- lated, — the slag, the fuel, and the blast, — while the importance and possibilities of the mechanical factor are generally over- looked, and its symptoms are wrongly diagnosed.

Eor instance, the importance of slag-types has undoubtedly been considerably exaggerated at the expense of the mechan- ical factor. Slags will seldom come down exactly as figured. We must know our ores, and apply certain empirical correc- tions to the iron, sulphur, etc., based upon our previous experi- ence with these ores. The necessity of such allowances is due partly to variations in weights and moisture, analytical errors, etc. ; but I venture to suggest that these empirical corrections represent also an unformulated expression of the influence of the mechanical factor on the reduction, — a function, therefore, of the ruling physical complexion of the ores, and the peculiarities of the feeding habitually maintained in the works concerned.

358 MECHANICAL EEELINa OE SILVER-LEAL BLAST-EURNACES.

Unquestionably the careful regulation of the slag is one of the foundations of good blast-furnace work; but it is not only, or always, the most important one. With a given ore-charge, large reciprocal variations may be produced in the composition of the resulting slag and matte by merely changing the mechan- ical conditions of the smelting-column; and since the efficient utilization of both the fuel and the blast must be controlled in the same way, we are justified in considering the mechanical factor as perhaps the dominating agent of reduction in the lead blast-furnace. Hence the importance of keeping the closest regulation upon it will be clear. But as we have no means for mathematically gauging it, our only recourse is to seek a correct adjustment, and then, by eliminating all uncer- tain elements, maintain it as a positive constant. With the dominating factor thus brought under control, we can, with much greater certainty, adjust the slag, fuel and blast, with a resulting gain in efficiency of furnace-work and metal savings.

III. The Eeduction oe Iron, the Key to the Process.

While it is true that a proper saving of lead is one of the chief ends of the process, it is, nevertheless, a fact that the out- put of lead is so dependent upon the behavior and reactions of the iron that we would do well to fix our chief attention upon that metal as the key to the situation. In short, the success of the process very largely depends upon reducing just the right amount of nascent Fe to throw the Pb out of the matte, while the rest of the iron is reduced only to FeO and enters the slag. Too much Fe reduced will form an iron-sow in the hearth. With a given ore-mixture, slags of varied composition may be produced by simply changing the degree of oxidation or reduction prevailing in the furnace; and this we may regulate by means of the various agents at our command, already referred to.

On account of its ready susceptibility to reducing influences, lead in the slag or matte affords a most sensitive index of the degree of reduction in the furnace. The lower the percentage of lead in these products, the greater the reduction indicated.

There are two principal reactions by which the reduction of iron from its oxides is accomplished in the blast-furnace: (1) by contact with solid incandescent carbon; and (2) by the action of hot reducing-gases, principally 00.

Mechanical Heeding Of Silver-Lead Blast-Furnaces. 359

In actual working, we doubtless always get a resultant of both modes of reduction, acting simultaneously ; but it is pos- sil)le to make one or the other strongly predominate, and give character to the entire process. We know that reduction by solid carbon is much the more wasteful of the two ; however, outweighing in importance this loss of fuel-efficiency, there is in lead-smelting a far more serious objection to permitting the reduction to be accomplished by this means. Since this presupposes that both reduction and fusion shall be accom- plished within a zone of incandescence, and since reduction must necessarily precede fusion, the combustion of the fuel must be carried high up in the shaft, leaving less room for the absorption of the heat of the escaping gases. This means a comparatively hot top, and more or less volatilization of lead.

On the other hand, the second mode of reduction is the ideal condition for the lead-fuimace. It means keeping the zone of incandescence low in the charge-column, leaving plenty of room above for the gases to yield up their heat and reducing- power to the descending charge, so that by the time they escape at the charge-floor level they will be well-nigh spent; temper- ature and volume will be diminished ; and the low velocity of exit will tend to minimize the loss of lead in fume and flue- dust.

The opinion expressed by some writers that high tempera- tures in lead-furnaces should be avoided is based on a miscon- ception. In any case, temperatures must exist which are suffi- ciently high to volatilize all the lead in the charge, if other conditions permit. A high temperature before the tuyeres, moreover, means fast smelting; and fast smelting, under proper conditions, means a shortening of the time during which the lead is subject to scorifying and volatilizing influences. Again, a rapidly-descending column of charge, constantly replenished with cold ore on the top, serves to absorb efiectively the heat and reducing-power of the gases, and acts as a most effective dust- and fume-collector. It may truly be said, in considering the question of long flues, bag-houses, and other adjuncts for saving metals, that the most efficient of all dust-collecting apparatus ought to be the furnace itself.

In the practice of twelve years ago and earlier, particularly when using fuel-charges of mixed coke and chai-coal, reduction by carbon was probably the rule; and, as is well known, the

360 Mechanical Febdinh Op Silyer-Lead Blast-Furnaces.

fuel-percentage then required was very high. There is good reason to think that we have still much room left for improve- ment along this line in our average practice of to-day.

xknalyses of the waste gases would, perhaps, furnish a good test of fuel-economy. Indeed, I have made many such analyses, with significant results, which I am not now prepared to discuss.

IV. Volume and Pressure oe Blast.

1. Volume,

It is customary in smelter-practice to supply a battery of fur- naces from a large blast-main, connected with a number of blowers. As the blast-currents will always give preference to the lines of least resistance, it is evident that we have only to increase the internal resistance of any one furnace in the bat- tery to diminish considerably the volume of air that furnace will take, while the others will be favored unduly. Only by keeping all the furnaces on approximately the same charge,, and with the same height of smelting-column, can we secure anything like uniformity of operations and close regulation in all. The truly rational plan would seem to be, to have a sepa- rate blower of variable speed, directly connected to each fur- nace, so that the volume of air delivered could be gauged by the revolutions of the blower. This plan of direct connected blowers has received a number of trials, but usually has been abandoned in favor of the common blast-main. The writer’s own experiments in this direction, on several difterent occa- sions, with trials extending over considerable periods, have been so uniformly favorable that he is forced to ascribe the failure of other attempts of the kind to some outside reason, — probably lack of proper modification and adaptation of the other smelting-conditions.

The peculiar atmosphere of reduction required for lead-fur- naces depends upon a correct relative proportion of the two counter-active elements, carbon and oxygen. If too much air is supplied, the balance will be disturbed, and the furnace will show signs of deficient reduction, which will commonly be in- terpreted as calling for more fuel. This extra fuel, however, will be a sheer waste, as its object is to burn up surplus air. There is a double waste, therefore, — of coke in the furnace and

Mechamcal Feeding Of Silvee-Lead Blast-Furnaces. 861

of coal imder the boiler. In this hypothetical case the true remedy would evidentl}” be to cut down the quantity of air.

To get the highest eliiciency out of our furnaces, we must re- lieve them of all unnecessary work. Burning up excessive coke and air is as hard work as smelting ore. Too much fuel inva- riably slows up a furnace ; it also drives the lire upwards in the stack, and gives predominance to the reduction by solid car- bon. The maintenance of a minimum fuel-percentage, with a correctly-adjusted volume of air, will therefore tend to promote the conditions under which iron will be reduced by the gases, rather than by solid carbon, and will favor furnace speed.

2. Pressure.

It is necessary to make a clear distinction between the vol- ume and the pressure of the blast, and to recognize that dis- tinct effects can be produced by intelligently varying these two factors independently. I have shown the importance of secur- ing a proper adjustment of the volume; the question of pres- sure will now be considered.

Pressure necessarily involves resistance ; and the blast-pres- sure, as registered by a simple mercury-gauge on the bustle- pipe, may be increased in two ways : —

First : By increasing the volume of air forced through the interstices in the charge. This is the wrong way; but, unfor- tunately, it is only too common in our practice, and therefore deserves to be mentioned, if only to be condemned.

Second: By leaving the volume of air unchanged, but in- creasing the friction offered by the interstitial channels, either by making them smaller in aggregate cross-section (which means a finer charge), or by making them longer (which means a higher smelting-column). A correctly-graduated internal re- sistance is, therefore, the only true basis for a high blast-pres- sure, which, so produced, will bring about rapid smelting, a low zone of incandescence, and a very vigorous action upon the ores by the gases in their retarded ascent through the charge- column. These conditions promote the reduction of iron by CO. The adjustment of internal resistance, which is thus clearly the main factor, can only be accomplished by the correct feeding of the furnace.

362 Mechanical Heeding Of Silver-Lead Blast-Furnaces.

Y. The Mixing of Charge-Ingredients.

It is self-evident tliat the more thorough the preliminary preparation of the charge before it reaches the zone of fusion, the more rapicllj' can the actual smelting proceed. A piece of raw ore that finds itself prematurely at the tuyeres, without having- been subjected to the usual preparatory processes of drying, heating, reduction, etc., must remain there until it is gradually dissolved or carried away meehanieally in the slag. Any such occurrence must greatly retard the process. It would seem, by the same reasoning, that an intimate mixture of the ingredients of the charge should expedite the smelting. On this point I must differ from the conclusions of Henrich,* who advocates a system of feeding which shall deliberately avoid an intimate mixture of ingredients, the idea being to prevent the premature formation of a slag in the upper regions of the furnace. My experience leads me to believe that there is no danger of this premature slag-formation if the furnace is smelt- ing properly, and that to follow Henricli’s procedure would be merely to treat one of the symptoms -without striking at the root of the evil. I therefore advocate the intimate mixture of the charge-ingredients in all cases.

YI. Mechanical Abeangement of the Charge-Column.

The theory of feeding is exceedingly simple ; and if the prac- tice were as easy as the statement of the principle, this discus- sion could be considerably abbreviated. If the charge-column were composed of particles of uniform size, the ascending gases would encounter the least resistance close to the furnace'-walls, and consequently would travel by that route in preference to the central portion of the shaft. This more restricted channel would necessitate a higher velocity, so that not only would the charge in the central portion be largely deprived, of the benefit of the heat and redueing-action of the gases, but the portion traversed would be overheated ; many of the particles would be sintered to the walls or carried off as flue-dust; slag would form prematurely ; a large part of the fuel would be wasted, causing a dissipation of the metal-values; — in short, all the

JEJngineenng and Mining Journal, December 27, 1890, and June 6, 1891.

Mechanical Eeeding Of Silver-Lead Blast-Furnaces. 36S

rave irregularities and losses would ensue wliich accompany over-fire.

In actual practice, the charge is never perfectly uniform, but is a mixture of relatively coarse and fine material. This gives us the means of correcting the tendency of the gases to follow the walls b}" classifying the charge, and lodging the finer par- ticles close to the walls and the coarser in the center. The correct adjustment will he found when the current of gases is forced to ascend uniformly over the whole area of the smelting- column ; and we may say, in brief, that a furnace-top uniformly and quietly smoking over its whole area is the visible sign of a properly-fed furnace.

On the other hand, no furnace in which the coarse is fed against the walls and the fine in the middle can possibly do good work. If the case is an extreme one, a disastrous condition will be rapidly brought about, which will soon terminate the campaign.

Vn. Effect of Large Charges.

It has frequently been remarked that, within certain limits large charges give more -favorable results than small ones; and numerous attempts have been made to account for this fact. My observations lead me to ofier the following as a rational explanation — at least in cases vrhere ore and fuel are charged in alternate layers. Large ore-charges mean correspondingly large fuel-charges. The gases can pass readily through the coke ; and hence each fuel-zone tends to equalize the gas-cur- rents by giving them another opportunity to distribute them- selves over the whole furnace-area, while each layer of ore sub- sequently encountered will blanket the gases, and compel them to force a passage under pressure, which is the manner most favorable to effective chemical action. The idea is somewhat similar to that of the filter-charges described by Grlenn,' which probably owed their efl3.cacy to the same cause.

An interesting observation may be made at this point. In hand-feeding it is customary to charge ore and fuel in separate layers, while in mechanical feeding by the charge-car they are usually dumped into the furnace simultaneously, and thus the separate layers are obliterated. A mechanically-fed furnace

Engineering and Mining Journal July 19, 1884.

364 Mechanical Feeding Of Silver-Lead Blast-Furnaces.

will, therefore, lack the distributing zones, which are such a safeguard against the consequences of bad feeding in hand-fed furnaces ; and hence it is that much more care must be exer- cised to secure a proper placing of coarse and fine materia] in the case of mechanical feeding — though the nearer perfection Ave can come in either case, the better operating-results 'wq shall obtain. This may throw some light on the cause of the failure of most of the early attempts at mechanical feeding.

Till. Effect of Mechanical ChxAracter of Charge.

Tery fine charges blanket the gases excessively, and cause them to break through the layers at a few points. This leads to the formation of blow-holes or craters, which seriously dis- turb the operation, cause loss of raw ore in the slag, and are accompanied by all the evils of over-fire. A charge containing a few massive pieces, the rest being fine and pulverulent, is a still more unfavorable combination. On the other hand, a very coarse charge permits too ready an exit to the gases, but in the end tends likewise to over-fire and poor reduction.

TV'hile the opposite extremes of too fine or too coarse charges exhibit many similar symptoms in actual operation, they are to be cured by exactly opposite remedies: the former lAm must correct by briquetting a considerable portion (though, prefer- ably, not all) of the fines ; and the latter, by a preliminary crush- ing of the coarser material. Thus, from opposite extremes, we approach an ideal result, Avhich we may roughly describe to be a mixture in Avhich about one-third is pieces from 5 to 2 in. in diameter, one-third from 2 to J in., and the remaining third from J in. down. The coke is better for being someAvhat broken up before charging, and a reasonable amount of coke-fines, such as usually accompanies a good quality of coke, is not in the least prejudicial. The common practice, therefore, of handling the coke by forks and throwing away the fines, is to he con- demned as an unwarranted waste of good fuel. The slag on the charge should be broken to pieces at most 6 in. in diameter. The common practice of throwing in whole butts of slag-shells is bad ; and there is no economy in using the slag hot, as some imagine. Odd charges, not hot, are what we want.

A reasonable amount of moisture in the furnace-charges is beneficial, provided it be in such form as to be readily dried out

Mechanical Feedinh Of Silver-Leaf Blast-Furnaces. 365

ill tlie furnace. It is often advantageous to wet down the orc- iiiixtures while bedding them, or to sprinkle the charges before feeding to the furnace. It is true that driving off this water must consume fuel, but not so much as would be lost if the smelting-zone crept up in the shaft. Large doses of water applied to the furnace direct, facetiously called ‘hydraulic

are hardly pardonable under any circumstances, though they are sometimes indulged in as a drastic measure to subdue excessive over-fire, when other and surer means of curing the disorder are not recognized. One of the chief merits of mod- erately sprinkling ore-charges before feeding is, that it gives, in many eases, a more favorable mechanical character, approxi- mating a lumpy condition in too fine a charge, and assisting to pack too coarse a charge.

IX. Different Behavior of Coarse anf Fine.

When a dry mixture of coarse and fine material is handled or moved, it will be observed that the coarse and fine particles behave quite differently. When taken up in a shovel, the fine will predominate in the bottom and center, and the coarse on the top and sides ; when thrown from the shovel, the coarse will outstrip the fine and fall beyond it. In building a conical pile, a very noticeable separation will take place, the coarse rolling to the base of the cone, leaving the fine nearer the apex. When thrown against a surface, the coarse will rebound, while the fine will not. Thus the coarse is mobile, while the fine is sluggish ; and the former will take advantage of every oppor- tunity, by crowding, bouncing and rolling, to separate itself from the less lively portion. This simple fact, once thoroughly appreciated, gives us the key to the practical side of the feed- ing-problem, both manual and mechanical. It is not sufficient to toll our feeders to throw the coarse in the middle and the fine against the sides; if it be easier to do it some other wmy, our instructions will count for but little. The principle of least resistance must be considered in the directing of labor, as in other branches of mechanics. A desired result can be best se- cured by making the right way easier for the workman than the wrong way. This may sound like a glittering generality ; but it has a peculiarly practical bearing on the present subject. For instance, it is pretty generally conceded that the open-top

866 Mechanical Feeding Of Silver-Lead Blast-Furnaces.

furnaces, fed "by hand through a slot in the floor-plates, do not give as satisfactory results as the hooded furnaces with long

Open-Top Furnace ; Central Feed.

feed-doors on both sides. Figs. 1 and 2 will perhaps suggest a reason for this preference. In the open-top furnace it is com-

Fig. 2.

Hooded Furnace ; Side Feed.

paratively diflicult to throw to the sides, the difiiculty being greater as the slot is narrower. The greater part of the charge, therefore, will drop near the center, making that place higher

MECHANICAL EEBDINd OF SILVBE-LEAD JBLAST-FURNACES. 367

than the sides ; the fine will tend to stay where it falls, while the coarse will tend to roll to the sides, or gradually be crowded in that direction as the charge descends in the furnace; and there will result just the reverse of the proper mechanical ar- rangement in the shaft. In the hooded furnace, on the other hand, most of the material will naturally fall near the doors as it is shoveled in, causing the sides to be higher than the center, while the coarse stufl‘ rather favors the center by reason of the force of the throw — a tendency which will be increased by the fine remaining near the walls, and the coarse rolling and crowd- ing toward the center, as the charge descends. Other condi- tions being equal, therefore, the hooded furnace will naturally be more correctly fed and will yield more satisfactory results.

X. The Future of Mechanical Feedino.

Once a proper balance of conditions has been found, absolute regularity of routine is the secret of good results. It has been shown how the main chemical reactions in the blast-furnace are modified and regulated by the feeding. Hence no feature of furnace-economy is more deserving of attention than this.

An experienced and intelligent feeder owes his merit to his conscientious regularity of work. He may have to vary his programme somewhat when he encounters a furnace that is suftering from the results of bad feeding by a predecessor ; but his guiding principle is first to restore regularity, and then maintain it. A poor feeder can bring about, in a single shift, disorders that will require many days to correct, if indeed they are corrected at all during the campaign. The personal ele- ment is productive of more harm than good.

The sweeping statement that the hand-fed furnace, normally operating, is properly fed in proportion as the feeder, faithfully following a well-ordered programme, approximates the regular- ity of a machine, is not far from the truth. Why not, then, eliminate entirely the personal element, and design a machine for the purpose ? This is a comparatively simple matter, if we know exactly what we want to accomplish. The mysteriously potent virtue popularly attributed to hand-work of all kinds we can dismiss, without much discussion, as the oft-repeated argu- ment of the opponents of progress since the first introduction of machinery. KTo one will deny that the desired regularity of VOL. xxxir. — 22

368 Mbohanical E'1Edi]S;<3- Of Silvbe-Lbad Blast-Fubistaces.

system can be attained more perfectly by a xnacbine than by a human being, and thus the primary feature will be secured. Admitting that irregularities are bound to occur from lack of adjustment of fuel, blast, composition of charge, etc., even with the most perfect feeding, these irregularities can usually best be treated by removing their cause, while the feeding is kept ab- solutely uniform. However, if it is deemed desirable, it is still perfectly feasible to modify temporarily the action of a mechan- ical feed by various expedients, and thus, perhaps, assist in re- storing the normal condition. Human intelligence may still have just as free a scope with mechanical feeding as with hand- feeding, to adjust and correct; but with a well-adjusted feed, the less variation is indulged in, the better.

Ho valid ground now exists for prejudice against mechanical feeding in lead-smelting. As has already been explained, it is in successful operation in a number of large works, and is being installed in others. The fact is, and must be clear to any one iu close touch with actual conditions, that our furnaces have outgrown the shovel, and we have passed the limit of effi- ciency of the old methods of handling material for them.

The tendency of modern progress has been to concentrate the business of smelting at a comparatively few plants, cen- trally located with respect to ore- and fuel-supplies, and favored with ample railroad-facilities. This tendency has been empha- sized by recent industrial consolidations whereby the silver-lead smelting business of the United States and Mexico has passed into comparatively few hands. The logical outcome will be the introduction of labor-saving machinery and methods, not merely for the purpose of reducing operating-expenses, hut also by reason. of the physical necessities consequent upon crowding the capacity of single plants.

There is no need, therefore, to plead the cause of mechanical feeding. We must come to it in spite of ourselves. I wish to make the point, however, that whatever motive may lead to its introduction (a desire to reduce operating costs, scarcity of labor, limited space, etc.), its chief justification will he discov- ered, after it has been successfully installed and correctly ad- justed, in the consequent great improvement of general oper- ating-results, metal-savings, etc. It will remove one of the most uncertain factors with which the metallurgist has to deal,

Mechanical Feebin& Oe Siltbr-Leai) Blast-Eurnaces. 369

thereby bringing out into clearer view for study and regula- tion the other factors (fuel-and-blast proportion slag-composi- tioHy etc.) in a way that has hardly been possible under the irregularities consequent upon hand-feeding.

XL Historical.

This paper is intended, not to give a full history of mechan- ical feeding in lead-smelting practice, but merely to discuss some of the attempts to solve the problem which have come under the observation of the writer. These will be considered separately, by classes.

(a) Gwp-and-Cone Ikeding-Devices . — So far as I am aware, the first lead-furnace in the United States fed by means of the cup- and-cone system was the round furnace of the St. Louis Smelt- ing and Eefining Co., at St. Louis, Mo., which I saw in opera- tion about 1888. It is probable, however, that previous attempts had been made to follow German practice, as exemplified in the Pilz furnaces at Freiberg and the copper-furnaces at Mansfeldt; for Hahn, writing in 1882,* refers in a general way to unsuc- cessful experiments with the cup-and-cone feeder, which failed because the heat crept up in the furnace and gave over-fire. At the time of my visit to the St. Louis works, the furnaces chanced to be showing signs of over-fire; but this may not have been their characteristic condition.

Mr. A. F. Schneider, who built the St. Louis furnaces, after- wards built, at the Perth Amboy (X. J.) works of the Guggen- heim Smelting Co., round furnaces, with cup-and-cone feeders, which were probably quite similar to the earlier furnaces at St. Louis. Good results are said to have been obtained from these furnaces ; but the running of refinery-products is not a good criterion of what they would do on general ore-smelting.

The cup-and-cone is an entirely rational feeding-device for a furnace of circular cross-section, and it certainly ought to be possible to adjust it so as to give as satisfactory results in lead- as in iron-smelting; but it is unquestionably unsuitable fora furnace of rectangular cross-section. Figs. 3 and 4 show such a furnace (original Aguascalientes copper-furnace), provided with two sets of circular cup-and-cone feeders. Disastrous re-

Mineral Besources of the United States Washington, 1883.

370 Mechanical Eeehinc Oe Silver-Lead Blast-Eurnaces.

suits followed the use of this device on lead-furnaces; and the reason will be clear when it is considered that the circular dis- tribution so given cannot possibly conform to the requirements

Fro 3.

Original Type of Aguascalientes Copper-Furnace. Front Elevation.

of a rectangular furnace. Figs. 5 and 6 show a more rational plan of bell-and-hopper feed for such a furnace. It was de- signed for the Perth Amboy works, but details are lacking as to its record.

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 371

(b) FfoH Curtain or ThimbleJ — About ten years ago some of the American works adopted the Pfort curtain, which ivas used ill Germany as early as 1842 for feeding iron-furnaces.

Fig. 4.

As adapted to lead-furnaces, it consisted of a thimble of sheet- iron hung from the iron deck-plates, so as to leave about 15 in. of space all around between it and the furnace walls, which

372 Mechanical Deeding- Of Silver-Lead Blast-Furnaces.

space, being connected with the down-take of the furnaces, served to collect and carry off the gases. In use, the thimble

Fig. 5.

Pertli Amboy, N. J. , Lead-Furnace. Vertical Section, at Eight Angles to Fig. 6.

was kept full-charged up to the level of the charge-floor. For a time it was a very popular feeding-device, because it made a

Perth. Amboy, !N. J., Lead-Furnace. Vertical Section, at Right Angles to Fig. 5.

ing. Pig. 7 shows the arrangement as used by the Omaha and Grant Smelter, Denver, Colo.; the El Paso Smelting Works,

374 Mechanical Feebinc Of Silver-Leab Blast-Furnaces.

B1 PasOj Tex., and the refinery of the Consolidated Kansas City Smelting and Refining Co. at Argentine, Kans. It was finally found to give bad results in the furnaces, and was discarded everywhere.

H. O. Hofman'' gives as his reasons for its failure, first, that it was impossible to see how the charge sunk, except by dropping it below the edge of the thimble ; and, second, that the time for barring down wall-accretions was lengthened, because it was necessary to remove the curtain before, and put it back again after, barring.’’ Although these reasons are important, there was another considerably more important, namely, the thimble caused irregular furnace-work and high metal-losses, because it produced in the smelting-column a dis- tribution of coarse and fine exactly the reverse of correct.

Fig. 7.

Pfort Curtain.

Moreover, by taking ofif the gases close to the walls of the furnace, it emphasized the evil by inducing them to follow up the walls directly from the tuyeres, without permeating the smelting-column to its center.

. (e) Terhune Gratings, — R. H. Terhune has patentedf a device for securing a proper distribution of coarse and fine in the fur- nace, which consists of two inclined “ grizzlies ” or gratings, one on each side of the furnace, sloping downward from the edge of the charge-floor toward the center-line of the furnace. The bars of the grizzly are tapered toward the center of the furnace, leaving the open spaces narrow near the furnace-walls and wider toward the center ; so that, as the charge is dumped on the grizzly from the side of the furnace, a classification of the sizes will be ejSfected as the charge slides down the grizzly.

Metallurgy of Lead, 5th editian, page 234. t U. S. Pat. NTo. 585,297, June 29, 1897.

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 375

and, as a result, the particles of smallest diameter will be de- posited near the walls, and those of the largrest diameter in the center. While correct in its conception, this device has not been actually used in practice, so far as I know.

I will now describe in detail the systems of Pueblo and East Helena, as the two most important installations now in opera- tion, and indicative of the present line of development in this branch of the art.

XII. The Pueblo System.

The Pueblo Smelting and Pefining Co., now known as the Pueblo plant of the American Smelting and Refining Co., was probably the first of the large lead-smelting concerns in the United States to practice mechanical feeding with any marked degree of success. Under the direction of Mr. W. W. Allen, then General Manager, an entire remodeling of the plant was undertaken, providing for the cheap handling of material in a manner far in advance of anything that had yet been attempted in lead-smelting. The mechanical feeding of the blast-furnaces was an essential feature of the general scheme, and deserves recognition, as practically the first successful device of this kind on a large scale, and the prototype of that class of feeding-de- vices which uses a large car. It was put into operation about 1896 ; and the following description will give a general idea of the system in operation about two years ago, since when, pre- sumably, no serious change has been made.

The Pueblo furnaces have a cross-section at the tuyeres of 60 by 120 in. The tuyeres, 4 in. in diameter, are arranged six on each side, with water-cooled nozzles projecting 6 in. inside the jackets, thus leaving a distance of 48 in. across the furnace between tips of tuyeres. The height of smelting-column above tuyere-level is about 20 ft. The furnace-gases are taken off below the charge-floor, and the furnace-tops are closed by sim- ple hinged and counterweighted doors of heavy sheet-iron, which can be opened by the attendant just previous to dumping the charge-car. In the side-walls of the shaft are iron door- frames, bricked up while the furnace is in operation, but per- mitting, when necessary, the repairing or barring-out of the shaft, without interfering with the movements of the charge-car

U. S. Pat. 554,562, Feb. 11, 1896. H. Gc. Williams.

overlieacl. Extending across the shaft, about 18 in. above the normal stock-line, are three A-shaped cast-iron deflectors/' dividing the area of the shaft into four equal rectangles. The pur- pose of these deflectors will be explained presently.

Fig. 8 is an ideal vertical section through the ore-bins and blast-furnaces, showing plainly the general arrange- ment. Figs. 9, 10 and 11 give the charge-car in detail and Fig. 12 indicates the scheme of feeding. From the charge-car pit, conveni- ently located between the ore-bins and the fuel- and flux-bins, there extends an inclined trestle-track on an angle of to the level of the charge-floor of the fur- nace-building, in line with the battery of furnaces. The gauge of this track is ap- proximately equal to the length of the furnaces at the top. The charge-car, actuated by a steel tail-rope,, moves sideways on this track from the charging-pit to any furnace in the battery. The hoisting-drums are located at the crest of the incline within the furnace-building, so that, the attendant can have a view of the car at all times. At the far end of the fur- nace-building is a tightener- sheave, with a weight to keep proper tension on the tail-

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 37T

rope. The charge-ear has a capacity of five tons, with an A- shaped bottom ; so that, in discharging, the material is divided

Fig. 9.

and thrown well against the side-walls of the furnace. The locking-mechanism of the car is arranged with levers, so that one attendant can quickly trip the bolt and discharge the car.

Fig. 10.

While the car is making its trip to the furnace, the charge- wheelers are in the bins, filling their buggies. They work in pairs, each man weighing up in his buggy one half-charge of

S78 MEGHAi5:ICAL FBBDIlSra OF SILVER-LEAD BLAST-FURNACES.

a particular ingredient. They then separate, each taking his proper place in a line of wheelers on either side of the charging- pit, awaiting the return of the car. When it has returned to position, the wheelers successively discharge their buggies into the opposite ends of the ear, partners thus discharging equal quantities of the same ingredients simultaneously, until the charge is complete ; the coke being added last, to avoid crush-

Fig. 11.

ing it. The car can thus be very quickly filled, if plenty of wheelers are provided, to be always ready with their loads when the empty car returns. This involves, however, moi’e wheelers than would be actually required merely to move the material to the best advantage ; for they have not only to move the materia], but also to wait for the car, and for their proper turn. The system is, therefore, not strictly economical of labor.

A vertical section through the car thus filled by dumping

Fig. 12

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 379

Furnace-Toi>,

380 MECHANICAL EEBDINa OF SILVEK-LEAD BLAST-FUBNACES.

from the two ends will show an arrangement of coarse and fine material far from regular. Analyzing its structure, we shall find two conical piles near the ends, each with a core of fine stuff, in line with a and c (Fig. 12), while in the valley between these piles is a miscellaneous collection of coarse and fine, with the coarse distinctly predominating in the center of the car (b.) The use of the A-shaped cross-deflectors will, therefore, be clear. Being set directly under the average position of the cores of fine stufi, they serve to scatter the fines as they drop from the charge-car. Thus, by the A-shaped bottom of the car, the charge is thrown against the walls, while by the A-shaped cross deflectors the irregularities of longitudinal arrangement of material are to some extent corrected. There can be no doubt that without these deflectors the feeding of the furnace would be a failure. Although a sort of compromise, it is never- theless successful.

Two years ago, when I last saw these furnaces, there was a decided tendency to run rather hot on top; and that this was quite persistently the case seemed probable from the fact that the practice at that time was to put as many as three charges in rapid succession into the furnace, so as to cool the stack and carry down the over-fire. It is therefore reasonable to suppose that the feeding was not as perfect as it might be.

The saving effected by mechanical feeding at the Pueblo plant over the old system of hand-feeding is $63 per day, in- cluding the cost of steam, but not wear and tear on machinery. This estimate is based on running the entire battery of 7 fur- naces at the average daily tonnage of 100 tons ore per fur- nace-day, and the saving is therefore 9 cents per ton of ore. This is distinctly a maximum figure; and, with fewer furnaces running, the fixed charges of the mechanical feed would soon increase the cost per ton to such a point that the two systems would be about equal in economy.

XIII. The Bast Helena System.

While visiting in a consulting capacity, two or three years ago, the East Helena, Montana, plant of the American Smelt- ing and Refining Co. (then belonging to the United Smelting and Refining Co.), the writer had occasion to make a series of studies in mechanical feeding which elucidated a number of

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 381

underlying principles in an interesting way. These studies also resulted in the evolution of an eminently satisfactory feed- ing-device. The successive steps in its development are suflBi- ciently instructive to warrant a detailed and critical descrip- tion.

Mr. H. 'W'. Hixon, then superintendent of the plant, had de- signed and installed the original form of the mechanical feed- ing-device ; and the subsequent modifications, which I will de- scribe, were made with the co-operation and concurrence of Mr. Hixon, whose practical skill and experience contributed very largely to the final success.

(a) The Hixon Mechanical Feed {Original Form ). — The furnace- plant at East Helena consisted (as late as 1900) of four lead- furnaces, each 48 by 136 in., with a 21-ft. smelting-column, and a small copper-furnace, which, however, was not arranged to feed mechanically. They were all open-top furnaces, fed through a slot over the center, the gases being taken off below the floor. The charges for hand-feeding were elevated from the furnace- floor level by two platform-elevators. The furnaces were capa- ble of smelting about 180 tons of charge (ore and flux) per 24 hours, using a blast of 30 to 48 oz. pressure, furnished by two E. P. Allis duplex horizontal piston-blowers, air-cylinders 36- in. diameter by 42-in. stroke, belted from electric (induction) motors.

The Hixon mechanical feed was designed to meet existing conditions, and to supplant hand-feeding, without irrevocably cutting oft‘ the possibility of conveniently returning thereto in an emergency. It had some mechanical faults, to be discussed later, which Avould undoubtedly have been avoided if an entire new plant had been designed instead of the modification of an old plant.

The details, shown in Fig. 13, include a track-way at right angles to the battery of furnaces, leading from a point near the bins to a transfer-carriage standing on the charge-floor be- tween two of the lead-furnaces. The car is hoisted up the in- cline endwise by a direct-hoisting cable, the winding-drum of which is situated on the upper level, and actuated by a fric- tion-gear connection with a line-shaft. The transfer-carriage, upon which the charge-car stops at the crest of the incline, can, after detaching the hoisting-cable, be moved over the tops of

382 MECHAillCAL EEBDING OE SILVER-LEAD BLAST-EURNACES.

tlie famaees by means of a tail-rope system. The gauge of the charge-car is 4 ft. 9 in . ; that of the transfer-carriage, 11 ft. 8 in. After discharging into the proper furnace, the transfer-carriage

returns with the empty charge-car to the head of the ineline,- the hoisting-cable is hooked on ; and the empty car is lowered down the incline to the charging-pit below the level of the bin-

East Helena System : Vertical Longitudinal Section and Plan of Incline.

Mechanical Feeding Of Silyer-Lead Blast-Furnaces. 383

floor. It should be noted that a hand-winch is necessary to start the car from the transfer-carriage and down the incline. A switch at the lower end of the incline permits two charge- ears to be employed, one being filled while the other is making

Fig. 14.

the trip. Figs. 14, 16, 16 and 17 show details of the charge- cars and transfer-carriage.

The charge-car is 10 ft. long by 4 ft. wide by 3 ft. 6 in. high, and holds a total charge of 6 tons of ore, flux, slag and fuel, the total of ore and flux being usually 8800 lbs. The bottom

Fig. 15.

is flat, consisting of two doors, hinged along the sides, and kept closed in the center against the weight of the contents by means of chains wound about a longitudinal windlass-shaft on top of the car.

The charging-pits are decked with iron plates, leaving a slot, VOL. xxxTr.-~23

384 Mechanical Feeding Of Silvek-Lead Blast-Furnaces.

along the center of each car, exactly like the feeding-slot in the furnace-top. As the wheelers bring the ore-buggies containing weighed-up ingredients for the charge, the buggies are taken by two attendants especially responsible for this duty, who care- fully distribute the contents of each buggy along the whole length of the charge-car by dragging it along the slot while in the act of dumping. Each buggy contains but one ingredient, and they follow one another in a prescribed order, so as to secure thin layers in the charge-car. The coke, instead of being placed on top of the other ingredients, as at Pueblo, is divided into three or more layers.

Fig. 16 .

East Helena Charge-Car and Transfer-Carriage. Elevation.

The first few trials of this feeding-device were not satisfac- tory. The furnaces quickly showed over-fire and decreased lead-output, which would not yield to any remedy except a re- turn to hand-feeding. "When the writer visited the plant in April, 1899, the furnaces were being fed by hand, the mechan- ical feeding-device having lain idle for some weeks. On request, it was started up ; and, as before, the furnaces began within a few hours to show signs of over-fire. A consideration of the principles already stated will clearly indicate why. The total charge being dropped in the center of the furnaces, a central core of fines was produced ; the lumps tending to roll and arrange themselves along the walls. We thus had

MECHAKICAL EBEBIlSfG OP SILVER-LBAB BLAST-FURNACES. 385

exactly the reverse of the proper disposition of coarse and fine in the furnace. (See Fig. 18.) A study of the minutiie of the actual operation showed that this wrong tendency was empha- sized by the presence of the chains suppoi’ting the bottom- doors of the charge-car. On unwinding the windlass-shaft and releasing the chains to dump the car, the bottom-doors were

East Helena Transfer-Carriage. Plan.

prevented from dropping by the wedging of the chains in the charge, which, in turn, arched itself more or less against the sides of the car ; hence the doors opened but slowly, and often had to be assisted by an attendant with a bar. In consequence of this slow opening and the jamming of the coarser part of the charge around the chains, considerable fine ore sifted out first,

386 Mechanical Feeding- Of Silvbe-Lead Blast-Furnaces.

and, dropping into the center of the furnace, formed a ridge, from the slopes of \Yhich the coarser part of the charge, the last to fall, naturally rolled oft* toward the side-walls of the fur- nace. This fact, once determined, proved to be the key to cor- recting the evil ; and the classification of material eft*ected by the gradual opening of the car-bottom was taken advantage of to produce a reversal of the former distribution in the fur- nace. The attendant operating the tail-rope mechanism was instructed to move the transfer-carriage rapidly backward and forward over the slot while the first one-third or one-half of the charge was dropping, and, during the rest of the discharge, to let the car stand directly over the slot and permit the coarser portion to fall in the center of the furnace. Two piles of com- paratively fine material were thus left on the charge-floor, one on each side of the slot. These were subsequently fed hy hand, with instructions to throw the material well to the sides of the furnace.

The furnaces were running very hot on top when this modi- fied procedure was begun. In a few hours, the over-fire had dis- appeared; the lead-output was increasing; and the furnaces were running normally. This result was accomplished about May 1, 1899. Prom that time until about Pebruary 20, 1900, the Hixon mechanical feeding-device was continuously operat- ing under this modified procedure. The behavior of the fur- naces and the metal-results during that period were about the same as they had formerly been witb hand-feeding.

At first glance, considering the few men required on the charge-floor, there appeared to be a considerable saving in labor by the use of the mechanical feed ; but in reality this was oft*8et hy increased labor required downstairs — extra wheel- ers, charge-car feeders, and the higher wages paid to the few' men in attendance on the machinery. In order to get a fair comparison, the following figures were taken :

In October, 1898, three furnaces were in operation with hand- feeding. The pay-roll for that month showed an average labor- cost on the blast-furnace of $42.06 per furnace-day. In Octo- ber, 1899, the same number of furnaces were in operation with the Hixon feed under the modified procedure, and the average labor-cost for the month was $41.00 per furnace-day, a saving over hand-feeding of only $1.60 per furnace-day, or y-yC. per

Mechanical Feeding Op Silver-Lead Blast-Furnaces. 387

Fig. 18 .

East Helena System, with Spreader and Curtains. Experimental Form.

388 Mechanical Feedinh Of Silver-Lead Blast-Furnaces.

ton of charge. These figures will be commented upon later in comparing with the work at Pueblo.

(b) The Dwight Spreader and Curtains Modifyhig the Hixon Feed . — In January, 1900, the writer had occasion to visit the East Helena plant again, to investigate an interesting problem involving the peculiar behavior of certain cokes. A cheap local coke, logically and commercially the fuel that ought to be used at this plant, had invariably caused bad work in the furnaces ; and the only coke that seemed to give good results was Penn- sylvania or West Virginia coke, which cost at that time, de- livered at the works, about |4.25 per ton more than the local coke. This difference in the cost of coke amounted to about |130 per furnace-day, or nearly $12,000 per month, in the op- erating cost. A line of investigation was undertaken which developed some most interesting facts, and finally was entirely successful in demonstrating the cause of the difficulty with the coke. A new practice was established which entirely corrected the difficulty, and made it possible to use the local coke with eminent success. A full account of this investigation of the fuel-problem and the results obtained would not be strictly in place in this jpaper. Suffice it to say, the peculiar behavior of the cokes was traced, strange as it may seem, to improper feed- ing of the furnaces.

The “ modified procedure ’’ with the Hixon feed, which had been in operation for nine months with apparent success, was found, after a thorough study, to be far from perfect. On ac- count of certain peculiarities of construction in the furnace-top, particularly the narrow feeding-slot in the top-plates, it was very difficult for the workmen to throw the fine stuff with their shovels as far to the sides as the furnace-walls, according to in- structions. This fact, clearly established by repeated tests, has been already mentioned above.

It became necessary, then, to design some kind of mechan- ical spreader which should properly distribute the material as discharged from the Hixon charge-car, and at the same time to dispense entirely with the partial hand-feeding which had been necessary with the “modified procedure.’’ VTe tried a tempo- rary wooden construction and obtained eminently successful results, developing a complete solution of the feeding-difficulty, and also of the trouble with the cokes. After getting the feeder

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 389

correctly adjusted, it was found possible to obtain better metal- lurgical results with the cheap local coke than had formerly been obtained with the much more expensive Eastern cokes.

Figure 19 shows the principle of the scheme adopted. In the temporary construction used for purposes of experiment, the flanged cast-iron plates around the feeding-slot were pushed back some distance, and a roof-shaped spreader, with slopes of 45®, was set in the gap, leaving two openings, each about 8 in. wide, on either side of the spreader. The doors of the charge- cars, when hanging down, would just clear the ridge of the spreader. In order to test thoroughly the working of this de- vice before a permanent installation was made, the spreader was built of wood, with the faces sheathed in sheet-iron. The original plan provided for two iron curtains to be hung, one on each side of the spreader, and so adjusted, with respect to the trajectory of the ore-stream from its slopes, that the fine material would just clear the edge of the curtain and continue without interference until it lodged close to the furnace-walls. The pieces of large diameter would not clear the edge of the curtain, and the angle at which they rebounded would carry them toward the center of the furnace. The object of the cur- tains was twofold : (1) to classify the coarse and fine, as just explained ; and (2) to protect the side-walls of the furnace from abrasion by the lumps of ore.

The same results might have been accomplished by hanging, in the path of the falling material, iron gratings which would permit the fine to pass, while the coarse would be intercepted. But the curtain was thought better, because a very fine ad- justment was possible by simply raising and lowering the curtain a few inches, so that any degree of classification could be obtained. The lower the curtain was placed, the smaller the diameter of the particles that could pass unmolested, until a point would finally be reached when the whole stream would be interrupted and diverted from the sides; this, of course, being the extreme limit. If desired, the curtain could be ad- justed at such a height that the medium-sized particles could lodge with the fine along the walls. When the conditions of the charge made it desirable to feed the coarse and fine together against the walls, this could be quickly provided for by rais- ing the curtains still higher. Thus, by experiment, it would

S90 Mechanical Feeding Of Silver-Lead Blast-Furnaces*

be possible to find the adjustment best suited to the conditions of the furnace and the particular nature of the charge.

In the temporary construction first installed, the curtains were provided for by simply bending down the thin sheet-iron floor underlying the cast-iron plates of the furnace-top. Crude as they were, these curtains did their work of classifying sur- prisingly well. isTo. 5 furnace was first to be changed in the manner described ; and an immediate improvement in its work was shown. It averaged better in speed, with lower blast, lower lead in slag and matte, and better bullion output than the other furnaces operating under the old system. In fact, the results were so satisfactory that spreaders and aprons .of similar temporary construction were promptly placed on all the other furnaces, and remained in service until, in the course of time, they were replaced by more permanent constructions of iron, modelled along the same general lines. It is suffi- cient proof of the good behavior of the furnaces, while being fed in this way, that during the several weeks that these wooden spreaders were in place over the furnaces, and in direct contact with the furnace-gases, they were not once in danger of taking fire.

The temporary curtains, being made of thin sheet-iron, naturally wore out very quickly, and thereafter the whole charge, both coarse and fine, fell from the spreader against the walls. This style of feeding also gave good results, as the fine tended to remain close to the walls during the descent of the charge, while the coarse tended to roll and to work its wmy towards the center of the shaft. During the gradual wearing- away of the curtains, it was possible to observe the behavior of the furnaces under the difierent adjustments of curtain-length. The writer is convinced, from his observations at that time, that the curtain is a valuable adjunct to the spreader as a feeding- device.

At this juncture, the writer was called away from East Hel- ena by other business ; but the general scheme, as established by the preliminary studies and experiments, was carried out. The temporary wooden spreaders were soon replaced with spreaders of iron, the only diflterence being that they were lowered so as to bring the ridge of the spreader level with the floor, somewhat as shown in Fig. 20, though it must be

Mechanical Feebinh Oe Silyer-Leah Blast-Furnaces. 391

admitted that this sketch is based upon possibly imperfect in- formation. I understand that no curtains were used in the permanent constriietion, since the feeding seemed to be satis- factory without their aid. In their absence, the lowering of the spreader was a proper step, as it distributed the material fully as well, and caused less abrasion of the walls. Moreover, it permitted a smaller opening in the furnace-top, which, on ac- count of deficient draught, was an important consideration.

The Hixon feed, as thus modified by the writer, seems to

Fig. 20.

East Helena System : Final Form (approximate).

have given complete satisfaction at East Helena since February, 1900. Moreover, the spreader has been adopted as the basis for the mechanical feeding-device in the new plant of the American Smelting and Refining Oo., just completed in Salt Lake City, Utah.

The writer is not aware of any previous application, at least in lead-smelting practice, of the principle of the fixed spreader. At the same time, no special claim of originality is made for it, since it is no more than the development, for a rectangular furnace, of the general idea of the cup-and-cone

392 Mechanical Feeding Of Silver-Leiad Blast-Furnaces.

feed of a round furnace, adapted to meet particular necessities. It is to be considered as a design rather than a new invention.

XIV. Comparison of Systems.

The cup-and-cone feeder, however suitable for round furnaces, can be briefly dismissed as inapplicable to the rectangular lead- furnace. Of systems which have been in continuous opera- tion for considerable periods, and can thus afford positive data for intelligent comparison, there remain, therefore, only two which I can discuss, namely, the Pueblo and the East Helena system.

Mechanical Design , — The Pueblo system is better, because simpler in construction and operation. Xo time is lost in at- taching and changing cables, operating transfer-carriage, etc. In comparing the two we should remember, however, that the Pueblo plant was remodeled throughout with the special ob- ject of mechanical feeding in view, while at East Helena a system had to be devised to fit a plant already built. Both systems have the main track for the charge-car running directly over the tops of the furnaces, and this is a positive inconvenience when any furnace-repairs are under way.

Charge- Car , — The Pueblo ear is simpler, because it can be dumped instantly, having no chains or other attachments to jam in the charge and prevent the doors from opening promptly. East Helena has two cars in service, while Pueblo has but one; but inasmuch as the latter, owing to fewer delays, makes a round trip in about one-half the time of the former, there is not much difterence on this score.

Filling Charge- Car , — The Pueblo system is quicker, in that two buggies are dumped simultaneously, one into each end of the car, while at East Helena each buggy is handled singly, and the contents are carefully distributed along the length of the car. We may roughly estimate, therefore, that, per ton of capacity, it takes to 3 times as long to fill the East Helena car; and this means longer waiting on the part of the wheelers, and consequently greater cost of moving the material, representing probably about 7 or 8 cents, in favor of Pueblo, per ton of charge handled. However, both methods of filling the car are wasteful of labor, because they require the wheelers to time their movements by the movements of the charge-car.

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 393

It is true that these men require some period of rest, and it may be urged that they might as well rest while waiting for the charge-car as any other time; but it is a practical fact that the actual labor of moving the material can be apportioned with far greater economy if this work can be made ind.ependent of all other considerations, and if the men can shape their work strictly in accordance with the requirements of that work only. Of course, the necessities of the furnace are imperative, and there must be no delay in sending up a charge when it is needed; therefore enough men must be on hand during the whole shift to meet the necessities that may arise in any ordi- nary emergency; and this means the carrying of more men than could efficiently and easily move the required tonnage of material.

Fu.rnace-Itesults . — It has been shown that the arrangement of coarse and fine material in the East Helena car is adapted to give a uniform longitudinal arrangement in the furnace parallel to the furnace-walls, while in the Pueblo car we have two cores of fine material, the correct subsequent rearrangement of which is necessarily difficult. The cross-distributors in the Pueblo furnace probably accomplish this as well as can be expected ; but at the very best they must be regarded as a compromise. Manifestly, it is better practice so to plan the operations that the governing principle and ultimate requirements shall be kept constantly in view from the start. It is believed that the better distribution in the East Helena car results in greatly increased regularity of furnace-running, less tendency to over- fire, some economy in fuel, less accretions formed on the furnace- walls, and larger metal-savings. If the half of these conclusions are true, then the saving of 7 or 8 cents a ton at Pueblo, which can be traced almost entirely to the cost of filling the charge- car, sinks into insignificance in comparison with the important advantage of having the furnaces uniformly and correctly fed.

XV. The True Eunction of the Charge-Car.

It will assist us in the study of problems of this kind to de- fine the radically essential feature of a mechanical feeding-de- vice as that part which automatically distributes the material in the furnace, whatever appropriate means may have been used to effect the delivery.

-394 MECHAriCAL FEBDIJTG OF SILVER-LBAB BLAST-FURNACES.

Taking a liasty review of the nuinerous feeding-devices that have been tried in lead-smelting practice, we cannot but remark the fact that those which depended upon dumping the charge into the furnace from small buggies or barrows failed generally to secure a proper classification and distribution of coarse and fine, and, consequently, were abandoned as unsuccessful, while the adoption of the idea of the charge-car for transporting the material to the furnace in large units seems to have been coin- cident with a successful outcome. It is natural enough, there- fore, that the car should be regarded by many as the vital fea- ture. This view of the question is not, however, in accordance with the true perspective o-f the facts, and merely limits the field of application in an entirely unnecessary way. It must be apparent that the essential function of the charge-car is cheap and convenient transportation. The distribution of the charge is an entirely different matter, in which, however, the charge-car may be made to assist, as in the Pueblo system; or entirely distinct and special means may be employed for the distribution, as in the East Helena system.

To follow the argument to its conclusion, let us imagine for the moment that the East Helena plant were arranged on the terrace-system, with the furnace-tops on a level with the floor of the ore-bins. Certain precautions being observed, the

spreader’’ would give as good results with small units of charge delivered by buggies as it now does with the larger units delivered by the charge-car, and the expense of delivery to the furnaces would be practically no more than it now is to the charge- car pit. The furnace-top would, of course, have to be arranged so that the buggies, in discharging, could be drawn along the slot, so as to give the necessary longitudinal distribution paral- lel to the furnace-walls, just as is now done in filling the charge-car. The ends of the “spreader,” if built like a hipped roof, would secure proper feeding of the front and back.

Thus, by eliminating the charge-car, and with it the neces- sity for powerful hoisting-machinery, with its expensive repairs and operating-costs, we may greatly simplify the problem of mechanical feeding, and open the way for the adoption of suc- cessful automatic feeding in many existing plants where it is now considered impracticable.

Mechanical Feeding Of Silver-Lead Blast-Furnaces. 395

XYL General Conclusions.

In this Ijrief review of the subject, the following points should be brought out in strong relief :

1. Upon the mechanical character of the furnace-charges, and the manner in which the coarse and fine are disposed in the smelting-column, depend to a great extent the best results in lead-smelting. The efficient utilization of fuel and blast, the close adjustment of slag-composition, and the most perfect maintenance of uniform smelting-conditions must be preceded by the eftective regulation of this factor.

2. Since variations in the feeding are not susceptible of pre- cise measurement, as are the other factors in the blast-furnace process, our only safe means of regulation is to reduce the feeding to a constant. This must be done by establishing a system of feeding from which the uncertain human element is eliminated as much as possible — in other words, a system of mechanical or automatic feeding intelligently designed to meet local conditions.

3. In designing such a system, the first point to be decided is the most economical means of transporting the charges to the furnaces, whether in large or small units, by car, barrow or buggy. This once determined, a little study and ingenuity should evolve the simplest means for invariably effecting such a distribution of the charge so delivered as will comply with the requirements of good feeding.

4. Assuming that suitable preliminary preparation has been given to the material, we may briefly summarize these require- ments under two specifications :

Transversely, a classification and disposition of coarse and fine material, such that the resistance to the ascending gases shall be equal at all points of the section ;

Longitudinally, a perfectly even arrangement of these classes parallel to the furnace-walls.

396 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

Notes on Certain Mines in the States of Chihuahua, Sinaloa and Sonora, Mexico.

By -Waltek Harvey Weed, Washington, D, C.

(Mexican Meeting, November, 1901.)

The notes given in this paper, the result of observations made during recent brief professional trips to the northern States of Mexico, are offered as a slight contribution to the geological knowledge of a region little known, but long famous for its rich gold- and silver-mines. are not detailed geological studies, but they contain, I believe, the salient facts.

The following districts were visited: 1. Santa Eulalia (silver- lead) ; 2. Parral (silver-lead) ; 3. Las Vigas (copper) ; 4. Jimenez (copper); 5. Guadalupe y Oalvo (gold); 6. La Cumbre (gold); 7. Palmarito (silver); 8. Cananea (copper); 9. Sierra Pinitos (gold); 10. Sierra Azul (gold).

1. The Santa Eulalia Silver-Lead Deposits.

Seventeen miles SE. of Chihuahua is the mining district of Santa Eulalia, to which that city owes its origin and long pros- perity. Discovered in 1703, this district has been, and still is, one of the great silver-lead producers of the world. For 86 years after its discovery, the total output upon which the crown tax was paid amounted to $112,000,000. Worked until within the last 20 years by the most primitive methods, without ma- chinery of any kind, the deposits continued to yield a vast treasure of silver; at present the yearly tonnage far exceeds that of former times.

A broad-gauge road runs from Chihuahua up the valley of a small creek to the village of Santa Eulalia, which is situated within the borders of the mountains of that name. A few miles out of Chihuahua a narrow-gauge railway, owned by the Chihuahua Mining Co., branches off to the mines. This road ascends a smooth but steeply-rising plain to the base of the mountains, and winds about the slopes until the mines are

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 397

reached. The same company owns extensive reduction-works 3 miles from Chihuahua; hut in 1900 the ore from all the mines was shipped to the custom smelters.

The principal mines have been operated for the past decade by Americans, and are fully equipped with modern hoists and engines, and all the accessories of a first-class plant.

The Santa Eulalia district embraces about 5 sq. miles of rugged, mountainous, but not very high, country, forming part of a NE.-SW. range, separating the Conchos and Toyoba valleys.

Geology.

The 3Iesa Central near Chihuahua, consists of folded lime- stones covered and largely concealed by dacitic rocks, mostly cemented volcanic ejectments covering granitic intrusions. The hills rising above the plain are mainly of the dacitic tuffs. The Santa Eulalia range is said by J. P. Kimball, who described the district in 1870, to be composed of folded Cretaceous limestones, the ore-deposits being in a local dome-shaped uplift, now deeply trenched by numerous narrow gorges radial to the slopes. The age of these rocks, determined by Kimball from the fossils he collected, is confirmed by similar evidence gathered by myself. The limestones are massively bedded, and form steep slopes and abrupt cliffs comparable to those of the Carboniferous Mountain limestones ’’ of the Rocky Mountain region. The deeply eroded and hilly surface of these rocks is overlain by a mantle of dacitic tuff, filling the old gorges and hollows, and completely obliterating the old topography except where it has been bared by later erosion. This dacitic rock, called Gantera by Kimball, from its local name as a building stone in Chihua- hua, is clearly shown by its field-relations, and by the micro- scopic study of thin sections, to be a volcanic breccia. It is mentioned in a paper on the Sierra Mojada mines, SB. of Santa Eulalia, by Mr. Malcolmson, who notes the similarity of the formations at both places. According to him, the breccia is 1800 ft. thick at the latter place (present volume, p. 107).

The presence of feldspar crystals and limestone fragments is very common in breccias formed of the rock-fragments and ash-showers ejected by volcanoes, and either swept down by

Am. Jour. ScL 2d series, vol. xlviii. (1869), 379.

398 Mmes In Chihuahua, Sinaloa And Sonora, Mexico.

rains or moving as mud flows down the slopes and filling the hollows. Where the volcanic vent has broken up through limestone, the fragments of limestone torn off by the outbreak (and rounded, perhaps, by frequent falling back into the crater and consequent attrition) are finally ejected, mixed with lava fragments, by more violent outbursts. Such feldspar frag- ments and crystals are usual constituents of most volcanic breccias.

Character of the Ores.

The ores consist mainly of lead carbonate (cerussite) with nucleal masses of galena. Eich bonanzas of chloride and sul- phides of silver, and (more rarely) of embolite and iodyrite, have been found. All the ore-deposits occur in the limestone, and are similar, in many respects, to those of the Sierra Mo- jada; but hitherto, so far as I have been able to learn, no valu- able contact-deposits have been discovered. At the Santo Domingo mine, Kimball has described* a vertical fissure or feeder, and the outcrops of other but barren fissures may be seen nearby. This Santo Domingo fissure appears to have been the feeder or pipe for the solutions making the greater ore-bodies which are found along the bedding-planes of the limestone, and are, to a lesser degree, controlled by the joint- ing of the rocks. The main ore-bodies consist of loosely- textured cerussite, resulting from the alteration of galena, of which residual masses are frequent.

Santo Domingo.

This is the most famous mine of the district. The ore-body is an almost ideal example of the metamorphic replacement of limestone. The limestone rocks are well-bedded, and contain occasional fossils, several inches across,! with chert-balls and concretions, commonly arranged along planes nearly parallel to the bedding. The ore shows the fossils and chert-bands in their original and undisturbed position, corresponding closely to those of the unreplaced parts of the limestone having the same structure that are seen in the walls. The upper and lower limits of the deposit are unusually regular for deposits of this

Am. Jour. ScL, 2d Ser,, vol. xlix. (1870), p. 165.

t Especially Ostrea carinata Lam., which is characteristic of the Washita divi- sion of the Comanche Group of the Lower Cretaceous.

Mines In Chihuahua, Sinaloa And Sonoba, Mexico. 399

Mild, and in places are plainly seen to be determined by strati- fication-planes. Such planes were observed to be the surfaces of layers of more earthy or less easily replaceable lime-rock. The side-boundaries of the deposit present in places all the pitted and pot-hole structure which I have frequently ob- served to be characteristic of such replacement deposits. While there is sometimes a very abrupt change from ore to limestone, with no intermediate products, there is often a thin shell of iron oxide and silica; and stringers of such material lead from one ore-body to another. The ore is also abruptly lim- ited at times by joint-planes. Boulders of unreplaeed lime- stone occur in the ore ; but as a whole the limestone is not shattered, and, where it is broken, this is the result of move- ment since the vein has been worked. Open caves occur, but,, in the cases observed, are due to the later circulation of waters that changed the ore from galena to cerussite. A slight second- ary enrichment by these waters produced the rich sulphides,, chlorides and iodides of silver found on the walls of the caves. The old workings were sparingly timbered ; and spaces large enough to hold the Chihuahua cathedral are mentioned by Kimball. By reason of a disastrous cave, which took place a few years ago, these old workings are now inaccessible.

2. The Pabral Mines.

Santa Barbara,

The old camp of Santa Barbara, 8 miles from Parral, is reached by a branch of the Mexican Central railroad. In November, 1900, this line had been completed, but no trains were yet run- ning, and the town was reached by a drive over the low, rolling hills near Parral, and across an open, black valley-bottom to the mouth of the gulch in which the town is situated. Santa Barbara offered a fine example of a mineral district just being extensively opened by strong corporations. The old town, at one time the capital of the State, lies close under the moun- tains and just within the foothills, which separate it from the beautiful broad meadows of the Santiago ranch. The mines were as yet undeveloped; the only previous work having been the gophering,' characteristic of all Mexican properties, which had resulted in irregular openings seldom more than 50 to 75 VOL. XXXII.-— 24

400 Mines In Chihuahua, Sinaloa And Sonoea, Mexico.

ft. deep, extended by cuts or drifts to strike richer portions of the veins. The expenditure of much money in developing the mines for a regular production, and in erecting reduction-mills, warrants the expectation of a large output hereafter. There is a striking contrast between the squalid adobe buildings of the town and the modern machinery and newly-laid railroad- tracks of the new enterprises. Several old Mexican adobe furnaces still exist; and in the center of the valley a slag-dump, said to carry over 40 oz. of silver per ton, forms a valuable asset of one of the mining companies.

The rocks in which the veins occur are indurated gray shales, the ready splitting of which along bedding-lines has caused them to be called slates. They carry little, if any, interbedded quartzite, and no limestone was observed. The rocks are folded, but in general dip W., towards the mountains.

The veins show rough brownish outcrops, forming walls rising several feet above the general surface, but seldom continuous for any considerable distance. The veins are clearly true fissures with irregular rolHng w'alls and contain much crushed shale. The vein-quartz, cementing the frag- ments and forming breccia, shows marked banding and crus- tification. Fluorite and stilbite were observed at the Prim- rose property, at the lower end of the valley, but were not seen in the big veins of the Moetezuma Co. bear the town, dikes of rhyolite cut the shales. A large one was observed on the crest of the ridge north of the town ; another comes down the lower ridge which encloses the valley, and appears on the southern slopes, where its high and brown outcrop resembles those of the two veins seen east of it. The largest dike appears back of the Arroya de Vaca, where it is crossed by another dike showing- as a big reef near the Alfreina mine. The fact that the ledge, varying from 15 to 20 ft. in width, of the Mina de Agua is called “ small ” by the superintendent of the Mocte- zuma company, indicates the great size of the veins cutting the slopes at the head of the Arroya de Vaca. These veins are said to be from 50 to 100 ft. in width. The veins are all traceable for long distances, certainly for a mile or more, and the Mina de Agua vein shows a large outcrop 15 or 20 ft. high (a so-called blow-out of quartz), which is most prominent where two veins cross one another. The ores consist of galena,

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 401

'with a little pyrite, and some zinc in a quartz gangue. In general the veins follow a north and south direction, crossing parallel to the porphyry dike already mentioned. This dike is certainly faulted at the Canada Yaca and another fault was observed near the railroad track. Whether these faults throw the veins as well as the porphyry dikes could not be ascertained. To one fresh from the mines of Montana, the ores appear to be base and the values rather low ; but the zinc is largely elimi- nated in milling, and by reason of the cheap labor of Mexico and the favorable conditions existing at the smelters, the proper- ties yield great profits.

The Guggenheim Co. owns a 60-ton mill, just below the old town of Santa Barbara, on the Gapia ledge, supposedly the same as the Alfreina, The ores from the Palo Blanco and the Tecolotes mines are treated in this mill, the product of the latter property being transported more than f m. by a tramway. This is the mine for which $700,000 is reported to have been paid when the vein was practically undeveloped, save* by open- cut and gopher ’’ holes of the Mexicans.

The Kansas City Smelting & Kefining Co., operating as the Moctezuma Mining & Milling Co., owns two important parallel ledges outcropping at the base of the slopes north of the valley, a little below the town. These veins were recently purchased for $110,000, and the rapid development of the district is shown by the fact that for years the property had been offered for sale and found no bidders at $10,000 Mexican money. In Novem- ber, 1900, when I visited the property, the ground was being graded for a new 250-ton mill and an extensive mining-plant. The ore of these veins consists of galena with pyrite and zinc- blende in quartz. The average composition is: Lead, 7.5; zinc; 6.5 ; copper, 0.27 ; iron, 5.0; lime, 8.0, and silica, 50.0 per cent. ; silver, 6 oz., and gold, $1.40 per ton.

The ore occurs in defined pay-streaks and shoots in white quartz. The quartz shows a banding due to a linear arrange- ment of grains of the metallic sulphides, and sometimes (though rarely) a crustification, with quartz-lined vug-lines, or drusy cavities lined with calcite. The vein is encased in dark-gray slates, supposed to be Cretaceous, which dip SW. 20® to 30®, and fragments of which occur in the vein-filling. The vein appears to have been formed by the filling of open fissures ;

402 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

the dull amorplions-looking conchoidal-fracturing quartz of re- placement-deposits not being abundant nor conspicuous. The vein is about 20 ft. wide, averaging, it is said, 10 ft. of ore. It dips at first 85 W. ; changes to nearly vertical between 100 and 200 ft. in depth, and to an east dip below that.

8. The Las Vigas Copper-Mines.

These mines are about m. IST. of the Conchos river and 70 m. NE. of Chihuahua, the nearest town being Coyame, a vil- lage some 40 m. from Presidio del Horte. The mines are at present remote from a railroad, though the survey-line of the Chihuahua & Pacific passes near them.

The country between the Eio Grande and Chihuahua, a part of the Mesa Central shows numerous narrow isolated moun- tain ranges with intervening pocket-valleys or wide expanses of undulating plain. The flora reflects the aridity of the climate ; yucca sotol mesquite and other arid-land plants being the only vegetation. The ranges consist of folded limestones usually in defined anticlinal folds. These rocks occasionally show also in the plains, but are more commonly concealed by soil or debris. Occasionally the mountains are capped or flanked by masses of dacitic porphyry, rarely massive, com- monly tufaceous, and showing a rude bedding such as charac- terizes the deposits of fragmental ejectamenta from volcanoes. So far as known from the evidence of the fossils actually seen, the limestones are Cretaceous and the tuflfe of later age.

The copper-veins occur in the 8W. foot-slopes of a mountain ridge composed of steeply dipping, massively bedded limestones. The veins are impregnated sandstone strata, forming part of a continuous series of Cretaceous rocks, several thousand feet thick. The beds are on edge (Pig. 1), dipping very steeply, and are well exposed, so that a good section could be easily obtained. Between the base of the limestone mountain range on the east and the ore-bearing strata there is a belt of shale carrying fos- sils. Specimens from this bed were determined by Mr. R. T. Hill to be of Comanche, ie., Lower Cretaceous age. The sandstones above this shale belt are pure quartzose rocks that alternate with soft argillaceous shales and rarely with lime- stone ; but a mile to the north the sandstones are replaced by limestones, the beds of each rock showing in their imbrication-

Mines In Chihuahua, Sinaloa And Sonoea, Mexico. 403

and transition-forms that when they were formed the sea lay to the north.

Three definite ore-seams occur (Fig. 2). Though called veins, they are really beds of sandstone and shale from 4 to 7 ft. wide and coursing impregnated with copper carbonates, oxides

and sulphides. In addition to the three main ore-carriers, there are several cross-fractures and veins which fault the beds and carry little bunches of copper-ore in calcite gangue. The vein- walls ’’ are sharply defined by shale ; but bands of shale in- cluded ill the vein are mineralized. There is little true gangue mineral, so far as observed ; the silica being merely that of the original sandstone.

A mixture of 18 samples of ore and gangue from a large number of cuts across the vein gave: Silica, 74.4; iron, 8.5; lime, 2.0; copper, 5.2 per cent.: gold, 0.6, and silver, 1.45 oz. per ton.

The outcrops of the veins usually show some green staining or malachite in a laminated sandstone reef. The surface-ores consist mainly of malachite, but at a depth of 35 to 50 ft.

glance-ore ” is encountered — a black sandstone in which the quartz grains are coated and cemented by rather earthy-looking copper sulphide. It is impossible to say whether any replace- ment of the quartz has taken place ; but the ore carries from 20 to 30 per cent, of copper. That it will pass into chalcopyrite in depth is indicated by occasional specks of that mineral in it.

Origin of Veins , — These ore-bearing strata are impregnated because the rocks were extremely porous. Hot springs existed nearby and formed deposits of tufa; and there may be some ge- netic connection between this and the copper-seams, though it ap- pears to me more probable that the springs are of very recent ori- gin. The fault-veins of gypsum, calcite and copper that cross the main ore-beds are clearly of later age. They cannot be, ae was at first believed, the feeders for the main veins, carrying the mineral-bearing solutions out into the porous beds crossed by the fault, for the gangue of the two sets of veins is essentially different; moreover, the ‘ore-veins are, if anything, poorer near these cross-fractures, and maintain high values far from them which would negative the hypothesis mentioned. These faults throw the strata from 8 to 30 ft. to the west, i.e,, on the north side of the fault.

404 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

The main veins (Figs. 3, 4 and 5) consist of sheeted or frac- tured sandstone, with malachite, azurite, and more rarely cuprite films, along the fractures. The ore fades into the sandstone. The shale belts between the sandstone layers of the vein carry much ore in films and nodules. Though there is little apparent brecciation of the rocks, and no slicken- sides or clay selvages, it is evident from the occurrence of the ore along the fractures of the vein-fissures that there has been some movement and shattering of the rocks. Commonly the veins show a plating or sheeting of the sandstone. Below the influence of surface-waters, at a depth of 42 ft., the vein car- ries glance. It is here crossed by flat fractures — mere films, partly of gypsum and partly of ealcspar, which occur 5 to 7 ft. apart vertically and delimit the ore ; that is, they show that the glance is the result of descending waters. The interrup- tion caused by such films is only temporary; for rich ores occur below, but the sandrock immediately below each fracture is relatively lean. The vein (Figs. 3 and 6) is sheeted by vertical fractures into slabs J in. to 4 in., but mostly less than 1 in. thick, and the gypsum films of fracture-planes are from J to J in. thick.

4. The Jimenez Copper-Deposits.

These deposits occur a few miles 8W. of Jimenez, where the Parral branch of the Mexican Central railway leaves the main line. The region is part of the Mesa Central which here has an altitude of 4500 ft. The general surface (Fig. 7) is diversi- fied by isolated hills and low mountains, many of which show bedded dark gray limestones. The group of hills in which the copper-deposits occur consist of limestones and shales cut by igneous intrusions. The northern ridges are largely formed of massive rhyolite porphyry; but further south the hills ter- minate in a nearly circular ridge of eroded limestones and shales, which seem to dip away on all sides from a central mass of coarse-grained granite eroded into a basin or amphitheater.

The copper-ores occur in a typical contact-deposit of the Kris- tiania type. As indicated in the accompanying diagram, Fig. 8, the limestones once arched over and covered the granite. The deposit follows the line of contact between limestone and granite, and the contact phenomena vary somewhat. Most frequently the limestone is converted into a massive garnet

Mines In Chihuahua, Sinaloa And Sonoea, Mexico. 405

rock, more rarely (where the original limestone was purer) into coarsely crystalline marhle. At the south end the deposit shows much black hiotite and specular iron (hematite) and magnetite, with some epidote. The outcrop is often a mass of iron-stained quartz, rather hard and dense, and devoid of the honeycomb-structure of gossan. The mine-workings show the ore in irregular bodies (some being 200 ft. thick and twice as long, while others are too small for exploitation) of rudely oval cross-sections, lying in a mass of gypsum, ealeite and silica, between the partly altered limestone and the granite. The granite is altered in successive regular shells or layers, seldom exceeding 6 ft. in thickness, which show varying degrees of oxidation. IsTowhere were ore-bodies found in immediate con- tact with the granite. The irregular limestone walls of the de- posit show plainly the effect of solutions upon the rock, which is pitted, exhibiting on a large scale the etching produced by an acid solution on limestone. Clay walls, slickensides, and other evidences of faulting, are wanting. There is, therefore, no vein-structure. The ore-bodies consist of copper carbonate and oxides, and occur in a gangue of gypsum and calcite with much iron oxide. It appears probable that the original copper and iron sulphides were oxidized, and, reacting with limestone, formed the copper carbonate and iron sulphate now seen.

Such contact copper-deposits, found at or near the contact between granitic rocks and limestones, are of very common occurrence. They may be of the Kristiania type described by Lindgren, like those of Hornitos, near Mapimi, or they may show later fracturing with definite walls and vein structure, .accompanied by enrichment of the deposit. In the former, the ores do not extend into the granite, but appear to be re- placements of the limestones. In both forms there is a very general association of the copper-ore with mosaic rock, of garnet, ealeite, etc., formed by the alteration of impure lime- stones. Within my own experience this association has been very marked. Where the deposit or vein, if vein-structure be present, occurs in garnet rock, it is cupriferous ; where it is in contact with pure limestones or marbles, the lode is composed of pyrite or barren lode matter.

406 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

5. The Guadalupe y Calvo Mines.

The miues at and near Parral and Santa Barbara occur in veins encased in slates or the dacitie tufis and porphyries which overlie or break up through them. West of the Parral dis- trict the Sierra Madre is made up of dacitie and rhyolitic rocks. Later basalts rest, in some places, upon these rocks, but no earlier formations are seen for many leagues. The country is a great x>lateau, deeply incised by the Bio Verde and other streams, whose canon walls show good sections of the succession of tuff beds and breccias with later lava-flows that form the summit of the plateau. Throughout the region trav- ersed this daeite plateau shows no mineral veins ; it is only where erosion has revealed the underlying andesites or the granitic rocks that ore-deposits are seen. The first rocks of this nature are encountered at Turache gorge, but no veins arc seen until the town of Guadalupe y Calvo (Fig. 9) is reached. This settlement is famous in the mining annals of Mexico for its production of gold. The town has a population of 300 or 400 people ; it was at one time the site of a Government mint and had a population of several thousand. Geologically it is on the western slope" of the Sierra Madre, and is one of a number of prosperous mining settlements found along the western margin of the Sierra Madre plateau.

The gold occurs in fissure-veins traversing altered and frac- tured andesitic rocks. These quartz-veins are older than the rhyolitic rocks, and only show where the light-colored chalky- white or pink porphyry tuffs have been removed by ero- sion or mine workings. In part the ores occur in andesitic gangue, but more commonly in true quartz-veins. The amor- phous or crypto-crystalline nature of some of the quartz sug- gests replacement, but comb quartz also occurs. The veins are only exposed on the east side of the creek, the west slope being composed of the dacitie rocks. There are two principal mining properties here, — the Rosario and the Independencia.

The. Rosario Vein.

This vein (Figs. 10, 11 and 14) is one of the largest producing quartz-veins of the world. It varies from 60 ft. to 150 ft. in width, and dips with the hillside so that it forms a great reef

Mines In Chihuahua, Sinaloa And Sonoea, Mexico. 407

fronting tLe valley, and its exposed wall forms a very conspic- uous object (Figs. 12 and 13). It is said to average over 100 ft. across, and where I measured it the thickness was 110 ft. The great open-cut on the vein is 1800 ft. long, 7 ft. deep, and 130 ft. across. Four distinct ore-shoots, separated by low-grade quartz, have been worked. The low-grade ore now forms the enormous dump-heaps seen at the mine; and, despite the fact that the people of the town have largely obtained a living by picking over this dump, it is said to be all good cyaniding ore,

averaging better than |10 per ton.’’ The vein has a 'EW. and SE. course, and dips west. The vein has been worked on one hill to a depth of 430 ft., but a vein of this magnitude will probably not play out at such shallow depths.

The Eosario vein was discovered in October, 1836, by a Tarahumar Indian from bTobogarne, when it was shown to some miners from the Refugio mine, 30 miles south of the Eo- sario. The extraordinary size and richness of the vein caused a rapid influx of miners to the locality, and two months after the discovery there were 2000 people encamped about it. The vein was located by various individuals, but soon passed, by pur* chase and debt of the owners, into the hands of the Ochoa family. In 1836 the Ochoas leased the property, in two parcels, to two companies, organized with English capital, and known as the Gruadalupe Co. and the Zorilla Co. respectively. The Q-uada- lupe Co. worked the western part and the Zorilla the eastern part of the property. These companies were obliged to work under lease, as the former Mexican law did not permit foreign- ers to hold real estate. The terms of these leases are said to be in the mining records, and provided for a royalty of 25 per cent, for four years and $50,000 for eight years ; the lease ex- pired in 1847 or 1848.

Under these companies the vein yielded enormous amounts of gold and silver, so that in October, 1842, a decree was se- cured from the Government permitting the erection of a mint (Fig. 15) at the mine. The records of this mint have been de- stroyed by fire, but custom-house records show that coinage began in July, 1844, and that steam-power was introduced in

The recorded output of the Rosario for the years 1838 t6 1846 is $16,000,000, but owing to the heavy tax upon bullion

408 Mines In Chihijahxja, Sinaloa And Sonora, Mexico.

and the ease with which the tax was evaded, reliable estimates place the total output from the discovery of the vein to the closing clown in 1847 at $40,000,000. The mine was, during these years, worked by the most primitive methods, and the tailings show that a large part of the value ivas lost. The ore was, of course, carried on men’s backs to the surface and then packed on burros to the various crude reduction-works located many miles down the creek, where it was treated in tahonaSj with an overshot water-wheel furnishing the power.

In 1847 large quantities of water were encountered; and, the working expenses being very greatly increased, the English companies attempted to renew the lease for a rental of $30,000' a year, a proposal that was indignantly refused by the owners. Personal differences, added to the refusal, led to the abandon- ment of the property by the English company, who removed to the silver mines of Guanacevi. From this time to 1883 no development work was done. Various Mexican miners robbed the pillars of rich ore left in the workings, gophered ” the rich streaks of ore, and sorted the dump.

In 1883, Judge Flipper, representing the Guadalupe M. and M. Co. organized at Memphis, Tennessee, secured the property under an agreement with the Ochoa family, who reserved a one-fifth interest and were to receive one-fifth of the gross output of the mine. This company operated the mine until 1887, — erecting a ten-stamp mill, and sinking a new shaft, from which a crosscut was driven to the vein and drifts run out from the old shafts. In one year this company shipped $113,000 in gold; but the manager was robbed of nearly $20,000 while taking the bullion across the mountains, and, as a consequence, the property was abandoned by the company in 1887 and re- verted to the Ochoas. At that time the Mexican mining laws required properties to be worked by six men for six months of each year; this the Ochoas failed to do, and in 1889 the prop- erty was denounced by four Americans, who obtained title from the Federal Government. With three Mexican mer- chants, admitted as equal partners, the property was oper- ated and the ore treated in a stamp-mill with pan amalgama- tion. In 1892, operating under lease, two of the partners cleared over $100,000 in 22 months, working on ore from the dump-heap and from the rich pillars left in the workings.

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 409

Meanwhile the ownership of the property passed into the hands of Tibnceo Gareia, and was sold by him, in 1895, to the Eo- sario Mining and Milling Co.

The Independencia,

The Independencia property includes a group of claims situ- ated east of the town of Guadalupe y Oalvo. The claims cover a complexity of veins shown in Fig. 16. The main workings are entered by a tunnel near the mill, and include shafts and drifts on the Independencia ledge. The vein out- crop consists of porous white quartz, which is rusty and drusy in some places. The ledge runs a little north of west, and has been quarried by open-cut and stoping from below. These workings show the vein to be 8 or 10 ft. wide, with a pay streak from 1 to 5 ft. across, showing a well-defined sin- uous wall. The ore consists of white quartz and red jasper- oid carrying pyrites, and rarely free gold. Some of the ore carries high values in silver, but no recognizable silver miner- als were seen, the richest ore showing a black clouding of the quartz. The vein-filling is finely crystalline, and shows none of the coarse texture and comb-structure of a filled fissure, its nature being that of replacement quartz. Where crystalline quartz is seen, it is secondary, and cements fragments of shat- tered original vein-filling. A banded structure is rarely seen, and occasionally the vein-filling shows fragments of an ande- sitic breccia, the rock being altered and of a greenish-yellow color. So far as seen, the vein is nearly vertical. Its surface continuity is interrupted by a patch of rhyolite tuJff, as shown in Fig. 16.

The workings consist of three tunnels with drifts, and expose the vein for a vertical depth of 220 ft.; two winzes of 26 and 30 ft. depth, respectively, prove the vein below the lower tunnel. The following assays show the general character of the ore on the Cuauhtemoc vein: gold, 0.04 oz. to 5 oz. per ton; silver, 3.20 oz. to 167 oz. per ton. An average of 24 assays from the various faces gave : gold, 1.18 oz. per ton; silver, 16.62 oz, per ton. The ore varies in ap- pearance. The pyritic ore is commonly reddish quartz, with veinlets of white and gray quartz. The silver-ore contains finely disseminated galena, with zinc-blende, and occurs in a

410 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

mixture of dark gray, white, and amethystine quartz. Chal- copyrite occurs in minute specks. The rich gold-ore shows dull greenish secondary quartz, often in botryoidal forms, filling cavities ; the primary ore often shows rusty gold, suggesting decomposed telluride ores. It also occurs associated with minute specks of copper pyrites and zinc-blende. The rocks are altered porphyritic andesites.

6. La Cumbre Mines.

West of Guadalupe y Calvo the Sierra Madre region difiers in topography and geology from the region east of the town, where it is a slightly dissected plateau of bedded rhyolite and dacite porphyries. Westward the Sierra plateau is dissected into a maze of mountain ridges and peaks in which the older igneous rocks, the granites, diorites, and the andesites constitute the lower part of the mountains ; the jmunger lavas cap the sum- mits and cover relatively small areas. This region contains many mineral-bearing areas, that of San Jose de Gracia being the best known. Los Angeles, San Fernando and the Trigo silver- mines are a few of the places nearer to La Cumbre. This vil- lage, situated on a mountain-top west of the Bazonopa river, is supported by the Fortuna and Guadalupe mines. The country is extremely rugged, the mountain-tops having an elevation of nearly 8000 ft., the village of 6800 ft., and the river of 3200 ft. above sea-level.

The older rocks are andesites, altered breccias and lava-fiows, baked and recrystallized near the diorite intrusions which cut through them. These diorites are coarsely granular, and in ap- pearance are dark-colored granites. Both diorite and andesite were eroded, at the period when the rhyolite-dacite eruptions be- gan, into a mountainous country as rough as that now seen, so that these recent rocks now covering the summits form the mountain spurs, and are cut into deep canons by the Bazonopa river. Before the rhyolite intrusions occurred the country was extensively fissured, and quartz-veins were formed travers- ing the andesites and granites. These veins are particularly large and well-developed in the Guadalupe and Fortuna prop- erties at La Cumbre ; and though they pass under the rhyolite caps, and their absolute identity is lost, the group of veins of which the Fortuna is a part can be traced for several miles.

Mines In Chihuahua, Sinaloa And Sonora, Mexico, 411

Their course is nearly east and west 70 degrees E. mag.), and the dip is toward the south. The Eortuiia vein shows from 8 to S2 ft. of quartz, hut the hanging- and foot-walls show decomposed rock, and crosscuts show much alteration for many feet on each side of the vein. This alteration has caused the complete disappearance of the dark-colored minerals of the rock whose iron has united with the sulphur of the circulating

Fig. 1.

Open-cut on Las Vigas copper-vein, near Coyarae and Rio Conchos, Chihuahua,

Mexico.

water and formed pyrite, partly in little veins, but mainly as disseminated crystals.

Tlie vein outcrops are well-defined reefs, which usually stand in relief above the slopes. The vein-filling consists of white and blue quartz, with pyrite scattered through it, together with some chaleopyrite and zinc-blende. The capping of oxidized ore is very thin, the sulphides being encountered but a few feet below the surface. Bunches of very rich ore sometimes

412 Mines In Chihuahua, Sinaloa And Sonoea, Mexico

Cretaceous shales. Cretaceous sandstones. Trinity (Cretaceous) Heavily bedded limestones.

Ideal E. and lY. cross-section tlirougli Las Vigas veinSj near Conchos river and Coyame, Chihnaliua, Mexico. Looking north.

Veins in solid black.

Mines In Chihuahua, Sinaloa And Sonoka, Mexico. 413

Fig. 3.

Section of Las Vigas vein in open-cut.

Fig. 4.

L'Armistad - /

Fig. 4. — Section of L’Armistad vein, Las Vigas mines. Consists of sandstone layers, with thin partings of shale, shown by lines in figure. The ore consists of malachite, aziirite and chalcocite in bunches up to 3-in. diameter and films on fractures, and is associated with calcite.

Fig. 5. — Section of Annexas vein. Las Vigas mine ; 26-in. streak ( on left) of hard barren sandstone ; 6-in. black shale (barren). The ore-bed is a sandstone cracked by differential slipping, and the cavities filled by red calc-spar. The ore occurs both in spar and sandstone. Thin shale-bands separate the ore-layers.

414 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

Fig. 6.

Section of Las Vigas vein ; 20- in. streak on left side is unaltered gray sand- stone ; 18'in. streak is a shaly sandstone, fractured and showing films of cop- per-ore in cracks; 29-in. streak is a very shaly sandstone, with ore in fractures shown by black dashes; 36-in. streak is massive sandstone carrying very little ore; 24-in. streak is the main ore-layer, consisting of sandstone impregnated witli copper-ore ( glance ). The richer ore occurs in streaks shown by black lines ; 30-in, band is shale, with films and nodules of ore.

Fig. 7.

Jibosa copper-mine, near Jimenez, Chihuahua. Mine-workings on left and back of house. Quartz outcrop on right of house. Hill of Cretaceous limestone and shale. Foreground of granite.

Mines In Chihuahua, Sinaloa And Sonora, Mexico.

416 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

Fig. 9.

Ouadaliipe y Calvo. Dacitic tuffs in foreground, and forming pinnacle and ridge

in background.

Fig. 10.

Fig. 12 .

Foot-wall streak outcrop of Bosario vein, Guadalupe y Calvo, Ohiliuahuaj

Mexico.

Outcrop of Bosario vein. A. Foot-wall streak. B. Hanging-wall streak.

Fig. 14.

01(1 mint at Guadalupe j Calvo, Ohilmaliua. Outcrop of Eosario vein seen in 1;)a(;kground on left. Dacitic tulfs covering vein on right, and forming plateau on 'whicdi buildings stand.

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 421

Sketch map of part of Northern Sonora, Mexico. The large area blocked out is the Hays Cons. M. & M. Co.’s tract in the Sierra Pinitos ; (he smaller area is in the Sierra Azul. The solid black lines represent the wagon-roads,

422 Mines In Chihuahua, Sinaloa And Sonoha, Mexico.

Ideal cross-section through Eonquillo group of mines, Cananea.

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 42S

Fig. 20.

Capote mine, Gananea mountains, Sonora. Main crest of range in background. Hill back of tents is outcrop of one of the. great veins. Ore-bins of Elisa mine in mountain gap.

Fig. 21.

The blast-furnaces of the Cananea Cons. Copper Co. (Greene) at Ronquillo. The excavation is for the Bessemer plant, now completed, and in operation.

Mines In Chihuahua, Sinaloa And Sonora, Mexico.

Fig. 22.

Pinitos range, Magdalena district, Sonora, Mexico, showing character of topography of eroded dacitic and andesitic rocks. ( Snow-covered ; north, pine-clad slopes. )

Andesite iava flows

426 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

occur, and usually with a green quartz, colored by a mica, whose appearance strongly suggests the Yanadium-mica, roscoe- lite, which, according to Lindgren, is commonly associated with the richest gold-ore of California. This ore and the rosy ore of somewhat lower value often occur as shells encasing nodular masses of zinc-blende.

The character of the quartz, the lack of comb-structure, and the evidence of replacement of fragments of the crushed

Fig. 25.

Espei’anza vein and tunnel, Sierra Azul, Magdalena district, Sonora. Quartz- vein in granite. Foot-wall seen on riglit of tunnel.

granite and andesite, indicate that the vein is largely formed as the result of replacement. The decomposition of the country- rock confirms this, and in the coarse-grained granite the char- acter of the vein is identical with the copper-veins of Butte, Mont., which are typical examples of replacement-veins.

7. Palmarito Mine in Sinaloa.

The western part of Mexico in the Tierra Oaliente of Sinaloa and Sonora is a coastal plain diversified by isolated mountain

Mines In Chihuahtja, Sinaloa And Sonora, Mexico. 427

ranges and groups of hills. The higher parts of this plain show folded slates and sandstones covered by fragmental voh canic accumulations of andesitic tuffs and conglomerates. These rocks are cut by granitic intrusions, while the higher hills and mountainous areas are commonly composed of dacito-rhyolites or rhyolite-porphyries. ISTear the little town of Palmarito, about 30 miles north of Culiaean, and as many miles from the shore of the Gulf of California, there is a sharp crested hill that rises 300 ft. or more above the plain. The hill is covered by angular blocks of reddish rock, and shows a steeply inclined wall as the side of a great reef of silver-bearing porphyry. This reef is a dark, purple-gray porphyry, with rather chalk- like texture. It is clearly a breccia, and the quartz of the reef shows distinctly, by variations of color, the replacement of the angular fragments, as well as their more or less complete de- composition. The ore also shows a conglomeratic structure, in which rings or shells of quartz enclose pebbles of altered porphyry. A study of thin sections of these rocks has been made by my friend Prof. Alexander K Winchell, of the Mon- tana State School of Mines. He finds that the foot-wall is a trachyte, carrying some plagioclase and pyroxene. The main body of the hanging-wall is a quartz-syenite of finely granular texture, showing a little pyroxene. The ore itself is a de- composed trachyte carrying wagnerite, hematite and a little pyroxene ; the more siliceous ore consists of granular quartz carrying the minerals last mentioned.

The ledge is said to be 135 ft. to 150 ft. across. It has an east and west trend, and dips at 30° JST. This ore-bearing reef is underlain by solid blocky porphyry, of different texture and appearance from the ore-bearing breccia. The values occur in pay-streaks of rich ore, and only those carrying silver were worked through the entire thickness of 135 ft. The ore is mostly dry, the silver occurring as silver sulphide and its de- composition products, but there are bunches of lead-ores which are sorted and shipped to Mazatlan. The entire reef is said to average 15 oz. per ton in silver, and is certainly well mineral- ized, though no samples were taken. There is no question but that water will be encountered below the level of the plain, and that the ore will change to a sulphide.

The workings, in December, 1900, consisted of an open

428 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

quarry and of two drifts of 15 to 20 ft., with an upraise of 100 ft. or so on a flat pay-streak. The ore is mined by hand and packed down on the backs of burros to the mill at the foot of the hill. The five-stamp-mill crushes the ore dry, and no screens are used in front of the mortar, the discharge being through a slit 1 in. wide under a board placed where the screen is usually found. The discharge passes over a gently inclined screen, the finest going directly to the roasting-furnace and the screenings back to the stamps. By this simple device 12 tons of ore are crushed each day, although the stamps are small and in bad condition. The ore is dried in a brick reverbera- tory furnace before crushing. The pulp is roasted and then leached with hyposulphite, the silver sulphide filtered through cloth, and the resulting mineral sun-dried and roasted to free it from sulphur before shipment. The ore milled carries 28 to SI oz. of silver per ton, with an extraction of 80 to 85 per cent, as shown by the company’s books. The output is 4700 to 6000 oz. per month, the shipments for sixteen months aggre- gating 125,000 oz. (December, 1900.)

8. The Oananea District.

Within the past two years the Cananea and the Nacosari copper districts of Northern Sonora have been added to the list of great copper producers of the world. In the progress of this work, railways have been built and the districts men- tioned have awakened from almost mediaeval quietude and simplicity to the nervous activity of busy, wide-awake commu- nities. The result has been that there is an active and vigorous search for desirable ore-deposits of every kind, and the great mineral wealth of Sonora has been brought to the attention of the world at large.

The part of Sonora noted in this paper lies near the Inter- national boundary in the vicinity of Nogales, and of Bisbee, Arizona. The grassy plains along the border line have an ele- vation of 4600 ft. above tide, and above these broad llanos the mountains rise abruptly to an elevation of 3000 ft. or more. The region does not present the usual desert aspect common in Arizona and Sonora, as the elevation and geo- graphical position give it a rainfall considerably in excess of that normal to the desert as a whole.

Mines In Ohihuahea 5 Sinaloa And Sonora, Mexico. 429

The accompanying map (Fig. 17) shows the relative position of the three mountain ranges, namely, the Sierra Cananea, Sierra Azul, and Sierra Pinitos, which were visited while the writer was engaged in a professional examination of the cop- per- and gold-mines of those districts.

The predominant rocks of this part of Sonora are volcanic tufts and breccias ejected from vents whose cones are now dis- sected and form the mountain ranges. The volcanic ejecta- menta also cover a large part of the intervening valleys, and have furnished the material for extensive alluvial deposits. Mas- sive igneous rocks occur in all the ranges, underlying the tuffs and cutting through them. The igneous rocks present peculi- arities of composition which show that the region belongs to the Arizona petrographic province. The older rocks are an- desitic and andesitic breccias cut by later massive granitic rocks, and covered by dacitic rocks and tufts.

In a paper on the geology of Sonora, Mr. E. T. Bumble"*" has given formation-names to such volcanic accumulations. While this is warranted where the igneous rocks occur iiiterbedded with fossiliferous strata, it is not, in my opinion, applicable to the rocks seen at ISTogales or in the region southeast of that town, embracing the Pinitos, Azul and Cananea ranges, and the coun- try traversed by the wagon-road. An intimate acquaintance with similar volcanic phenomena in the IJnited States con- vinces me that it is neither safe nor wise to assume similar ages for similar appearing volcanic accumulations when stratigraphic or paleontologic evidences are wanting.

The Cananea Copper-Deposits,

The Cananea deposits are situated in the range of that name, 30 miles south of the International boundary, and about 45 miles southwest of Bisbee, Arizona.

The locality is now accessible by rail from the main line of the Southern Pacific at Deming or Benson, over the El Paso and Southwestern toUaco on the International boundary, where connection is made with the Cananea railroad. This railway traverses an open, well-watered prairie land, the average ele- vation of which is 5000 ft. above sea-level.

Tr(m,i xxix., p, 122 ei seq.

430 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

The mountain range rises abruptly from the broad mem flats, which though apparently level, have a nearly uniform 2 per cent, grade. They are trenched by the streams, whose di- verging branches have cut broad and shallow valleys in the basal mountain slopes and concentrate in trunk channels which are a hundred feet or less below the level of the plain. Near- ing Cananea, the broad and gently sloping plain shows a scat- tered growth of yuccae in a stony or gravelly soil, replaced, as the town is reached, by scrub oak trees.

My observations on the Cananea range were made while riding over the trails to Puertecitos and returning by wagon- road, so no pretension is made to accuracy in the accompany- ing cross-sections (Pigs. 18 and 19), which are given as diagram- matic representation of hasty observations.

The mines are situated on the northern slopes and water- shed of the Cananea range, a group of mountains 6 to 10 miles wide and about 25 miles long, running in a general north- west and southeast direction. The mines are located in the southern half of the range upon a great mineral belt or zone, running with and along the range, from its southern ex- tremity to the deep gap that divides the mountains into two distinct portions. This range consists of the denuded and dis- sected remains of an old volcano. Near the central dividing gap there is a great mass of hornblendic granite occupying the center of the old volcano, forming its core, and encircled by andesitic porphyries of various kinds, and by massive crystal- line rocks of similar composition.

The granite core is seen near Puertecitos, surrounded by massive andesitic and dioritic rocks. The main crests and sum- mits of the range consist of quartzites, hornfels, marble, adinoles, etc., formed from sandstones, shales and limestones, and cut by andesites and quartz porphyries. The character of these rocks and their relation one to the other show the region to have been one of intense volcanic activity. The bedded andesitic tuffs and breccias, forming the lower foothills and mesas to the east of the range, are the ejected rocks and andesitic ash of the old volcano, whose core is now dissected and carved into a mountain range without a suggestion of its old form. The out- lying fragmental rocks are well exposed, but the complex of altered sediments and massive igneous rock, forming the moan-

Mines In Chihuahua, Sinaloa And Sonoha, Mexico. 431

tains, presents few good natural exposures of the rocks, though there are many outcropping ledges of the metal-bearing vein- stiifts. The wagon-roads and the narrow-gauge railway almost encircle the range, and give excellent exposures of the rocks, which are supplemented by the sections in the mine openings. It is evident, from the character of these rocks and their rela- tion one to the other, that a volcano broke out in a mountainous mass of Carboniferous limestones and shales, which were cov- ered up by volcanic ashes and lava flows, and later sufficiently eroded to expose the deeper rocks in the mountain area.

Distrihiction of the Rocks . — Across the range west and notth- of the Capote group of mines the quartz porphyry forms the mountain slopes, its white, shelly dihris being very con- spicuous.

From the Capote group an excellent wagon-road has been cut over the range, and along the western slopes for four or more miles, to the sawmill at the head of the gulch. Along this road the porphyry gives place northward to greenish gar- net-epidote belonging to the altered limestone series, and cut by diabasic dikes. These rocks prevail as far as the sawmill and probably from the divide between this gulch and Elenita,. though good exposures are lacking. It is not until the dump of the Elenita is reached that fairly fresh rock is seen. The rocks at the Elenita consist of altered limestone, olivine and basalt.

Between the Elenita mine and the Puertecitos group, the most northerly group of the company, a wagon-road has been blasted out of the side hill, exposing fine sections of hornstone, adinoles, impure marbles, and other rocks of original sedimen- tary origin, altered by contact metamorphism. These rocks show distinct bedding-planes, adjacent beds often being of strongly contrasting color and composition. They are cut by dikes of white aplitic granite and the strata dip north. The outcrops and road-cuttings show much copper, mostly as green stains.

The Puertecitos mines show great outcrops of garnetiferous rock carrying copper carbonates, oxide, and the native metal. That this is derived from veins of chalcopyrite ore is shown by the working tunnel of the Cananea mine, whore a vein 30 ft. wide consists of an upturned stratum of altered impure lime- voL. xxxii.— 25

432 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

stone, heavily charged with chalcopyrite and zinc-blende. This bed occurs beneath a layer of white marble. The entire sec- tion seen along the road is one typical of contact metamorpMsm in which the pare limestones have changed to marble, and the impure argillaceous limestones and the shales to mixtures of garnet, epidote-calcite and other contact minerals.

Trom Puertecitos to Eonquillo the wagon-road follows the creek gorge for several miles, and then crosses the low hilly country at the foot of the mountains. The upper gorge, near the mines, is cut in a gray-brown dioritic porphyry, which is exposed in the mine-workings adjacent to the ore-body. A canon extends for a mile or so through this rock, and then follows the contact between the diorite porphyry and a normal granite, the latter rock forming a considerable area to the northwest. Farther down, the gorge leaves the contact, and is cut in ande- sitic porphyry, whose large white feldspar crystals are very con- spicuous. This forms the lower mountain slopes until covered by the tuffs and breccias that form the foot-slopes and flanking mesas. These tufis are usually of a purple or gray color, clip 15 degrees to 20 degrees eastward, and vary in texture from coarse conglomerates to fine sandstones. Certain beds, as, for example, the gray tuff seen overlying the purple tuff quarried at the smelter, are traceable for several miles.

Age of the Rocks . — I did not see any unaltered limestones in the Cananea mountains. Fossils, if present originally, must have been entirely obliterated in the crystallization and forma- tion of new minerals which has resulted from very pronounced contact metamorphism. That this series of sediments aggre- gated several thousand feet in thickness is certain, as the bed- ding-planes are preserved by the marked differences in min- eralogical composition. Fossiliferous limestones of Carbonif- erous age are seen at ISTaco Junction, 40 miles northeast of the Cananea, and it is believed that in part, at least, the rocks at the mines are of that age.

The Ore-Deposits . — The ore-bodies of the Cananea consist of great masses of chalcopyrite (and its secondary products, — glance, malachite, cuprite, native copper, etc.), occurring in the altered sedimentary rocks, and in veins or fractures in which secondary concentration has occurred. The contact-bodies are not, however, confined to the immediate proximity of the

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 433

eruptive mass, and are therefore not of the true Kristiania type. The rocks consist of series of beds dipping east about 60 degrees, the original bedding of the sediments being clearly recognizable, since original differences in composition have produced different mineral composition. This is especially well shown on the west side of the mountains, along the wagon- road from Capote to the sawmill, and also along the road from Puertecitos to the Elenita mine.

There is a belt of these contact metamorphic rocks extend- ing from the Cobre Grrande on the southeast to the Pnerte- citos on the north, a distance of about 8 m. These rocks do not all contain ore, but it occurs localized along favor- able beds. This mineralization is especially great at the south- east end of the range. As the outcrops have been weathered and leached, they now form great ridges of gossan. The Democrata is the most easterly, and between this and the Capote vein there is the Veta Grande, a big iron vein, and a large number of small veins in the limestone series, while in the porphyry and quartzite to the west the Oversight and Ca- pote mines are found (Pig. 19).

The Capote ore-body consists of a mass of crushed porphyry, altered to a white, clayey material, and carrying scarf-like masses, strings and bunches of soft black copper-glance, with some residual pyrite. The southwest and southeast parts of the ore-body consist of a shattered mass of quartzite, whose joints, fissures and interstices are filled by ore. This crushed material has all the characters of an interfault mass, but no boundary fault-slips were observed ; and where the boundary of the ore was seen, the transition to solid and lean quartzite or pyritized porphyry was very abrupt. The evidences that the glance is of secondary origin are clear and conclusive, both in the faces seen in the mine and in thin sections of the ore, where the dis- seminated pyrite grains (of an altered porphyry, forming a dike in the quartzite of the ore-body) are partly replaced by glance. The ore-body is very large, measuring 275 ft. by 135 ft. on the 100-foot level, and 165 ft. by 100 ft. on the 200-foot level. The ore is soft, as much of the porphyry is rotted, and heavy timbers in square sets are used, and the space filled with waste, as in the Butte practice. Much of the ore will run 15 per cent, as mined. In the rock-cuts along the narrow-gauge

434 Mines In Chihuahua, Sinaloa And Sonoka, Mexico.

railway the true nature of several of the lesser veins is recogniz- able as altered strata impregnated with chalcopyrite, with small amounts of galena and blende.

In the Cananea district the vein outcrops are the most prom- inent features of the landscape in the vicinity of the mines now being worked. The enormous masses of iron-ore, the gossan caps of the veins, form high ridges of rough brown rock, traceable for long distances across relatively smooth slopes. Where the streams have cut across these vein outcrops, the deep and narrow gorges show excellent sections of the veins and the enclosing rocks. It is in such places that the earliest mining was done. The drifts and tunnels driven in the veins disclosed large masses of native copper, carbonates and oxide ores, the existence of which made the region well known throughout Sonora for the last half-century. As the gossan cap is penetrated, the ore beneath is found to consist of pyrite and chalcopyrite, mixed with much earthy and soft black copper-glance.

The ores of the diiferent mines vary considerably in char- acter and value. In general, it may be stated that the ore from the group of mines nearest the smelter, embracing all the bonanza mines of to-day, is quite siliceous, occurring largely in a quartzite gangue or an altered quartz porphyry. The ore from the Puertecitos group is less siliceous, the gangue con- sisting largely of calcite and garnet. The intermediate mine, the Elisa, has a chalcopyrite ore that is siliceous, but carries, I was told, good values of gold and silver. In the Veta Grande vein large bodies of low-grade ore were encountered carrying native copper in a very siliceous gangue. This ore will aver- age about 2.15 per cent, copper, but also carries about 0.38 oz. gold per ton. It is this ore which can be so easily and ad- vantageously concentrated ; tests showing, I was told, a saving of nearly 92 per cent., and the concentrates having 22 per cent, copper and 3.6 oz. gold per ton.

The company now working these mines owns almost the entire district (Eig. 20), and, as a consequence, the development work has been planned and carried out on a broad scale in order to develop the whole tract to the best advantage. In addition to a 42-mile standard-gauge railway-line, built to connect the camp with the El Paso and Southwestern railroad, the com-

Mines In Chihuahua, Sinaloa And Sonora, Mexico. 435

paiiy has built 11 m. of narrow-gauge track, which runs to the mouth of the crosscut working-tunnels driven to tap each ore- body. Well-graded roads, cut out of the solid rock, extend to the sawmill and to the remoter prospects. Pipe-lines convey the water from surface-springs in the heart of the mountains to the city which has sprung up about the smelter, or the newer city on the lower mesa. With depth, the mines will un- doubtedly yield water, as the Capote now yields a sujDply large enough for concentrator and smelter.

The smelting-plant (Pig. 21) embraces six Mitchell Economic Hot-Blast Furnaces, treating over 1000 tons of raw ore per day, and the resulting matte is bessemerized on the spot. The pro- duction for 1901 was 34,437,131 lbs., and for the first four months of 1902 was 11,758,072 lbs. of copper and 114,426 oz. of silver.

9. The Sierra Pinitos Mines.

Situation and Topogra'phy,

The Sierra Pinitos (Fig. 23) is a range beginning a few miles south of ITogales and extending southward for about 25 miles. It is bounded on the west by the valley of the Rio Alisos (or San Ignacio), a tributary of the Magdalena, and on the east by the valleys of the Santa Cruz and the Cocospera. The peaks of the range attain an altitude of 7400 ft. above sea-level, or 4000 ft. above the valleys. The central and southern portions of the range and its highest peaks are formed of andesitic rocks, while the rougher northern peaks are formed of tuffs and brec- cias dipping steeply away from the center of the range (the dip lessening on the outer flanks of the old volcano), and rest- ing on the granites as seen near Nogales and the Santa Cruz river. The lower country is heavily grassed, and the uplands and arroyas contain magnificent specimens of the various ever- green oaks common in Mexican mountains. The mountains are heavily wooded, oaks prevailing below 5000 ft. and on southern slopes up to the summits, while the high northern ex- posures are covered by pine (P. ponderosa). The topography of the range is clearly that of the normal erosion of a moun- tain mass (Fig. 22). The drainage is dendritic, and the main peaks lie east of the water-shed.

Geology , — The country between the Alisos river and the

436 Mneb In Chihuahua, Sinaloa And Sonora, Mexico.

mountains consists of a series of grassy mesas with deep gulches between. In Casita canon and along the streams the rocks exposed are well-jointed, bedded tufaceous dacites of varying color and texture, capped by stream-gravels. The ridges rise gradually toward the mountains, merging into foot- hills. The walls of the lateral caxlons show light-gray dacites, but the slopes and terrace summits are mostly covered by large and somewhat angular debris. The foothills are composed of the same andesitic rocks and dacite porphyries that form the main peak of the range. The central portion of the range consists of andesitic breccias and tufts capped by lava flows forming the higher summits. These tufts vary greatly in ap- pearance, color and texture. Away from the influences of later intrusions of massive andesites and from the mineral veins, the rocks are of earthy brown to green color and resemble the tufi*s of the ‘‘Fossil forests’ of the Yellowstone Park. They consist of large and small fragments of different varieties of andesite held in a matrix of fine particles of dust of the same rock. These rocks are capped by massive red, gray or purple andesites forming the high peaks (Fig. 23) and main divide of the range, while the lesser ridges, particularly near the ore-de- posits, consist of a quartz porphyry of distinctly dacitic habit.

Where the streams have cut deeply into the range they have exposed an andesite-porphyry showing white feldspars span- gled through a very dark iron-gray ground-mass. This rock varies somewhat in texture and appearance, hut is clearly part of a single large intrusion. It has cut through the tuffs in places, but commonly is overlain by them, and has produced a marked contact metamorphism in the latter near the contact. The tuffs seen near Hays’s camp are well indurated, as dense as quartzites, lack bedding, and contain fragments of andesite, quartzite, and other altered sedimentary rocks, from 2 ft. across down to the size of a pin-head, none of which are now seen in situ in the neighborhood. The rock is so well indurated that the fragments do not weather out in relief. The massive feldspar-’’ or andesite-porphyry is cut by dikelets of white aplite. The creek gorges show excellent sections of the ande- site, and show it to extend eastward and down the canons to the granite contact, and always at a lower line than the brec- cias. The granite forms a distinct area of low foothill country

Mines In Chihuahua Sinaloa And Sonora, Mexico. 437

whose sandy slopes and groups of rounded monoliths are typi- cal of granitic rocks the world over. The rock is a normal, coarse granite, cut by occasional dikes of white aplite and by veins of white quartz. The contact with andesite indicates that the granite is the more recent rock. It forms an oval area of perhaps 2 by 5 miles, whose boundaries are easily distin- guished because the coarsely crystalline rock weathers so much more readily than the harder andesites.

Throughout the southern part of the range, which is the min- eral-bearing district, the common rock seen on all the ridges and slopes is a pale gray, lavender or white quartz porphyry. The rock is platy, and has the peculiar mottled look of phono- lite. As shown by microscopic examination it is a dacite, but not a normal type. Partial analyses showed silica 74.53, soda 3.87 and potash 4.99 per cent, in the rock from the ridge near the Emole mine. The dacite hanging-wall of the Oro Blanco vein gave silica 73.79, soda 2.2 and potash 5.70 per cent. The exact relation of this rock to the andesitic tuff* is obscured by the abundance of which covers the slopes. Atone or two places there is conclusive evidence that it is intrusive ; but its general occurrence bn the upper part of the ridge indicates that it may be, in part, a series of lava-flows or a single great sheet of massive rock cut through by the streams.

The Ore-Deposits . — The ore-deposits of the Pinitos all occur in the southern part of the range. They consist of quartz- veins carrying gold, and of a wholly different class carrying tetrahedrite and its decomposition-products, with high silver values. Several of the deposits occur on the contact between the common andesitic rock and the intrusive masses of dacite; ]>ut the most common is a fissure-vein with a vein-filling of shattered and altered andesite with long, thin lenses of white or rusty quartz (Pig. 24). In the silver-veins the vein is variable in width, with bunches of ore. The extremely fine jointing of the andesite facilitated the passage of mineralizing waters in many small channels, rather than in one trunk-channel, so that the fissure is compound. It is believed that some of the veins in the andesite are nettings of thin streaks of quartz which inter- sect and form bunches of ore. In general there is a very thin talcy parting along the vein-wall, but the country-rock is al- tered outside of these walls. Ho workable veins have been

438 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

found in tte granite, but they occur alike in massive andesite- porphyry, in the fragmental andesite and the pale-colored da- cites.

The veins all have a general N. or NNW. course and are of two sets, one with vertical dip, the other with dip of 40° to 20° E. The gold-veins vary from 5 ft. to 7 ft. in thickness, and carry low values in the altered and pyritized country- rock and high values in the quartz-streaks. The ledges commonly consist of material softer than the enclosing rocks, hence do not show outcrops, save where the quartz-lenses are particularly large and not covered by the dacite dihris. There is no doubt that the ore will pass into rather coarsely crystal- lized pyrite in depth, as indicated by pyrite cavities and by nucleal boulders of sulphide ore.

10. Tee Sierra Azul Mining District.

Hiiuation and Topography,

The Sierra Azul lies between the Cananea and the Pinitos ranges (Fig. 17). It is drained by the Oocospera river, whose broad valley lies west of the mountains. Terraced mesas stretch out from the mountains westward, trenched by drainage-ways sunk 50 to 200 ft. below the mesa. The mountains consist of a group of peaks without definite order, but having a general north and south trend, and a width of 6 to 8 miles. Beginning in low hills on the north, the peaks rise higher and higher, culmi- nating in a dark wooded summit having an altitude of about 8200 ft. above tide. The drainage is, in the main, radial, but has been influenced by the relative hardness of the different rocks, so that meanders and loops now exist. The canon wells and slopes are relatively steep, but the high slopes and summits are rounded and smooth, varying, however, with the nature of the rocks. Where granite prevails the contours are gentle, and the slopes, grassy or dotted with groups of oaks, rarely show the grouping of boulders common in granite regions. Good rock exposures are seen in all the creek basins. The streams have a rapid fall, and, though all but devoid of water most of the year, are a succession of rapids and falls in the rainy period, so that the channel is cleared of debris and the rocks smoothly polished. There is a marked contrast in scenery between the

Mines In Chihuahua, Sinaloa And Sonoea, Mexico. 439

grassy slopes of tlie granite and the jagged pinnacles and cliffs of the indurated andesitic breccia areas.

Geology , — The Sierra Azul consists of a central core of granite, exposed in several separate areas, hut believed to he part of one central batholithic mass. Andesitic breccias compose the greater part of the range, as they do in the Pinitos. These rocks are mainly coarse breccias and conglomerates, quite like those of the volcanic mountains of the Yellowstone. Year the granite contact these are well baked, and so indurated that the paste and fragments present equal resistance to weathering or stream erosion, and when broken they fracture without regard to the included masses. The fragments vary up to a foot in size, and include rocks of varying color, appearance and habit. The paste consists of fine particles of the same rocks as the frag- ments. These breccias occur quite close to the granite, but no actual contact was seen ; either there is a lack of exposure or massive andesite intervenes. The breccia is baked by the gran- ite, and, so far as observed, does not contain granite fragments, gneiss, or sedimentary rocks. The massive andesite varies from a porphyritic rock with large tabular feldspars to a dense rock devoid of phenocrysts.

The granite is a coarsely granular hornblende-mica rock of uniform character. It is cut by dikelets of white or pink aplite, and by larger dikes, 10 to 20 feet across, of a dense white rock, a felsite with the texture and appearance of porcelain ; these dikes also cut the andesitic rocks. The contacts between the granite and andesite did not aftbrd satisfactory evidence of the relative age of the two rocks, as no actual inclusions of one rock in the other were seen. The andesite at the contact is very dense, while the granite is of normal grain, though so seamed and fractured as to make this uncertain. As slivers of andesite project into the granite, and as the andesites are thor- oughly baked and metamorphosed, it seems probable that the granite is younger in age, and has been intruded beneath a mass of andesitic breccias.

Ore-Bejposits , — The ore-deposits of the Sierra Azul occur as gold-bearing quartz-veins in granite and silver-copper veins in andesite. The gold-veins have a general YW.-SE. course and dip north at angles of 10 to 40 degrees. The ore seen at all but one working is oxidized, carries fine free gold both in white

440 Mines In Chihuahua, Sinaloa And Sonora, Mexico.

quaitz and iiilioiieycomb-structured siliceous limonite. The vein- filling consists of crushed granite, with clay streaks and quartz lenses. A footwall streak often shows much manganese, and defines the vein from the hard and blocky granite forming the footwall. This footwall rock shows considerable iron-staining for 3 in. to 6 in. from the vein, but this fades out in a foot or two. A typical cross-section is given in Pig. 25.

The Oro Bonito vein is encased in a white or pinkish granu- lar, aplite granite, sheeted parallel to the vein, and jointed at right angles to it. The quartz which constitutes the pay-ore occurs in lenses a few inches to a couple of feet or more in thickness, separated by crushed vein-matter of altered granite,, now a clayey, rotten, reddish or buff material. As these quartz, streaks are not persistent, though where one ends the overlap- pizig end of another is usually found, long outcrops do not occur.

At the Esperanza mine the vein passes westward into a bar- ren fissure filled with a breccia of granite and aplite fragments.. This appears to be a brecciated aplite dike. The occurrence of the quartz lenses is shown in Pigs. 26 and 27. Several of the veins are faulted with downthrows to the north. The unaltered vein-matter contains galena and some copper sulphide.

The silver-veins are found in both granite and andesite,, though all but one of the veins examined occur in andesite. The veins have regular and well-defined talcy hanging-walls and a rolling footwall. The vein-filling consists of sheared and crushed andesite impregnated with gray copper and a little firalena. The Gran Portuna vein follows the contact between a

o

white andesite porphyry and a dike of chocolate-colored horn- blendic andesite-porphyry, both cutting the breccias, and the filling includes streaks of dense quartz and crushed and de- composed andesite with clay films and streaks. The rock of the vein-filling is a tough clay-like mass, devoid in part of ore or quartz, save where secondary carbonates of copper form films in the network of fine cracks traversing both vein-stuff* and walls.

The Porvenir vein occurs in a granite containing abundant bunches and aggregates of tourmaline an inch or two across.

The ore-deposit appears to be an attrition breccia, formed by a fault traversing a zone of altered tourmalinized aplitic

Mikes Ix Chihuahua, Sinaloa And Sonora, Mexico. 441

granite. The vein averages 5 ft. across, and consists of altered and crushed granite and clay (sericite), in which there are boulders of ore from a few inches up to a foot or more in diam- eter. These boulders consist of a kernel of black tourmaline, surrounded by a shell, an inch or two thick, of copper carbonate

Fig. 26.

Granite

Red clay streak V 4 Quartz Q'solid “comby”

Clay 2 2 en toray Quartz 6"

7:1 V-

Esperanza vein, Sierra Azul.

p Granite 14"deconnposed iron stained

y.' sericitized with porphyntic appearance

streaked with clay films

Granite

and silicate. These relations are shown in Fig. 28. The out- crop of the vein consists of a mass of black tourmaline 10 ft. across. Assay of the material free from copper showed 40 cents gold and 1 oz. silver per ton. The bleached sericitized granite forming the vein-filling carries the same amount of

Fig. 27.

Longitudinal section of quartz-streak, Esperanza tunnel, Sierra Azul.

gold and oz. of silver per ton. The shell of copper-ore car- ries 21 per cent, copper, 11 oz. silver per ton, and 60 cents gold per ton. The vein is believed to ho of pneumatolytic origin.

442 Mines In Chihuahua, Sinaloa And Sonoha, Mexico.

Summary.

The ore-deposits described herein embrace several distinct types. The gold tpes occur in distinct fissure-veins in andes- itic and granitic rocks. From information derived from vari- ous mining engineers and from specimens of the ores, the gold- veins of San Jose de Gracia, and, in general, of the gold-belt northward to the border line, are confined to these andesitic rocks and the granite intrusions in them. The veins are

Fig. 28.

Porvenir Yein.

1. Massive and dense, sliglitly altered tourmaline-bearing aplit e-granite.

2. Breccia of white granite fragments and clay. An attrition, or fault, breccia.

3. Yellow altered soft granite carrying boulders of tourmaline with shells of ore.

4. Crushed granite.

younger than the dacites and rhyolites that compose the Sierra Madre Plateau.

The Santa Eulalia lead-deposits are metasomatic replace- ments of limestones, partly along fractures and mainly along bedding-planes. They show siliceous concretions and fossils in the ore in the undisturbed original position in which they were in the limestone before replacement.

The copper-deposits are of four classes :

1. In impregnations of upturned porous sandstone strata, re- sembling the deposits of Oorocoro, Bolivia.*

Lock, “ Economic Mining,” p. 416, London, 1896.’

MINES IN CHIHUAHUAj SINALOA AND SONORA, MEXICO. 443

2. Contact-deposits between a granite intrnsioii and lime- stones, a very common type in Mexico. These deposits are not veins, but are due to mineralized vapors and gases given off by the igneous magma reacting upon the limestone walls. They are often characterized by ganietiferous rocks with specular iron. The ores are primarily chalcopyrite, altered to carbon- ates with the production of gypsum. They occur in large and small masses, and are of irregular and uncertain distribution.

3. The copper-deposits of the Cananea type closely resemble the last. They are tilted beds of sedimentary rock, altered and impregnated with chalcopyrite, and sparingly with galena and blende by contact metamorphic agencies.

4. The copper-deposits of the Porvenir vein, Sierra Azul, Sonora, are closely allied to the contact metamorphic deposits of the two preceding classes, but formed, like the well-known tin-veins of Cornwall, by pneumatolytic action (mineralizing vapors above the critical point and pressure, given off by igneous magma), and deposited in fissures in the consolidated portions of such magma.

The Palmarito silver-deposits are of a typo common in Mexico, the vein consisting of a breccia of altered rock, with walls of massive, unbroken rock. The fragments are cemented by quartz carrying silver sulphides and occasionally masses of galena.

The Santa Barbara and Parral deposits are true fissure-veins cutting shales (slates) and the porphyries that break through or overlie them. The presence of fluorite indicates the pres- ence of gases from igneous magmas in the vein-forming waters. (Pneumato-hydatogenetic deposits.)

444 Sibbea Madkb Ocoipental Of Chihuahua And Sinaloa.

Notes on a Section Across the Sierra Madre Occidental of Chihuahua and Sinaloa, Mexico.

By Walter Harvey Weed, Washington, D. C.

(Hexican Meeting, November, 1901.)

The Republic of Mexico is traversed bj many mountain ranges, and presents a great diversity of climates, soils and geographical features, yet its grander geographic provinces are few and peculiarly well defined. The Glulf plain, the Cen- tral plateau, the Sierra Madre, and the lowlaud or Tierra Cali- ente of the western coast are the main features of the geogra- phy of the Republic, and in the northern half these provinces are particularly well defined. The Sierra Madre separates the Republic into eastern and western parts, and from the City of Mexico north to the Texas line presents au almost impassable barrier to east and west travel. On the north, the first wagon- road pass from east to west is at El Paso del Norte, the site of the Texan city of El Paso. Southward for many hundreds of miles the Sierra Madre, traversed hy well-worn trails, over which all travel from the west coast to the interior must pass, is a stupendous barrier to social and commercial intercourse.

The Sierra Madre is commonly described as a range or con- geries of mountain ranges. In fact, it is, in Chihuahua at least, a great plateau, fringed by mountains on the east, trenched by deep canons in its center, and bordered by a wild and rugged complex of mountains carved out of the plateau on the west.

Professional duties took me across this region from Parral westward to the Gulf of California vyx Guadalupe y Calvo. As it includes some of the great ore-deposits of Mexico, and its geological features have never, so far as I am aware, been described, I have prepared a diagrammatic section made from my observations on a horseback trip across the Sierra, and added such notes as seem to he of general interest.

Sierka Madee Occidental Oe Chihuahua And Sinaloa. 445

The Central Plateau Region.

Prom the Rio Grande at Presidio del Norte westward to Chihuahua the central plateau presents a broad expanse of rolling, arid tableland, with grass and Spanish bayonet, sotol yucca and cacti Detached and usually serrated mountain ranges rise abruptly from this open country. The rocks are mainly limestones, blue, gray or white, and commonly devoid of fossils, though certain beds abound in them. These fossils, wherever seen, were of Cretaceous age; but older rocks have been found by other observers. The rocks are folded in domes as well as the more common synclinal and anticlinal folds, and in places intrusive masses of rhyolite-porphyry and extrusive rhyolite-tufls occur. Many of the ranges seen along the line of the Mexican Central consist of such rocks, and the silver-mines at Santa Eulalia are in Cretaceous limestones, eroded and partly covered by rhyolite-tufls. Near Chihuahua the lime- stones are concealed largely by rhyolite-tuft's of varying texture and color. Southward along the Mexican Central railroad the isolated ranges contain intrusive masses of granite and other coarsely granular rocks, which, breaking through the limestones, arc often characterized by contact-deposits of copper-ores ; as, for example, those at Jimenez and Mapimi.

The branch lino of the Mexican Central Railroad running to Parral and Santa Barbara traverses a plain rising gently west- ward, and terminating in the hills about Parral, which are out- liers of the main Sierra Madre, and are composed of dacite and rhyolite resting upon steeply dipping argillaceous shales, so hard as to be commonly called slates.

The Sierra Madre.

Sierra Madre is a common name on the maps of Mexico, but the only region properly so designated forms the central ridge or backbone of the Republic. It is fittingly named; for it is indeed the mother Sierra, since a great mountain-region has been carved out of it. The elevation west of Parral is about 7000 feet, the summit of the plateau rising gradually to 10,600 feet near the Continental divide, and gradually falling to about 6800 feet, whore the plateau breaks into the bordering mass of mountains. As already observed, the Sierra Madre is a pla-

446 Sierra Mabrb Occidental Oe Chihuahua And Sinaloa.

teau, cut by canons and dissected along its borders. It is built up of successive flows of eruptive lavas, liglit-colored dacitic and rhyolitic porphyries, the result of great volcanic outbursts and accompanying fissure-eruptions, such as formed the great rhyolitic fields of the western United States. On the east these rocks rest directly upon the folded slates, but on the west upon andesitic and rarely upon granitic rocks. Ore-deposits occur in the fragmental igneous rocks (rhyolites and tuff*s) along the eastern border and in similar rocks west of the Sierra ; but, so far as my observation goes, the rhyolitic flows of the Sierra Madre proper are later than the ore-deposits, and cover and conceal them. It is only where the underlying andesitic rocks have been revealed by erosion that the mines have been found. In general, these andesitic rocks are of direct volcanic origin, forming an irregular plateau comparable to the range east of the Yellowstone Park, and deeply dissected before the period of the rhyolite eruptions.

Itinerary.

Outfitting at Parra], I took the trail leading direct from the city to the town of G-uadalupe y Calvo. A narrow-gauge rail- road runs some 20 miles west of Parral ; and at the time of my visit, in December, 1900, was being rapidly pushed west of the summit of the mountains. This road will carry great quantities of flrewood and mill-material to Parral. Before it was built, all the firewood of the city was packed in on burros. On the first day of my trip at least 1600 burros were passed. A stick of wood as large as one’s wrist is worth a cent at Par- ral; and as this wood has all been packed 20 miles from the mountains, it may readily be seen that the railroad will find considerable traffic in firewood alone.

The country for 5 miles west of Parral shows rough hills having outcrops of dacite and dacite-tuffs, and intermediate grass-land dotted with bushes. Beyond this broken country there are smooth grass-lands with fine pasture, while the bottom-lands of the river are planted in coni. Distinct out- crops of rock are rare ; and the underlying material could only be observed in railroad cuts, where tuff's showed and con- glomerates and breccias were also observed. West of this fine pasture-land the foothills show smooth slopes covered with

Sierua Madre Occidental Of Chihuahua And Sinaloa. 447

biishes of scrubby oak, which increase in size as the trail ascends. The first foothills are low, rounding, and show smooth slopes ; the rocks are slates whose ready weathering has pro- duced this smooth surface. The slates are much folded, how- ever, and westward, near the pass through the mountains, are covered with rhyolite-tufls and lava-flows, which form bold pil- lars, clifis and peaks. As the altitude increases, pine-trees are observed, and the oaks are no longer mere bushes, but measure from 6 to 15 in. in diameter and 10 to 20 ft. in height. The ac- companying diagrammatic section, drawn en route, shows the general relations of the rocks. .At the close of each day’s jour- ney the observed facts were added to the diagram, which there- fore represents both my observations and my interpretation of them.

The country between Parral and the crest of the mountains is underlain by dark gray shales and slates. These I'ocks are folded, but seem to have a general easterly dip. At Parral they are covered by dacitic breccias and tuffs, which form the prominent hills near the city, and are cut by the veins of silver- lead ores which support the industry of that busy town. These, rocks all show a widespread decomposition.

The dacitic rocks occurring at Parral are described by Ordo- fiez* as dark green to dull green rocks, containing scattered crystals of transparent feldspar, together with hornblende, dark green to the naked eye, and lamellce of dark green mica. The magma is in part microfelsitic and in part microlitic, with dis- seminated particles of yellowish-green hornblende, which gives to the rock its color, and the crystals of hornblende are in part decomposed, and altered, either centrally or peripherally, to calcite, chlorite, or, sometimes, epidote.

J udging by the phenocrysts which it sometimes contains, this rock bears some similarity to the felso-dacites of propylitic ap- pearance, of Kosenbusch, and may correspond in part to the da- cites, as well as to the porphyrites, of Fouque and Levy, which are likewise analogous to some of the propylites described by Zirkol from the Virginia range of llevada. Here, these rocks some- times have a lighter color and a more marked porphyritic ap- pearance by reason of an abundance of disseminated feldspar

BoUtin dd Insiituto Geologico de Ilexico, Mem. 4, 5 and G (1897), 259.

Vol. Xxxix. — 26

448 Sierra Mabre Occidental Oe Chihuahua And Sinaloa.

crystals. There also may be observed with the naked eye, and ill variable quantity, grains of pyrite disseminated in the paste.

Four miles west of Parral an eroded rhyolite lava-fiow was observed, the rock being distinctly vesicular in places, and holding abundant small lithophyses. In the mountains the rocks are mainly tuffs grading into coarse breccias. In general they are dense in texture, and but rarely show phenocrysts of saiiidiiie and quartz. The rocks mainly weather in pale shades of brown, sometimes reddish, often gray. The new railroad-grade, which is largely a rockcut in the steep slopes, shows excellent exposures; this fresher rock being commonly chalk-white, some- times brick-red. The trail and railroad grade both follow up a clear headwater branch of the Parral river to the low gap in the mountains north of Santa Barbara. Prom the summit, a chain of bold peaks is seen to the south, while less lofty and rugged heights continue the line northward, and the mountain slopes extend west to a broad plateau.

From the divide westward the trail crosses a basalt flow from 100 to 300 ft. thick, which rests upon the eroded surface of rhyo- lite. These rocks form an open, grassy basin and rough slopes of very low gradient, bearing scattered oaks. The mesa, stand- ing above the rhyolite-slopes on the west side of the basaltic area, shows that the basalt has suffered some erosion. The basalt itself shows abundant feldspar phenocrysts a half-inch across, with large yellow olivines. The rock varies in texture, but is commonly vesicular and often slaggy in form.

After leaving the basalt, the trail descends a very gentle slope over flows of rhyolite, exhibited as a succession of cliffs with intervening terraces, to a depression in the plateau known as the Arroyo Hondo, The country is exactly like the plateau of the Yellowstone Park, save for the oak-groves which dot the hillsides, and look much like the apple-orchards of Hew England. The rocks are both massive and tufaceous, and ap- pear to be typical rhyolites, showing a ground-mass thickly crowded with sanidine, quartz and biotite. The Arroyo Hondo is a deep trench in the plateau, containing the only water for many miles about. West of this arroyo the country is clearly a dissected rhyolite plateau, with rolling surface and an average relief of about 200 ft., embracing a succession of open meadows alternating with low oak-covered hills. Occasionally low ledges

SIERRA MADRE OCCIDENTxlL OF CHIHUAHUA AND SINALOA. 449

of rhyolite are seen on the more rugged slopes with occasional bossy outcrops bearing pine-trees which greatly resemble the "Mong-leaf pine of the northern Rocky Mountains {Finns Ponderosa), A small species of two-leafed ’’ pine, resembling the P. Murrayana or “ lodge-pole pine ’’ of Montana, is also seen.

On this rhyolite plateau, water is relatively scarce; the few streams being shallow, and showing, in the dry season, merely isolated pools of water. Westward, the plateau breaks off sud- denly toward the great north and south trench of the Mvarra river. The trail gradually descends the incised front of the plateau which has been cut back by a branch of the Nivarra. The view from the summit, looking west, shows a succession of terraces with what appears to be a high, rough range be- yond, having a nearly continuous crest. The aspect is that of a typical rhyolite plateau region. The rocks are mainly mas- sive lavas on the upper part of the plateau, and rest upon tufaceous material in well-defined beds, and composed of vari- ous colored fragments in a very pale gray, or light buft* matrix. The Mvarra river cuts in the plateau a narrow gulch, 1000 ft. deep, with practically no valley. At the point where the trail crosses it, the river is but a few miles above its junction with the Eiparra river, and a branch of the trail follows down the picturesque canon to the main stream. The trail which we took, however, ascends the steep slopes and crosses a narrow divide about 800 ft. above the stream-level, between the two rivers. The section exposed along the slopes shows that the lower rocks are all dacites and dacitic breccias and conglomerates, the fragments being often but 2 ft. in diameter.

The valley of the Riparra is about 0.5 to 0.75 mile wide, and contains occasional ranches and well-cultivated fields of corn. The bottom is dry and arid, except where cultivated and irri- gated. The trail turns abruptly up the valley and follows its eastern margin for about 3 miles, passing the hot springs, which are used for irrigation. The water, at a temperature not ex- ceeding 120° R., oozes from caves in the volcanic tuffs, the water-course and the pool being lined with bright green algcB.

According to my barometer-readings, the Riparra valley has an altitude of 5700 ft. West of it the trail ascends to a bi'oad, open, grassy terrace, corresponding in altitude to the

450 Sieera Madrb Occidental Of Chihuahua And Sinaloa.

well-marked terrace on the eastern side, the front having an elevation of about 800 ft. above the valley, and the rear being about 400 ft. higher. Looking up the stream, the bedded dacite lava-flows are seen to dip X., or down-stream, while near by and north of the trail the flows have an eastward dip which probably accounts for the slope of the terrace. This terrace is open and grassy, save where it has been cultivated in extensive corn tields by the Indians of the valley. To the westward, a depression in the terrace is filled with basalt. Across this terrace, which is about 3 miles wide, the trail as- cends extremely steep slopes of light-colored dacite porphyries in successive flows. The typical rock is a dense lavender-col- ored dacite with scanty crystals, and chalk-white to tufaceous in appearance. From the summit (about 8500 ft. high), the trail follows a succession of deeply-incised gulches to the RosariO' spring; the rocks being chalk-white volcanic tuffs which weather readily. West of the spring, the slopes ascend gradu- ally to the summit of the plateau, 9200 ft. high. It is evident that the supposed mountains seen west of the Riparra river are in reality merely the rugged and incised front of the plateau. The trail crosses the arroyo an intervening region cut in banded rhyolites, often plated in structure, and follows up a little gulch to another (9200 ft.) summit which seems to mark the general average of the plateau top and then descends about 100 ft. to a basalt-covered area, timbered with fine pines and showing park-like areas containing shallow lakes or lagunas. The largest of these, known as the Laguna Grande is a hand- some body of water, about of a mile wide. Several dry basins, observed in the basalt, are believed to mark hollows in the original lava-flow. The summits crossed between the Ri- parra river and the lagunas showed the first good pine-trees seen ; and the pine-growth reaches its culmination on the basalt area near the lagunas. Here the trees average perhaps 2 ft. in diameter, and many were seen 3 and 4 ft. through at the butt and over 100 ft. high. The oaks also are larger, — often 2 ft. through, straight in growth, and 30 to 40 ft. high. Madronas and cedars also occur.

The basalt itself is both vesicular and dense in texture, and varies in color from dark steel-gray to chocolate-browm,. and shows occasionally glassy feldspars and much iddingsite.

Sierea Mabre Occidental Of Chihuahua And Sinaloa, 451

The basalt-area is an ideally beantifal timber-country. The pines are tall and straight, grow relatively far apart, and the intervening space is covered by a fine growth of grass. There are no hills worthy of the name, the average elevation being about 20 or 30 ft. above the laguna meadows. This ideal country ends at the Arroyo de Cuevo Blanco there the basalt terminates abruptly, thinning out over the dacite; the latter rock forming great clifis and huge angular masses, which are not plated, but show great conchoidal fractures, and the lava- flow being exposed in a cliff along both sides of the arroyo and undercut by a small stream, making the cave that gives the place its name. The trail, which passes westward along the grassy bottom of the creek, is much traveled. At the time of my visit, numerous pack-outfits, loaded with oranges from the western slopes of the Sierra Madre, or with merchandise for the interior, together wuth herds of goats going to Parral, were passed at short intervals.

West of the Arroyo de Cuevo Blanco the trail ascends steep slopes made by the incision of the headwaters of the stream in the main summit of the dacite plateau. The average elevation of the Laguna Grande country is 9200 ft, and, according to barometer-measurement, the summit of the plateau west of the urroyo has the same altitude. The country is a typical dacite plateau dissected by numerous trenches running IST. and 8., or approximately transverse to the trail. Westward, the elevation decreases gradually toward the Bio Verde. The deepest de- pression passed is the Arroyo Mnerta. Here the rocks are bright-red rhyolites, underlying ledges of gray rhyolite brec- cias, which form the lower part of some 600 ft. of white rhyo- lite-tuffs. There is a sharp ledge between the Arroyo Muerta and the walls of the canon of the Bio Verde. This canon shows broken walls with numerous projecting points, as the river has a tortuous course and the rocks are soft and readily yield to erosion. The gorge is about 2000 ft. deep, though the actual walls are much less high, as the slope is quite gradual, and it is only near the river that cliffs are seen. The barometer-read- ing at the river-crossing was 7300 ft. Looking westward across the gorge, the front of the plateau is seen as a black, straight profile, having no resemblance to the mountain-region, although it is commonly called the summit of the Sierra Madre.

452 SIERRA MAERE OCCII>B:sTAL OF CHIHUAHUA AND SINALOA.

The rocks exposed in the gorge are sheeted, the lavender-col- ored dacites of the lower 500 ft. being overlain by chalk-white tuffs, which extend to the summit. The trail followed up a tributary gulch running at nearly right angles to the canon and showing walls, 200 ft. high, of rhyolite, eroded in very striking picturesque forms. The resemblance to the Yellow- stone Park country is also noted in this little gulch, the rock- outcrops, the spruce and fir timber on the walls, and the willow and the red-bud brush in the stream-bottom furnishing the exact counterparts of similar places in the northern Rocky mountains. The creek also, like the streams in the Yellow- stone Park, heads in a shallow depression, on a summit which shows an elevation, according to the barometer, of 9350 ft., while the main summit of the plateau is 150 ft. higher. The rocks encountered appear to be normal Yellowstone rhyolites, varying from an extreme density to a rough texture. Quite rarely, black rhyolite-glass, having the structure of pearlite, is seen. West of the divide the rocks are denser, and often have the structure of porcelain. They occasionally contain spheru- lites, which are commonly silicified.

Westward, the trail follows for about 3 miles a beautiful wil- low park, and then crosses rugged hills and intervening gulches to the meadows on the eastern side of the deep depression of Turache creek. It does not descend abruptly into this valley, but follows a stream running SW., cutting through the rhyo- lite cap, and exposing a bedded basic andesitic breccia. These rocks, indeed, extend to the very top of the plateau ; hut they have evidently been deeply eroded ; since, at numerous places along the stream followed by the trail, rhyolitic or dacitio tuffs are seen resting on the breccias. The altitude of the plateau where the trail begins to descend is 8800 ft., and that of the Turache valley is 6800 ft. The Turache creek joins the real Rio Verde 40 m. Jfrom the point where the trail crosses.

Beyond Turache the trail ascends the steep slopes of the valley to the summit of the rhyolite plateau. The rocks are massive, with a platy structure. The basalt breccias do not appear west of the range, although the trail follows a steep little gulch, and the rocks are well exposed on the cliffs above. Beyond the Turache ranch and the Guadalupe y Calvo the ele- vation reaches about 9500 ft. The steep descent to Guadalupe

SIEKRA MABEE OCCIDENTAL OF CniHUAHLA AND SINALOA. 458

y Cal VO shows good exposures of rhyolite-tuffs of the same character as the rock seen at the town ; and the basaltic rocks are not exposed until the town itself is reached.

Guadalupe y Calvo is picturesquely situated in a deep basin surrounded by the steep slopes of the Sierra Madre plateau. This basin is about 1 mile wide and 2 miles long, but there is no bottom-land, the creek cutting a little gorge through the slop- ing shallow basin-bottom, extending back to the steep slopes. The glaring colors of the place are in marked contrast to the plateau country about it ; for the removal of timber and wash- ing away of soil has bared the pink, white, and gray rocks. Seen from the east, the indurated rhyolite-tuffs or breccias form massive exposures, looking like granite, and weathering in picturesque crags, clifts, etc., which extend continuously along the southern side of the stream past the town. This rock is in turn covered by from 100 to 300 ft. of earthy rhyo- lite-tuffs, resting upon the unevenly eroded rhyolite, and so soft that they weather readily and form smooth slopes with no rock-exposures. Ko veins or mines are seen on the south side of the town, where these rocks prevail. On the north, the rhyolite-tuffs are seen to rest upon and cover the veins, — a con- clusive evidence that they are more recent than the ore-depos- its. Where the rhyolites have been removed by erosion the underlying andesitic rocks are exposed, forming the dull brown slopes seen about the mines. It is evident from the occurrence of this rhyolite that the andesitic rocks were carved pnto a hilly country, as rugged as that seen to-day, which was com- pletely covered and buried beneath later eruptions of rhyolite as lava-flows and ash-showers. It is evident that these hills sloped SW., down to a lowland; for the andesites do not show south of the town, while the tuffs are piled up to great heights on every side of it. These andesites are bedded, and show, near the Rosario mine, a dip of 80° B., and a strike of E". 70° W. They are mainly of fragmental origin, are well indu- rated, much altered, and appear to have suffered from contact- metamorphism. They show varying tints, but are thought to be part of a complex similar to that which is seen forming the foundation of the plateau E. of Turache. They are netted with fractures and veinlets of quartz, as well as cut by the great veins of the Rosario, and the group of veins on which the In- dependencia mine is located.

454 SIERRA MAERE OCCIBEKTAL OF CHIHUAHUA AKD SI-ALOil.

The town is situated in a little basin cut by the headwaters of Dolores creek in the rhyolite, near the western border of the Sierra Madre plateau. A few miles W. a very rugged, moun- tainous country begins, the mountains being carved out of the plateau, the summit-level of which their summits approxi- mately reach.

The andesitic rocks are traversed, especially at the E. end of the basin, by a large number of large and small quartz veins. The diagram (Fig. 11)''' shows the larger veins only; the intervening areas present small minute quartz-streaks travers- ing the rocks. The second diagram (Fig. 16), t showing the Eosario outcrop, represents an area where many of the smaller stringers have probably united in the big Rosario vein. The shattered condition of the andesite is well seen, however, in the exposures along the trail cut in the cliffs below the old mine.

A few hours’ travel west of G-uadalupe y Calvo, the great Sierra Madre plateau suddenly ends, and the sea of mountains formed by the erosion of the western border of the plateau begins. This fringe of mountains, perhaps 15 miles wide, is bordered by rolling foothill country, which gives place to the broad, flat strip of coastal plain extending to the Gulf of Cal- ifornia. Isolated mountain ranges occur, however, in both hill and plain tracts, but they trend IST. and S., are relatively low, and are not eroded parts of the plateau. The mountain border E. of the Sierra Madre is narrow, and more like a rim about the table-land. On the contrary, the western mountain tract is generally lower than the plateau, is made up of lateral spurs and ridges running transverse to its border, and, in genei’al, shows clearly the branching system due to the dissection of the plateau by the streams. From the Guadalupe y Calvo west- ward, the andesitic rocks are exposed along the trail to Dolores, but are capped by the rhyolite forming the higher ground. The plateau shows very moderate dissection northward and westward to Baborigame ; but the direct trail to La Cumbre goes westward; and as one approaches the plateau edge a V-shaped gap shows a wide stretch of lower mountainous country. The

Kg. 11 of “Notes on Certain Mines in the States of Chihuahua, Sinaloa and Sonora/’ by W. H. Weed, page 417 of present volume, t Kg. 16 of op. ciU, page 420.

Sibrea Mabre Occibektal Of Chihuahua Anb Sinaloa. 455

descent is very abrupt. Tire trail winds about from side to side of a lateral ridge, and descends fully 1000 ft. in each, mile trav- eled.

At tills point the west slope of the plateau is composed of well- banded, highly-indurated basaltic tuffs and breccias, dipping down-stream, 20 to W., and cajiped with rhyolite flows, not only on the plateau, but on varying lower elevations in the ridge to the west. Evidently the Sierra Madre is made up of a base- ment of these andesitic rocks, eroded and covered by rhyolite, and the flows have filled up an extremely rugged country. This mountainous tract is the dissected border of the plateau, and bears the same relation to it that the bad-land areas do to the flat mesas from which they are derived. These mountains, therefore, show the substructure of the former plateau, and, as their evidence accords well with that afforded by the Turache valley and at Guadalupe y Calvo, it is presumed that the ande- sites were eroded into very mountainous tracts before the rhyo- lite eruptions began.

Compared with this western border, in which cuts of 3000 to 6000 ft. prevail, the Eio Yerde canon is shallow. The summit of the plateau is probably 9500 ft. high east, and not less than 7000 ft. high west of Guadalupe. The altitude of the orange- ranches of Eio Domingo is 2900 ft. less. The Rio Domingo has cut down through the andesite breccias to slaty rocks, of which I unfortunately have now no specimens. I do not feel confident that they are not metamorphosed igneous rocks; no quartzite or limestone being observed. The latter rocks are seen only in the main valley of the Eio Domingo; the moun- tains and small valleys show only the andesites and rhyolite- porphyry caps. Along a branch of the Bazonopa (a branch of the Sinaloa), the river-drift shows boulders of granite and va- rious andesitic rocks, as well as rhyolite.

The abrupt descent from the plateau summit to the Eio Do- mingo valley is accompanied by a corresponding change in the vegetation. Where the narrow ravines widen and a little strip of alluvium occurs, fields of sugar-cane are found, and orange groves appear. The rank vegetation of the tropics is, however, absent and only suggested along the stream bottoms.

The Bazonopa river, a large branch of the Sinaloa, cuts a horseshoe canon, some 60 miles long, through the heart of the

456 Sierra Madre Occidental Of Chihuahua And Sinaloa.

western mountain tract, furnishing excellent sections of the rocks. In general, true rhyolitic rocks prevail, forming moun- tain-summits and canon-walls. These rocks are plainly seen to consist of nearly horizontal flows, in part of massive lavas, but chiefly of indurated tuffs and ashes, the ejecta of old volcanoes, filling deep hollows in the andesitic porphyry. Intrusive masses of granite and diorite also occur, and are shown by included fragments of andesite and their jagged contents to be later in age than the andesites, though older than the tuffs. At La Ciimbre, a little mining town nestling in a hol- low on the summit of the mountains and sustained by the product of the G-uadalupe and Fortuna mines, an opportunity was afforded for a detailed study of the structure and nature of the rocks.

The river gorge is in part cut through all the three varieties of rocks mentioned. The oldest rocks — the andesites — are well bedded, have a prevalent dark-gray or purplish-red color, and vary from coarse breccias, with fragments a foot or more across, to fine tuffs and jasper-like rocks. They appear to be horizontally bedded, and are capped by dacitic rocks. These andesitic rocks form the slope where erosion has removed the rhyolite. They are cut by a granite intrusion on the river- bank; by a larger mass on the summit, at the village of La Cumbre ; and by a third mass of granite, three miles farther west. In each instance the andesite tuffs have been somewhat baked and metamorphosed by the heat and vapors of the gran- ite intrusion, so that recrystallization masks the original nature of the andesite porphyry, and gives it a more uniform, almost diabasic texture. Massive andesite-porphyry is also seen below the Guadalupe mine ; it has distinct phenocrysts of black augite and white plagioclase, and occurs in blocky masses, forming large, approximately rectangular outcrops, devoid of prominent shooting or jointing.

The granitic rock is a quartz-monzonite, deeply disintegrated, as might be expected in the tropics, so that fresh samples can only be obtained from mine-workings or places where streams keep a fresh surface exposed. In general the rock is deeply decayed, and disintegration boulders occur, mostly small, and showing a pitted or horizontal surface. It apparently shades into a dark basic rock, carrying hornblende crystals an inch

Sieeka Madre Occidental Oe Chihuahua And Sinaloa. 457

long. Tlie rock is cut by veinlets, and closely resembles the quartz-moiizonite of Butte, Montana.

The rhyolitic rocks appear identical with the dacitic, seen farther east. They occur at all elevations, and show plainly that a rugged mountainous district, even more deeply cut than that now existing, was filled up and leveled to a plateau by immense flows of rhyolites and dacitie rocks. The basal beds of this series, as seen near the mine, are at least 1000 ft. thick, and consist of well-bedded tuffs, carrying fragments of rhyo- lite and boulders of andesite, with distinct alteration-crusts, — one pebble, 4 by 5 in. in size, having an alteration-crust 1 in. thick. The rich gold-veins of La Cumbre are well-defined quartz ledges, cutting andesite and granite, but covered and concealed by the rhyolo-dacitic rocks. In this district the moun- tain slopes are very steep, averaging nearly 30°, Bazonopa river having an elevation of but 2900 ft., while the mountain- tops vary from 6500 to 7000 ft. West of La Cumbre the route pursued to the coast follows down the deep cut of the Arroyo Naranja the walls of which show bedded andesites, cut by acidic granitic intrusions, which give place farther west to im- pure, thinly-bedded limestones and shales, with an average dip- of 20° HW., and covered by dark-green schistose slates. Gran- itic intrusions are frequent, and have indurated the slates and altered them to hornstone. The granites, though poorly ex- posed, are recognizable by the soil. Limestones, which occur in beds from 2 to 6 ft. thick-, were carefully searched for, at first without success. They are overlain by basic andesitic breccias, which are also cut by granite intrusions. The granite is a very coarse-grained wdiite rock. The rhyolitic rock still occurs in patches on the higher mountain-summits, but westward, to the plains country, andesitic rocks predominate. In general they are breccias or true conglomerates, with boulders of a foot or so in diameter. They vary greatly in coarseness of grain, and in color they range from dark-red to purple, green and gray. The underlying shales and thinly-bedded limestones are rarely seen in the deeper cuts. Ho sandstone was seen, but a con- glomerate of chert and limestone pebbles, resembling our Dakota group, was seen on the western range of the mountains. These sedimentary rocks are intricately folded, and no general structure could be determined for them. The andesitic cover- ine extends westward to Bacubirito.

458 Sierra Mabre Occidental Of Chihuahua And Sinaloa.

The rocks of the Sierra Madre are all so altered by surface* Rgeiicies that perfectly fresh material cannot be obtained from natural exposiirek Thin sections of the rocks collected on the trip across the Sierra Madre have been examined tor me by my friend Prof. Alexander K WinchelL The prevailing rocks are dacites of varying texture. The ground-mass is commonly felsitie, with phenocrysts of quartz and plagioclase, and rarely orthoelase. In the specimens collected the ferromagnesian minerals are gone ; but their former presence is shown by the nests of hematite, magnetite, etc. Sphernlitic textures are common in the ground-mass. The most coninion rocks are dacites, which show crushed and re-cemented crystals of quartz and plagioclase. True tuffs are also very common. These da- cites grade into types in which the orthoelase is so abundant as to make basic rhyolites.

The andesites are, as a rule, too badly decomposed for careful study. Those at Guadalupe y Calvo are rather acidic, resem- bling trach\i:e in some slides. The rocks on the Bazonopa river are typical augite-andesites, as are also those of the foot- hills 'W. of the Sierra Madre. The granular rocks on the W. margin of the Sierra plateau are quartz-diorite, later than the andesites and certain of the dacites. This rock shows basic facies at the contact wdtli augite-andesites, the rock being a quartz-olivine gabbro. Quartz-diabase also occurs. Trachytes occur with the andesites, and in the field were not distinguished from the latter.

True granite occurs farther W. at a number of localities. Near La Cumbre the andesites and andesite-porphyry are the oldest rocks; and they are augitic, and sometimes contain large phenocrysts of plagioclase, though commonly they have the nominal andesitic habitus. They are cut by quartz-diorites, covered in turn by dacites, and then by rhyolites.

The order of succession is, therefore ;

6. Basalt, the youngest rock of the region.

5. Rhyolite.

4. Baeite.

3. Granite.

2. Trachyte..

1. Andesite, the oldest igneous rock of the region.

THE BISTPtICT OF HIDALGO DEL PARHAL IN 1820. 459’

The District of Hidalgo del Parral, Mexico, in 1820.

By Norberto Dominguez, Parral, 3Iexico.

(Mexican Meeting, November, 1901.)

In the year 1820 a commission, assisted by Sr. C. Fernando de Ainada, was appointed by Sr. Jose Ramon Mila de la Roca to report on the condition of the mining region of Parral, in the State of Chihuahua, Mexico, where in recent years the mines of Batopilas have reached an important development under American management. The object of the inquiry was to provide Sr. De la Roca with facts to support a project for reopening mines that two centuries before had produced a large amount of silver. Although this plan failed, many facts of interest in the history of the mines were presented. Much of the report dealt with questions that had only local application or were restricted to the conditions of labor and equipment in the opening of the nineteenth century. The historical part is pre- sented in the following paragraphs :

Abstract of the Report.

notwithstanding the difliculty of forming a just estimate of the system of mines in this mineral group in the valley of Senor San Jose del Parral without an examination of each of them, that which we shall say in a general way will suffice to convey an idea of their value and of the urgent necessity of reopening them. If this is undertaken, we believe the results will be of the highest consequence to the Republic, as well as to this immediate locality.

The group of the Villa del Parral covers the mineral terri- tory in which the village of that name was located. Its moun- tains contain large metallic veins, from which, as from the trunk of a tree, depend others much more slender, locally called crossing and interlacing each other in many direc-

tions. The first and oldest of these very rich deposits of gold

460 The Distb.Igt Op Hidalgo Del Parral Ik 1820.

and silver were worked wdtli great diligence bj our predeces- sors, though rudely, because of their lack of experience and the imperfections of their tools. The openings were superficial and confined to the richest parts of the veins. They had less knowledge than we of the art of extracting metals, being ignor- ant of the use of quicksilver for amalgamation, and of the re- agents which these rich ores require. For these reasons the working of the mines fell oflt, and was at last abandoned until the arrival of better-informed miners, who, by the use of quick- silver, restored the reputation of the mines with a success that is shown by the existence of the village, as well as by the build- ing of works for amalgamation, both hot and cold, and furnaces for smelting and cupellation.

The ease and low cost of working the surface ores led to the hope that mining could be continued in spite of the limited knowledge and extravagant methods of the miners ; but they reached the end of their powers, and, perhaps at the same time, the water-level of the mines. The expenses increased with depth, and, though the mines might have been drained, the capital required was not obtainable, as the profits of the mines had been invested in ranches, buildings, and other property, under the impression that their good fortune would last for- ever. The lack of capital has been the common cause for the lamentable condition in which we see the districts of Santa Bar- bara, San Francisco del Oro, San Diego de Minas hTuevas, San Patricio, Hueyuquilla, Almaloya, Balcequillo, San Pedro de la Cienega and Bonces Valles. All these mines occupy the best situations. The first five were large producers of gold and silver, but now do not turn out the hundredth part of their former yield, although they contain smelting-ores carrying lead, iron, copper and magistrat

The population of this Villa might have been one of the largest in the State, but the stoppage of work and removal of the miners to other localities, like Jesus Maria, has caused the town to fall into ruin. The archives are not full enough to allow us to give a complete account of the history of the mines ; and, in their present condition, it is impossible to ob- tain representative specimens of their ores, as the workings are caved and filled. The archives, which are very voluminous, show that work in the mines of the Villa del Parral began in

The Mstkict Of Hidalgo Del Parkal Ih 1820. 461

1632. Gold-ores had been found and mined in Santa Barbara as early as 1600. The settlement of Santa Barbara took place in 1556, before the discovery of its mineral wealth, and when only Sombrerete, Guadiana and Inde de la Tierrafuera were famous. By the year 1600 it had a population of 7000 miners, and in 1620 there were, in the entire district, 700 water-power iirrastres producing from 12 to 14 ounces of gold from a load of 12 arrobas (300 lbs.) of ore. In 1632 the deputation of the mines of the Parral and the government of the Villa were in- corporated and charged with the duty of keeping the archives. In the same year the authorities of the Santa Barbara mines commissioned Hernando de los Eeyes as Inspector of Mines, and from his report we learn that La Hegrita, the first mine discovered, was worked by 12 shareholders, and yielded 17 bars from 65| varas (58 yards) length of ground. The San Juan Pedro del Campo yielded 8 bars from 40 varas (37 yards). In 1633 a church was built at a cost of 8000 esos. In 1634 the prodncial bank was founded by order of the Marquis of Sinaloa in consequence of a report made to him by the Gov- ernor, Don Gonzalo Gomez de Cervantes, of the discovery of mines of great richness to be worked by amalgamation and smelting. The value went as high as a mark and a half per quintal (about 12 ounces to 100 lbs.), and many establishments for treating the ore were built. In this year the office of Official Assayer was founded, and Francisco de Zaldana ap- pointed. In 1635 six deaths occurred in the hTegrita mine, which was declared to be badly worked, and thereafter it was operated as an open cut. There were 4 establishments for amalgamation and 20 for smelting. Fifty Spaniards operated the mines in partnership, and others who had found mines were working them in person without any equipment. The town was growing, and the 19 shops which it possessed in 1632 increased to 58 in 1639. In 1645 ores were taken by cart from Parral to Cuencame, the freight being 7 reals per quintal. The decay of the mines was felt seriously in 1648, the ores being poor and many mines abandoned. More than two-thirds of the miners had gone away. These facts are obtained from a paper which shows that the miners had been paying 800 loesos yearly to the support of the clergy, which they were no longer able to do. Between 1641 and 1649, 569,741 marks of silver were

462 The Histbict Oe Hidalgo Del Pabeal In 1820.

stamped in the office of the Official Assayer. Formerly the miners had enjoyed the privilege of stamping their cidula on their silver, which then passed as coin.

From a volume of Acts dated 1648 it appears that the In- dians were obliged to work under their caciques but received wages. A census taken in 1649 shows that the mines in Santa Barbara contained only 176 persons of all ages and both sexes, and in Sail Diego de Minas 72 persons, besides domestics and miners. The old Negrita mine caved in, and the next year (1654) the mines of Santa Cruz were abandoned. From 1641 to 1688, 883,213 marks of silver were stamped in the AssayeFs office.

In the latter part of the eighteenth century one enterprising individual worked the mines with such diligence that he is said to have left Parral with a million pesos but he left the mines in a ruined state. Work continued to 1820 in a desultory way. The value of the ore in the mines of Parral was 12 ounces (Av.) to 300 lbs., and anything less than this was not profitable.

Villa del Farral , — The principal mines in this district are those in the hills nearest the Villa. Santa Cruz hill is also notable, because it was thought to contain the mother lode of the district. This lode is on the southern slope of the hill, and runs E. and W. In it are opened the mines called La Konquilla, El Tajo, Mercaderes, Franqueno, Apodaquena, and Miradena. On its northern side the hill contains another great lode which crosses from E. to W., and in this are situated the mines called Tecoletes, Aquilarena, Jesus Maria, and La Vivo- cilla. Both of these were rich and profitable veins, superior to others of the group, and conveniently situated near the town ; but the openings in them were limited in extent and made without comprehensive design. The labor and expense in- creased constantly, and the lack of proper equipment com- pelled their abandonment when water was reached, leaving riches, greater than they had taken out, to be flooded. The next hill, called Tarahumares, is also near the houses of the Villa, and, in fact, has some dwellings built among the crop- pings of the great lode that crosses it from E. to W. On that lode was opened the mine called San Antonio. It yielded rich ore, but water was encountered at moderate depth, and the mine was abandoned. The adjacent hills and table-lands of

The District Of Hidalgo Del Parral Ih 1820. 463

San Francisco las Cruces contain many veins, in wliicli are the San Francisco las Cruces, Vichena, Santa Cruz, Chequina, San Jose, Jesus Maria, San Vicente, Oabadena, and Soledad mines. As these are situated in the lowest and most level parts of the district, it is not surprising that water appeared in them at moderate depth, and the mines had a relatively short life.

The great need of the mines in this district is an equipment that will enable them to pump the water and sink shafts to any required depth. All the mines that have been named are paralyzed, not because they are wanting in profitable ores, but for lack of proper machinery. It is well known that the San Juanico mine was the only one supplied even with temporary machinery and worked with vigor. The plant came to the limit of its powers under the management of Don Fernando de Alfaro, and the mine was abandoned. He is reported to have left in the mine ore containing 60 to 70 marks of silver to 12 quintals (800 to 930 ounces per ton), which spurred him to make the greatest efforts to continue the work ; but it was im- possible, under the conditions.

The mine Cabadena, discovered in recent times by Clemente Cabada, was worked by him and other poor persons with a success that led to its purchase by men of some resources. They continued the work (putting in an inclined shaft with two whims for hoisting and drainage) as long as they had ore of 4 or 5 marks silver to 12 quintals (52 to 65 ounces per ton), treating it by means of amalgamation. When the flow of vrater increased, they decided to let the mine fill and make a new perpendicular shaft, which was commenced, but not com- pleted, and the mine remains closed to this day.

In the hills and table-lands situated in the locality called Hor- miguero are the mines named Covena, La Mineria, Santa Clara, Las Qurijas, and that of -tSTuestra Senora del Eayo. They have been but little worked, although they have produced good pay- ing ores and some with indications of great riches, as shown by the native silver contained in the outcrops. For this reason the miners worked them without leaving pillars, and now they are filled by caving.

The hill adjoining, known as San Bias or de la Palmilla, is noted for the number of lodes running FT. and S. within its boundaries, and in them are the San Juan Bautista, La Palmilla, VOL. xxxii.— 27

464 The District Of Hidalgo Del Parral Ix 1820.

Santa Gertrudis, La Mortajaj Taranguena Caldas, Santa Barbara, ]ifuestra SeSora del Carmen, San Eafael, ITiiestra Seiaora del Rosario, San Francisco, La Purisima, La Soledad, La Pena, and Diilees jSTombres. The ore is hard and requires good workmen and good tools, as well as the use of powder. The mines of San Bias should be provided with a complete mining equipment. One general installation will he sufficient for all the lodes.

In the hill called de las Yivoras are the mines named La Soledad, San Cristobal, El Carmen, and Palmitas, which are similar in every respect to those in San Bias. They are abam doned for the same lack of sufficient means to continue in them. After the first miners came the buseones (chloriders), who completed the ruin of the mines by removing the pillars, and threw their waste down the stopes, blocking up the good ores below.

In the other hills of the central district of Parral are the veins called del Bellocin, de la Eesolana, de los ITopales, La Carniceria, La Eoquilla, La Iguana y Teneritos, none of which are of especial importance.

The ores of this central district are very abundant, but the greater part of them yield the small return of 2 ounces of sil- ver to the load of 12 arrobas (300 lbs.). This is the general result ; but now and then a vein does not give even this return by amalgamation. If it were possible to defray expenses with this yield, mining in the central district of Parral would be on a very extensive scale, and there would be no equal to it in the Republic of Mexico. It would be necessary to remit the taxes upon the silver and provide the mines with the equipment re- quired at cost price. The works needed would not be very complicated, extensive, or costly, in the majority of the mines mentioned, for the mines of Parral enjoy many advantages that the others do not possess. We have seen the ancient mines of Silotepec and San Jose de Avenito preserved and kept in con- stant operation, the first by the help, of water-power and the second by animal power. Both defrayed expenses by the pro- ceeds of 2 ounces of silver per 12 arrobas of ore. If the dis- trict of Parral can be relieved from the tax on silver, and pro- vided with proper machinery, the extensive plant already in place can be made remunerative upon the yield mentioned. At

The District Of Hidalgo Del Parral In 1820. 465

present, 3 ounces per 12 arrobas are needed to cover the cost of the work. Even for ores of this class, carefully planned and permanent works are needed to overcome the ruined condition of the mines. The cost of the work will be abundantly repaid by the plentiful production of silver wdiich is certain to result from the extensive working of the mines.

Scmia Barbara , — This mining locality, which is 4 leagues from Parral in a SW*. direction, contains both gold- and silver- veins. It is situated among the foothills, and on the eastern slopes of the Sierra Madre. It is the oldest of the mining- camps in the interior States of the Eepublic, for it was occu- pied in 1556, when Parral, Chihuahua and other localities were unknown. The first discoveries were made on one of its gold- bearing veins by the old miners, Juan de Yelasquez, Miguel de Ituraldi, Venaneio de Castro and Bernardo de Santa Ana. The gold-mines of La Yasquena, Santa Clara, San Francisco, de Pillares, La Antigua, Cinco Toros, Taraciega, Monterilla, Que- vadena, Pelares and Franquena became famous. These mines yielded ores carrying 12 to 14 ounces (sometimes more) of gold to 12 arrobas, and it is said they frequently had leaf- and wire- gold in horizontal and vertical streaks.

The quantity of ore was so great that 700 water-power arras- ires were kept in operation and supported a population of 7000. The mines were worked to a depth of 150 varas (140 yards), and the history of the Yilla del Parral was repeated here. 'No pillars were left to support the walls, and the min- ing appliances were so poor that on reaching this depth the mines were abandoned, and remain to this day so caved and filled with waste that it is impossible to work them until proper equipment is provided. Many of the inhabitants left when the gold-mines of San Diego de Minas Ifuevas were discovered, 2 leagues distant. Those who remained turned their atten- tion to the silver-veins, in which there are now open the mines of Cabrestante, Santa Maria de la Bufa, Aseencion, Huestra Senora de los Dolores, San Jose, San Diego, Santisima Trini- dad, Dulces Hombres de Maria, La Soledad, San Antonio de Abaci, Nuestra Senora Dulces Hombres, San Antonio de Padua, Santa Grertrudis, Las Cabras, Garabatos and lIorieguena.

The silver-mines also were very rich at first, and their ores were treated by smelting and cupellatiou. Mining was very

466 The District Oe Hidalgo Del Paeral In 1820,

active for a time, but soon tlie discovery of the veins at Parral, and especially those of Chihuahua, drew off a large part of the population. Still, the surplus of lead in the Santa Barbara ore and the supply of litharge from the cupels which was sold at 100 jpesos per load, was used in beneficiating the dry ores of other localities. This enabled these mines to maintain them- selves for many years. There are no other ores of their class in the neighborhood, and the mines of the central district of Parral cannot be reopened with success unless the mines of Santa Barbara are worked also, to supply the necessary lead for the smelting-ores of Parral. This is the only reason for the continuance of work in Santa Barbara, where a small popula- tion is still employed in the Aseencion mine. The product of this mine, with the addition of ore sorted from the old heaps, slags from the old furnaces, and the results of prospecting, is sufficient for the small demand in the present condition of Parral.

San Francisco del Oro . — This mining-district is 4 leagues west of Villa del Parral, and also contains veins of gold and silver. It is situated at the base and on the thickly-wooded heights of Santa Barbara in the part facing east. The veins run H. and S., and in the gold-veins are the mines of Santa Barbara, Los Bronces, La Oapitanena, Plaza de Armas, Cinco Senores, La Hundida, La Soledad, Alvaradena, La Rata, San Jose de Gracia, Perros Bravos and Arembena. In the mother lode are the famous silver-mines called San Francisco, Labra- dena, Santo Tomas, San Antonio, Sainas, Cuadras, Sabanera and San Rafael.

The first-named gold-mines are in the same condition as those of Santa Barbara, 2 leagues distant, and abandoned like them. It is possible that they are opened in the same veins. The silver-mines in the main vein are rather important, having produced an abundance of paying ore, — sometimes of a very superior quality. Like all the others, they were worked with- out suitable appliances, and their owners soon found themselves obliged to abandon them while still in good ore. They took out the pillars, and this, with the subsequent operations of buscones (chloriders), resulted in the complete ruin of the mines. The San Francisco is the only one which could now be made productive. This is still working to some extent, but

The District Of Hidalgo Del Parral In 1820. 467

the bottom is flooded by mine-waters. For some time drainage was accomplished by means of a whim placed in the mine, but an accident in the shaft, which resulted fatally to the manager, caused the closing of the work. The ores were treated both by smelting and the patio and the greatest depth reached, according to report, was 200 varas (186 yards). The caved condition of the mines forbids an examination, but they con- tain good ores, and all they need is to be reopened with proper machinery.

San Diego de las Minas Nuevas , — This district is 3 leagues west of Parral, and, according to a registration made in 1645, was discovered by Diego Eodriguez. The mother lode runs 17. and S., and yielded ore of excellent quality. Twenty-nine mines were opened on it, some of which were worked to a depth of 200 varas. At that depth the mines no longer paid expenses, though the ore improved with depth. The lack of suitable equipment prevented an economical extraction. The high value of the ore led to the robbing of every pillar, and the mines caved in.

The vein is uniformly good throughout, — so much so that it deserves to be compared to the main lode of Catorce or that of Zacatecas. Compared to these mines, which have been worked to a great depth, this may be said to be in its begin- ning ; and, if properly opened, this lode might prove more prof- itable than those mentioned, which are much exhausted. In support of this statement, it may be added that, though sinking in the district of Minas ITuevas was stopped more than a century ago, the mines have continued to yield, and are still yielding, ore from their upper levels. More than 60 water-power arras- ires are kept at work producing silver, which is taken to Villa del Parral. The whole body of inhabitants, men, women and children, work in the mines. Much of the ore is sent to Par- ral for treatment, the supply of ore in the Villa being very scant.

A short time ago, 18 persons formed a company for the purpose of reopening the Francesena mine by means of a shaft to the drainage-level, but disagreements arose, and the work was abandoned at the depth of 114 varas. Afterwards the shaft was denounced by two shareholders, one of whom, Don Augustin Siqueiros, repaired the whim, but did nothing

468 The District Of Hidalgo Del Parral Ih 1820.

else, and the work has remained at a standstill. Another whim was placed in a temporary shaft in the old stopes of the Santo Domingo mine. These two undertakings are all that has been done in the last two centuries in these ancient and valuable mines. This district has produced large quantities of easily-worked ore, — so much, in fact, that lead for smelting with it went up to 10 ijesos per arroba (25 lbs.). Amalgama- tion, both in the patio and by heating, has always given good results. The ore obtained in working over the old stopes car- ries 2 or 3 marks to 12 quintals (27 to 40 ounces per ton).

San Patricio , — This district is about 3 leagues I7W. from the Villa del Parral. Its principal vein runs 17. and S., and on it the San Patricio, Tares, Trigueros, Santa Clara, Colorado, Moncenate, Campanas, Gromena, San Francisco and La Plomosa mines have been opened. Like those mentioned above, these mines were verj productive and profitable as far down as the mining appliances of that day permitted them to be sunk, and their history was the same, resulting in the robbery of the pillars and the falling in of the mines. After many years, a company composed of 6 persons undertook to revive the San Patricio by sinking a shaft, but the work was done in an ineffectual way, and after various vicissitudes was abandoned. Later on the mine was denounced by two rival parties, who prosecuted their respective claims in the courts of Guadalajara and Mexico for so many years that the timbers of the shaft rotted and caved. A third time the mine was denounced by the first deputy of the district, Don Mariano Deza, who cleaned up the shaft, and was sinking it deeper, when a fire in the store-room spread to the mine and destroyed all the new work. Since then it has lain idle.

Todos Santos , — This district is about 10 leagues IST. of Parral, and is situated close to the San Julian Hacienda. As in the other districts, its veins run FT. and S. The Huestra Senora del Rayo, San Francisco Javier, San Diego, Huestra Senora de la Soledad, San Isidro, San Mcolas, La Santisima Trinidad, San Cayetano, San Jose de Gracia and Los Dulces Nombres are the titles of its mines. These have been poorly worked, though they have yielded valuable ores. The openings are in- ferior in length and depth. The ores supply a superior magis tral as well as lead and earthy flux. They require smelting.

The District Of Hib.Lgo Del Parral Is 1820. 469

int tile ilemaiifl for tliem is now so restricted tliat there is no eiieuiiragemeiit to work the mines. Vheiiever the mines of die centra] clistrict of Parra! are revived, those of Todos Santos will probably be iiiidertaken also, for the ores of the two dis- rricts are complementary in their qualities.

Riie>j*iqtulla, — This district is 20 leagues E. of ParraL The veins in the hills called De los Reyes and Batopilas are 2 n . and S. veins, in which are found the mines named San ]!Sricolas, San Fernando, San Juain Santo Cristo, Refugio, Santo Bo- riiiiigo, Santa Maria and Magdalena. They are copper-mines, and have been "worked but little on account of the small de- mand for ores of this metal. They are valuable veins, however, and deserve to be compared with those of Santa Clara in Mi- ehoacan. The ore is oxide, and whenever copper is needed in the district for replacing worn parts of stamp mortars, or for other purposes, men are sent to mine a quantity of this ore. In this way these mines are valuable to the surrounding districts. Xot less important are the iron-lodes of this same locality of Hiieyiiquilla. They run from E. to and are situated back of the hill called Ohupaderos. The ore is rich and abundant, and attracted the attention of some enterprising men, but their knowledge was not sufficient to make good use of these fine deposits of iron.

Almaloya, — “Sme leagues E. of Parral, and situated in an isolated sierra of the same name, is the district of Almaloya. The few veins that have been found supply a smelting ore. They have been merely prospected by amateurs, who depended upon professional prospectors to do the work, and these did not always treat their employers honestly. For this reason no good commercial results were obtained, and the value of this district is still in doubt

Balcequillo . — Eight leagues SE. of Parral are hills or table- lands that are called Balcequillo. The veins are only opened by cuts dating from ancient times. The work was prosecuted with vigor, however, for the ores are easily reduced by smelting. The shallow trenches are opened in the decomposed upper part of the veins where the walls are not firm, and they have fallen in. The extent of the mining in Balcequillo is evidenced by the great heaps of slag that remain near the trenches in the outcrops.

470 The District Oe Hidalgo Del Parral In 1820,

In the great reduction-works, called Balcequillo, there had been four furnaces under construction, and two reverberatories, with their necessary adjuncts, all of the best make, and very costly. It was painful to see such a large and complete estab- lishment falling into ruins. The reason for abandoning these mines and works is not known. The district is extensive, and has plenty of ores which are handled easily, and are very use- ful in connection with those of the other districts. In any re- vival of mining in this neighborhood these mines should not be neglected. Work ought to be done in the trenches and the veins recovered.

San Pedro de la Cimega. — This district is 7 leagues E. of Par- ral, lying in the table-lands and hillocks from the hacienda of the same name to San Antonio de la Torreon. The veins run E. and W. Ifothing is known of the value of the ore, as there are only two openings — the San Pedro and Garniquena mines, in two parallel veins. Both require drainage. The ores appear valuable, but they were neglected by the ancients, who were unable to extract the silver contents. After lying idle for some time, the mines were declared by the present miner, Don Fer- nando de Ariada, who equipped them, and succeeded in amal- gamating the ore by the patio process. At present the returns are 4 to 5 marks per 12 quintals (53 to 66 ounces per ton). Ores of similar tenure are smelted. The depth of the mines is now 60 varas vertical. The other mines of Cienega remain deserted, although Don Fernando’s skill has shown the possi- bility of working them with profit.

Bonces Valles. — Five leagues S. of Parral, lying on the east- ern slope of the Santa Barbara section of the Sierra Madre, is Eonces Valles. Its veins run ST. and S., and the mines are the Sacramento, San Fernando, La Soledad, Santa Gertrudis, San hTicolas and San Camilo, besides many surface openings. The veins have been worked but little, for the ores are poor. Work is kept up in them on account of the magistral they yield, which is used in amalgamating the ore of Parral. The extraction of ore is irregular, being confined to the varying wants of the Parral establishments, which send men to Eonces Valles when they need magistral. The future of this district is bound up with the reopening of the Parral veins.

In fact, this is the situation of all the ten mineral districts

The Distpjct Of Hidalgo Del Pakhal In 1820. 471

siiiTOLincliiig tlie Villa del Parral. The greater number have veins of value, both main and subordinate lodes. A great number of mines have been opened in them, those mentioned here being only the principal ones. All their products are valm able — gold, silver, copper, lead, iron, ynagistml and concentrates.

In addition to the advantages mentioned above is the favor- able situation of the mines for establishing the machinery and equipment they need. For the most part the roads are good, and could easily be made serviceable for wagon traffic, and the distances are short. In the small river which flows through the central district there is water enough for the works, though the supply is scant in the summer. The surrounding villages furnish not only mining and living supplies, but men for the mines and reduction-works, and animals for transportation and power. Supplies are abundant and prices reasonable.

The census of the Villa del Parral shows 8000 inhabitants, though the place is largely in a dilapidated condition. The climate is even, and extremes of temperature are rarely felt. The revival of the central district will be the most easy to ac- complish. All of these districts, for lack of capital and skill, now produce but little. It is advisable to undertake their reha- bilitation without delay, because they are advancing to their complete extermination in a wmy that will bring the mining industry here to an end in a very short time. The precarious search for ore in the old works must soon he finished, and no fresh discoveries of smaller veins or layers are to be hoped for. The people are too poor to provide the means of draining the mines.

The development of this region has depended, up to this time, upon a mad avarice which sought to seize immediate re- turns without providing for the needs of the future. The dis- astrous results have been used as arguments on which to found a distrust of mining enterprises to which the Mexican Pepublic owes the origin of its agriculture, commerce and arts.

Appekdix.

Historical and statistical data taken from the programme issued by the Local Committee at Parral for the members of the Institute visiting there during the Mexican Meeting :

472 The District Oe Hidalgo Del Parral In 1820.

Hidalgo del Parral.

Established in 1600. First records in archives existing in the Town Hall bear date of 1612. The first official register of mines, in the year 1632, is a volume of 485 pages.

The general formation of the Parral district is porphyry, and the veins are very strong and well-defined. The greatest depth so far attained, despite the age of the camp, is about 1000 feet, and this in but one instance, where the vein not only shows strong, but the values continue about as on the upper levels. The ores of the Parral district immediately surrounding the city are siliceous, carrying a small amount of lead.

Among the bits of comparatively modern history that are told by the older residents of the place can well be classed as ranking in prominence that of the copper coin ‘ tlaco.’ Early in the 60’s of the past century the government of the State of Chihuahua secured authority to issue one million copper coins of the value of three cents each. These coins were called quartillos (a quarter of a real — 12J cents. The contract for the minting of these coins was let to a foreigner, who, re- alizing his opportunity, minted two million of the coins, float- ing the extra coin on his own responsibility. Later this was discovered by the State and the value of the coin reduced one- half. The coin was then dubbed tlaco ’ by the poorer classes. It is also interesting to note that in those times all day labor was paid in copper, and many interesting stories are told of laborers who carried home, weekly, from six to ten pounds of copper coin for their week's labor, and even then earning less than one dollar per day.

Apropos of this is a story told of one of the principal busi- ness houses at the time taking advantage of the decline of the copper coin. The passage of the bill was anticipated by them and a special messenger stationed at the palace in the city of Chihuahua. The bill was passed on Hov. 9, 1869, and the messenger, riding posthaste, arrived in this city several hours in advance of the government messenger. The house, in the meantime, had invested their surplus copper — about |30,000 — in sugar, cotiees, and other substantial merchandise, at par.

It is claimed that Parral was the last town in the northern part of the Pepublic to surrender to the Diaz authorities in

The Bistrict Of Hidalgo Del Paekal Ix 1820. 473

"'Before the advent of tlie railroad, ores were hauled by wagon to Jimenez, and from there shipped to Socorro, 27. M., El Paso, Texas, or Mapimi, for treatment. With the road came foreign capital ; and, seeing the opportunity, heavy investments were made and elaborate <levelopment began, with the result that within the past two years mills have been completed (or are now under constriietioiij for the treatment of over 1200 tons of ore daily. Tramways and overhead cables have been put in, and every advantage taken of the natural surroundings, not only for the convenient handling of the ores, but for the reduction of expense, in order that the large bodies of low- grade ores may be advantageously handled.

ParraVs Railroad Facilities. — Within the past year the Mex- ican Central has been extended south-west of Parral to the Eio Florido, a distance of 44 miles. A branch has been built ' to Santa Barbara, thus opening a new point of shipment for many of the large camps south and west of Parral.

“ The Parral and Durango railroad, connecting Minas Xuevas with Parral, and running on west over the mountains a dis- tance of 65 kilometers, taps one of the largest mrgin timber belts in this part of the Republic, and if, as intended, it is car- ried on, will open a valuable mining and agricultural section to the west. A sawmill was recently completed on this line, and square and round mining timber of a very fine quality is now being placed at the different mines at a much less cost than formerly.

“ Mining Camps Supplied by Parral. — Guanacevi, Inde, Magis- tral, Guadalupe y Calvo, El Carmen, El Oro, Cordero, Allende,, Cusihuarachie, and many smaller camps.”

Popidation of the District of Hidalgo in the Year 1900.

Parral, 16,382

Santa Barbara, .6,714

Minas Xuevas, 5,372

Las Cuevas, 4,788

Balleza, 4, 651

Zaragoza, 4,172

Olivas, 2,324

Tuli, 2,533

Rosario, 1,484

Huejotitan, 954

Total,

49,374

474 The District Of Hidalgo Del Parral Ik 1820.

Reduction - Works in the ParroJ. District.

Hidalgo Mining Co.’s Mill No 2, , Hidalgo Mining Co.’s Mill No. 3, . Parral Milling Co.’s Mill No. 1, .

Parral Milling Co.'s Mill No. 2, .

F. Stallforth Hmnos., Sacrs y Cia, Angel Garcia ( constructing), .

Daily Capacity,

Process. Tons.

Lixiviation. 80

Lixiriation. 75

Lixiviation. 50

Concentrating. 40

Patio. 40

Lixiviation. 75

Present Production of the Mines of Parral District (Nov, 1901).

Quebradillas,

Description.

. Silver.

Tons, Mill.

Tons, Export.

Presena,

Alfareua, '

. Silver.

Morena, 1

Los Muertos,

. Silver.

Eefugio, .

. Silver.

Sierra Madre, .

. Silver.

Santa Ana,

. Silver.

Palmilla, .

. Gold.

SayfiaSj

. Silver.

Buena Vista,

. Silver.

Cerro Colorado, .

. Silver.

. Silver.

Jesus Maria,

. Silver.

San Patricio,

. Silver.

Rebariche,

. Silver.

Iguana,

. Silver.

Trinidad, .

. Silver.

Tajo, .

, Silver.

San Antonio Caldas,

. Silver.

San Cristobal, .

. Silver.

San Vicenti,

. Silver.

La Lnion, .

. Silver.

Minas iSTuEVAS.

The first mine located (by Diego Eodrigo in 1645) in the district was the Veta Grande, on the Veta Colorado, which is the strongest and most prominent vein in the district, and most probably the largest vein in the Republic of Mexico as to dimen- sions, and is plainly traceable for a distance of 10 m. over the mountains, averaging, so far as disclosed from present develop- ment, about 300 ft. wide. The greatest depth reached on this vein, in the Veta Grande, is about 1000 ft. vertical, or 1250 ft. on the incline ; the bottom of the shaft shows a good strong vein, 15 to 18 ft. in width and assaying from 45 to 50 oz.

The District Of Hidalgo Del Pareal In 1820. 475

Among tlie older mines on this vein are the San Francisco de la Moreiia, worked to a depth of 700 ft. on the incline ; the Xopal; worked to 700 ft.; the Presena and AlfareSa, now at a depth of 900 ft. on the incline; Bizcajna, to a depth of about 600 ft; El Yerde. to a depth of about 1100 ft. on the incline. There are also on this vein the Quebradillas, worked on the southern extension to a depth of 550 ft, while the north end, which has been opened in the past ten years, and is now proving a bonanza, is worked to a depth of 725 ft; Los Muertos, to a depth of 680 ft.: Pachuquena, to a depth of 700 ft The ores from the mines located upon this vein carry red oxide of iron, giving them a red color — hence the name " Yeta Colorado,’ or Red Yein.’'

Santa Barbara.

At one time the capital of the Province of ISTeuva Yiscaya, comprising at that time the States and Territories of Chihua- hua, Texas, 27ew Mexico, Arizona, California, and part of So- nora and Coahuila. The first mineral discovered in Northern Mexico was the gold-ore of this place, in the year 1547.

“ After a comparatively few years of most vigorous production the mine owners of this immediate district found it impossible to keep miners employed, for at this time the discovery of the famous Yeta Colorado was made in the district then known as San Diego de Minas Nuevas — now Minas Nuevas — and a gen- eral exodus of miners seems to have taken place. But little mention is made in the records of Santa Barbara after the first flush of discovery had faded until in the early part of the nine- teenth century, when mention is made of the advent of foreign capital and of extensive work on the Mina del Agua, which was abandoned after reaching a depth of 60 ft. below the water-level. In the year 1892 it was again opened up; and, with the aid of a very small capital, a foreign enterprise extracted from this mine in less than one year over $ 80 , 000 , net.

Mention is made of large and extensive ‘ gambocino ’ — gopher — workings on all of the larger veins, which, from general records, have proved profitable to the operator, but most ruin- ous not only to the mine but to the camp in general.

The general formation is slate and shale, the trend of the veins being from north to south, the larger and more plainly

476 The District Of Hidalgo Del Parbal In 1820.

traceable of wliicli are the Teeolotes and Mina del Agua, which can be traced for distances of 3 or 4 m. over the moun- tains, the incline of the veins being from 45° to 75°.

“ 57ear the surface were found pockets of very rich gold-ore ; below the oxidized ores, however, the grade is much lower, yet more regular and in large quantities.

The old method of assaying is most interesting, and goes to show that while the records are exact so far as the primitive method of assaying was able to prove, yet they were no doubt far short of showing the real value of the ores. Three hundred pounds of ore was taken as a sample and treated by the patio process, and the silver, after retorting, showed the number of marcos per carga. Thus the value of the ore was based upon the actual extraction by quicksilver only. In smelting, a similar method was followed, excepting that lead-ores were smelted, and the lead oxidized off, the bar of silver bullion showing the value per carga. Many of the slag-piles of smelters that were operated in the olden times have of recent years been bought and shipped to outside smelters, netting the pur- chasers a handsome profit. Another method of assaying, and that used in many of the more primitively worked mines to the present time, is that of blistering ’ in the blacksmith’s forge.

“ The allotment of space for appropriate plazas was by no means overlooked by the fathers of the olden time, as the well- regulated plazas of the present will verify.

About two years ago a California company secured an elec- tric light and telephone concession from the city, and at once erected a modern plant on both systems. About a year ago they extended their telephone system to Santa Barbara, and are now extending to the different mines surroundiug the camp. This same company holds a concession for the con- struction of a water system, active work has been commenced, and it is expected to have the system in operation by February 1st of the coming year (1902).

“ The altitude of the city is 5500 ft., making the climate most delightful in summer and mild in winter.

The Parral river, a small yet permanent stream, affords the city the very best of sewerage outlet.

Figuring quite nicely in legendry is the church, which still stands in a state of good preservation — that of Fuestra Senora de

The Bisirict Of Hidalgo Del Parral Ix 1820 . 477

Guadalupe — wliicli was completed about the year 1710, being constructed by an Indian who, at that time, was working a gold- mine of fabulous richness, the whereabouts of the same being known to no one but himself, and each Saturday evening he would bring a brick of the yellow metal, with which he would pay the w'orkmen. All efforts of recent date to locate the mine from which the church was built havm been unsuccessful.

‘“In the year 1867 labor-miners were receiving from 50 cents to 75 cents per day: peons, from 25 cents to 37 cents per clay. At the present time the former earn from $1.25 to $1.50 per day, and the latter from $1.00 to $1.25 per day.

The advent of modern steam machinery dates from the early 50’s of the past century, when a boiler and engine were put up ill the Huertas ’ to operate a large number of arrastres and sixteen Castilian furnaces in use at that time. The total output of the sixteen furnaces was about nine tons per day, running at full capacity.

After this came the fatio process mill, which is now run with the addition of steam and with the aid of modern machinery.

The first lixiviation plant in the camp, ruins of which still remain, was erected by the Hidalgo Mining Co., on Oerro de la Cruz,’ in the year 1886.”

lie ft uciion -Works at Santa Barbara,

Daily Capacity,

Process. Tons.

Montezuma Lead Co.s . . . Concentrating. 375

Guggenheim Exploration Co.s Mill (under construction), Concentrating. 400

San Francisco del Oro, Lixiviation- 40

Parral Mine, Limited, Amal. and Con. 40

Historical Mines.

“ Alfarena, San Francisco del Oro, San Albino group, Que- bradillas, Los Muertos, Terrenatis, Tecolotes, Mina del Agua, Ceyote group, Franquena, Veta Grande, El Verde, La Union, Oerro Colorado, Esperia, Hisperides, Caballo, El Toro, Tajo, Prieta, Jesus Maria, Aguilerena, Palmilla, San Juanieo, Caba- dena, San Cristobal, San Patricio, Las Cruces, Refugio, Hopal, La Morena, Presena, Hovidad.”

478 The Mineral Zone Of Santa Maria Bel Rio.

The Mineral Zone of Santa Maria del Rio, San Luis Potosi,

Mexico.

By Jesus P. Manzano, Pachuca, State Of Hidalgo, Mexico.

(Mexican Meeting, November, liK)l )

The report of which this paper is a summary was made in 1890 for the Compania Investigadora Mexicana y Americana. Since the region examined covers 900 sq. kilom., chiefly of wooded and rocky hills, almost without roads, and for the most part uninhabited, wdiile the examination had to be made in two months, of which period more than 15 days were continuously rainy, I need not say that this account is not complete and thorough.

L Geography and Topography.

The center of this zone, 19 kilom. SW. of San Luis Potosi, is situated in lat 21® 24' 57., and long. 2® 3' W, of Mexico City. The altitude ranges from 1866 m. (that of San Luis) to 2816 m. (that of the Eealito mountain), in the Sierra de San Luis. The topography is hilly — partly wooded, partly bare. The principal more level areas are the Bledos valley on the south, and portions of the haciendas of Tepetates, San Fran- cisco and Santiago, on the west.

The water-supply is scanty. The two streams that cross the Zone, the Santiago and Bledos rivers, carry water nearly the year through, though much reduced in the dry season. Other streams are torrents of less importance. All the waters of the valley and Sierra of San Luis are absorbed or sink, not passing beyond Soledad de los Eanchos. The Continental di- vide is within the Zone, some waters going west to the Pacific, others east to the Gulf of Mexico.

II. Geology.

Concerning the geology of this district I condense the fol- lowing from the memoir, Las Minas de GruanajiiatOj prepared for the Minister of Fomento by Senor Pedro Lopez Monroy, mining engineer, which I am entirely in accord. He says, in substance :

The Mixeral Zone Of Santa Maria Del Rio.

The geology of these mountain groups is very monotonous. On every -ide they exhibit Tertiary strata, in places 'vuth the stratification more or less defined, in others with the sedimentary character partially or entirely obliterated, so that tlie altered rocks occur as trachytic porphjory of varied mineraiogical character. On the grand scale these rocks have columnar structure and are precipitous in elevated situations, or at least terraced in bold bluffs, or they may have a strati- fied structure passing over to well-defined strata. Frequently these strata, altered :o porphyry by metamorphism, show locally a spheroidal and spherulitic struc- ture.

The Cretaceous formation appears upon an exceedingly limited area near the small mining camp of Bernalejo. It is fairly well defined by its lithological characters, being composed for the greater part of well-marked gray vada, which alternates with various slates. Although no fossils have been found in these strata, they can probably be assigned to the Cretaceous on stratigraphic grounds, as a continuation of the mountain system E. of the city of San Luis Potosi and of the Mineral de Ptnof not far distant.

‘ Upon these strata, which are covered on one side by the Quaternary of the plain, rest unconformably Tertiary strata that show themselves in the form of boulders of singular aspect.

‘ The agency that has been powerful enough to alter the pre-existing Tertiary strata to porphyry was undoubtedly basalt and the emanations pertaining to it. It is the only igneous rock that shows on the surface (as on the Cuchilla de los Fierros S. of the Boca de Canada, or in the Contrapeage ; in Ogo de Agua, Isidro ; and in Puerto Colorado near the culminating point of the high road of San Luis toward the Villa de Ariaga, etc. ). The metamorphism due to its influence is exhibited clearly in the neighborhood.

“ Connected with the basalt are dikes or small eruptions of vitriofido, as in the Canon de las Presas, below the Mesa de la Santmima Virgin, XW. of the rancho de Calderos ; S. of and below the Picacho de Bernalejo ; in the Mesas de los Ckilitos (southern slope), E. of the peak that stands XW. of Bledos and X, of Garraneo; in the Cerro de las Palomas, W. of Bledos, near the Mesa de las Ardillas, Pena Larga, etc. The rock abounds in grains and crystals of olivine.

“It is a notable fact that wherever the vitriofido appears, deposits of tin are found near by; so that these dikes may serve as a guide to the discovery of tin-ore.

“The elevation of the mountainous area of the Zone is clearly allied to that of Mexico in general, produced by movements corresponding to a veritable deluge of basalt, most probably of Miocene age.

“Upon the slopes of the mountains of pseudo-porphyry are occasionally found extinguished hydrothermal springs, recognized to-day by the white layers of chalk deposited in short channels ; and among these are found skeletons of gigantic mammalia, as at the foot of the Cerro dd Gigante, XW- of Carraneo.

“ In the plains immediately E. of the Zone, which are but the prolongation of the valley itself of the city of San Luis Potosi, should be found, superposed on the Pliocene layers, the heavy Quaternary deposits resulting from the exten- sive erosions of the mountains produced by rains.’’

m. Mineral Deposits.

In and near this Zone are found deposits of silver, tin, mer- eury, bismuth and iron, described separately as follows :

VOL. xx2ai.--28

The Mineral Zone Oe Santa Maria Del Rio.

Silver- Ores,

The most important argentiferous area within the Zone is situated on the east in Bernalejo. Silver-bearing veins are found also SE. of San Luis Potosi, toward the Canada del Lobo,

According to information obtained at the last moment, Ber- nalejo may be regarded as a small mineral district having an extent of about 6 kilom. fromE". to S., between Pedernales and Pando hill, and 2 kilom. from E. to W., from the hacienda Semsache to the edge of the mountains. Its system of veins occurs in the slate which, as I have said, is probably Creta- ceous ; my opinion being deduced from the analogy between this, in which I have not found fossils, and other localities where they have been found.

The strike of the veins varies from E. 40® E. to E. 75® W". (their tendency to change direction being noticeable), and the thickness is 0.20 to 2.35 m. (on the surface; but underground, according to reliable reports, the JPurissima Concepcion mine has reached as much as 6 m.). The dip varies from 68® E. to 67® S. The matrix is quartz and steatite, more or less ferruginous. The unaltered ore consists of gray silver, argentite and ruby silver (pyrargyrite), accompanied by cubic pyrite, chalco- pyrite, etc.

I can say nothing about the production and value of these lodes, having had, so far, no results from my inquiries on this subject. The only fact that speaks in favor of their richness is the existence of a considerable production from the Pans- dma Concepcion mine. The specimens I have gathered from what was left of the first-class ore do not show a higher quality than 0.02 per cent. (6 oz. per ton).

The Purissima Concepcion which belongs to the 3d Compania Restaumdora del Mineral de Bernalejo is working now, and has reached a depth of 202 m. Cross-cuts will be run E. and S. to test the principal and adjoining veins, and these will be ex- ploited if ore is found. This company has an establishment, 1.5 kilom. from the mine, containing a Chilean mill, 15 arras- tres, an agitator or rnixing-tank, and a patio, A large smelb ing-works has been established near the city of San Luis Potosi, and is receiving ores from the various districts of the Eepublic.

The Mixeral Zoxe Of Santa Maria Dee Rio.

The other argentiferous portion of the Zone is situated, ac- cording to information, less than 7 kilom. SE. from San Luis, in the ramne of the Lobo. Various lodes and prospecting-pits are found in this region, which seems inferior to Bernalejo. Want of time prevented mv visiting it.

Jlercury-Ores.

Only in Zaeate hill, X. of CaesfxL Colorado have I found cin- nabar in semi-opal, but in such small quantities that it has not paid for mining. Trustworthy persons have informed me that mercury occurs in the Sierra de San MigiieHto also ; but I have not been able to find it.

Bismuth- Ores,

At a short distance E. from the Ighsia del Desierto, W. of San Luis Potosi, deposits of bismuth-ocher with steatite are found among the deposits of tin. In the same mine, the S. and E. workings produce bismuth-ocher, and the W. workings tin. It has been impossible to examine to the north, because the openings are ruined. The bismuth is found in such small quantities that it has not been worth while to extract it.

Iron- Ores,

Iron-ore is found in various parts of the Zone, but nowhere of valuable quality.

Tin- Ores.

Tin-ores are frequently found in the mountainous parts of the Zone (which cover practically about its whole surface). Both cassiterite and stream-tin are known. The mineral pre- sents itself in several different ways. Sometimes it is in more or less defined veins, in which the ore is now mixed with the matrix, now separated in kidney-shaped pieces, incrustations or nuclei of chalcedony or cacholonga (a variety of chalcedony). Sometimes it is found only as seams deposited in the walls by the sublimation of the tin from the interior. It is found also in the conglomerates that fill the hollows of the rocks, and in brooks, or on the slopes of the mountains, in the form of kid- ney-shaped fragments or earthy deposits, forming at times a kind of placer. Sometimes, again, the tin-ore occurs unaccom- panied by other metals ; but more frequently it is found with micaceous or red hematite, topaz, etc. There are frequent in-

The Mineral Zone Of Santa Maria Del Rio.

stances in wMch tlie quantity of tlie specular hematite exceeds that of the tin-ore. "When tin-ore is nearly pure, it is called metal de eorrea ; when the iron predominates or is equal in quantity to the tin, it is called plomilku The latter requires a more difficult and costly metallurgical treatment, and gives a brittle tin of poor quality — though, with proper treatment, tin of good quality can be made from it.

I have sought carefully for a deposit of tin that would offer favorable conditions for organizing an important industry, and beyond the Zone, southward, toward San Pedro, I have found deposits now actively worked; but these, like all the other deposits I have visited, whether they have been wmrked and are now exhausted or have not been opened at all, are of very limited dimensions. The largest I have seen is that of Veta Honda in the hacienda of San Pedro, worked to a depth of a little more than 40 m. and stoped for a length of 100 m. on a vein which reaches a thickness of 0.42 m. In the hacienda of Santiago, the Rincon Grayide lode, 0.2 m. thick, was opened to a depth of 45 m. and a length of 12 m., producing in the year 1882 more than 44,000 kilog. of tin. I understand that only by fitting up works in a special manner and with extreme economy could there be any profit, and this presupposes a good price for tin.

In the hacienda of Bledos, Mr. Yabala, who had been a la- borer, devoted himself to exploiting tin-ores, and in a few years acquired a capital of |50,000. The mine of Boquilla in San Pedro, now in operation, with a thickness of between 0.02 and 0.29 m., has produced in its period of abundance 2750 kilog. of ore in a week. Mr. Garcia, who works three mines, was able to establish for about six months a weekly delivery of 400 or 500 kilog. of metallic tin. The tin-ores are variable in yield, the ferruginous kind giving generally 25 and the best from 35 to 80 per cent.

Timber for building and wood for fuel are found only in the southern portion of the Zone, where there is oak, pinon or nut pine, ocote or pitch pine, and some pine. The forests are not very thick, nor are the trees large. The northern part of the Sierra, toward San Luis Potosi, is absolutely devoid of vege- tation. At present the market of San Luis is supplied largely from the United States.

The Mixeral Zone Of Saxta Maria Bel Rio.

Btolduig-JlrdenaL

Calcareous stone more or less good is found in various local- ities, — not in heavy beds, but in superficial layers of small thick- ness, covering limited areas. It may be regarded as a calcare- ous tuft* and is sold in San Luis for |0.50 to |0.60 per 100 kilog. Quartz sand is abundant and sells for little more than the cost of freight, or |0.30 to §0.50 per cubic meter.

Good building-stones are met with everywhere. They are generally porphyritic, more or less resistant, and can be easily cut. I have seen blocks for caps, as much as 5 m. long, used in construction. There is also a pumiceous tufa, lighter and of good resistance.

IV. Means of Communication.

The Zone is situated near four towms : San Luis Potosi, 3 kilom. of the N. side ; Villa de Eeyes, 8 kilom. from the SE. corner; Villa de Arriaga, 14 kilom. from the SW. corner; and Eeal de Pinos, 40 kilom. from the HW. corner. The roads are in good condition for carts, and the Hacional and Central railroads both pass through San Luis, while the station La Pilla of the Hacioiial line is within the Zone. In the Zone itself there is only one ivagon-road, going SW. from San Luis, which is in good condition on the whole, though somewhat steep in places. The mountainous character of the Zone will make the opening of roads expensive.

V. Labor.

Skilled miners are scarce, but could, of course, be obtained from other parts of the Eepublic. The laborers of San Luis Potosi are docile, intelligent and industrious. Wages in 1890 were as follows :

A peon received from |0.18 Mex. per day upward.

A driller, Mex. for a hole 84 eentim. deep, he furnishing tools and powder.

Or, if working in ore, he might receive |1, |2, or even $3.75 per 11 kilog. In San Luis Potosi the metallic tin is sold at $28 and $30 per quintal.

Blacksmiths received from $0.25 to $0.50 ; carpenters, from $0.35 to $1.10 ; and masons, from $0.50 to $0.75 per day — the smaller amounts being paid to helpers and the larger to skilled workmen. The average pay of foremen was $1 per day.

A Study Of Amalgamation Methods.

A Study of Amalgamation Methods, Especially the Patio Process, with the Object of Avoiding the Loss of Mercury.

By Miguel Bustamente, Jr., Mining Engineer, City Of Mexico.

(Mexican Meeting, November, 1901.)

I. Gold-Amalgamation.

In 1890 I was manager of a mining enterprise in the State of Michoacan. The ores were composed principally of iron pyrites (much decomposed), in a quartz matrix, with native gold in very irregular grains. Some jiortions, however, carried their metallic value in a matrix of calcite and siderite. The mill in which the ores were treated consisted of two 800-lb. stamps, two amalgamating-plates, four pans, two automatic washers, two True vanners, and the necessary accessories for assaying, retorting and refining gold. The plant, originally erected with American capital, and directed by competent Americans, passed in 1890 into the hands of Mexican owners. On taking charge of the business I found on hand a large amount of ore assaying 35 grammes of gold per metric ton (about 1 oz. Troy per ton of 2000 lbs.) ; hut the company was losing money, and was about to abandon the business.

Obviously, the difficulty lay in the treatment of the ore. The extraction of gold scarcely reached one-tenth of the assay- value ; the loss of mercury was considerable ; and high freight- charges excluded the alternative of exporting the ores.

This situation naturally suggested that amalgamation was not applicable to these ores, and that a more appropriate method must be adopted.

The cyanide- and chlorination-methods had been tried already, without practically satisfactory results. For the first few months I employed a combined system, extracting a part of the gold by direct amalgamation, and cyaniding the concen- trates. This saved 32 per cent, of the assay-value, but the cost of milling still exceeded the proceeds. Meanwhile I observed

A Study Of Amal<;Amati0N Methods.

that on certain occasions during the amalgamation there was a verj perceptible escape of hydrogen sulphide. This I could not satisfactorily explain ; but, on the other hand, it accounted for the great loss of mercury which had made amalgamation so expensive and ineffective.

To remedy this (and also diminish the great quantity of cy- anide of potassium that had to be used, especially when the gangiie of the mineral was calcite), I began with a reverbera- tory roasting of the crude ore delivered to the mill, and a sub- sequent washing with water, until the latter came off perfectly clear. The operations of amalgamation, concentration and cyaniding were then performed as before, and the result was a gold-extraction of 68 per cent, of the assay-value, with a loss of 11 per cent, of the mercury used.

This loss surprised me ; nevertheless, under these conditions the milling of the ores began to be remunerative, and I could afford to study the subject with more leisure and less anxiety. On further investigation, the gold which had escaped amalga- mation was found to be in a peculiar state of aggregation, re- minding one strongly of the platinum sponge in its tend- ency to condense some gases. I think that the gold could be found there in another form also, analogous to so-called “ black platinum.”

Once this fact was discovered, the explanation of the pre- vious phenomena was not difficult. The very finely-divided sponge and black gold, coming into contact with the mercury, provoked an energetic electro-chemical action ; and this decom- posed a relatively large quantity of water, the oxygen of which was absorbed by the sponge, while the hydrogen, combining with the sulphur of the pyrite, produced hjxlrogen sulphide. Of the latter, a part escaped as free gas, and a part attacked the mercury, producing mercury sulphide, which explains the great loss of that metal.

Of course the actual reactions are much more complicated than this rough statement; but the principal result, the forma- tion of mercury sulphide, has been conclusively proved by anal- ysis. The loss of the gold is also explained, whenever the sponge or the black gold is present under such conditions as to operate like the electro-positive element of an electric couple ; that is to say, when it will receive, condense and hold oxygen,

A Study Of Amalgamation Methods

and te returned Toy the electro-negative element of the couple in question. This I will prove later on.

The investigation was continued, to find a method of treat- ment which would both reduce the loss of mercury and in- crease the extraction of gold. Since the gold occurred in the gangiie in grains of varying size, sometimes, but not always, impalpable, it seemed impossible to dispense with amalgama- tion entirely. On the other hand, a subsequent cyaiiiding was impaired by the foregoing pulverizing with stamps, which gave a large amount of slimes, through which it was difficult to pass the cyanide solutions. Moreover, these solutions were imme- diately transformed into carbonates and ammonia salts, and the consumption of cyanide was excessive. Treatment with chlo- rine was also difficult, and by neither of the two methods was I able, in my laboratory experiments, to obtain more than 40 per cent, of the assay-value.

I resolved, therefore, to continue experimentally the amalga- mation, supplemented at first with cyaniding, and prefaced with roasting, as above described. Having abundance of hydraulic power, I began the use, with certain modifications, of the Sie- mens and Halske method of precipitating the gold. This in- creased by 15 per cent, of the assay-value the extraction of gold, and also reduced the expense of treatment. Precipitation with zinc was therefore abandoned. The increased extraction was undoubtedly occasioned by the employment of the electric current, since the treatment had not been otherwise modified, and the average composition of the ores had not changed. A comparative experiment, in which a given lot of concentrates was cyanidecl, and one part was treated with zinc-precipitation, and the other with the electric current instead, entirely con- firmed this hypothesis. In the first case 60 per cent., and in the second 66.30 per cent, of the assay-value was obtained.

The examination of various works on electro-metallurgy and electricity furnished me with little or nothing in the way of further guidance, except certain hints as to the movements of bodies and substances in solution, produced by the electric current, and the irregular decomposition of the electrodes, which seemed to indicate the key to the problem. "Without recapitulating here the statements of Parret (1816), Becquerel, De la Eive, Wiedemann, Jurgensen (1860), Quincke, Herschel,

A Study Of Amalgamation Methods.

and Xobilli. I will simply say that their investigations, together with my own exiserience, led me to attempt the treatment of the ores in question by amalgamation only, with the aid of the electric current.

Before devising a process of my own, however, I tried those of Body (1894), B. C. Moloy (1894), and others, vdthout satis- factory results. Finally, after some experiment and change in my first apparatus, I perfected a method by which the loss of mercury was reduced to 0.03 per cent, and the extraction of gold brought up to 95 per cent of the assay-value, while the cost of treatment was lowered until it only amounted to f 0.42 per ton for crushing, and |0.19 for amalgamation and the elec- tric current.

At first, this method consisted in reverberatory roasting of the ore and washing abundantly vuth water, then passing it through the mortars, where it was pulverized and began to amalgamate. The mortars were provided with interior amal- gamating-plates, in communication with the poles of a dynamo that produced a current of 150 amperes, 14 volts. The two stamp-batteries discharged into a common channel, in which, side by side, were placed the large amalgamating-plates, one communicating with the positive pole, the other with the nega- tive. This arrangement gave encouraging results ; but in view of the energetic decomposition of water which attended it, the electro-motive power was diminished by subdividing the amal- gamation-plates and uniting them, not in series, but in tension. This produced the much-desired result. The liberation of gases diminished considerably, and the loss of mercury became in- significant.

Similar dispositions were made for the pans and the washers. Over the wooden shoes were placed amalgamating-plates 2 decim. square, and on the side-walls of the buckets similar plates 0.5 m. square, united, in tension, with the poles of the dynamos, in such a manner that the electro-motive power would not exceed 1.5 volts. Later, the aggregate surface of the plates was enlarged to some 15 m. square, which gave the best results. A further increase of surface would have been useless.

On an average, 9 tons of ore were treated every 24 hours ; the extraction of gold was 94 per cent., and the loss of mercury was insignificant.

A Study Of Amalgamation Methods.

Still later experiments led to the abandonment of the pre- liminary roasting of the ore ; and this resulted in the maximum gold-extraction of 95 per cent, of the assay-value.

IL The Patio Peocess.

Subsequently, I had occasion to occupy myself with the treatment of ores by the process. The ores consisted of a quartz mass, carrying a mixture in variable proportions of miargyrite, polybasite, silver-glance, pyrites, oxides of iron and manganese, and finally some native silver and calcite; zinc- blende was occasionally present.

The plant comprised 50 stamps of 850 lbs.; 30 arrastres; 4 mechanical washers; a patio (yard) with a capacity of 1360 tons; and corresponding apparatus, operated by abundant hydraulic power.

All the theories known to me regarding the reactions of the patio process are inconsistent with the phenomena observed in practice. As a consequence, the process, empirically, and more or less ignorantly, performed, has often been unfairly discarded by reason of failures due in reality not to its principles, but tO‘ its improper application.

Trederick Sonneschmid, who was sent to Mexico by Charles III. of Spain, with the idea of introducing there the German- methods of treating silver-ores, did not hesitate to report that the patio process was superior to the barrel-amalgamation de- veloped by Born and his successors.*

The theory of Sonneschmid, based upon twelve years of practice in Mexico, may be stated as follows rf

Sonneschmid’ s work, Trataio de Amalgamacion de Nueva Espafla, was pub- lished at Mexico in 1805. A German revised edition appeared at Gotha in 1810; and a Spanish edition (probably translated from the German one) was published by Bossange at Paris in 1825. From a copy of the last edition in the writer’s possession the opinion here quoted has been taken. In the Handbook of Metallurgy, translated by Prof. Henry Louis from the German of Prof. Carl Schnabel, Baron V. Born is credited with the introduction of the chloridizing roasting of silver-ores- at Vienna prior to 1786, in which year the Cazo process of amalgamation in cop- per vessels, subsequent to such a roasting, was introduced at Schemnitz, Hungary. The later development of the process at Freiberg, Saxony, by the substitution of amalgamation in horizontal, rotating wooden barrels, is ascribed to Gellert and Ruprecht, and it is declared that the first plant on a large scale using the Frei- berg ” process was erected in 1790 at the famous Halsbriicker works, at Freiberg.

t This summary is translated in substance from the German of Stolzel’s Metal- lurgiOf Brunswick, 1886, vol. ii., p. 1232.

A Study Of Amalgamation Methods.

48&

Sonneschmid assumed that the magistral in which he re- garded the copper sulphate as the chief operative reagent, lib- erated from the salt hydrochloric acid, which transformed to silver chloride the metallic or sulphuretted silver contained in the ores ; and that this silver chloride, in the presence of the excess of salt or hydrochloric acid, was reduced to the metallic state, and amalgamated with part of the mercury, giving up its hydrochloric acid to another part, to form mercury chloride. In addition to the mechanical loss of mercury in the process, there was thus a double chemical loss, due to the formation of mercury chloride, partly by the hydrochloric acid from the silver, and partly by the free hydrochloric acid in the mass.

This theory, as further developed, but not essentially changed, by Karsten, Rammelsberg and Eegnault, has been generally adopted. Up to a certain point, it explains the most important phenomena of the process.

The consumption of mercury in this process is generally measured in its proportion to the amount of silver obtained. A loss of 12 oz. of mercury per mark 8 oz.) of silver ex- tracted is generally considered good practice; and it is com- monly reckoned that of the 12 oz., 8 constitute the chemical loss, and 4 the mechanical. But when docile ores are intelli- gently and carefully treated, the loss of mercury may be less than 3.25 oz. per 8 oz. of silver — a fact which disproves the theory that the silver chloride is reduced wholly by the mer- cury ; since this loss is much smaller than the chemical equiv- alent involved in such a reaction.

Experiments made in 1878 at the Hacienda de Regla by my father, Eng’r Miguel Bustamente, showed that when the quan- tity of salt was augmented, and the treatment was slightly cold,’ the* total loss of mercury never exceeded 4 oz. per mark of silver extracted.

By another series of experiments, made to ascertain the in- fluence of the impurities of the sulphates of copper employed, he demonstrated that the English sulphate of copper, the purest used in Mexico, did not give as good results as the acid sul- phate of copper produced by the Mints in treating gold; and, finally, that the most effective and economical of all is the im- pure sulphate of copper, with a large quantity of iron, known as magistral,’’ and obtained by the roasting, of chalcopyrite.

A Study Op Amalgamation Methods.

These results, repeatedly eonfirmed by myself and others, likewise contradict the generally admitted principles and the- ories cited above.

The fact is, that some of the reactions pointed out by theoretical chemists take place ; but there are a multitude of other reactions which may and do also occur ; and the accessory ingredients of the ore have no less (and probably even more) influence in the patio than in other reduction-methods, because the latter may neutralize, by means of appropriate mixture of charges, some of the elements disturbing the desired reaction ; whereas in the patio no one has taken pains to make such mixtures, but all are content simply to divide the ores into ‘‘ docile and rebel- lious.’’

This is not surprising, since the greater number of plants are in the hands of ordinary amalgamating-workmen, ignorant of chemistry and mineralogy, and attached to the routine prac- tice of their fathers. Regular docimastic assays are rarely maintained, and still more rarely used with advantage as checks or guides in daily operations. The assays of the resi- due are carelessly made, and the treatment is generally guess- work. ifevertheless, the general results in treating docile ” ores are good. If the loss of mercury could always be kept down to 4 oz. per mark of silver obtained, and the extraction of sil- ver and gold up to 95 per cent, of the assay-value, and if this could be done with a larger proportion of the rebellious ” ores, the patio would be the ideal method for this country.

Some ten years ago, as a student of metallurgy, I presented, in my examination-thesis, a theory of the patio process which I wish now to re-state, without pretending that it solves the whole problem, but believing that it takes account of certain reactions, constantly occurring in the process, which have been overlooked hitherto, though they have a marked influence on the results of the treatment.

The first chemical operation upon “ docile ” ores is the salt- ing (msalrnorar) which consists in the addition of chloride of sodium (from 1.5 to 4 per cent, of the weight of the ore). The salt should be as pure as possible, as its quality has a marked influence on the consumption of sulphate of copper afterwards, and on the pureness of the silver, as well as on the time spent in making up the torta.

A Study Of Amalgamation Methods.

In the majority of cases I have found the use of an excess of nearly pure salt to result in greater silver-extraetioUj saving of time in the treatment, and notable diminution of the loss of mercury.

After the mixing (repaso), which may be done by peons, horses, rollers, pans, cradles, Archimedean screw, Chilean alaoran arrastres etc., comes the incorporation of the sul- phate of copper, or the magistral and then of the mercury'. The quantity of copper sulphate added (varying from 1.5 to 6 per cent, of the weight of the ore) depends upon many circum- stances, the principal being the dullness of the workmen and the good or bad quality of the impure sulphate employed. The quantity of mercury added is calculated to be 4 or 5 times the weight of silver expected to be obtained at the end of the operation.

The exact estimate of the quantity of sulphate of copper to be employed is of great importance. If too little is added, the treatment is checked ; the sulphate is converted into suboxide of copper; and the mercury, floured and oxidized, cannot be easily recovered by washing the torta without some injurious change in the compounds of silver.

If, on the other hand, the sulphate be in excess, the chloride reactions are very energetic, the mercury being rapidly con- verted into chloride (with liberation of 62.8 caL of heat); whereas, the formation of silver chloride (liberating only 29.2 cab) cannot take place. By subsequent reactions and outside influences, among which are the admitted effects of light and organic matter, a portion of the mercury is converted into an oxide, which is, like calomel, almost insoluble in the more or less concentrated solution of salt to which the principal reac- tions of the patio process are ascribed. A considerable loss of mercury is thus caused; and the compounds of silver are so transformed or rendered inert as to hinder their reduction, and produce the indications known to the workmen as those of

hot treatment.

The addition, as a remedy, of lime, ashes, precipitated copper, etc., cools the torta and destroys the calomel which may have been formed ; but it neither reduces the oxidized mercury nor modifies the passivity of the argentiferous compounds.

All the current theories of the patio attribute to cupric or

A STUDY OF AMALaAMATION METHODS.

to cuprous chloride the chloridization of the silver in the ore — the copper becoming a sulphide or sulph-antimonide, etc. But many trustworthy laboratory experiments have disproved this proposition. The test is not diflacult. Place pure pulver- ized argentite in a beaker ; add cupric chloride in more or less concentrated solution ; and the result is nil as could have been foretold from the principles of thermo-chemistry ; since the heat of formation of the chloride of silver is only 29.2 cal., while that of cupric chloride is much greater, namely, 71.2 cal. Add- ing chloride of sodium makes no difference, even after three months. But on the further addition of iron, or metallic zinc in shavings, an almost instantaneous reaction follows ; and the more intense the light during the experiment the more ener- getic will be this reaction. The black silver sulphide is changed to white. This reaction, no doubt, led Kroncke to employ the cuprous chloride in the method which bears his name. When an excess of iron or zinc is added, the energetic reaction rapidly deposits metallic silver — which is not surprising.

This experiment, studied in the light of Berthelof s thermo- chemical law, confirms the conclusion that the reaction is not a simple chloridization of the silver by the cuprous chloride (the formation heat of the latter being but 29.2, while that of the former is 62.2 cal.), but is in large part due to the metallic iron (or zinc). This conclusion can be further supported by similar experiment, in which cuprous silver is used instead of cupric chloride. The resulting reaction is very slow, and quite insignificant.

On the other hand, the hypothesis of the effective agency of the iron encounters at once the objection that, apart from American pan-amalgamation, the various silver-amalgamation processes do not involve a large consumption of iron; and, moreover, that they produce silver of much higher purity than that obtained in pans, which rarely assays as much as 0.750 fine. It is true that the crushing of ore with modern apparatus ex- poses it to a certain quantity of iron; that the animals which tramp the tortas are shod with iron ; but these factors cannot be significant ; since, both formerly and to this day, crushing in stone arrastres and the trampling of the torta by men are performed in remote mining districts of Mexico, with technical results not greatly, if at all, inferior to those of more modern practice.

A STUDY OU AMALGAMATIOl METHODS.

These objections led me to a series of laboratory experiments which, I think, demonstrate (1) the formation of ferric chloride (F 62016), the formation-heat of which, in solution, is 255.4 cal. ; (2) its subsequent reduction to a lower chloride, with liberation of chlorine, which, acting in the nascent state upon the com- pounds of silver, transforms them into chlorides ; (3) the reac- tion of these chlorides upon the hydrated oxides in the mixture of ore and reagents, and on the metallic iron, resulting in metallic silver with a new formation of chloride of iron, releas- ing oxygen, and probably affecting a partial regeneration of sulphate of copper ; (4) a new formation of chlorides of copper and a continuation of these reactions until the termination of the treatment. This is a resume of my theory of the process.

What is the j'ole of the copper in these reactions ? Its pres- ence is certainly indispensable. It has always been supposed to play the double roJe of the chlorination of the compounds of silver and its own sulphatization. As to the latter reaction: the formation-heat of the sulphate of silver is 3 cal. ; that of the sulphate of copper 20.8 cal. ; and that of the sulphate of iron, in the most unfavorable case, 41.6 cal. Undoubtedly, therefore, if iron oxide be present, this last reaction will be the one to take place. The state of division of this sulphate of iron; the liberation of oxygen in the formation of perchlo- rides from the oxides of iron contained in all ores ; the humid- ity ; the action of light and of atmospheric agents ; — all con- tribute to the formation of the sulphate of iron, liberating 94.4, and not to that of copper, liberating only 57 cal. This is only an application of the well-known principle of maximum work.’

Continuing: the formation-heat of the chloride of sodium (ISTaCl) is 58.5; that of sodium sulphide, dissolved, 186.8; that of iron sulphide 94.4; and that of copper sulphide 57 cal. The latter, therefore, will undoubtedly be most easily attacked by the chloride of sodium, since it requires the smallest number of calories to make it resign to the sodium its sulphuric acid, with formation, undoubtedly, of proto-chlorate of copper, which liberates 71.2 cal.

This simple comparison of the formation-heats shows at once the usefulness of the sulphate of copper in the patio process.

A Study Of Amalgamation Methods.

and also explains tlie small success of those experimenters who have, in practice, substituted sulphate of iron. The presence of copper is, moreover, of the utmost importance for the preser- vation of mercury in the metallic state, after the oxides of iron have been transformed into proto-chlorides ; the formation-heat of the corrosive sublimate being only 59.6 cal.

It remains to be explained why the “ magistral (i.e,, the sulphates of copper and iron obtained b}" the reverberatory roasting of chalcopyrite) yields, in this process, better results than the English sulphate of copper, chemically the purest in the market. This explanation is very simple, and completes my theory of the patio process.

All those who have practiced photograj>hy have witnessed the eftect of light in reducing the silver-salts and transforming the proto- into the per-salts of iron ; also the strong solvent action of iron perchloride upon the salts of silver — especially silver chloride, whether it has or has not been affected by light. The solvent power of iron perchloride upon silver chloride is greatly superior to that of the chloride of sodium, though the latter may be more generally known ; and it naturally facilitates and accelerates the reactions in the patio. In particular, the chlor- ination and consequent loss of mercury is diminished, for two reasons : (1) because the quantity of chloride of copper formed is made relatively small ; and (2) because the proto- and per- chloride of iron immediately formed, instead, from the sulphate of iron of the magistral directly aid in attacking the argentif- erous compounds.

The reduction to silver of the dissolved silver chloride may be effected either (1) through the precipitation of silver as an unstable oxide by the oxides of iron naturally existing or arti- ficially formed in the ore, or (2) by the conversion of silver proto-chloride into perchloride, leaving free silver, which amal- gamates with the mercury, eluding in this way further chlor- ination and solution. Consequently, mercury should not be chemically lost in this treatment. In fact, the necessary chem- ical loss has often been shown in practice to be imaginary. The mechanical loss is the only inevitable one.

The two principal signs observed in the usual tests which have hitherto served, and will doubtless continue to serve as a. practical guide in the operation of the patio process, confirm part of the theory here presented.

A Study Of Amalgamation Methods.

1. Tlie test of a “ cold ” iorta made immediately after the incorporation by trampling, shows mercury, sometimes in part more or less confluent, but usually in small drops, or in the exceedingly fine state of division (floured) which we call liz. E-ubbing this together, and then attempting to strain it by squeezing, we obtain scarcely any signs of amalgam. The mercury is very white, resembling its natural color, or tending more or less to a yellowish color on the surface, owing (as the experts say) to the formation of sub-oxide of copper. The of this oxide, covering the surface of the mercury, is undoubt- edly due to the decomposition of the chloride of copper by the oxides of iron in the ore ; and the quantity of chlorine thus liberated from the copper salt is not sufficient to form the needed amount of perchloride of iron, which, acting in the nascent state, and favored by the heat liberated in its own formation, is the true agent in the chloridization of the silver- compounds. Hence the coldness ” of the torta with the un- favorable conditions which that implies. This phenomenon led me to suspect for the first time the important part played in the patio process by the iron oxides and salts of the ore.

2. On the other hand, the torta is hot ’’ when an excess of sulphate of copper has been added. In this case, perchloride of iron is very rapidly formed, and tends to be reduced with similar rapidity to the proto-chloride, converting the mercury to calomel (HggClg), until the reaction provoked by the immoder- ate use of sulphate of copper has terminated. In this case, practically all the reagents employed are consumed in the chlorination of the mercury, without useful result. The greater part, if not the whole, of the iron oxides in the ores is changed to proto-chloride ; and if, after the over-heated torta has cooled, pure sulphate of copper be employed to continue the treatment, much difficulty will be experienced in recover- ing the conditions lost.

Inventors, reasoning upon the reactions of the Freiberg barrel-amalgamation, have proposed the use of metallic iron in the various phases of the patio process, as a means of minimiz- ing the loss of mercury. The main result of such a measure has been the requirement of a larger quantity of sulphate of copper, together with delay in the progress of the treatment. The reason is easily seen : the metallic iron precipitates metallic VOL. XXXII. — 29

A Study Of Amalgamation Methods.

copper, and this reaction cools the torta. The consnmptioii of mercury increases instead of diminishing.

In view of these facts and considerations, it is, in my judg- ment, the best practice to conduct the treatment of the torta mod- erately and with vigilance, and, upon the least sign of excessive heat, to apply the remedy at once, in the form of a quantity (calculated as exactly as possible) of lime, precipitated copper, or ashes, to forestall the effects of a “ hot ’’ torta upon the mer- cury.

As already observed, the proper amount of sulphate of cop- per required in this process for any particular ore should be as carefully determined, according to the law of chemical equiva- lents, as the amount and nature of flux required in a smelting process. And it follows that for this process, as for smelting, different ores might be so mixed, after proper analysis of each, as to diminish the necessary amount, or increase the effective- ness of the metallurgical reagents added. Empirical mixtures of docile and “ rebellious ores are known to have given excellent results in many Mexican localities ; and there is a wide and promising field for the thorough study and systematic application of this practice, which would raise it from the plane of local tradition or happy accident to that of definite purpose and fore-knowledge.

In this, as in other respects, the Mexican amalgamation- process has never had opportunity to exhibit its full technical and economical capacity. I firmly believe that it can success- fully compete with smelting, especially in a country like ours, in which, by reason of topographical conditions and the cost of fuel, freights will always be high.

With regard to methods for diminishing the loss of mercury and amalgam, I would here recall the experiments in connec- tion with the amalgamation of gold, described in the first part of this paper. I have similarly employed the electric current in connection with the jpatio process also — not to affect the treatment itself, but to join the metallic particles. The result was, as I had expected, the same as that which had been ac- complished with gold. The quantity of silver and mercury recovered was considerably increased ; and I succeeded in sav- ing 97 per cent, of the humid-assay value of silver with a loss of only 5.1 per cent of the mercury employed.

Distribution Or The Mineral Deposits Or Mexico. 497

The apparatus consisted of a series of amalgamated copper plates connected to the poles of the dynamo, and grouped in tension, so as to obtain, per sq. meter of surface, from one to two volts and 40 amperes of current. These plates were so suspended by means of the canals and inside of the drain of the 'patio in such a manner as to interrupt, to a certain extent, the free passage of the slimes and water, but without seriously hindering or complicating the washing of the torta. I am fully conscious that, after more than seven years spent in establishing facts, overcoming difficulties, and perfecting details, my work in the economic utilization of the facts and theories set forth bove is, like my attempt to state them here, still far from com- plete and satisfactory. hTevertheless, this paper, begun two years ago, is now published, in the hope that the suggestions and experiments of others may aid in the improvement and the due recognition of our Mexican patio process, so little understood, so often undervalued, and so worthy of a better fame and fate.

The Geographical and Geological Distribution of the Mineral Deposits of Mexico.

By Jose G, Aguilera, Mexico City.

(Mexican Meeting, November, 1901.)

With the imperfect knowledge that we have of the geology of the country in general, and of the numerous mining districts in particular, it is impossible to present an accurate idea of the geographical and geological distribution of the mineral depos- its of the Mexican Republic. But, notwithstanding this, it is olear that the deposits are concentrated in limited regions of the country, and that certain deposits are so closely associated :as to indicate, beyond .doubt, a genetic relationship. The mineral deposits are numerous, and the most of them are found in the western part of the country in a zone following n SE.-lsrW. direction from Oaxaca to Sonora. In the eastern

The first part of the original paper, dealing with the G-eographical features, has been omitted, — partly for lack of space, and for the further reason that in the Gl-eological portion the geographical location is mentioned in each case.

498 Distribution Of The Mineral Deposits Of Mexico.

portion of tlie Republic are some Trell-clefineci deposits extend- ing in an approximately IW.-SE. or iST.-S. line.

Geological Distribution,

The distribution of the minerals geographically is the result of the differences of geological structure in the two regions ; and it is important for us now to study the relations and de- pendence of the different deposits and the rocks constituting the surface. The systems of fractures in which the concentra- tion and deposition of minerals has taken place have well-de- fined relations with the orogenic movements of the country and, therefore, we may say that, as a consequence, in almost all of the mineral districts of the country there is a fracture- system with a course SE., which in some cases occurs

alone, but in the majority of cases is associated with a ISTE.— S W. or an E. and W. system ; but this does not explain why certain minerals are more abundant in one district than in others. There is, undoubtedly, a genetic reason why ores of different composition should be deposited in fissures, almost contemporaneous, formed in rocks of similar mineralogical composition or showing only trifling differences ; and the study of the genesis of mineral deposits, which has scarcely been be- gun in this country, will furnish an explanation not only of these phenomena of mineralization in contemporaneous fissures, and in rocks of similar chemical and mineralogical character, but also of the constant relation existing between the nature of the rocks and the nature of the deposits. In the naieantime, it is- wise to continue determining and recording these associations- for subsequent investigation as to their origin.

Graphite , — The graphite in the ancient rocks (some referred to the Azoic, and others undoubtedly metamorphic) appears as- scales in the mica-schists in the south of Oaxaca and Guerrero, near Jalapa; and in the metamorphic rocks of Molango, dis- trict of Jacala, Hidalgo. In pre-Cretaceous eruptive rocks, it is found in the granulite of Ceuta, near Tixtlalcingo, and of Jalapa, district of Allende, Guerrero ; also near Molango. At San Juan Coateeas Altas, district of Ejutla, Oaxaca, it occurs in small veins of granite and granulite. It also occurs in small quantities in the post-Cretaceous diorites (in all probability Eocene) of the Oampana hill, near Hermosillo. In the Upper

Distribution Of The Mineral Deposits Of Mexico. 499

Triassic of Sonora it is found in many places in the Taqui and Matape valleys as a metamorphic graphite formed from coal. It is more abundant and of a better quality in the districts of Hermosillo and Ures.

Stone- Goal — This is found in the Upper Triassic of Sonora and in deposits of the same age in the south of Puebla and northern Oaxaca; in the Upper Cretaceous of Chihuahua and Coahuila; in Eocene sedimentary deposits near Laredo and O-uerrero ; in Tamaulipas, and in the Miocene near Mier.

Hydrocarbons , — These deposits occur in formations ranging from the Upper Cretaceous to the Pliocene, along the coast of the Gulf of Mexico, from Tamaulipas to Tabasco. They consist of petroleum, grahamite and bitumen, the solids being formed by oxidation of liquid hydrocarbons. Petroleum is also found in Oaxaca on the Pacific coast, but we have no data concern- ing the geology of this region, in which granite, granulites and pegmatites appear to predominate.

Opal . — Opal is found in the rhyolites of the early Pliocene, in crevices and in fractures of contraction made while the rock was cooling, and filling small cavities and geodes.

The principal deposits are in the States of Queretaro, San Luis Potosi, Hidalgo, Michoacn, Chihuahua and Guanajuato. The opal is formed by the circulation of hot waters, which de- posit the hydrated silica in all the openings and passages through the rock-mass. Hyalite is very common in the Ter- tiary eruptive rocks, in the acidic as well as in those that are neutral or basic. Menilite occurs as concretions in the traver- tines deposited by hot springs.

Asbestos . — This mineral is found in the mica-schists in south- ern Puebla and northern Oaxaca and Guerrero. It occurs in thin irregular veins with great variations in quality, the fine fibrous asbestos being extremely scarce. In the same forma- tion are veinlets and threads of chrysotile or fibrous serpentine, which occur as a modification in the structure of the ser- pentine encountered in this region, and which, like the asbes- tos, appear to result from the alteration of the greenstones (hornblende-granite, granulite and diorite), as well as from the alteration layers of amphibolite intercalated between gneiss and mica-schists and of actinolite-veinlets existing in the region of the mica-schists and gneiss.

500 BiSTRIBtJriOlSf OB THE MINERAL BEPOSITS OF MEXICO.

Toi)az . — This mineral is found in the Pliocene rhyolites of San Luis, Guanajuato and Durango, and generally accompanies tlie tin minerals. At Cerro Mercado, Durango, however, topaz- is associated with iron-ores. The topaz, like the tin and its ac- companying wolfram, is found only in the rhyolite of the cen- tral part of the country, where this rock occurs in volcanic chimneys. It is not found in the rhyolites of the northern part of Mexico, which came through large fractures and spread over the more ancient eruptive rocks ; in these at this writing we know of no tin-veins, and naturally, therefore, no topaz.

BeryL — Beryl has been found in the mica-schists near Teju- pilco, hut not in tin-veins, as it is in Saxony and Bohemia, nor in granulite,* in which, in other countries, it is frequently present in small hexagonal crystals as an original constituent of the rock.

G-amet, — Garnet occurs in the mica-schists in the south of Puebla, northern part of Oaxaca and Guerrero, and the Altar district, Sonora, and in the granites that cut through the schists. It also occurs as a contact metamorphic mineral in the copper-deposits of the Cretaceous limestones, which are seen at the contact between the limestone and the diorites, granites, etc., in the mines of San Josfe, Tamaulipas; Pdnuco,. near the city of Romero Rubio, Coahuila ; San Juan de los- Llanos, Hacienda de la Cofradia, Puebla; the Eucarnacion mines, Hidalgo ; San Jose, near Zimapaa ; Cerro del Sacrificio,. Partido de Hombre de Dios, Durango ; Asientos mines, Aguas- calientes; mines of Cacoma, Jalisco; Rey and Reina mines,, Jalisco; Hornillas mines, Mapimi, Durango; San Juan de Guadalupe, Durango; Velardena mines, Cuencamfe, Durango; Sierra del Carrizal, Huevo Leon; Concepcion del Oro mineSy Mazapil, Zacatecas; Sierra de Baoz, Rio Ploxido, Chihuahuay and the Magistral mines, Chihuahua.

Garnet is found in metamorphosed Cretaceous limestones along diorite dikes, and in the proximity of gold- and silver- hearing deposits of iron-ore. Among these deposits may be mentioned those in the Mils near Xalostoc, Sierra de Tlaicay Morelos; Peras mines, Villa Alvarez district, Oaxaca; the

The author uses this word in the French sense, to denote a siliceous granite, ox aplite, and not the variety of metamorphic schist so-called by German geolo- gists. —S eoretaby.

Distribution Or The Mineral Deposits Oe Mexico. 501

Municipality of Zapotitlan, Tehuaean, Puebla ; near Lake Jaeo CMliuahua; Penoles mines, Durango; Siiltepec mines. State of Mexico ; Municipality of Ayala, Morelos ; and the mines of Guadalcazar, San Luis Potosi. G-arnet is also found in labra- dorite in tbe bills of San Cristobal, Pacbuca, Hidalgo.

Sulphur , — Sulphur is found in the solfataras of Popocatepetl, Ixtacihuatl, Oitlaltepec and the active volcano of Colima ; at the hill of Col near Guadalajara, and in the Tajimaroa volca- noes. Also, in very small quantities, in the Tertiary marls, probably at the base of the Pliocene, near Chila el Grande ; in the sedimentary gypsum-deposits, probably of late Eocene age, at Huamuxtitlan, Guerrero, and Silacayoapan, J uxtlahuaca, Oaxaca, in very small amounts. In the Cretaceous limestones of Mapimi, Durango, it is intimately related to the eruptive rocks, and owes its origin to hot waters circulating in and dis- solving the limestone, and forming cavities which are filled with sulphate of calcium; this is reduced by the organic re- mains in the limestone, and the result is the deposition of sul- phur. It is also found in mercury- and antimony-veins in Cretaceous limestone, as, for example, at Guadalcdzar, Hacienda de Bocas, Sierras de Catorce and Charcas, San Luis Potosi, and near Huitzuco, Guerrero, originating both from the reduc- tion of calcium sulphate (gypsum), and from the decomposition and reduction of the antimony sulphides. Notwithstanding that the deposits are in Cretaceous limestones, they are of a more recent age and almost all of them are related to the eruptive rhyolites ; we must therefore concede that the deposits are, in all probability, of middle Pliocene age.

Selenium , — Selenium and its various compounds occur in argentiferous veins in the hornblende-andesite of the Sierra de Guanajuato.

Tellurium , — The only known ore is the telluride of silver, hessite, found in some of the mines of Jalisco and Tepic, the veins of which are in Tertiary andesitic rocks.

Fluorine . — Fluorite is not found in the gangue of the tin- veins of Mexico, as is frequently the case in tin-deposits in the white mica-granite of other countries ; this constitutes a differ- ence between those veins and ours, which are always in rhyo- lites, but never in granite or granulite. This mineral is very rare and is regarded as a real curiosity in silver- veins ; those

502 Distribution Of The Mineral Deposits Op Mexico.

ill which, it does occur, like the veins of Cuchara, etc., and of Zacualpan, are rich in galena. It is found in the Madre vein, Gruanajuato, but in small amounts. The lead-veins of the Cre- taceous limestones very frequently, almost constantly, contain fluorite and barite together. The association of barite and fluorite in the lead-veins is analogous to that in the Triassic deposits of Central Europe.

Salt — Saline springs are found flowing from the Lower Cre- taceous slates in Tehuacan ; in the mica-schists of the districts of Chiautla and Acatlan, Puebla, and of the district of Hua- juapan, Oaxaca; in the marls and gravels of the Upper Cre- taceous of Coahuila, and in the Tertiary in some parts of Tamaulipas.

Barium , — Barite occurs in veins in the tourmaliniferous granites of Lower California, but at this writing we have not sufficient data to determine their age. On account of the chemical and mineralogical relations of barium and lead, which are more intimate than those which exist between barium and calcium, which are generally associated, it is very constantly found as a gangue associated with calcite in the lead-veins. Its presence is accidental in copper-ores, and it is very rarely found in silver-deposits; it is more frequent in lead and copper- silver deposits. As a proof of their chemical and mineralogical similarity we may mention the isomorphism of the sulphates, barite and anglesite, and of the carbonates, witherite and cerus- site. Barite is found as a gangue in some of the copper-de- posits in mica-schist and gneiss, containing chaleocite, chalcopy rite and blende, and, in the oxide zone, carrying oxides and carbonates of copper.

Strontium . — The only known deposits of celestite are in the slates and gravels of the Upper Jurassic and in the Lower Creta- ceous limestones on the eastern slopes of the Sierra de Oatorce. These are intimately mixed with small veins of porphyry. The matrix of the celestite deposits is calcite, without the anhydrite, gypsum or quartz, with which celestite occurs in the veins at Oondorcet, France.

Kaolin . — The majority of the kaolin-deposits in Mexico, known at this date, originated from the decomposition of the rhyolites ; such are the deposits at Zacualtipan, Hidalgo ; Ran- cho de Morga, Durango ; and San Ildefonso, district of Tula,

Bistribution Of The Mineral Deposits Op Mexico. 503

Hidalgo. The Santa Maria Coayuca deposit, near Chignahiia- pan, Puebla, is probably of the same origin.

These kaolin-deposits are of a diflerent age (Tertiary) from those of Europe, the latter being older, and derived from the decomposition of granulites. Foreign kaolins are associated with till-veins ; and this is also found to be true in Mexico, since our tin-veins are found in rhyolites and modern acid rocks, of which, as has been said, our kaolin is the decompo- sition-product. It is a curious fact that the deposits of kaolin in Mexico which have been mentioned lack fluorine, the min- eralizing agent of the veins in granulite; the presence of fluorine is recognized in the tin-veins only by the existence of topaz, which occasionally accompanies the cassiterite.

There are kaolin-deposits in the immediate vicinity of the villages of Teopantlan and Ahuatlan, in the quartz-gravels of the Upper Triassic. In the same class of deposits in Sonora the kaolin is in irregular beds, near the base of the strata, and at some places below and almost in contact with meta- morphosed anthracite. This kaolin seems to be due to the de- composition of the old granulite, above which rest the Triassic sediments. The granulites in Sonora cover a considerable area and show a well-marked metamorphic character ; the sub- divisions of the mass, in very regular heavy benches, give the rock a sedimentary aspect.

Iron . — In the south of Puebla iron-ore occurs in lenticular intercalations in gneiss and mica-schists, and consists of com- pact hematite with a small proportion of magnetite. Stratified deposits of hematite, occasionally accompanied by small amounts of siderite in the center of the hematite nodules, form work- able beds in the Upper Triassic deposits of Sonora, the southern part of Puebla, and the northern part of Oaxaca, where the deposits are more regular than in Puebla. Hematite occurs in the northern part of Guerrero, between OlinaH and Chilapa, in veins which cut the mica-schists. For lack of data the precise age of these deposits has not been determined, but they are probably Tertiary, for in the immediate vicinity of Chilapa the veins cut the Cretaceous limestones.

Contact deposits are very abundant, the ore being a compact hematite containing some magnetite, and sometimes accom- panied by pyrrhotite. These deposits are seen at the contact

504 Distribution Of The Mineral Deposits Of Mexico.

between the Cretaceous limestones and the diorites, quartz- diorites and micro-granulites, or in the zone close to the contact,, in which contact copper-deposits are frequently present. As an example, we may mention Cerro Mercado in Monclova, Coa- huila. As an example of hematite-veins in contact mth quartz- diorite, we may mention those of San Jose, Sierra de San Carlos, Tamaulipas. The veins of Encarnacion, Zimapan, Hi- dalgo, are also in the contact of limestone and quartz-diorite,. and are intimately bound with diorite ; the Xalostoc veins, Morelos, are near the contact of limestone with micro-granu- lite (?) ; those of Tlaxiaco, Oaxaca, are in the contact of diorite dikes and the Cretaceous formation ; the deposit of Eancho de Ayuquila, Puebla, are of hematite, and appear to be genetically related to the hornblende-andesite, since no diorite has been found in the immediate vicinity of the veins. The hematite veins which cut the Lower Cretaceous rocks at Eanchos del Espinal and Platanar, district of Temascaltepec, have a course NE.-SW., the same as the silver-veins of the district, and ap- pear to be dependent upon the andesites of the region. These deposits of iron are analogous to those of the Banat, Hungary and Servia, and appear, like those, to belong to the transi- tion period between the Miocene and Eocene. Probably the iron-deposits we are considering are of Eocene age, and per- haps some belong to the base of the Miocene. These deposits- resemble those of Hungary, Servia and the Banat, in that the matrix is garnetiferous, and some of our veins show copper minerals mixed with hematite. They also have some analogy with the iron-deposits of Hijni-Tagil, the only difference being in the age of the limestones and diorites; in Mexico the former- are Cretaceous and the latter Eocene, while in all probabil- ity both rocks at Hijni-Tagil are Paleozoic. Like the deposits of the Ural, most of the Mexican deposits are associated with copper-deposits, in close proximity, in which copper has been concentrated by secondary reactions, producing a separation of the two metals, which perhaps may still be associated in depth, and whose separation was due to a solution of the chalcopyrite and a deposition of the copper under the influence of the limestone.

Hematite accompanied by magnetite forms veins in the Pliocene rhyolites, and at Cerro Mercado, Lurango, it is ac-

Distribution Of The Mineral Deposits Of Mexico. 505

companied by apatite and topaz. Hematite accompanies cassit- erite in tbe tin-veins in rhyolite; and, finally, specular hema- tite is frequently found in the crevices and recesses of the ande- sitic rocks and granites.

Mrxnganese. — Manganese, which, in nature, is as widely dis- tributed as iron, though in less quantity, is generally associated with iron, and this association is so constant that there is scarcely any iron-deposit that does not contain manganese in greater or less quantity. However, in Mexico this association is not manifest, and scarcely any of the iron-deposits contain manganese; on the other hand, veins containing manganese only are not rare, as is the ease in other countries. Yeins of pyrolusite, psilomelane and wad are found in the Cretaceous limestones in the districts of Acatlan and Tepexi, in the southern part of Puebla. Irregular veins of psilomelane are known in the Cretaceous limestones in Sierrita de Metoche, near Cox- catMn, Guerrero. Manganese sulphide, alabandite, accompa- nies the silver-lead minerals of Sierrita de Tepeyahualco Puebla. The silicate and the oxides accompany the minerals of some of the silver-veins ; the former being found in the zone below the hydrostatic level ; the latter in the upper oxidized zone ; in passing from the silicates to the oxides, the carbonate, rhodochrosite, is found in the intermediate zone. As examples we may cite the veins of Pachuca and Eeal del Monte, Hi- dalgo, and the deposits of Tetela del Oro, Puebla.

Chromium , — Chromite is only known to come from two lo- calities in Puebla, — one being the district of Atlixco, near Matamoros, where it appears in veins cutting the Cretaceous limestone near its contact with the Tertiary eruptive rocks;, the other is near Chinantla, in veins which cut the mica-schist. These veins appear to be related to the andesites of the locality ; but in neither of these two places is there any certain knowl- edge that peridotites or serpentines exist, in which rocks chro- mium is found in other countries ; nor is it accompanied by opal, although chrysolite is found in some places near* the chromite deposits of Chinantla, but not in the same veins.

Nickel, — Fickel, like chromium, is very scarce in Mexico,, and it has only been found as an oxide or arsenide associated with iron in veins of Tertiary age, which cut the Cretaceous limestones in the Tolim&-n district, Quer5taro; these veins

506 Distrib0Tiok Op The Mineral Deposits Of Mexico.

are ricli, yielding per cent, nickel, and are associated with specular iron-ore. The pyrrhotites, which in other countries contain variable amounts of nickel, appear to be destitute of nickel in Mexico ; for none that have been analyzed contain any nickel.

Vanadium . — The mineral cuprodescloizite (or ramarite) forms veins at Charcas and Catorce; in the first-named place it is argentiferous. At Pozos, this mineral occurs in the Santa Brigida vein associated with the silver minerals. In Charcas, as well as Catorce and Pozos, the veins cut the middle Creta- ceous limestones and shales, and are considered as belonging to the Tertiary age. According to the best information, vanadium 'was first discovered in Mexico by Del Rio in the lead-bearing veins of Zimapan, which are of Tertiary age in Cretaceous limestones.

Tin . — The tin-deposits of Mexico are of two classes : Those of the Tertiary, and the alluvial placers of the Quaternary. The tin-veins of Europe are always directly related to or asso- ciated with granulite, in which the tin is frequently found as an impregnation, and the workable veins are in the contact of the crystalline schists and granulite. In the United States tin- deposits are found in crystalline rocks associated with greisen. The rocks of the Black Hills, South Dakota, in which tin has been found, are of Algonkian age. In Europe and the United States the older tin-veins show an association of minerals as characteristic as the association of the veins with the enclosinsr rocks, — the minerals containing combinations of boron, fluorine, tungsten, niobium, tantalum and other rare elements, while the enclosing granitic rocks and crystalline schists contain a lithium- mica. In Mexico the characteristic association of minerals and rocks is, so we might say, that of the latest tin-veins of the Tertiary, in which are found crystallized hematite, topaz, and in some cases wolframite and durangite. The associated rocks are Pliocene rhyolites and rhyolitic tufa.

The tin-veins of Mexico must be considered the most recent of all the Tertiary tin-deposits, since those of Tuscany and the Island of Elba are related to eruptive granulites, and those of Bolivia are in andesites or trachytes (?) carrying cassiterite together with sulphides of lead, copper, iron, silver, bismuth and zinc, but lacking tourmaline, topaz, apatite and fluorite.

Distribution Of The Mineral Deposits Of Mexico, 507

In San Luis Potosi bismuth is found in the tin-veins in such a manner that in some parts they are rich in tin, in others rich in bismuth. The largest vein is only 0.40 meter in width, and has been worked to a depth of only 40 meters. In this vein the tin is always accompanied by crystallized hematite and some topaz. The veins commonly have an E.-W. course. In the Sierras de San Francisco, Potrillos and Jaco, in Durango, the cassiterite is in small contraction-fissures made by the cooling of the rhyolites and rhyolitic tufa, and is accompanied by wolframite,, durangite and topaz. In none of the tin-veins have we any knowledge of tourmaline being found.

Tin-veins in rhyolite and rhyolitic tufa are found in the States of Hidalgo, Jalisco, Nuevo Leon, Puebla, Queretaro, Du- rango, Guanajuato, San Luis Potosi and Zacatecas, being more abundant in the last four.

Placer-deposits occur in the same States in the immediate vicinity of the veins, and are the ones that have generally been worked. They are rich and easy to work, as the mineral in the course of time has been concentrated by the streams of water.

Bismuth . — Besides the presence of bismuth in the tin-veins,, of which we have already spoken, it is found in small quanti- ties in the silver-veins in the andesites of Sierra de GuanajuatO' and Temascaltepec ; in lead-silver veins in the Cretaceous- limestones of Sierra del Carmen, Durango ; in the Zapuri and Balleza mines. Chihuahua, and in the Doctor and Yizarron mines, Queretaro. Small bismuth-veins are known in the rhy- olites of the Municipality of San Luis Potosi. It was in this- Municipality that Prof. Cabrera first discovered the bismuth minerals.

Molybdenum , — Molybdenite is present in scales in the gran- ulites near Temascaltepec, State of Mexico, and at some points- in Oaxaca; in Cretaceous limestone at Zimapdn, Hidalgo; Tetela del Oro, "Puebla; the Canton of Mascota, Jalisco; and as an accessory mineral in the silver-mines of Nopal and Santa Lies, Guanajuato.

Antimony , — Stibnite and the oxides of antimony constitute the deposits, which are of two classes, according to the char- acter of the enclosing rocks. The veins that are in the horn- blende- and pyroxene-andesites have a course NE.~SW. ; they

508 DISTEIBTJTION Oi' THE MINERAL DEPOSITS OF MEXICO.

contain quartz and stitnite, with a small amount of galena and hlende, very low in silver. The veins in the Cretaceous lime- stones and slates contain the oxides of antimony, — eervantite, stibieonite and valentinite, — whieh change to sulphides as depth is reached, and are very irregular. Antimony deposits occur in the Altar and Hermosillo districts, Sonora, and in the Sierras de Catoree and Charcas, San Luis Potosi. More com- monly antimony accompanies galena, and in the upper part of the lead-veins it forms pockets and bunches of stibnite. As examples of antimony-veins in Cretaceous limestone we may mention those of Mazapil and Zimaphn. Other antimony de- posits are accompanied by mercury ; these deposits, which are irregular and fill fractures and enlargements in Cretaceous limestones and slates, at Huitzuco, G-uerrero, and GuadaMzar, San Luis Potosi, contain stibnite, livingstonite, kermesite and barcenite, with a small amount of cinnabar, in a matrix of gyp- sum, together with sulphur formed by the reduction of anti- mony sulphides and calcium sulphate.

Antimony is also present in the silver-veins of Molango, Hidalgo, and Zacualpan, State of Mexico ; the stibnite accom- panies argentiferous tetrahedrite in the veins which cut the metamorphic mica-schists ; these veins seem to belong to the Tertiary age, but we have not sufficient data to confirm this opinion. At Rio Blanco, Quer6taro, in the Cretaceous lime- stone, are deposits of stibnite, pyrite and cinnabar, with a matrix of gypsum. At Zacualpan the stibnite in some places accompanies argentiferous sulphides, forming pockets consist- ing exclusively of stibnite. In the Triunfo and San Antonio mines. Lower California, berthierite, jamesonite and a little stibnite always accompany the silver compounds, and in the oxidized zone antimony oxides and the antimonate of lead (bindheimite) occur. As depth is reached stibnite, jamesonite, berthierite, with galena, pyrite, zinc-blende and tetrahedrite, are found. This same association is also observed in some of the veins in Sonora which, like the Triunfo deposits, are in granu- lites and diorites.

Mercury . — Cinnabar is found at many places in the Republic, in veinlets and in the form of very irregular deposits. In the Cretaceous limestones poor deposits of cinnabar are found with a matrix of caleite and gypsum, accompanied by kermesite

Bisteibution Of The Mineral Deposits Oe Mexico. 509

and some stibnite ; these deposits occur at Santa Rosa, Topo- yapulco, district of Tenancingo, city of Ocuilan ; also in Sierra de Encinillas, city of Santa Rosalia, Chihuahua, with oxides oi iron ; also in the mines of Targea and San Pedro de los Pozos, Ouanajuato. At San Antonio de Bocas, Charcas, Guadalczar, Partido de Venado, San Luis Potosi, and at Huitzuco, Gruerrero, the cinnabar occurs with antimony. In the Cretaceous lime- stones of the city of Teloloapan, Guerrero, are veins of cinna- bar, marcasite, kermesite and metacinnabarite with a calcite gangue.

Cinnabar occurs in hornblende-andesite in the Lorenzaua vein of the San Sebastian mine, and in andesite in the vicinity of Chiquistlan, Jalisco; the deposit at Huajes del Partido de Juchipila carries quartz and cinnabar, forming veins in ande- site. At Buenavista de Cuellar, district of Alarcon, Guerrero, cinnabar is found impregnating pyroxene-andesite. Deposits of cinnabar are known in rhyolites at Pinos and Pedregoso, Zacatecas; San Juan de la Chica, Guanajuato; Arroyo del Lobo, Municipality of Encarnacion de Diaz, Jalisco; Otinapa and Coneto, Durango, where it occurs in small veins accompa- nied by crystalline hematite ; and at Zacualtipdn, Durango.

Cinnabar is found in red conglomerates and volcanic gravels ranging in age from the Upper Miocene to the Pliocene. Such are those of Durango, Pedregal and Carro, San Luis Potosi; at San Cosme, Banon, Tequezquite and some points near Pinos, Zacatecas; at Cerro del Pinolillo, Cerro del Gigante and the mines of Centeno, Guanajuato ; and at Ajuchitln and Tlachapa, Guerrero.

Mercury is also present in some silver-veins. In the RTegril- las vein of the Pregones mine, lenses of almost pure cinnabar are encountered, together with galena, black blende, pyrites, chalcopyrite and argentite ; in the Cinco Senores vein, Pozos, Guanajuato, cinnabar also occurs, in connection with pyrite and chalcopyrite, — the other minerals being similar to those ol the Uegrillas vein. In Tepic and Jalisco cinnabar occurs asso- ciated with tetrahedrite in some of the silver-veins.

Copper , — A large number of the copper-deposits of Mexico are to be considered as contact- or segregation-deposits, since they sometimes occur in a zone of decomposed eruptive rocks,

510 Distribution Of The Mineral Deposits Of Mexico.

other times at the contact of eruptives and the Cretaceous- limestones and shales. Very often the main ore-shoots occur directly in the limestone and the other part in the contact of the two formations. In Cretaceous limestone near the eruptive rocks — diorite, quartz-diorite and hornblende-andesite — there exist deposits probably formed by the circulation of hot waters that followed the intrusion of these rocks, which are intimately related to the contact-deposits that lie directly between the two formations. The frequency with which these contact copper- deposits are accompanied by iron-deposits in the contact zone, sometimes for a distance of ten meters or more from the con- tact, is also to be noted. The association of iron and copper is more intimate in some of the iron-deposits in which copper is a component, thus supporting the theory that the channels of water-circulation have divided and produced two classes of deposits which may reunite in depth. The gangue in these contact-veins is quartz; the ores are chalcocite, chalcopyrite and bornite. These are generally accompanied by grossularite, iron garnet, wollastonite, tremolite and vesuvianite, all of which are products of alteration, formed at the expense of the Cretaceous limestone through the agency of heated waters. As an example of these deposits may be mentioned the San Jose mine, Sierra de San Carlos, Tamaulipas, where the copper minerals, as well as magnetite and hematite, are present in the contact between quartz-diorite and Middle Cretaceous limestone. The deposits on the Cofradia property at San Juan de los Llanos, Puebla, and at Sierra del Carrizal, in Uuevo Leon, are identical with the above. The copper-veins of Tatatila and Zomelahuacan, Veracruz; P4nuco, Coahuila; Kio Florido, Chihuahua, and San Josfe, Zimapan, Hidalgo, are also of the same type.

Copper in Eruptive Rocks. — -'Gold-bearing copper-veins occur in granulites (aplites) and Tertiary diorites in the Mina district, Guerrero, and at Cacoma and Ameca, Jalisco. They are com- posed of quartz with some zeolite at Cacoma. The oxidized zone is composed of gossan, copper carbonates, chrysocolla, native copper and gold ; in the sulphide zone chalcocite, chal- copyrite and pyrite are found. In the mines of Cerro Blanco, Ajuchitlan, Guerrero, there are veins in granite, with a quartz gangue, and a HW.-SE. course; they contain, in the oxidized

Distribution Op The Mineral Deposits Of Mexico. 511

zone, decomposed minerals (gossan), native gold, eerargyrite, copper carbonates and ebrysoeolla; as depth is reached, chal- eoeite, argentite and other silver sulphides occur. At Ojo Caliente, Zacatecas, the veins are in grannlite, and have a WhrW. course; part of them dip to the hTE. and others to the SW . The minerals of these deposits are oxides and carbonates of copper and iron ; as depth is reached sulphides of copper, iron and silver are met. At Inguar4n, bornite, chalcopyrite and ehalcoeite are found in deposits in granite and quartz- mica-diorite. Oxides occur in the upper zone. Deposits in hornblende-andesite (?) or diorite (?) occur at Tepezala, Aguas- calientes, and Agostadero, near Villa Garcia, Nuevo Leon, hav- ing a quartz matrix with bornite, chalcopyrite and garnet as a metamorphic mineral. In the oxide zone we find the carbon- ates and oxides of iron and copper and some chrysocolla. The deposits at the Palmarejo mines are in hornblende-andesite or trachy-andesite, have a NE.-SW. course, and contain quartz, tetrahedrite, chalcopyrite, pyrite, blende and silver sulphides.

In rhyolite, fissure-veins are known to occur in Chihuahua, and at Badiraguato, near Tedras; the deposits consist of car- bonates and oxides of iron and copper in the upper part, and ehalcoeite and chalcopyrite below. At the Carmen mine, Durango, the copper-deposits are in the contaefizone of the rhyolite and Cretaceous limestones, and, according to report, pass into the rhyolite. They contain ehalcoeite and chalco- pyrite with carbonates and some chrysocolla.

It is noteworthy that copper-deposits in Mexico occur in Tertiary acid rocks, such as granulites and rhyolites, contrary to the opinion of Fuchs, De Launay, Lapparent and others, who affirm that there exists an intimate dependence between copper-deposits and basic rocks in which, almost always, copper occurs in other countries. In Mexico it seems to be the neu- tral rocks which, either in themselves or at the contact with other rocks, carry the copper-deposits. The two eases we have cited of deposits in modern acid rocks are the only ones known up to the present time, aside from those that have been de- scribed in Japan. They are, therefore, of special scientific in- terest. Besides this exceptional association of copper with modern acid rocks, we have the occurrence of copper with

VOIi. XXXTT.— 30

512 DISTEIBUrrON of the MINEKAB deposits of MEXICO.

granulites and quartz-diorites, the former being acid, while the latter are considered neutral.

Ifative copper impregnates pyroxene-andesites (?) in the vicinity of Ooluean, Puebla, forming deposits which appear to represent the inelusion-type of De Launay.

In the conglomerates and red sandstones of Upper Miocene to Pliocene age a number of copper-deposits are known, some belonging to the bedded-vein type, while others are reputed to be sedimentary deposits, but probably are bedded-veins. To the former type belong the deposits of AjuchitUn, Guer- rero, and some in Michoacdn ; to the latter those of Boleo, Lower California, and some similar deposits lately discovered in Michoacan. Gray copper is one of the argentiferous min- erals almost always found in the veins of Lower California, Sonora, Sinaloa, Tepic, and some of the mines in Jalisco. Bor- nite occurs as the principal ore in the Guanacevi veins.

Lead . — The sulphide of zinc accompanies lead more gener- ally than does antimony, and, like it, forms in streaks or bunches in the lead-deposits, so that in some parts the deposits rvill not pay to work for lead on account of the relative abun- dance of blende. Uo exclusive deposits of zinc are known, and many of the lead-deposits are in fact mixtures of lead and zinc. Lead and zinc are so constantly associated in the gold- bearing deposits and in the silver-veins, in which galena and blende accompany the silver sulphides in depth, that the pres- ence of lead sulphide is a sure indication of zinc sulphide, and vice versa. The lead-deposits in the Cretaceous limestone and slates are generally related to eruptive rocks. The deposits in sedimentary rocks are more irregular and generally very poor in silver, while the deposits in the eruptive rocks are more regular and contain considerable amounts of silver.

Lead-Deposits in Sedimentary Rocks . — These are quite numer- ous, and often very irregular, being grottos or caverns in the sedimentary rocks filled with ore, which may perhaps be con- sidered as substitution deposits ; others occupy real fractures or veins in Cretaceous limestones and slates. At the Viejas and Villaldama mines, Uuevo Leon, irregular deposits fill cavi- ties in the Middle Cretaceous limestones, the ore consisting of oxides, carbonates and sulphides of lead and oxide of iron, the galena being below. The Iguana mines, Uuevo Leon, are

BISTRIBUTIOIy OF THE MINERAL DEPOSITS OF MEXICO. 513

bedded-veins of quartz carrying galena, pyrite and silver sul- phides in limestone near diorite. The veins and irregular deposits at Santa Rosa de Muzquiz, Sierra Mojada and Mula, Coahuila, are of both classes, the veins having a course NW.- SE., with a dip to the SW. or IJE. Among the irregular pocket-deposits may be mentioned Ifaiea and Las Adargas, Ohihuahua; Zimapan, Pechuga and Oardonal, and Lomo de Toro, Hidalgo; La Yelardena and Cuencame, Mapimi, Du- rango ; Cerralvo, Huevo Leon ; Caltepec and Santa Ana, Tehua- can, Puebla; Bramador, Jalisco; Sombrerete, Mazapil and Horia de Angeles, Zacatecas; and Huetamo, Michoacan.

The veins in the limestones and slates at Pregones mine have a course HW.-SE., dip to the HE., and are related to the Tertiary eruptive rocks, andesites and rhyolites. At the Hox- tepec mines the veins have a course HW.-SE., and contain galena, blende, pyrite, argentite and pyrargyrite. In the San Carlos mine, Tamaulipas, the veins have a course HW.-SE., and are intimately associated with the eruptive rocks, diorites and basalts. At the Pihuamo mines the veins have a course H. 80 E. with a dip of 65° to the HW. The gangue is cal cite, and the ore is silver-bearing galena and blende. These are contact veins between slates and limestones of the Lower Cre- taceous above and granulites beneath.

Lead -Veins in Eruptive Bocks . — eins occur in granite in the Desmoronado mine, and in hornblende-andesite at Ouale and Bramador, Jalisco, carrying galena in a quartz gangue. At Ojo Caliente, Zacatecas, the veins are in granulite; in these veins the relation between barite and the lead-bearing minerals is very curious, for in the veins where the lead enters in small proportions barite does not exist, or is only occasionally en- countered, while in the veins rich in lead the barite is abun- dant and constant. At Etzathin, Jalisco, there are lead-veins in Eocene diorites, the gangue being quartz and a small amount of calcite ; the galena is disseminated as nodules re- sembling small pebbles.

Silver . — The silver-deposits proper are found in eruptive rocks. A very few are found in sedimentary rocks, and in these the silver is accidental and variable in quantity. Where silver-veins occur in sedimentary rocks, it is evident that they are related to and dependent upon andesitic Tertiary eruptive rocks.

514 Distribution Of The Mineral Deposits Oe Mexico;

Silver hi Sedvmntary Rocks . — The silver-veins of the mines San Javier, Los Bronees and La Barranca, Sonora, are in sandstones and slates, and contain chalcocite, tetrahedrite, py- rite, chalcopyrite, blende, a small amount of galena, and com- plex sulphides of silver in a gangiie of quartz and calcite. The veins of the Urique mine, Chihuahua, are in Middle Cre- taceous limestones and slates. They have a K-S. strike and dip to the east. The vein-filling is quartz with calcite and gypsum, the mineralization of which is polybasite, pyrargyrite, argen- tite, pyrite, galena and blende. At Penon Blanco, Zacatecas, the veins cut Cretaceous limestone, with quartz, calcite and barite as a gangue ; they contain native gold and silver, car- bonates of copper, and silver chloride in the zone of oxidation. In the sulphide zone the following minerals are found : argen- tite, stephanite, polybasite, stromeyerite, pyrargyrite, galena, pyrite, chalcopyrite and arsenopyrite.

In the mines of Pregones, Taxeo and Noxtepec, Q-iierrero, the veins have a K’W.-SE. course and they dip, some to the ISTE. and some to the SW. Various oxides are in the zone of oxidation ; in the sulphide zone galena, pyrite, pyrargyrite and chalcopyrite occur. These veins are in Cretaceous limestone and are related to the eruptive rocks, — andesite and rhyolite.

The veins in the Sultepec mines are in the Lower Cretaceous shales (or slates) and have a course hTW.-SE., with a dip to the HE. The gangue is quartz, with marcasite, pyrite, galena and chalcopyrite as the dominant minerals. These are accompanied by argentite, pyrargyrite, miargyrite and blende. Some of the veins in the oxidized zone contain pyrolusite and gypsum. In the mine of Eresnillo, Zacatecas, the veins are in Cretaceous limestone in which there are dikes and intercalations of a gray, spongy rhyolite. The veins cut diorites and, according to Are- nas, spongy rhyolite (tufa) also.

Silver in JEruptive Rocks . — In the Oacachilas mines the veins are in granite or granulite, and consist of quartz with oxides of antimony and iron, chloride and bromide of silver, and carbonate of lead. Below these minerals, in the sulphide zone, may be found galena, tetrahedrite, sulphides of silver, berthierite, jamesonite, pyrite and blende. The same class of deposits is found in the diorites and granulites of San Anto- nio and El Triuiifo, Lower California, and in various mines

Disteibutio Of The Mineral Deposits Of Mexico. 515

of Sonora. In the Urique mines the veins are in Tertiary diorite, have a IsT.-S. course, and dip to the east; the gangue is quartz, and the ores are polybasite, miargyrite, pyrargyrite, pyrite and galena. In the oxidized zone, the oxides of iron and both the green and the blue carbonates of copper are found.

In the mines of Batopilas the veins are in diorite, generally with a IT.~S. course; they contain an abundance of native silver, argentite, pyrargyrite, miargyrite, proustite, pyrite and galena. In all the veins here the matrix is quartz and cal- cite. At Desmoronado the veins are in granite. At Copalquin they are in quartz-diorite, and those of Matehuala occur in Ter- tiary porphyry, probably Eocene. Some of the veins of Guana- juato are in diorite. At San Andres de la Sierra the deposits occur in a mica-quartz diorite with ophitic structure. The quartz gangue contains galena, blende, pyrite, pyrrhotite, arse- nopyrite and complex sulphides of silver. These veins are con- sidered by Tinoco as bedded-veins with a strike NW.-SE. and a dip to the HE. He classifies the country rock as hornblende- andesite. The vehis of Ixtapan del Oro and some of those at Sombrerete are in granulite.

The majority of the silver-veins of Mexico are in hornblende- and pyroxene-andesite. As examples of fissure-veins in erup- tive andesitic rocks, we may mention the following : In Zopi- lote, Tepic, the veins have a HW. course, and consist of quartz, blende and pyrite, sulphides of silver and small amounts of galena. At Topia the veins extend HE.-SW,, and contain galena, blende, a very small amount of pyrite, argentite and pyrargyrite with a gangue of quartz and calcite. At the mines of TecatitHn, Jalisco, the veins strike about H. 40® W., and dip 45® to the SW. The gangue is quartz with a little calcite, carrying sulphides and antimonides of silver, pyrite and chalco- pyrite. At Chinipas, Chihuahua, the veins occur in diorite and hornblende-andesite. The strike is HE., or in some cases HW. The vein-filling is quartz with argentite and pyrite, oxides of iron and dendritic manganese. At Ajijic, Jalisco, the veins are in hornblende-andesite, with an E.-W. strike ; there is an oxidized zone, and as depth is reached complex sulphides are encountered. At San Seba8ti4n and Los Eeyes, Jalisco, the veins have a quartz gangue with some calcite, complex sulphides and tellurides of silver and gold, a very little galena,

516 Disteibdtion Of The Misebal Deposits Op Mexico.

blende and pyrite. The veins of the Rosario mines and San Rieolas del Oro mine, Guerrero, are in hornblende-andesite ; their course is or in some cases ITE., and they contain

an oxidized zone. Below this is the sulphide zone, containing argentite, ruby-silver, pyrite and a small amount of chalcopy- rite. The gangue is quartz carrying gold. Some of the veins of Sierra de Tapalpa, San Jose del Amparo and Rosario, etc., have abT.-S. course and dip W. ; the gangue is quartz with some barite. In the oxidized zone they contain the carbonates of copper, and beneath this gray copper and stibnite occur. At Tlalchapa, Guerrero, the lodes have aNW.-SE. course, dipping to the RE. The vein-filling is quartz with argentite, pyrite and blende; occasionally the vein-quartz contains calcite, and, in addition to the minerals named above, galena and chalcopyrite. At the mines of Ohacoaeo, south of Fresnillo, the veins extend nearly north and south, and contain quartz with marcasite and pyrite. Some of the veins strike RE.-SW., and contain quartz, pyrite and sulphides of silver. The veins of Real del Espiritu Santo are found in augite-andesite.

In the pyroxene-andesites may be found the deposits of Pachuca, Real del Monte, El Chico, Tepenen6, Capula, Santa Rosa, in Hidalgo ; the mines of Santo Domingo, in Jalisco ; and some of the mines of Roxtepec, Guerrero. Among the veins in andesite may be mentioned those of the following mines : San Pablo Analco, which in the oxidized zone some- what resemble those of Pachuca ; the California mines in which part of the veins strike RE. and dip SE., and others have their course towards the R W. and dip RE. The gangue is quartz, carrying galena, pyrite, chalcopyrite and tetrahedrite. In the San Rafael mine, Jalisco, the veins have a course R. 25° W. In the mines of Hostotipaquillo the veins contain calcite and quartz with some rhodochrosite, a small amount of pyrite and black blende, argentite, galena, chalcocite, and chalcopyrite. In the oxidized zone they contain native silver, carbonates of copper and a very small amount of copper oxide. It would be tiresome to enumerate all the silver-veins of Mexico which occur in andesites, but as has been said, the majority of the silver-veins of the country are in various species of this rock, which Humboldt designated as metalliferous porphyries.

SUver in Trachyte and Rhyolite . — The veins of the Bolanos

BISTEIBUTIOiSr OF THE MINERAL DEPOSITS OF MEXICO. 517

mines, according to Burkart, are in trachyte; but it is proba- bly andesite covered by rhyolite. They have a IST.-S. course, -vvith deviations to- the E., and a dip to the W. In the oxide zone may be found minium, litharge, cerussite and small amounts of copper carbonates. Below these there are tetrahedrite, ruby- silver, galena and pyrite in a gangue of fluor-spar and quartz. At the Cabrera mines, in Tepic, the veins are encased in a more or less silicified rhyolite. The Coronilla mines, G-uerrero, are in rhyolite, and, according to Hoppenstedt, the veins have either an E.-W. or a IST.-S. course. They have a quartz gangue, and contain argentite, ruby-silver and pyrite. Oxides occur only in the upper part.

Silver in Red Conglomerates of the Tertiary, — The veins of the Tepantitlan mines, Guerrero, occur in these rocks ; they have a SE.-FW. course, and dip to the hTE. or to the SW. The gangue is quartz, containing argentite, ruby-silver, black blende, arsenopyrite and a small amount of chalcopyrite* In the Tlatlaya group, according to Hoppenstedt, the ores form contact-deposits between andesites and Tertiary volcanic con- glomerates. We may mention, furthermore, that the veins ot Guanajuato cut the bean-rock,’’ as the miners denominate the red conglomerate.”

Of the mines of Huautla, Malacate, Temascaltepec, Zacualpan, Guanajuato, Catorce, Zacatecas and El Carmen, in Sonora, very satisfactory descriptions have been given by Fuchs and De Launay in their Traiti des Giles MinSraux et MHallifires,

Gold. — Gold occurs in Mexico in exclusively auriferous, in auro-argentiferous and in cupro-argentiferous deposits. The first are in crystalline or metamorphic schists, pegmatites, granites, or diorites, and always in the proximity of recent eruptive rocks, such as andesites and rhyolites. The second are in trachytes and hornblende-andesites, which are closely related to the more recent rhyolites and basalts. And, finally, nearly all of the cupro-argentiferous ore-deposits are in the contact between the Cretaceous sedimentary rocks and the granites, diorites and Tertiary hornblende-andesites.

Gold in Granite, — The mines of Santa Clara, Real del Cas- tillo, El Alamo, Camalmahi and San Borja, Lower California, are in granite. In the Santa Clara mine the veins have a course from IJ. 20° W. to IS". 70° W.,with a dip to the SW.,

518 Distribution Of The Mineral Deposits Of Mexico.

or, in some cases, vertical ; they contain quartz and auriferous pyrite; the gossan carries some manganese oxide and native gold. The veins of Calamahi have a course IT. 35° W., and contain quartz, auriferous pyrite and some sulphides of copper. The zone of oxidation carries oxides and free gold. J udging from the amount of silver that accompanies the auriferous pyrite in the veins of the San Borja mines, they will probably change to silver-veins as depth is reached.

Gold in Pegmatite . — The numerous veins of Sierra Pinta del Bajio in the Altar district, Sonora, are in pegmatite which cuts crystalline schists. These veins appear to be related to the micaceous trachytes that skirt this mountain range. The veins carry quartz, pyrite, chalcopyrite, a very small amount of galena and blende, and contain free gold along the crests. The veins suddenly pinch out along both the course and dip, and present a well characterized lenticular formation resembling a string of heads.

Gold in GranuUte and Diorite . — The veins of the Tajitos, Eastrita and San Antonio mines, Sonora, contain quartz with free gold in the upper part. As depth is reached, pyrite, galena and blende are found. In some veins the last two are relatively abundant. Chalcopyrite and chalcocite occur in abundance in other veins. The veins of the Alameda mine, Opodepe, Sonora, are in granulite and strike ITE.-SW., with a dip to the SE. They contain native gold and silver, horn- silver and sulphides of silver. As depth is reached, the veins are more auro-argentiferous. They are in part covered by rhyolites. The veins of Barranca del Oro in Tepic and Par- naso, Pijintos and Cerro de San Antonio near Ameca, Jalisco, are in granulites, which are cut by dikes of diorite and horn- blende-andesite. The Barranca lodes have an east and west course, and contain quartz, pyrite and a little galena. The veins of Parnaso, Pijintos and Cerro de Antonio contain quartz, auriferous pyrite and sulphides of copper.

The mines of Peras and Santa Catarina Tlaxila, Oaxaca, and the Eepublic mine, Jalisco, are in diorites. The veins of the first are narrow, and contain quartz with auriferous marcasite, antimonial galena, and a small amount of blende and chal- copyrite.

The veins of Puerto del Oro, Guerrero, are known to be in

Distributiot Of The Mineral Deposits Of Mexico. 519

orystalline schists, and contain quartz, with pyrite, ehalco- pyrite, galena and blende. Those in the Eealito mines, Sin- aloa, contain quartz and auriferous pyrite. In the San Cristo- bal mine, between the districts of Tavares and Bravo, G-iier- rero, the veins have a JSTW.-SE. course ; dip to the SW. ; are in crystalline schists, but pass into andesites, and have a quartz gangue carrying argentite, pyrite, chalcopyrite and a small amount of galena, thus forming a transition from gold-bearing to silver-gold-bearing veins. In the Los Ocotes mine, District of Sultepec, State of Mexico, the veins in phyllite are inti- mately connected with pyroxene-andesite. Their course is ilW.-SE., with a dip to the SW. They contain quartz, a small amount of pyrite, argentite, arsenopyrite, and are rich in native arsenic.

The Cretaceous limestones of Campo Morado, G-uerrero, show Eocene granulitic dikes, with veins of contraction and cooling, carrying quartz and auriferous pyrite.

Gold-Silver Deposits. — In Andesites . — At the Taviches mines, Oaxaca, gold-silver deposits occur in hornblendic andesite. The veins have a 'S. 50° W. course; dip to the SW. ; and have a gangue of quartz and calcite, accompanied by some fluorite, gypsum and rhodochrosite. In the oxide zone, chloride and bromide of silver, free gold and native silver, are found. Pyrar- gyrite, miargyrite, proustite, polybasite, argentite, stibnite, py- rite, galena, chalcopyrite and a very small quantity of blende, are found in the sulphide zone.

In the Ixtlan mines, Tepic, the lodes have a course 50° W. and contain quartz, pyrargyrite, polybasite and a small amount of argentite. Native silver occurs in the oxide zone. At Cerro Colorado, Chihuahua, the veins form a network in altered hornblendic andesite. The gangue is calcite and quartz carrying free gold, pyrite, and chalcopyrite rich in sil- ver. At San Jos& de Gracia, N.-S. veins in hornblende-ande- eite carry auriferous pyrite, galena, blende, and silver sul- phides in a quartz gangue.

In JSornblende- Trachyte . — The vein at Mezquital del Oro has a NE.-SW". course and dips to the NW. It contains quartz, iron oxides and free gold in the upper part, and as d.epth is reached the quartz contains chalcopyrite, pyrite and sulphides of silver. This vein is very close to the rhyolites which cover the trachyte.

520 Histoeical Sketch Oe Mining Legislation In Mexico.

In Tlalpujalina gold-silver veins occur in Jurassic and Creta- ceous slates, related to Pliocene rhyolites which extend over the slates. Their course is K 25® W. and they dip to the NE. In the oxide zone there is free gold and native silver. The gangue is quartz which carries argentite, pyrite, pyrargyrite and polybasite, with a small amount of stibnite in some of the veins. At Mineral del Oro the poorer veins are in the slates* of the Jurassic and the better ones in the Cretaceous, and are related to the andesite flows which cover the sedimentary formation. These veins contain quartz with auriferous pyrite and carry free gold in the upper part.

Gold-Copper Deposits. — Contact-deposits between diorites and Cretaceous limestone are found at Zomelahuacan, Tatatila Veracruz, which are connected with pyroxene- and horn- blende-andesite; at the mines of San Jose, Tamaulipas, which are related to the basalt that covers and intersects the diorites ; at the Encarnacion mines, Hidalgo, which are associated with eruptive andesite; and at the Pdnuco mines, Coahuila, deposits- which are closely related to the eruptive hornblende-andesite.

Historical Sketch of Mining Legislation in Mexico.

Bt Eduardo Martinez Baca, Mexico City, Mexico.

(Mexican Meeting, October, 1901.)

Introduction.*

Although Mexico has always been justly considered by the- whole world essentially a mining country, this reputation is- due principally to the richness of the deposits which have been worked. In reality, the majority of the States have been little

Secretary’s Note. — This paper was prepared by the distinguished author at the request of the Department de Fomento. The greater part of the Introduc- tion, omitted in this translation, consists of general statements concerning the- importance of the mining industry throughout the world, and especially in the Eepublic of Mexico, not only as a direct producer of wealth, but also as a sup- port to other industries and a factor in the development of commerce, the in- crease of population and the progress of civilization.

Historical Sketch Oe Mining- Legislation In Mexico. 521

explored, and some, such as Guerrero and Chiapas, are almost entirely unknown. Innumerable denouncements for the ex- ploitation of mineral-deposits have been recorded since the colonial epoch, and innumerable mines have been (for reasons that it is unnecessary to enumerate in a work of this character) completely abandoned ; but enough has been done to demon- strate the considerable number and extent of mineral deposits in Mexico.

On account of the new character given to mining-properties by the law of 4th June, 1892 (now in force), and in com- pliance with the dispositions of Article 2 of the law of 6th June of the same year, miners had to present the titles to their properties for registry.

The area of mining-properties thus registered since the law of 1892 went into effect has been approximately 5400 hectaras. The number of titles issued by the Secretaria de Fomento, in accordance with this law, from the beginning of 1893 to De- cember, 1900, was 12,871, with an area of 130,078 hectaras.

To this number should be added, approximately, 48,692 hec- iaras which are exempt from taxation, because they are special concessions granted by the Secretaria de Fomento under the law of 6th June, 1887, and which were exempted by Article 4 of the law of 6th June, 1892. Thus there were, up to 31st De- cember, 1900, titles covering 184,170 hectaras. This number does not include the great zones, the exploration and exploita- tion of whose mineral resources was conceded by Congress to the Companies El Boleo ” and El Progreso,’ in Lower Cal- ifornia; Malatos,” in Sonora; “ Patopelas ’’ and Pinos Al- tos,’’ in Chihuahua.

It should be noted that ownership in many of the registered mines has been lost by failure to pay the annual tax, and also that not all of them are now worked; for under the law of 4th June, 1892, already mentioned, it is necessary only to pay the stipulated tax in order to retain the ownership, and, within the concessions mentioned above, work in all the mines is not obligatory.

According to data published by the Statistical Bureau of the Secretaria de Fomento for the year 1900, the number of laborers employed in the mines and reduction-works was as follows :

522 Hisiorical Sketch Oe Mining Legislation In Mexico.

Mines,

Keduction- Works,

Men.

. 99,396

. 27,777

Women.

1,288

Children.

5,852

1,339

Total.

106,536

29,192

Total, .

. 127,173

1,364

7,191

135,728

In tills number the other employes of the companies and the Other laborers, who, directly or indirectly, make their living from the mines, are not included.

In 1900, the exportation of metallic and non-nietallic mineral productions was |79,000,000, or 59 per cent of the total ex- ports ($134,000,000) in that year.

These data place beyond doubt the importance in Mexico of the mining industry.

The Q-eologieal Institute of Mexico, established by decree of 1888, the present director of which is the accomplished and learned engineer, D. Jose G. Aguilera, has made important studies of the geology of the country, which have not only made known many of the mineral deposits hidden in its soil, but have also furnished useful information to those engaged in their development.

By a natural process of evolution, mining legislation in Mexico has necessarily followed the industry to which it re- lates; but the transformation that has taken place in this legis- lation has certainly been more radical than that of the industry governed by it. From one extreme it has gone to the other. The former strict limitation of the jpertemncias which could be conceded, the obligation to employ a given number of workmen, the imminent danger of losing the property, either by failure to work, want of drainage, of ventilation, etc., have given place to entire freedom in the number of pertenencias which may be conceded to one person, and complete liberty of action to work or not to work the holdings, the owner being obliged only to respect the rights of his neighbor and to subject himself in the workings to the Eegulations governing the police and security of mines. The property thus acquired is now irrevocable and perpetual, and is not to be lost except in the case of failure to pay the tax established upon the unit of surface-measurement.

The purpose of this paper is to give an historical summary of mining legislation in Mexico. The endeavor will be made to give an idea as complete as possible of the regular and meth- odical advance which it has followed in its different transfer-

Historical Sketch Of Minikh Legislation In Aiexico. 523

mations, without going minutely into details, for a complete history of our legislation would fill volumes. Mention will be made, therefore, of the fundamental constituents of each of the difierent laws issued, except those which have a purely fiscal character, since they can be better reviewed elsewhere. Finally, these notices will be preceded by a few words on Mining in Mexico before the Conquest.

The points, therefore, which will be briefly touched upon in this very imperfect paper will be :

I. Brief Iotes on Mining in Mexico before the Conquest.

n. Mining Legislation during the Spanish Domination. The Mining Ordinances of 1783.

III. Mining Legislation of Mexico, before the Constitution of 1857, and the Legislation of the States, while they enacted Mining Laws.

IV. The Mining Code of 1884 and the Law of 1887.

V. The Law of 4th June, 1892, now in force, and Circulars relative thereto.

VI. Conclusion.

Brief Notes on Mining in Mexico before the Conquest

History has shown us that the working of deep mines was unknown to the Aztecs, and that if they did undertake some works on veins these were of very little depth. The reason is clear. Since they were ignorant of the manner of separating the useful and valuable part of the ore from the useless, it was utterly futile for them to extract the ore from the veins. They limited themselves, therefore, to exploiting gold and silver which they found in the native state, whether from the placers in the beds of rivers or from the outcropping of veins. It seems, also, that the working of these deposits did not consti- tute a true industry, and for this reason there were no laws governing it. Tributes payable to the kings must be in gold or silver, and, therefore, the tribute-payers were obliged to obtain these metals whence they could. Such a form of tribute- paying shows that the Aztecs understood very well the true value and significance of these metals.

By this means the kings or rulers were enabled to accumu- late great treasures, and history gives us an account of the

524 Historical Sketch Of Mining Legislation In Mexico.

imniense riches of the Emperor Moctezuma. Hernan Cortes, in a letter to the Eing of Spain, dated 30th October, 1520, in which he gives an account of the progress of the war of con- quest he had undertaken, says that in Tlaxcala* he found “jewels of gold and silver and stones and other jewels of feathers, as well made as could be found in any of the markets of the world. ”t He further says, in the same letter, that all the commissions sent by Moctezuma to dissuade him from going to Mexico made him rich presents of gold, and that when he reached the presence of Moctezuma, this monarch presented him with two collars, “ and from each collar hung eight Cama- rones of gold of great perfection, nearly a span long.”

Respecting the service of Moctezuma [continues the Conquistador] and the wonderful things of his greatness and state, there is so much to write that I declare to your Majesty that I do not know where to begin in order to tell you a part of them only; because, as I have said already, what more magnificent greatness could there he than that a barbarous lord like this should have counterfeits in gold and silver and stones and feathers, of everything under heaven found in his dominions, and, withal, so natural, and the objects of gold and silver so made that there is not a gold- or silver-smith in the world who could make them better. And as for the objects of stone, it is impossible for the judgment to understand with what instru- ments they were made so perfect, and those of feathers could not be made so mar- velously of wax nor in any embroidery.”!

The treasures accumulated by Hernan Cortes were great also, and, in order not to tire my readers with quotations, I shall merely call to mind the difficulties he experienced in his vain endeavors to save them in the memorable noche triste.’

It appears, also, that another of the reasons why the ancient inhabitants of this continent did not undertake the exploitation of the subsoil was the richness of the superficial deposits and the facility with which gold and silver could be extracted from them. Then, again, to a certain point, the application of these metals was limited to the payment of tribute and the fabrica- tion of certain ornaments, principally for the use of the nobles. Therefore, the exploitation of these deposits not being on a large scale, and being free, there was no need of legislation to govern it. It is true that the Indians did possess and work mines, but this was after they had seen the Spaniards working

Tlaxcala ineans the country of bread,” on account of the abundance of wheat and maize produced there.

f Letters of JD. Fernando CoriLs p. 78.

t Letters of D. Fernando OorUs p. 158.

Historical Sketch Of Mining Legislation In Mexico. 525

them and had learned the method of treatment employed to extract the useful material.*

Taxco (Guerrero), Pachuca (Hidalgo), Sultepee (Mexico), Tlalpujahua (Michoaean), Guanajuato and Zacatecas were the districts in which the Spaniards first began mining. When once mining had been introduced into the country, it became necessary to regulate it; and then came the first laws dictated by the Spanish government.

3Iining Legislation During the Spanish Dominion : The Mining Ordmanees of 1787.

The laws promulgated by the King of Spain, and observed all over his vast conquests, were naturally similar to those governing the same subjects in Spain.

Certain laws were issued even before the termination of the conquest, and scarcely had it been accomplished when many others followed. f

In the Code of the Indies (Recopilacion de Indiasf ordered published by Charles IL, are to be found various laws and dis- positions relating to mining. I shall cite the principal ones promulgated for the kingdoms of the Indies :

1519. Law 1st, Title xxii.. Book iv., orders that the gold of ransom received (rescate'J from the Indians in manufactured pieces, be assayed, certified, marked and charged with one-fifth to the crown -

1525. On the 24th November, in Toledo, the emperor Charles ordered in Law 2d, Title xix.. Book iv., that the miner and all

It is calculated that 80 per cent, of the silver produced in Mexico, at least till fifteen years ago, was obtained by the system called the “patio” process, in- vented by D. Bartolom de Medina in 1557, in the reduction-works called “Purlsima Chica,” in Pachuca.

t All historians consider the 13th August, 1521, as the end of the Conquest of Mexico. On that* date the troops of Hernn Cortes occupied the ‘ ‘ C-J-ran Tenox- titllin ” after a fiercely-contested battle, in which, it is said, a greater number of Indians were slain than of Jews in the destruction of Jerusalem by Vespasian. The letter of Herndn Cortes, giving an account of this victory, was received in Spain on the 1st March, 1522, and was printed in Sevilla the 8th November of the same year by Jacob Cromberger Aleman, as the first fruits of the art of printing in Sevilla and, perhaps, in all Spain, after the Oomplutensian Bible, published at the expense of the Grand Cardinal I). P. Francisco Xira4ne25 de Cisneros and celebrated as the first work printed in that country.

526 Histokioal Sketch Of Mininh Legislation In Mexico.

others who should gather gold should appear before the Grov> ernor and royal officials and, under oath, should show it and declare it in person at the proper office.

By Law 3d, Title xxii., Book iv., the quality of gold in plates and ingots was to be determined by assay, but if in manufac- tured jewelry the points ’’ should suffice.

1526. By Law 1st, Title v.. Book viii., the discovery and working of mines was permitted upon notice to the Governor and royal officers.

1530. Law 3d, Title xix., Book iv., orders that when any premium shall be promised to those who discover mines, only two-thirds of the premium shall be paid from the royal treasury, and the other one-third by the persons extracting the metal.

1535. Law 4th, Title xxii.. Book iv., orders that gold shall be melted without admixture of other metals and shall pass current for its value.

1551. The foregoing disposition was confirmed and added to by Law 2d, Title xxii.. Book iv., wherein it is ordered that gold and silver shall be assayed and melted and shall pass current for their value and fineness. Law 14, Title ix., Book iv., was of the greatest importance and significance. It declared that the Indians might hold and work mines of gold, silver and other metals ; and that no Spaniard or cacique should have a part in the mines discovered, held, or worked, by Indians.

1557. Law 7th, Title xxii., Book iv. hfo one shall melt down gold or silver taken for ransom, nor shall metal taken from the mines have other sign than the mark of the mine.

1559. By Law 3d, Title xx.. Book iv., the alcaldes, judges, and notaries of mines are prohibited from forming partnerships with the owners of mines or with their discoverers. By Law 16, Title xix., Book iv., the same rights are conceded to the Indians upon measuring their mines as to the Spaniards.

1568. Law 1st, Title xix., Book iv., amplifies the foregoing prohibition. It permits all Spaniards and Indians who are vassals of the king to discover and work mines, except magis- trates, governors, city officers, mayors and their lieutenants, alcaldes and notaries of mines, and that all who were especially prohibited and excluded from indicating, taking and staking out mines should keep the laws and ordinances of this province, this being confirmed by the king.

Histoeical Sketch Of Mining Legislation In Mexico. 527

1572. It is ordered in Law Ist, Title xx., Book iv., that favor he shown to miners and quicksilverers, and especially that no levy for debt (except debt t6 the Crown) shall be made on the slaves, tools and other articles necessary for the development, working and possession of their mines and for the persons working in them, and the levy is limited to the gold and silver extracted and obtained from the mines.

From 1575 to 1596 there were several laws of but little importance.

1601. By Law 13th, Title xix., Book iv., lazy Spaniards, half-breeds, free negroes and mulattos were obliged to hire themselves to work in the mines.

In 1602, Laws 1st, 2d, 4th and 5th, Title xix., Book iv., were promulgated. These ordain that the governors {alcaldes mayores) of mines must have ability and experience in the working of mines ; that imprisonment for debt of miners must be in the place and district in which the mine where they worked was situated, and that they may not be removed therefrom ; that the authorities shall take care that all materials received for the supply of the mines and reduction-works be sold at just prices, and that legal proceedings, in which miners are involved, shall receive the utmost despatch.

In the years 1603, 1609, 1610 and 1617, by Laws 7th, 4th, 10th, 9th and 12th of the Title and Book just cited, it is ordered that the scoria, silt and washings shall not be thrown away in the mines ; that the viceroys and governors shall en- courage the discovery and working of quicksilver-mines, mak- ing such concessions as they shall deem just to the discoverers and miners; that they shall decide in council whether it be better or not to tax the mills for grinding ore ; that they shall especially encourage the discovery, improvement, and working of mines ; and the sale of ores to those not owners of mines is prohibited under severe penalties. The same prohibition was extended to the alcaldes by Law 2d, Title xx.. Book iv., in

1629. Law 6th, Title xix., Book iv., orders the observance of the ordinances, adding that he who does not work his mine for four months shall lose it, and that it may then be denounced by anyone as abandoned. It is also forbidden to grant favors or extensions of the established period.

Vol. Xxxii.— 31

528 Histoeical Sketch Of Mining Legislation In Mexico.

1630. Law 5th of the same Title and Book commanded that the ordinances of mines and particular laws should be kept and observed. Among the latter is especially mentioned that which orders that a person working for another may not denounce a mine for himself, but only for his employer.

1633. In order that they should disclose their knowledge, premiums and exemptions were awarded by Law 15th to the Indians, who should make known mines the existence of which they had hitherto kept secret.

The “ Ordinances of Mines/’ to which Laws 5th and 6th, Title xix., Book iv., of the years 1629 and 1630, just men- tioned, refer, were promulgated in Madrid 18th March, 1563, by King Philip II. They contain seventy-eight ordinances and constitute Law 5th of the same Title and Book. The 22d of August, 1584, Philip II. had issued new ordinances in San Lorenzo, revoking only those parts of former ordinances which were inconsistent with them. These ordinances of 22d August, 1584, contain eighty-four chapters, and figure in an especial manner in Law 9th, Title xiii.. Book vi., of the Code of Castile.

These laws are commented upon by the notable jurist and commentator, D. Francisco Xavier de Gamboa, in his celebrated work, Commentaries on Mining Law. He gives them the name of Ordenanzas del Nuevo Cuaderno (Ordinances of the ISTew Pamphlet), to distinguish them from the former, which he calls Ordenanzas del Antiguo Gnaderno (of the Old Pamphlet). Under the Ordinances of the Xew Pamphlet, the radical pos- session of mines of gold, silver and other metals rested in the Sovereign, who exercised over them the unquestionable right of sovereignty [regalia) under a system called “ freedom of the mines.”

In addition to these laws, King Charles made a decree (ei- dula) which was published in Granada on August 22, 1627, ordering that, in the mines of Xew Spain, whoever wished might take out gold, silver and other metals without let or hin- drance. In Madrid, the 19th July, 1540, he issued another decree, ordaining that no execution against a mine should be issued against the tools used in working it, but only against the gold- and silver-products.

Still another decree, issued in Madrid 7th January, 1649, prohibited, under heavy penalty, those to whom Indians had been assigned from constraining them to work in the mines.

Historical Sketch Of Mikikg Leoislatiok Ik Mexico. 529

The Law of 28th February, 1550, given in Valladolid by the Queen Eegent, renewed to the Viceroy, D. Luis de Velasco, the instructions to visit the mines either in person or by deputy, in order to make sure that no violence was done the Indians working in them.

And the Law of 31st July, 1554, given from the same place, forbade lawyers to intervene in the business of mines.*

December 24, 1771. The Viceroy of ISTew Spain made a report to King Charles III. setting forth : that in order to improve the decadent state of mining, to radically and effectively {comodor- mmte) correct the obnoxious abuses introduced between the miners and operatives, and, in consequence, to avoid the recip- rocal complaints which resulted, he considered the formation of new general ordinances most opportune and urgent, and, at the same time, he proposed the means which he judged most conducive to serve as a sure guide to the successful execution of such an important .

After consultation with the Supreme Council of the Indies, and in accordance Tvith its recommendation presented 12th June, 1773, the King of Spain, by decree dated 20th July of the same year, authorized the formation of these ordinances. At the same time, he named a Board {Junta) composed of four ministers satisfactory to him; and, in compliance with their opinion, he gave orders to the Viceroy that, in the forma- tion of the new ordinances, he should procure the formation, arrangement and establishment of a formal and united mining corporation in imitation of the Consulates of Commerce.

On their part, the miners of Kew Spain presented a petition to the Viceroy, asking :

‘JSTot only to form themselves into a corporation like the Consulates, as had been commanded, but also to establish a bank de avios, to give impulse to the mines, to create a college of metallurgy, and that a new code of the Ordinances of Mines shall be drawn up-”

This manifesto having been approved by the King of Spain, the miners appointed their representative deputies, who, hav- ing met, proceeded to organize the miners into a corporation, to the designation of its offices, and the nomination of the in-

For more details, consult D. Santiigo Bamirez, Biqueza Minera de Mexico, 1884 , from which these notes have been taken.

530 Histoeical Sketch Of Mining Legislation In Mexico.

divicluals for officers, all of which was approved by the Vice- roy by decree of 21st July, 1777, and communicated to the King; and, by royal order of 27th December of the same year and of 20th January, 1778, it was commanded that if the newly- established corporation had not yet formed its ordinances, it should hasten that work ;

“ Whieli, entnisted to Sres. D. Joaquin de Velazquez Cardenas de Leon and D. Lucas de Lassaga, was concluded on 21st May of the same year, and remitted to Spain 26tli August, 1779, accompanied by tbe fiscal opinion {parecer) of tbe Beal Audiencia and tlie judgment of the Assessor-General of the Vice-Regency.”*

These documents were examined hy ministers of renowned probity, who presented their judgment, and, after careful con- sideration, the Ordinances of Mining were issued in Aranjuez on 22d May, 1783, and were published and solemnly proclaimed in Mexico, 15th January, 1784, by the Viceroy, D. Matias de Galvez.

Believing this document worthy of being known, I copy it here :

“ D. Matfas de Galvez, Lieutenant-General of the Royal Armies of H. M., Vice- roy, Governor and Captain-General of the Kingdom of New Spain, Presi- dent of the Real Audiencia, General Superintendent of the Royal Treasury and Department of Tobacco, etc.

With the most important object, meditated upon many years before being ar- ranged, of encouraging and giving due heed to the interest and improvement of the exceedingly rich and innumerable mines of New Spain, the indefatigable care and solicitude of the King, our Lord (whom may God guard), has been pleased to send me hy this last post the new and appropriate Royal Ordinances for the rule and government of the important Corporation of Mining of these Kingdoms, and his Royal Tribunal-General, comprised in the Royal decree dated from Aranjuez 22d Mav, 1783, in which His Majesty, stating first the proceeding which preceded the considerations of this .most weighty matter and everything else which occurred during them, includes all the ordinances in 19 Titles, and concludes as follows :

‘‘Lastly, I order and command the Governor and all those of my Supreme Council and Chamber of Indies, Royal Audiencias and Tribunals of New Spain, its Viceroy, Captains or Commandants-General, Governors, Intendants, Ministers, Judges, and other persons who may or could be affected, in all or in part, by the dispositions and proscriptions of said ordinances, that they govern themselves strictly by them, making effectual and observing with the greatest exactness that which corresponds to each one, holding everything contained in them as a perpet- ual and firm Law and Statute, keeping them and causing them to be observed in- violable, notwithstanding whatever other Laws, Ordinances, Establishments, cus- toms or practices there might be to the contrary, for, in so far as there should be

Op, cit, p. 733.

Histokical Sketch Of Mining Legislation In Mexico. 531

any sucli, I hereby expressly revoke them and desire that they be of no effect ; forbidding, as I do, that they shall be interpreted or varied in any manner, because it is my will that they be precisely according to the letter and express meaning. And, so also, I command most strictly all Tribunals, Magistrates and Courts, included in this and the foregoing article, that they contribute to and as- sist efficaciously the punctual obedience to every disposition and command in these, My "Royal Ordinances, avoiding, by every means possible, all competitions and embarrassments which will incur my Royal displeasure as prejudicial to the Administration of J ustice and to the good government, quiet, and happiness of the important Corporation of Mining of these. My Dominions. To which end I have ordered the despatch of the present decree, signed by my Royal hand, sealed with my secret seal, and countersigned by my undersigned Secretary of State and of the Universal Office {Desqfocho) of the Indies. Of this, their Comptroller-Gen- eraPs office will take note, as also the Corresponding Offices of New Spain.

‘‘Given in Aranjuez on the 22d of May, 1783.

“ I, The Kikg . — Josef de Galvez , — It is a copy of the original. Josef de Gdlvez — marked with a flourish.

“ And having remitted the printed copies which came to the said Royal Tribu- nal-General with the official note of 19th December of the past year, 1783, it begged that I should please order the due obedience and compliance with the said Royal Decree and Ordinances in accordance with their contents. So I immediately de- creed in conformity with the previously solicited opinion and petition of the Fiscal, who, among other things, says, as follows :

‘ ‘ Lastly, it is proper that you should make a Proclamation that should be ad- dressed, without delay, to all the Governors, Magistrates, Mayors and other Justices of these Kingdoms, in which shall be made known to all the inhabitants the context of the Royal Decree of 22d May of this year, and that Your Excel- lency should command them most strictly that they contribute to and aid effica- ciously the compliance with its dispositions and commands, and with all and every one of the Ordinances in their 19 Titles ; it being well understood that, although, at present, no copies are sent, because there are not enough at hand, this is no reason why they should be unmindful of their dispositions, which will be communicated opportunely, and, in the meantime, will be made known in spe' cial cases by the respective territorial Deputations.

“ Mexico, 23d December, 1783. — Posada,

“And, in consequence, that it may reach the notice of all, I order that it be promulgated and published by Proclamation (Bando) in this Capital and in all the other cities, towns and villages of these dominions, and in all the mining dis- tricts, in order that the said Royal Ordinances may be observed, kept and com- plied with due punctuality as fixed Laws and Statutes belonging and peculiar to mining, printed copies of which have been distributed to the Tribunals and Ministers of this City and sent out to the principal mining places, and as soon as a sufficient number are received copies will be sent to all tjjie others.

“And that ihe Royal Tribunal-General of this important body be held and con- sidered by all the others with the respect conducive and proper to the ultimate ends with which the Sovereign dignity has endowed it ; and, moreover, that it enjoy and use all the jurisdiction, rights and powers that have been conceded to it in said Royal ordinances, and that it be respected and obeyed by all whom, in any manner whatsoever, it may or can effect, under the grave penalties incurred by those disobedient to their Judges and transgressors of the laws and sovereign orders of the King.

“ And, to this effect, copies of this proclamation are sent, as there have been of

532 Histokical Sketch Ok Mining Legislation In Mbxico-

ordinances, to tLe Presidency and Kegency of the Poyal Audiencia of Guadala- jara and to the Commanding-General of the interior provinces for their instruction and govemmeni, while giving the necessary orders for their publication.

Given in Mexico, l-Sth January, 1784. Matias de Galvez.

‘ ‘ By order of his Excellency.”

These ordinances won the admiration and the enthusiastic eulogies of entire generations. As the renowned advocate, D. Ignacio L. Yallarta, says, they were ahead of their times. It can he said that they were in force for more than a century, since, in reality, the principles established in those ordinances — particularly those relating to the acquisition and conserva- tion (retention) of mining property — continued in existence till 1892. neither in the codes of Durango and Hidalgo, the only States which issued special legislation on mining during the period in which the States possessed this power, nor in the Mining Code of 1884, promulgated to unify the legislation on mining in the whole Republic, were their authors free from the inspiration of the principles established by the Ordinances of

According to them, the Paramount Dominion of the mines resided in the Royal Crown which, without separating them from its Royal Patrimony, conceded them in property and pos- session, on the condition that the miner should contribute to the Royal Treasury a stipulated portion of the metals, and that he should not suspend work in the mines for more than a stipulated time, under pain of losing the property if he failed to comply with any of these requisites, in which case the mine could he adjudged to any other person.

There were various considerations which governed the grant- ing of mining claims, and which had to be taken into account when the denouncement was presented : whether it was pre- sented by an individual only or by a company ; whether or not by the discoverer, and in case that he was the discoverer, whether the discovery referred to a new mining district or to a new vein in a district already known.

In the first case, three continuous or interrupted (alternate) pertenencias on the vein that he should designate, and one more on each of the other veins discovered, were conceded to the discoverer if he should designate all these within the term of ten days ; in the second case only two perfeneneias were con-

Historical Sketch Of Mikikh Legislation In Mexico. 533

ceded to the discoverer and if the denouncement was made on a vein and in a district already known, the denouncer was not considered a discoverer and was conceded only one jperie-

neneicL

If the denouncement was made hy a company, it could cover four continuous 'pertenendas without preventing the attainment also, in ease of discovery, of the same rights as were accorded by this title.

The dimensions of the pertenendas were, treating of veins, 200 varas (167.60 m.) on the strike of the vein, measuring horizontally, and at right angles the width varied according to the inclination or dip of the vein from 112J varas (94.28 m.) to 200 varas. In placers, pockets (rebosaderos) or other irregu- lar deposits of gold and silver, the territorial Deputations of mining regulated the dimensions of the perteneneias taking into account the extension and richness of the deposits and the number of denouncers, being required to report to the Royal Tribunal-Q-eneral of Mexico, which should take final action.

The miner could work not only within the limits of his own vertenenda, but also could enter those adjacent with vein in hand,” dividing with them the ores that he should take out.

Unnaturalized foreigners were prohibited from acquiring and working mines. Members of religious bodies of both sexes were also prohibited from denouncing or acquiring, in any manner, either for themselves or for their convents or communities, any mine; and those of which they should be possessed were required to be sold within the term of six months. Neither could mines be acquired by the governors, intendants, ‘ magistrates, alcaldes, mayors, or by other jus- bices of mining places and “ camps,” nor yet by the notaries in them; but they could hold mines in territory separate from that of their jurisdiction. The employes of mining enterprises could not denounce, nor in any manner acquire, mines within a zone of 1000 varas on all sides of the company's property, unless it were for the company or for the owner of the mine where they were employed.

Mining property was lost by failing to work the mine four continuous months with four operatives, or eight months in- terruptedly in a year, counted from the day of obtaining pos- session. If the pillars, stulls or safety-piers were removed

534 Historical Sketch Of Minihc Legislation In Mexico.

from tlie mines or weakened, the operative who did this was punished with ten years of prison ; the same punishment was in- flicted upon a mine-guard who permitted it ; and the owner of the mine lost the property, together with one-half his goods, and was, moreover, excluded forever from following the business of mining.

The Tribunal, called “The Royal Tribunal-General of the Important Corporation of Mining of R'ew Spain,’ was estab- lished by the dispositions of this same ordinance. It was com- posed of a president, a director-general and three deputies- general. These duties must invariably fall upon practical, intelligent and expert miners, who had had more than ten years’ experience in the mines.

The President and Director-General were for life. The deputies were chosen at an election held every three years in the City of Mexico by representatives of all the ‘Reales de. Minas/' provided with adequate authority by all the miners. By Real de Mims was understood those places in which there existed a town already established with church, vicar or curate, Royal Judge .(Judge of Mines) and Deputies of Mining, six mines in operation and four reduction-works. These were also Deputations of Mining in the Mining Districts, which were called Territorial Deputations. They were composed of two Proprietary Deputies and four alternates, and were renewed by halves every two years. The Deputies of Mining were named from among the inscribed (registered) miners. These ivere only those who had wmrked on their own account one or more mines for more than one year. Those who gave funds to work mines (Aviadores), ore-buyers [Moguileros) and owners of Re- duction-Works also took part in the elections, but each two were allowed only one vote, and they could not be Deputies unless they were also miners. The Royal Tribunal-General of Mining had cognizance of all Gubernatorial, Directive and Economic questions concerning mines. It could also take cog- nizance of cases in which were involved questions relating to discoveries, denouncements and measurements of pertenendas, to drainage, desertions and depillaration of mines, to the furnishing of money to work mines {Avio) or purchase ores of silver, gold, lead, copper, to smelting charges, etc., but it could only exercise this jurisdiction of contested cases within, a radius of twenty-five leagues from the City of Mexico.

Historical Sketch Of Mixing Legislation In Mexico. 535

The Royal Tribmial could have an attorney in the city and at the Court of Madrid, who should represent it in all matters relating to mines of which it had cognizance and which should come before that court.

The Territorial Deputations were subject to the Royal Trib- unal. They were charged with taking cognizance of and giving legal course to denouncements of mines, and with vigi- lance for exact compliance with the ordinances in working them ; they could also take cognizance in contested matters, of the same cases as those assigned to the Royal Tribunal and entirely independent of it, outside its territory, as above desig- nated.

The sentences in mining questions were summary ; no de- lays or writs were admitted. In every dispute J:he parties were summoned to appear personally in order to end the dif- ference, and, if this were not accomplished, their written peti- tions were admitted, if they were not disposed, ordered or eigned by lawyers.

The parties could appeal from the sentence pronounced, if the amount in dispute exceeded |400 ; if less, no appeal was admitted, but the sentence pronounced by the Royal Tribunal or by the Territorial Deputations was executed.

The appeals had to be presented within three days of notifi- cation of the rendition of judgment.

Appeals from the Royal Tribunal were presented before the Court of Appeals {Alzadas) established in Mexico, and com- posed of a judge appointed by the Viceroy, the Direetor- 'General of Mining and another miner; those from the Terri- torial Deputations before the Court of Appeals ordered to be established in Guadalajara, whenever such Deputation was within a zone of twenty leagues from Guadalajara, Avhich was assigned as the Jurisdiction of this Court.

In each province there was also a Court of Alzadas to hear the appeals from the other Deputations, They were composed of the judge of highest authority in the province, appointed by the King and two miners.

Even by an inattentive reading of the Ordinances of 1783, their dominant idea is understood. It was to encourage and stimulate the exploitation of mines by all possible and adequate means. Work was obligatory. Trials and judgments were

536 Historical Sketch Of Mihog Legislation In Mexico.

brief. Imprisonment for debt was in tbe mines themselves, so that the debtor could work in them. All who dedicated them- selves to the working of mines were conceded the same rights and privileges as the miners of Castile and Peru. The privi- lege of nobility was conceded to the engineers of mines, so that they should be looked upon and attended to with every distinction. A special fund was formed for the creation and maintenance of a college of mining, dedicated exclusively to the education of engineers of mines.*

Finally, they go so far as to order the Judges and Deputies of the mining towns and precincts to counsel, and, if neces- sary, admonish {amonestar) the miners, and especially those whose mines were en honanza to the end that they should not squander their riches and spend them foolishly, lest their mines fall into the hands of those who were not miners.

Before bringing to a close this part of my already tedious paper, I cannot refrain from giving extracts from two Articles, one of which refers to the education and teaching of the youths (young men) destined for the mines, and the other which re- commends vigilance to the miners lest they squander their funds.

The first says :

“Considering that industry makes the ordinary {medianas) and even the commonest productions of nature useful for human life, while, on the contrary, without it, even the advantages and benefits which ought to be expected from the most subordinate natural riches generally become useless and disappear, I wish, and order, that the industry applicable to mining, and which is worthy of such a place therein, be excited, encouraged and fostered, especial care and attention being given to observe the use and effect of the machines, operations and methods that are at present employed in it, so that aU which shall be found truly useful and perfect of their kind may be preserved in all their integrity ; that they may not insensibly lose and diminish their worth, as has happened and happens ; and that those things which, compared with the best and surest rules, are found to be worth mending and reforming, may be brought to really greater perfection and more effective practice, without hampering the progress of the industry by ancient prejudices cramped in caprice and ignorance, nor yet having its just preservation- endangered by poorly-founded novelties.”

The second says :

“Being so notorious and pernicious, the immoderate freedom with which the miners are accustomed to spend their funds, consuming them with the greatest

The College of Mining was inaugurated January, 1792, with an endowment of $250,000.

Histouical Sketch Op Leoislatioh Ijt Mexico. 537

imprudence and disorder until tliey and their families are soon left in misery and their means in the hands of others v.dio do not invest them in mine-working, it is my sovereign will, and I order the Judges and Deputies of mining towns and camps to counsel, and, when necessary, to admonish the miners, especially those whose mines are en Bonanza not to consume their wealth in extrava- gant and vicious expenditures, nor in vain liberality ; and when this is not suffi- cient for the correction of these abuses, that they report them to the Eoyal Tribunal-General of Mining, in order that, having carefully judged the reproach- able conduct of the miner under consideration, it may appoint a trustee for him or in some other manner provide for the preservation of his goods as for a veri- table spendthrift {verdadero prodigo),’’

Various isolated laws were given after the Ordinances of Mining were issued.

Manufactured articles of silver were subjected to the quinio (fifth) ; the provision of salt in mining camps was ordered ; the operatives in the mines were exempted from military service; the utensils, provisions (abastos) dry goods and articles which were introduced into and consumed in the mining camps were freed from the duties of aleahala (octroi) as were also the other articles necessary for the work of the miners, which were called “ the eleven free species (especies),

Premiums were established for the inventors of metallurgical processes for ores ; the price at which powder was to he sold to the miners was fixed, and the penalty of confiscation was im- posed upon all metals which were found without the Treasury- mark of their origin.

Of all the later dispositions, those which had the most inti- mate relation with the ordinances were the Law of 18th July, 1789, repealing Art. 18, Title i., of the Ordinances ; that of 31st May, 1790, which declared that, in default of the five pro- prietary members of which the Tribunal should be composed, when the General Junta was holding meetings, the precise num- ber of four votes — of the Director, of two Deputies and of the Consultor — should concur in them, that of 12th February, 1797, in which Art. 2 of Title hi., of the Ordinances was repealed, and Art. 4 of the same Title amplified, and that of 10th June, of the same year, restricting to the Tribunal the power of discharging certain employes.

The 26th of January and 2d of February, 1811, the General Cortes and the Supreme Council of the Eegency conceded the acquisition and full dominion of quicksilver-mines, free com- merce in their products and exemption from all kinds of duties,

538 Historical Sketch Of Mining Legislation In Mexico.

offering premiums to explorers and to inventors or perfectors of metallurgical processes.

The last Eoyal order issued by the Colonial Government was that of 19th December, 1818, in which the King declared that quicksilver intended for the reduction of ores ought not to pay eventual duties of aleabala {octroi) or any other tax.

Such, in rough outline, is the history of mining legislation in Mexico during the Spanish domination.

3Iwwq Legislation of Mexico before the Constitution of 1857 and the Legislation of the Several States lohile They Enacted 3Iinmg Laws,

The Independence of Mexico having been consummated 27th September, 1821, the expulsion, in 1827, of the Spaniards, in whose hands were nearly all the principal mining enterprises, the truly difficult conditions in which the country found itself in consequence of the sanguinary and prolonged war of Inde- pendence, and the imperative need of the newly-established government to fix its attention preferably on other matters, were powerful reasons why mining in Mexico should have been plunged into a state of almost complete paralysis.

The Ordinances of Mining continued in force throughout the country, as there had been no order suppressing them; and as the newly-established Government could not ignore such an important industry, as soon as more pressing demands for attention permitted, it turned to the riiatter and endeavored to remedy the bad conditions in which it was found, effecting the dispositions that appeared most conducive to that end.

The 20th February, 1822, the Junta Provisional issued a de- cree which abolished the duties on bullion of silver and gold, and established as the sole tax the 3 per cent, of the value of these metals. The costs of coinage and parting were estab- lished; the fehle (legal variation in weight) of the coins was fixed ; the expert requirements necessary for the technical em- ployes of the mints and parting-offices were determined ; quick- silver (liquid), no matter what its origin, was exempted from duties ; and powder was ordered to be sold to the miners at

xxxoisjsxICAL SKETCH OF MIXING LEGISLATION IN MEXICO. 53(>

In 1828 rules were made for the coflectioii of the duties on gold and silver ; the conditions required to enable a foreigner to acquire property in mines were set forth ; and moneys re- mitted to mining towns were excused from the duty of 2 per cent.

By the decree of 20th May, 1826, the Tribunal-General of Mining was suppressed, although it was, provisionally, formed into a board called the ‘Provisional Junta of Mining,’’ while the “ Establecimiento of Mining,” ordered by the same decree, was being constituted. By the decree of 15th September, 1829. the employes of the Establecimiento of Mining were substituted for the Oommissaries-General in the collection of the duties for the endowment fund of this establishment. In 1842 vari- ous decrees and circulars were issued considering the natives (Indians) and foreigners as discoverers of mines if they could prove that they had restored abandoned mining-camps. It was provided, also, that these foreign partners of discovery or res- torative companies should retain their property, even though they should absent themselves from the territory of the Repub- lic for any cause and during any time, provided that the com- panies in which they were partners should continue in exist- ence. The Junta de Fomento y Administrativa (“ Board of En- couragement and Administration of Mining,”) to take the place of the “ Establecimiento of Mining,” was formed and its rules* made. To this Junta was conceded the privilege that the mines which the Establecimiento of Tasco had inaugurated could not be denounced during two years.

Many .decrees and dispositions were issued in 1843. The old Deputations of Mines were continued in the exercise of their functions while the Courts of Mining were being established. The Courts of First Instance were authorized, after hearing the miners of the district (comprensidn) to form the schedule of the fees that the Territorial Deputies and their secretaries should charge. The Junta de Fomento y Administrativa of Mining was authorized to contract a loan up to |2, 000, 000, either within or outside of the Republic, with the object of pro- curing the contract for the quicksilver of the mines of Almadn. The collection of the duties imposed on cloths and fabrics of cotton, established by the law for the encouraging of mining, was arranged. The observance was ordered of all the dispo-

540 Historical Sketch Of Minino Legislation In Mexico.

sitions given by the Ordinances of Mining of 1783, to favor the exploitation of mines of quicksilver, freeing them from all impost, and conceding a premium of $25,000 to each of the first four exploiters who should, in one year, take out 2000 quintals of quicksilver (liquid), conferring upon them, more- over, other franchises. The Junto, de Fomento was authorized to work, provide with funds, and protect the mines of quick- silver, and to order deposits of this metal to be examined and surveyed. It was ordered that, in the Department of Ja- lisco, a special fund should be formed for the exploitation of mines of quicksilver, for which purpose the Departmental Junta of that State was authorized to place a loan, and, if un- able to negotiate it, an impost on such trades as should be con- sidered most appropriate in order to raise the sum of $100,000, which should be used exclusively to encourage mines of quick- silver in that department.

The appointment was ordered, of at least one commission in each department to scientifically examine and work the deposits of cinnabar. Finally, the manner of renewing the President and colleagues of the Courts of Mining of First Instance was made known.

The Decree of 30th April, 1844, was occupied with the es- tablishment and arrangement of the powder factories so as to reduce the price to miners.

That of 28th June, 1852, arranged the mining fund.

In 1853, the following Decrees were issued :

That treating of miners and their creditors, that permitting miners to manufacture powder, and that establishing the Prac- tical School of Mines and Metallurgy in Fresnillo, Zacatecas.

The Law of 31st May, 1854, regulated the judicial, govern- mental and administrative relations of mining. The circular of 7th November of the same year ordered that the Deputa- tions of Mining should be continued without any change, and the Decree of 23d December set forth the salary that the mem- bers of the Tribunal of Mining were to receive.

The Decree of 12th March, 1855, annulled Article 34 of the law relative to contests in the Deputations of Mining, Title 4th of the Ordinances of Mining remaining in force with respect to this. The Decree of 28th April permitted the ex- portation of ores from Lower California for three years. This

Historical Sketch Of Mining Legislation In Mexico. 541

permission was extended for five years more by tbe Decree of 3d February, 1857. The Decree of 25th June, 1855, declared that the placers of Arizona belonged to the nation, and the law of 23d Ifovember authorized the Judges of Common Eights (Faero Comun) to have cognizance of mining matters. The Decree of 3d January, 1856, re-established the Deputations of Mining, reducing their functions to the economico-governative ; Art, 3 of this Decree declaring that in the States in which there were no Deputations of Mining the economico-governative powers should reside in the Governors, who exercised them according to the terms fixed by the Ordinance and through the interior political authorities, to whom were presented the registers and denouncements to be forwarded to the Governors.

The Decree of 1st February declared that foreigners resi- dent in the Eepublic could possess mining properties.

The Decree of 10th September, 1857, reformed Articles 2, 4, 5 and 7 of the Ordinances of Mining, this reform being that the measurements of the pertenendas should be in metres and not in varas as they had required.

In January, 1861, a circular was issued ordering that the col- lection of fees destined for the support of the College of Min- ing should be expedited, and by the Decree of the 26th of the same month the Fund of Mining was extinguished, entering into the Public Credit, the government charging itself with the support of the College.

The Law of 29th May of this year provided for the appoint- ment of commissions to reform the Ordinances of Mining.

In 1865, it was ordered that every miner should have a rep- resentative in the place in which his mine was situated ; the legal formalities under which were made denouncements for abandonment of bad workings of mines were set forth, and the dimensions of the jdenencias of non-metallic substances were fixed.

The Circulars of 17th December, 1867, and 9th May, 1868, refer to the formation of mining statistics.

An order of the Treasury Department, dated 16th May, 1868, established a Junta of Mining to propose opportune fiscal modifications.

The Decrees of 9th, 10th and 24th December, 1871, 26ih January and 2d March, 1872, refer to the exportation of gold and silver coin and bullion.

542 Historical Sketch Oe Mining Legislation In Mexico.

The Decree of 8th May, 1873, authorizes certain mining companies of Zacatecas to export, free of duties, the sum of $250,000 for the purchase of quicksilver.*

All the laws, decrees and circulars just mentioned were issued by the General Government; and since upon thepromuD gation of the General Constitution of the Depublic, 5th Febru- ary, ISST, among the powers of the Congress of the Union, de- tailed in Article 72, that of Legislation on Mining was not in- cluded, but, on the contrary, it was provided in Article 117 that the powers not expressly conceded to the Federal functionaries should be understood to be reserved to the States, to them was reserved, in consequence, the power of legislation on mining.

All of them preserved the Ordinances of Mining of 1783 which remained in force for many years; for, although the States of Durango and Hidalgo did issue special mining codes, it was many years later. In all the States, the Deputations of Mining were suppressed ; and in some, special regulations were made, which I proceed to review.

In the Territory of Lower California, the Department of Mining was subordinate to the Political Governor of the Terri- tory, who resided in La Paz, and to him were remitted, by the Sub-Prefects of the districts, the denouncements and other matters relating to this department.

Under date of 27th June, 1874, the Political Governor of the Territory issued a regulation to formalize the proceedings in this department. This Vas in force till the Mining Code of 1884 was issued, and, judging from the information it has been possible to obtain, mining in that Territory has been in great decadence since. From April, 1866, to January, 1885, 152 denouncements were presented in the Territory, and of these in only ten was possession given.

The government of the State of Sonora, in exercise of the powers which pertained to it as a Territorial Deputation, in conformity with the law of 3d January, 1856, issued a circular, under date of 12th October, 1863, providing, among other things, that no Judicial or Administrative authority should demand fees from miners under any pretext, and that miners should not pay for giving course to their writs or for the protection of their mines other fees than those set forth in the Ordenanzas.

Olmedo j Lama, Appendix to the Ordimmee of and Bamirez’s Itiqueza> Mimra de Jfoico.

HISTORICAL SKETCH OP MimSGr LEGISLATION IN MEXICO. 543

The same government, by Decree No. 9, dated 24th October, 1879, established a tax of $20 for each title of mines that it should issue, and by circulars of 4th December, 1876, 5th April and 26th November, 1880, 8th January, 28th July, 6th August, 12th September and 26th November, 1881, provided that the Prefects should see that the provisions of Articles 2, 3 and 4 of Title xiv. of the Mining Ordinances, in respect to the purchasers of ores, were maintained in all their vigor and force in the State, and determined what stamps should be placed on titles of mines, what conditions shall be satisfied by denouncements in order to be registered, and the length of time, after taking possession, within which miners were required to provide themselves with a title. They also provided that coal-deposits could be de- nounced in the same way and under the same prescriptions as those of other {sic) metals; that, in the same communication, petitions for the extensions of time on difterent (yarias) mines should not be permitted ; that, in the denouncements of mines by foreigners, the Prefects, in addition to the reports required to be given by experts, should report also whether the said for- eigners resided in the State, in what part of it and during what time, and that whenever the Prefects should receive a denounce- ment, a petition for extension of time or other official communi- cation in relation to mining, they should immediately remit a simple copy of it to the government.

Decree No. 16, of 8d December, 1881, issued by the above- mentioned government, established a tax of $8 for the registry or denouncement of mines ; of $5 for each month of prorogation (extension of time) or protection {amparo) solicited, and of $32 for each title issued, rules being given in the same decree for the manner of paying this tax.

By circulars of 30th November and 2d and 14th December, 1881, it was made known that whoever presented proof of hav- ing first paid the corresponding fees would be considered the first denouncer ; that the time of the prorogation conceded to a mine having elapsed, it could not be considered as protected, in any manner, by Articles 13 and 14 of Title ix. of the Ordi- nances of Mining; and that course should not be given to any petition for prorogation that was not accompanied by the re- port of a mining expert and of the Prefect of the correspond- ing district.

Vol. Xxxii. — 32

644 Historical Sketch Of Miising Legislation In Mexico.

Decree IsTo. 24, of 24tli December of the same year, 1881, de- clared to be denounceable mines of coal, bitumen, sulphur, asphaltum, petroleum, salt, saltpetre, alum, kaolin and precious stones. It designated the dimensions of each of these 'perte- nencias and established the legal formalities to which the de- nouncements must be subject.

The Executive of the State was given authority to make con- tracts for the exploitation of these substances.

In the State of Sonora, according to what it is possible to gather from official notices, from 1870 to 1884, possession was given to 817 mines.

In the State of Coahuila, under date of 22d June, 1827, Decree hTo. 40 was issued to provide for the establishment of a Deputation of Mining in the mining district of Valle de Santa Rosa. This Deputation should be composed of the Alcalde, or whoever acted in his stead, and two residents, to be elected by an absolute majority of the vote of the town council of the Valle. This Deputation could appoint commissioners with cog- nizance of matters relating to mining in the new mining-camps outside of its immediate limits.

Under date of 29th February, 1868, the same State issued De- cree I7o. 31, which I believe worthy of particular consideration, because it gives an idea of the condition of mining in that State during the time referred to.

The preambles which served as the foundation of this decree terminated as follows :

“And adding to tMs that in Coahuila the industry of mining presents a per- spective of decadence and abandonment which already touches its complete ruin if the Legislative Power does not extend to it a protecting hand that will give it animation, lift it from the low condition in which it is, at the same time awak- ening in the inhabitants of the State the mining spirit which has disappeared almost entirely, the conclusion has been reached, in view of these considerations, to decree, etc.”

In virtue of this decree no fees were collected in the State from those interested in mining enterprises for the presentation, judicial decree and other legal actions necessary in denounce- ments, including the advertisements required to be made in public places; the denouncements of mines could be either verbal or in writing. If a person working a mine, even though he had not received possession of it, could prove to the Gov-

Historical Sketch Of Mining Legislation In Mexico. 545

eminent, either verbally or in writing, that he was in want of funds to continue the work, the Grovernment aided him by giving him gratis the blasting-powder he needed for daily con- sumption. The judge who gave possession of a mine should demand no pay whatever, and if the one thus favored wished voluntarily to make a present to him or to a member of Ms court, they could accept it if it did not consist of any share or right in the mine, and if it should not be construed to be a practice and custom in cases of its kind. The experts should charge only $10 for the examination of a mine and the other operations that were necessary for them to perform, and if the miner had no funds to meet this expense, the Grovernment aided him with half the amount as a loan, to be paid back. Reduc- tion-works and the capital invested in them were exempted for five years from the payment of municipal and State taxes. Finally the decree ends as follows :

'Art. 19. To favor the mining spirit in the State in a positive manner, and, at the same time, to avoid the injuries and even destruction caused by the ignor- ance, want of proper knowledge, and precipitation of those who venture upon ruinous enterprises without having sure and certain data regarding the richness of an ore, the Government is authorized to establish, in this capital, a Reduc- tion-works for the assay of ores by fusion, for which only the actual cost shall be charged, and a monthly bulletin of the results given by the ores assayed shall be published.

‘ ‘ Art. 20. The Government shall establish an assay office successively in the capital of each of the districts of the State.’’

Coahuila was the State that protected mining the most, but, unfortunately, its endeavors Avere wuthout avail, for, according to ofiicial State reports, no possession of mines was given during the time in which it had the power of legislating on mining. Now, as is well known, it is one of the greatest mining States.

In the State of Nuevo Leon only the Ordinances of 1783 -were in force, since the Government did not dispose otherwise ; but it will be sufficient to form an idea of the condition of mining in that State, during the epoch under consideration, to say that from 1853 to 1883, thirty years, possession was given to seventy mines.

The State of Jalisco, by Decree No. 451, dated 13th Octo- ber, 1873, suppressed, in all the State, the territorial Deputations of Mining which had been re-established by the general de-

546 Historical Sketch Of Miking Legislation In Mexico.

cree of 8d January, 1856, the Judges of First Instance exer- cising the economic-gubernatorial functions with which the deji- utations had been charged.

By the Decree 'So. 54 of 19th October, 1883, that of 25th April, 1829, was repealed, leaving in full force Article 22, Title vi., of the Ordinances of Mining; and coal-fields were expressly covered by it.

The Decree of 27th September, 1887, provided that metallur- gical establishments should pay a single tax of 6 per thousand instead of the 12 per thousand they had been paying, and that the products of the mines should pay 1 per cent, on the value of ores extracted, without deductions of costs.

There is no information in regard to the number of de- nouncements and possessions conceded during the epoch under consideration. It is only known that from 1883 to 1884 judi- cial protection was granted for suspension of work for from two to three years in a considerable number of mines, without loss of property in them.

The State of Durango issued an especial Mining Code, in which it was declared that mines belonged to the State ; the origin of property in mines was denouncement and adjudica- tion; mines were lost by failure to work; the legal formalities to be followed in denouncements and other proceedings relative to mining were established; and the Ordinances of 1783, as well as the other laws and dispositions made anterior to this code, were repealed.

The State of Guanajuato issued the law of 5th May, 1867, which treated of mining in an especial manner. It determined the manner of procedure in the difi:erent cases that could hap- pen in the application of the law; it organized the Deputations of Mining; designated what were to be the dimensions of per- tenencias; the legal formalities to be followed in denounce- ments, etc. It also exempted every one employed in the work of the mines from military duty and from municipal com- missions.

The State of Puebla issued a law 23d June, 1880, exempting coal-mines from all tax, and oflTering premiums to the exploiters of this combustible mineral. The law of 3d October, 1881, declared denounceable certain substances comprised in Article 22 of Title vi. of the Ordinances of Mining, regulated

HISTORICAL SKETCH OF MINING LEGISLATION IN xMEXICO. 547

tlie denouncements, fixed the dimensions of the perteneneias and authorized certain protections. The law of 9th August, 1882, and its subordinate regulations, dated 26th of the same month, ofiered a premium to the exploiters of coal-mines who complied with certain requisites.

In the other States the principal dispositions related essen- tially to taxes, and in the majority of them mining was heavily charged.

The State of Gruerrero, by its law of 23d April, 1875, sup- pressed the Deputations of Mining, their functions being exer- cised by the Governor of the State through the interior political authorities. The legal formalities to be followed in denounce- ments, and the cases of opposition presented were established. The works of possession were dispensed with when treating of irregular deposits. Under date of 29th of the same month and year, the regulations under the foregoing law and the tariff* for the fees of the experts were issued.

In the State of Hidalgo, even when a special mining code had been issued, the Ordinances of 1783 were in force for some time — also several decrees were issued before the promulga- tion of this code. They \vere the following : Decree Uo. 29, dated 30th September, 1871, by which mines were considered to be divided into twenty-five barras (shares) ; of these, one non- assessable belonged to the Government, which had the same rights, powers and obligations as the other non-assessable share- holders. Afterwards, it was published, by decree Uo. 410, Trac- tion hi., Article 1, that mines acquired before the foregoing de- cree, and in which the Government had owned no non-assessable share, should pay to the State 4 per cent, on their earnings.

Decree Ho. 156, of 30th September, 1872, established a tax of 8 per M. on reduction-, and 2 per cent, on the value of the silver extracted. By Ho. 213, of 13th October, 1874, the mines or deposits of iron-ore in the State were ex- empted from the tax on mines, as also from the duties granted to the State by Decree 129. By Decree Ho. 181, dated 26th September, 1877, all mines in which the government held a non-assessable share were exempted from the payment of the tax of 4 per cent, levied on paying mines.

The State of Hidalgo issued its Mining Code the 10th Octo- ber, 1884. By it, mines of metalliferous substances and com-

548 Historical Sketch Of Mining Legislation In Mexico.

bustible minerals were declared to pertain to tlie radical do- minion of the State, whicli could grant them in property and possession to the private persons, whether citizens or foreign- ers, who solicited them, according to the rules and under the conditions fixed by the same code.

The Executive of the State was encharged with economic and governative functions in the department of mining. The Jefes Politicos (Prefects) were his intermediaries in this busi- ness. Denouncements could be made of new metalliferous de- posits, abandoned mines, mines in ruins, sites and water for reduction-works, and of abandoned reduction-works. In recog- nition of the radical dominion of the State over all metallifer- ous properties within its territory, there was assigned to it one preferred ’’ non-assessable barra of the twenty-five into which the mines were divided.

A preferred non-assessable barra was understood to be one which conferred upon the Government the right to receive profits (earnings) as soon as the operating expenses were paid, even though the other non-assessable shares received nothing yet. The legal formal ties, to which denouncements and other proceedings relative to mines must conform, were established, and the Ordinances of Mining of 22d May, 1783, were re- pealed, as also all the former laws and dispositions that had been issued concerning mining.

Later than the foregoing Code, by Decree ISTo. 417, of 3d May, 1882, the payment of the 4 per cent, on mines in earn- ing, referred to in Decree IsTo. 410, was regulated, and the tax collectors were authorized to arrange commutations (iguala) for this tax.

Decree Ho. 423, of 10th October, 1882, fixed the fees that should be paid the Prefects for mining proceedings that came before them, and also the fees of experts for work done by them. Decree Ho. 467, of 11th May, 1885, established a tax of 2 per cent, on the production of mines without deduction of expenses; as provided by the Mining Code of 1884, it returned to the dominion and profit of the owners of the mines the preferred ’’ non-assessable barras belonging to the State in various mines; and the 4 per cent, to be paid by mines earning profits was annulled.

There were others issued, but they reglamented the payment of the established taxes.

Historical Sketch Op Mikixg Legislation In Mexico. 549

The last one issued was Xo. 487, dated 27th March, 1886, wdiich ordered that the gold and silver extracted from the mines should pay per cent, on their value, and that gold- and silver-ores should pay 2 per cent. on. their assay-fineness.

The same decree prescribed the manner of payment of this tax. Many other decrees were issued, but they related to legal protection (amparos) granted to mines.

Oaxaca was one of the States most prominent for the interest shown in mining from an early date, the encouragement and development of which it stimulated by appropriate dispositions.

The law of 10th September, 1857, abolished legal fees ; of 8th December of the same year designated 1,000,000 square meters for the pertenencias of coal-mines; of 10th December, 1858, fixed the salary and obligations of the Secretary of Mining ; of 15th May, 1876, disposed of the internal arrangements of the Territorial Deputation; of 17th December, 1883, declared free from every kind of tax the capitals employed exclusively in mining ; the mines and reduction-works ; ores in any form ex- tracted from the mines of the State, as well in their interior circulation as in their exportation ; machinery, quicksilver, iron, powder, dynamite, and fuse intended for use in the mines.

My friend, the distinguished engineer, D. Gilberto Crespo y Martinez, in a notable speech pronounced in the Chamber of Deputies during the session of 80th November, 1886, in the discussion which was the cause of the law of 6th June, 1887, spoke at length on these taxes, which he qualified as absurd.

The diversity of the laws governing mining during this epoch, the distinct and often opposing opinions concerning this industry held in many of the federal entities, the heavy taxes upon the industry, were all more than sufficient causes for the slow, torpid development of mining. These obstacles were made more patent when in the case of a mineral-deposit, w'hich extended from one State into the adjacent one ; for then the mining-properties established on this deposit were subject to two different legislations, and these properties, which by law and by their nature were indivisible, presented the anomalous case where part of them incurred the penalty of abandonment, according to the State in which it belonged, and the other part did not incur a like penalty, also in conformity with the legislation of its State.

550 Historical Sketch Of Mining Legislation In Mexico.

The necessary consequences of this condition of aftairs was to damage seriously the development of mining.

Kotable writers and persons well informed in the subject, by means of reasonable and well-founded articles published prin- cipally ill El Ex])loTador llinero and El Minero Mexicano. called the attention of the Supreme Government to the necessity ot introducing fundamental reforms in the mining legislation.

The Secretary of Justice appointed a Commission composed of two mining engineers and two lawyers. One of the engi- neers resigned from the Commission. The other members, on the 8th May, 1874, presented a draft of a mining law for the Federal District and the Territory of Lower California. This project did not become a law, and, as it naturally did not rem- edy the evil existing in the whole Republic, it was necessary to seek some other means.

Im.

The Mining Code of 1884 and the Lav: of th Jime 1887.

The late General Carlos Pacheco, to -whose energy, talent and activity the country owes so much while Minister of Fo- mento, and his honest, faithful, laborious and accomplished sub-Secretary, Engineer D. Manual Fernandez Leal, vere both constantly animated by the best intentions, and always dis- posed to do all in their power within the sphere of their func- tions, to encourage and develop all the branches of industry at that time dependent on their Ministry. Great benefits to the country were the results of their noble conduct.

They soon perceived, as it was natural that persons of such aptitudes and honorable purposes should, the imperative neces- sity of remedying in a radical manner the difficult and almost disastrous conditions in which mining, our principal industry, was found.

Very soon the Department of Foviento initiated the forma- tion of a society, called the “Mexican Society of Mining.’’ The Secretary of Fomento as representing the First Magis- trate of the 17ation, presided at its inaugural meeting, held 5th February, 1883. Before this, the members of the Board of Direction had been appointed, and also the Committees on En- couragement (Fonwito), Statistics, Sciences, Legislation, Publi- cation and Means (Arbitrids), The Society, having been inaugu-

Historical Sketch Oe Mihikg Leghslatiok In Mexico. 551

rated, proceeded to organize the personnel of its membership, electing honorary and active members juntas of correspond- ents. A Special Committee was also apjioiiited, composed of learned and practical men of known honorable antecedents, to propose what franchises should be granted to capitals invested in mining.

This committee, the members of which were General P. Diaz, Jesus Fiientes y Muniz, Benito Gomez Farias, immedi- ately complied with its charge, presenting an interesting report well founded and reasoned. In it the authors give proof not only of having studied the question to the bottom, but also of great zeal and efficacy in the discharge of their commission.

They conclude, proposing:

1. The endeavor, by all direct and indirect means that the General Government may consider expedient, to arrive at a uniform mining legislation, inspired by the letter and spirit of the old Ordinances of Mining.

2. Suppression of the General Imposts which weigh exclu- sively on raining and, if possible, uniform legislation through- out the Republic; establishment of a single general impost on mining products in such manner that it does not touch the capita], but only the income or profits, — part of this impost to be handed to the respective States.

3. Recommendation to the States by the General Govern- ment to free from alcabala (octroi) all articles destined for con- sumption by exploiting and beneficiating miners, charging local imposts exclusively upon the income and profit, but never upon the capital invested in mining.

4. Reduction of the fees for coinage and parting in all the mints, when they should come under the direct administration of the General Government, upon the termination of the leases.

‘ 6. The urgent necessity of publishing a collection of mining- maps of the principal mining-districts of the Republic, with text, giving information on all points concerning the exploita- tion of mines and the beneficiating of ores or minerals; and, also, notes on the principal and mother-veins, deposits of coal, lignite, petroleum, cinnabar, etc. ; and on woods, water, and topographic and climatic conditions.

6. Exemption, for periods of one to three years, from Fed- eral tax on foreign or Mexican capital destined exclusively to

552 Historical Sketch Of Mining Legislation In Mexico.

mining enterprises, so that, during the time of trials and un- productive preparatory work, capital intended for such a bene- ficial industry should not be heavily charged.

7. Concentration in the Mexican Society of Mining of all the data, notices, statements, plans and reports, which could serve, by opportune publication, to encourage foreigners and Mexicans to decide to invest capital in mining.

The first Committee on Legislation, of the two appointed by the Mexican Society of Mining, formed by the lawyers, Messrs. Pedro Eseudero and Pedro Bejarano, and the engineer, Santi- ago Ramirez, after holding various meetings, also presented a report to the Board of Direction proposing that, with due attention to the legal requisites, the General Constitution be amended with the intention of giving the power of legislation on mining to the Congress of the Union.

This report was approved by the Board of Direction and sent to the Secretary of Fomento ; and the President of the Repub- lic, on 16th Ma}", 1883, recommended its passage to the Plouse of Deputies.

It was passed by a large majority of both Houses.

With some amplifications and modifications, it was approved by nineteen and rejected by only two of the State Legislatures.

In virtue of this reform it, therefore, became a power of the Congress of the Union, To issue Codes of Mining and Com- merce, banking operations being included in the latter, which shall be obligatory in the whole Republic.’’ December 14th, 1883, this amendment was promulgated, and on the 15th of the same month the Executive was authorized to issue the Mining Code wdiich should have force in the whole Republic.

The Minister of Fomento immediately proceeded to appoint a commission which, taking into account the laws existing in all the States and in other countries, should draft a Mining Code.

This Commission was formed of Lawyer Pedro Bejarano,, Engineers Manuel M. Contreras and Santiago Ramirez, with Francisco Bulnes, Secretary; but Sr. Ramirez, not being in accord with the Commission on certain points, withdrew from it and was charged by the Secretary of Fomento to present his draft of a Mining Code also.

Sr. Ramirez, as well as the rest of the Commission, pre- sented projects, and the Secretary of Fomento wishing to pro

Historical Sketch Op Iiikikg Legislation In Mexico. 533

ceed in such a delicate business with all caution, invited the States to appoint representatives to revise these projects and make such observations as they should think pertinent. Twenty-two States responded to this invitation and appointed representatives. Some of the criticisms of the representatives were published, the most interesting being that of Lawyer Ignacio L. Vallarta, who represented Sinaloa. He compares the two projects with each other and wuth the Ordinances of Mining. The project of the commission was approved, with some modifications, and published under date of 22d November 1884, to go into efltect 1st January, 1885. As stated by the com- mission in the preamble, for the most part it folloved as a foundation the principles established by the Ordinances of Min- ing, believing that it would be improper and dangerous to alter them.

Having given, now, an idea of the provisions of the old ordi- nances, I shall proceed to merely note the more unusual differ- ences.

By the Code of 1884 greater extent was given to the per- ienencias; denouncements could be made, not only for aban- donment, but also for improper working, want of drainage and want of ventilation ; the period of abandonment, according to the old Ordinances, was four months, the Code of 1884 extended it to six. Moreover, it authorized the Deputations to grant pro- tection for six months, and the Minister of Fomento could grant other protection in special cases for one year.

The taxes were reduced to 2 per cent, on the value of the metal without deduction of costs. This tax was for the State in which the mine was situated, or for the Federation, if in the Federal District or the Territory of Lower California; also the duties of coinage and exportation were to be paid. Reduction- works paid the same tax as other industrial establishments.

The Government received 25 per cent, of the foregoing taxes.

Deposits of coal and its varieties, as also deposits of iron and tin, belonged to the owner of the ground, along with the rocks and other matters of the soil.

For the period of fifty years mines of all varieties of coal, of iron and of quicksilver, with their products, were exempted from all direct taxes.

Within the Republic gold and silver, either in bullion or

554 Historical Sketch Of Mining Legislation In Mexico.

coin, were allowed eireulatioii free from any tax, as was also the case with the other metals and with all the products of the mines. Quicksilver continued exempt from importation duties and all direct taxation.

By Article 218, the Ordinances of Mining of 22d May, 1783, were repealed, as were also the other laws, decrees and dispositions relating to mining of the Colonial period, of the Federation or of the States, even in the part not opposed to the new code.

Mining legislation in the wdiole Republic thus unified, with- out doubt a great step in advance was taken, and the industry was placed in relatively favorable conditions for a rapid devel- opment ; but, either because the law, through want of compre- hension, -was not properly interpreted, or because some of its provisions were abused, the result, in my opinion, did not cor- respond in an entirely satisfactory manner to the noble aims of its authors.

The present writer, who, wuthout being worthy of it, has been for several years at the head of the Bureau of Mines established under the Department of Fomenio by the Code of 1884, has had the opportunity to know of several cases that prove the foregoing statement, but in this paper, already too long and tedious, it would not be advisable to recite them.

It is sufBcient to say that the actions provoked by denounce- ments for abandonment were frequent and lengthy, and came from the difficulty of proving whether the mine really was abandoned or not. The same could be said concerning ques- tions of the subterranean invasion of pertenencias even when permitted, more frequently than not ; the provisions for such cases of the Code of Mining were not complied with. For similar reasons the questions of drainage 'were prolific of con- tentions. Notwithstanding that the Code of 1884, like the Ordinances of Mining, established compulsory working in the mines as the only means of preserving the property in them, there were not 'wanting means for the miner to retain this property wdthout doing any work and still keep within the bounds of the la'v. By combining and alternating the periods of abandonment and protection (amparo) that could be granted by the Deputations of Mining and by the Minister of Fomento he could arrange to work only six months in three years, or he

HISTORICAL SKETCH OF MKIXG LEGISLATION IN MEXICO. OOd-

could even allow the denouncement to become forfeited and as the law did not prohibit it, make a iieAv denouncement By such means he could retain the property of a mine without ever doing any work. Several Deputations of Mining reported cases where miners had held mines by these means for five and six years without ever taking possession.

After the promulgation of the Mining Code various circulars were issued, of which I shall cite only the principal ones: that of 13th July, 1886, elucidating Articles 50 and 57, with regard to the date from which the period of abandonment should begin to be computed; that of 5th October, 1886, ex- plaining Article 112, relating to the adjudication of demasias (unoccupied ground between two concessions) less than a perte- nenda in extent; that of 24th June, 1887, establishing regula- tions under Articles 112 and 123, as to the inspection of mines ; and that of 25th September, 1889, explaining Articles 117 and 118, as to communications between contiguous mines.

The mining industry had scarcely begun to feel the influence of the Mining Code, just issued, when it was threatened by a new danger in the strong and sudden depreciation of silver. The Government considered that the advantages ottered by the Mining Code were not sufl3.eient to tide over the crisis, and,, moreover, that it was necessary to proceed with activity, em- ploying energetic and etticacious means to counteract the evil. The Department of Fomento immediately proceeded to work on this line, and, comprehending perfectly what were the most important points to be studied in order to solve the question, appointed a commission, composed of the Engineers D. Gilberto* Crespo y Martinez and D. Augustin Barroso, to make a study of the probable causes of the mercantile crisis and of the de- preciation of silver, and to indicate the measures that, in their opinion, it would be wise to take.

Another commission, composed of the Engineers D. Manuel Maria Contreras and Andres Aldasero, was appointed to report concerning the influence of the depreciation of silver on our mining industries, and the practical means of promoting this industry in order to reduce the cost of production.

Engineer D. Luis Salazar was commissioned to study what agricultural products should be fostered by the Eederal Gov- ernment, and in what manner ; Sr. Francisco Bulnes and Dr.

556 Histoeical Sketch Of Mining Legislation In Mexico.

Manael Flores to propose tlie means for the development of the industries existing in the country, and those that could be undertaken with good prospects of success; and Lawyer Joa- quin J). Casasus to indicate whether or no it would be advan- tageous to the Eepublic to enter into some international mone- tary agreement."

All these commissions satisfactorily discharged their pre- scribed duties.

By determination of the President of the Republic, commu- nicated through the Department of Fomento, the Departments of the Treasury and of Goberyiacion were invited to appoint delegates who, together with the delegate of the Department of Fomento should make a complete study of the matter and formulate the reforms that ought to be made in the customs duties in order to promote agriculture, mining and industries in general. The result of all this work was the bill that sev- eral members of the Parliament presented to the Chambers, and which, with slight modifications and after mature discus- sion, was approved and promulgated under date of 6th June,

By this law, mines of coal, in all its varieties, of petroleum, of iron and quicksilver, and also their mineral products, were exempted from all Federal, local or municipal tax, except the stamp-tax. The circulation, within the Eepublic, of gold and silver, either in bullion or coined, and of the other metals and of all products of the mines, was declared free from the duties of octroi (cilcabala) or of porterage, and from all tax. Quick- silver, of whatever origin, was exempted from all charges, what- ever might be their denomination.

As for taxes: One alone was decreed for mines, and that was 2 per cent, on the value of the metal, or of the substance ex- ploited, without deduction of costs; and for reduction-works 6 per M. on the value of the property, with all its machinery, was the only tax. Any other tax, under whatever name it might be known, was strictly prohibited, and the States, also, were prohibited from collecting dues for denouncements, pos- sessions, and other formalities for the acquisition of mines and reduction-works.

La Crisis Monetaria.

Historical Sketch Oe Mikihg Legislation In Mexico. 557

By Article 10 of this law the Executive was authorized to enter into contracts for mining explorations and exploitations, granting special franchises and ample concessions, being sub- ject ill the closing of the contracts to the following conditions:

The duration of the special concessions and franchises could not exceed ten years ; the minimum of capital that might be invested in the exploitation of mines should be $200,000 within five years ; this capital should be exempt from all Federal tax except the stamp-tax. The maximum number of 'perUnmdas that could be granted in common eases was twenty, either con- tinuous or separated, and thirty, when treating of the discovery or restoration of Mining Districts. The dimensions of ftrie- nencias were subject to the prescriptions of the Mining Code of 1884, except in the case of auriferous placers. In this case the 'perteneneias were considered the same as those for an irregular mineral-deposit [300 m. x 800 m. The pertenencia on gold-placers was, by the Code, 20 meters on a side] . The number of operatives that a concessionaire could have would be twenty, the company having the most ample freedom to work in the jmtenencia or pertenencias that it might wish. Moreover, the Department of Fomenio in grave cases, prop- erly authenticated, could grant an extraordinary protection (amparo) up to two years; the concessionaire could also enjoy the protections to which the Mining Code referred.

Such were the principal dispositions with respect to mining established by the law of 6th June, 1887. It also contained others applicable to other industries. The Department of Fo- 77ienio, ill virtue of the powers granted in Article 10 of the la'w of 6th June, 1887, entered into 366 contracts with distinct individuals for mining explorations and exploitations.

By this means it obtained the investment of a large amount of capital, not only in the exploitation of mines, but also in the reconnoissance of a great part of the States. Mining-produc- tion augmented notably, notwithstanding the monetary crisis that threatened to restrict its production.

Besides the law of 6th June, 1887, of which we have been speaking, a decree was issued on the same date authorizing the Executive to acquire, by purchase, a process of reduction that should satisfy certain conditions, and to grant franchises and privileges to the company owning the process.

558 Historical Sketch Of Minikg Lecislatiox Ik Mexico.

The Laic of Uh June 1892, and Ciradars Relatice Thereto.

The passage from the Ordinances of Mining to the legisla- tion of the States, the passage from this to the Mining Code of 1881, and from this to the law of 6th June, 1887, provided use- ful lessons and great experience, which gave ability to appre- ciate what was the path that ought to be followed to give sta- Ijility to mining-property, and to guarantee its rapid and certain development.

Senor D. Manuel Fernandez Leal, Engineer, who, through great and recognized merits, had reached the honorable posi- tion of Secretary of Fomento fully understood this, and in an important memorial to the Congress of the IJnion on the con- dition of the different bureaus of the department so ably admin- istered by him during the four years 1892-96, expresses him- self thus :

Starting from the principle demonstrated by the facts of modern science, as also by the reasoning of the most profound thinkers, that property, whether min- ing or any other, is productive only when easy to be acquired and certain to be preserved, and that its exploitation should be free and voluntary ; this Depart- ment has aspired for some time to assimilate, as much as possible, mining-prop- erty to other forms of property, to cover it with the shield that protects not only territorial but personal and even intellectual property, and to put in its hands the supplement of resources that these guarantees provide for its extension and bet- terment.’'

To this end were directed the noble endeavors of the Secre- tary of Fomento efficiently aided by his sub-Secretary, the learned and progressive Engineer, D. Gilberto Crespo y Marti- nez. Inspired by these motives, after mature and careful study, the Secretary of Fomento presented to the Chambers his draught of a law, expressing himself as follows:

‘‘Xow that the (ountry enjoys perfect tranquillity, realizing slow but certain progress in the most important branches ; that means of transportation begin to be easy and economical ; that all industries respond to these favorable conditions ; that the currents of traffic are modified, commerce is transformed and crises pro- duce less lamentable effects than in epochs not far distant, it seems apparent that, when in virtue of all these circumstances our social condition is bettered and the wealth of the nation augmented, we should consider the most opportune moment has arrived to implant a fitting reform in our laws which, if indeed they define it well, very imperfectly protect, the property of mines.”

HISTORICAL SKETCH OF MIKING LEGISLATION IN MEXICO, OOlf

Farther on :

‘ If the great economic laws of labor are exact, there being no reason allowing ns to suppose that they can vary in their results by their application to the ex- ploitation of substances found beneath and not above the surface of the ground, it is indubitable that the rapid aggrandizement of Mexican mining will be ac- complished by these three conditions : facility of acquisition, liberty of exploi- tation, security of retention.”

This initiative, amply and minutely discussed in the Cham- bers, was approved and the law issued, under date of 4th June, 1892, which consolidated mining-property and placed it upon almost the same footing as other properties.

According to this law the miner can acquire the number of jpertejuncias he wishes, whether continuous or broken (inter- rupted), — a 'perimmcia being defined as a square, 100 meters long on each side. He is given complete liberty of industrial action to work in the manner that best suits his convenience, to push forward {aciivcmdo), retard or suspend, for more or less time, his works ; to employ in them the number of opera- tives he wishes, and at the point that appears to him the best, and follow the system he prefers of working, extraction, drain- age and ventilation, as he judges most appropriate to his own interests. iTevertheless, he is held responsible for the accidents which happen in the mines, on account of being badly worked, and must ‘‘indemnify the damages he may cause other properties by want of drainage or any other circumstance that diminish alien interests.’’ (Art. 22 of the Law.)

The unclaimed lands (demasiccs) between two or more adjacent mines are no longer divided between them, as was formerly the practice, but they are given to whoever solicits them first. The miner can no longer go outside of the boundaries of his own perienencia and enter that of his neighbor without the latter’s consent. Works of possession were suppressed since this formality had been abolished. How, the property is acquired by the title issued by the Department of Fomento and is irrevocable and perpetual on the payment of the Fed- eral property-tax, and is lost only through failure to make this payment. Mining-lands, as well as adjacent ordinary proper- ties, are subject to the easements of passage, aqueduct, drainage and ventilation. Lastly, mining-works are declared to be of “ public utility,” and, in consequence, the land necessary for VOL. XX XII. — 33

560 Historical Sketch Of Miking- Legislation In Mexico,

ttem can be obtained by expropriation in default of a mutual agreement between the parties concerned.

The Deputations of Mining were abolished, and in their place were substituted Agencies, of which there are 140 dis- persed throughout the Republic in such manner as is consid- ered most conducive to the proper dispatch of business relating to the mines.

The Mining-Agents have no other functions than to give legal course to the petitions for concessions presented to them in accordance with the Regulations issued under the law of 25th June, 1892.

The first steps of the proceeding having been taken and the papers drawn up, they are remitted to the Department of Fo- menio and, after examination, if approved, the title issues. Ill case any opposition is presented to the action of the Agent, and it is impossible for the parties to reach an agreement, the matter is referred to the Courts. The fees to be paid the Agents for the discharge of their duties are fixed by law.

Various circulars have been issued since the law of 4th June, 1892, of which I shall cite only the principal ones.

No. 3 refers to the amplification or reduction of cias; No. 4 to the retirement of the petitioners after the peti- tion for concession has been admitted by the Mining Agencies. No. 11 treats of the manner of procedure when petitioning for amplification, rectification or reduction of mining-property. No. 12 treats of the legal procedures when a foreigner petitions to acquire mining-property within the frontier-zones of twenty leagues. No 30 treats of the reduction of pertenencias and the voluntary retirement of those interested. No. 32 makes more clear and precise the conditions which, by the Regula- tions under the law of 4th June, 1892, the petitions for con- cessions should satisfy, in order to be admitted. No. 33 fixes the penalties incurred by those interested, who, when they receive the document of proceedings, or a copy of it, do not deliver it to the Judge or the Department of Fomento (as the case may be) within the time designated by the Agency.

The law of 6th June, 1892, established the Federal property- tax to which the mining-law refers. It is divided into two parts : one is satisfied by revenue-stamps, which are afiixod to the titles, and is paid only once; the other is paid annually on

Historical Sketch Oe Mikik Lecislatiok Ik Jmexico. 561

eaeh inrtenmcia of whicli tlie concession is composed. Ac- cording to the law cited, the stamps to be affixed to the titles Rre of the value of |10 for each inrtenmda or fraction equal to or greater than one-half ; fractions less than one-half are not taxed. The annual tax is also |10 for each pertenencia to be prepaid in thirds every fiscal year. The Regulations under this law, dated 80th June, 1892, fix the basis for the payment of this annual tax, the mines covered by contract with the De- partment of Foynento having been exempted.

The foregoing tax was modified by the Decree of 3d June, 1898; according to this, titles to mines which are not of gold, silver or platinum require stamps for only $2.50 per pertenen- ezh, and the annual tax is reduced to the same amount. But if these mines contain gold, silver or platinum, in whatever pro- portion, they shall pay the quota of $10 per pertejiencia both on the titles and in the annual tax. The Executive, in this case, can reduce the annual tax to $5 per hectara, if the pertenen- cias of one Company are over 50 and less than 100, and to $2.50 if they are over 100; provided, always, that the ores con- tain less than 250 grammes of silver or less than 10 grammes of gold per ton. Various other decrees were issued since the laws of 4th and 6th June, 1892.

Articles 1 to 5, inclusive, of the Decree of October, 1892, have now become of no effect; there remains in force only Article 6, authorizing the Executive to make such modi- fications in the laws of 4th and 6th June, 1892, as he believes necessary for the betterment and development of the mining industry. The Decrees of 31st December, 1892, and 6th June, 1894, having served their purpose, are now without applica- tion.

The Decree of 14th December, 1897, declares that, upon the termination of a permission for exploration, granted under the Mining Law and its Regulations, no new permission shall be given to explore the same ground until six months have elapsed. During this time the ground remains open to peti- tions for mining-grants. The same Decree declares that, where there are mines in possession, the explorations shall be con- ducted only in lands that are 200 meters from the boundaries of the pertenmcias. It also permits explorations in abandoned

mines.

562 Histoeical Sketch Op Mining Legislation In Mexico.

The Decree of 13th ITovemher, 1899, — the last one relating' to mining that has been issued — extends to one year the time granted for explorations when dealing with subterranean aurif- erous placers. These explorations, however, are no impedi- ment to the solicitation of grants under the ruling law, to exploit deposits of any other minerals within the zone of explorations.

In the present year, several circulars have been issued, among which it is necessary to mention only Ho. 34, since the others directed to the mining-agents are economic in character, and have for their sole object the greater improvement of the service.

Circular 34 recalls to notice the fact that the reduction of the pertenenda for which petition has been presented to the Agen- cies, can be accomplished only during the course of the pro- ceedings, or after the acquisition of the respective title.

Here end the dispositions that have been given, up to the present, concerning mining in this country, and by this lengthy account can be seen the different transformations that mining legislation has undergone (without change of principles) from the Colonial times to the issuance of the law of 4th June,,

With the promulgation of this law, principles entirely the opposite of those which had been in force for more than a cen- tury were established, and, therefore, it is easy to understand the commotion that took place in the guild of miners with such a radical change, especially since it was believed that those* principles were the only ones proper for the mining industry. This belief was deep-rooted, since it had been almost unques- tioned for centuries. Clubs, Congresses, Juntas and Commis- sions were formed among the miners to protest against the law, but the Supreme Government, convinced that it had not yet been well understood, believed it best to wait; and now, be it said to their honor, these very opposers of the law are the very ones, the first, who do not wish to return to the old regime.

At first, dissatisfaction was noticed on all sides ; no one ap- proached the Agencies to solicit mining pertenendaSj or, in case petitions were presented, they were only for one, or at

Histoeigal Sketch Oe Mining Legislation In Mexico. 563

most two, ])erime7icias. Time passed, convincement came, 'Confidence reigned, prejudices disappeared, and ideas changed, with the result that the movement in mining became so much greater that I do not hesitate to say that the present epoch is the most favorable for mining that Mexico has ever experi- enced.

In the most interesting memoir, published by the Minister of Fomento Engineer Sr. D. Manuel Eernandez Leal, and which refers to the quadrennial 1892 to 1896 (part of the time that this Department was under his charge), can be seen what has been the result of the law of which we have just spoken.

Conclusion.

By what has been set forth in the foregoing pages, it is easy to see that mining-property in Mexico has been subject, during the lapse of time, to all the different systems that have gov- erned property in mines. Of all , these, which has been the most appropriate for Mexico ? This is not a question for me to solve; I lack completely the necessary aptitudes and knowl- edge, and it was not for this that I was honored by the invita- tion to prepare this paper.

Furthermore, the question, in my judgment, is difficult when we take into account the conditions of peace, tranquillity nnd progress that we now enjoy and which did not exist in former times. Since these conditions intervene as a most essential factor in the problem, it is easy to comprehend how elifficult it is to arrive at an exact conclusion.

It can be objected that the progress of the country, which is greater every day, implies as a necessary consequence advance in all the other distinct branches ; this provokes these questions : Is the law of 4th June, 1892, now actually in force, in proper re- lation with the advance and progress achieved by the country ? Is the prosperous state which our mining enjoys at present due principally to the present legislation or to the conditions of ad- vance, peace and tranquillity that we enjoy, or to both causes combined ? The foregoing considerations have been suggested to me by the opinions that have been presented for and against both the present and the former legislation.

564 Historical Sketch Of Mining Legislation In Mexico.

Believing that the data relating to production should be taken into account in the study of this question, I give them in the following statement.

The production of silver and gold, as shown by the coinage- value, was

Colonial Legislation,

Silver and Gold.

1492 to 1881,

Production. Annual mean.

$4, 553, 859, 113 $11,828,205

Difference

Silver.

1881 to 1885,

State Legislation.

Production. Annual mean.

$157,827,478 $31,565,495

Difference.

$19,737,290'

Code of

1884 and Laio of Qtk June, 1887.

Silver.

1886 to 1890,

Production. Annual mean.

$199,208,204 $39,841,640

Difference.

$8,276,145.

Laio of Consolidation,

Silver.

1892 to 1896,

Production. Annual mean.

$225,247,495 $56,311,864

Difference.

$16,470,224

As is seen, in the production from 1881 to 1890, silver only has been included ; the production of gold was as follows :

Years.

1892- 1893,

1893- 1894,

1894- 1895,

1895- 1896,

Production of Gold.

$1,269,907

1,244,621

4,744,542

6,054,078t

With great satisfaction, I give the value of the production of silver and gold from 1st July, 1896, to 30th June, 1901, as fol- lows, according to the data kindly furnished by the present Di- rector of Mints, Engineer Sr. D. Manuel Fernandez Leal, to whom I am under great obligations for his kindness, attention and assistance. These data have been calculated from the de- posits in the Mints, the exports reported to the Mints, and the export reported to the Custom Houses.

Fiscal Years.

Value of Silver.

Value of Gold.

1896-1897,

. $63,342,454.70

$7,218,835.93

1897-1898,

70,923,024.53

7,726,005.99

1898-1899,

69,547,708.11

8,339,891.83

1899-1900,

72,115,508.36

8,505,787.04

1900-1901,

74,245,907.87

10,056,350.77

The foregoing data Lave been compiled by combining those of the Miqueza Min&ra de Mexico by D. Santiago Kamirez, with those of the Memoir of Fo- mento for the four years, 1892 to 1896.

t Memoir of the Ministry of FomentOj 1892 to 1896, p. 75, published by the for- mer Minister, Engineer Sr. D. Manuel Femlmdez Leal.

HISTORICAL SKETCH OF MIKIKa LEGISLATION IN MEXICO. 565

Tfjtal Value of the Production of Siker and GoldV

Fiscal Years. Value of Silver and Gold.

1896- 1897, §70,561,290.63

1897- 1898, 78,649,030.52

1898- 1899, 77,887,-599.94

1899- 1900, 80,621,295.40

1900- 1901, 84,302,2.58.64

Unfortunately, I do not have the production of copper, lead, iron, etc. ; but the foregoing data, always increasing, demon- strate among other things that, notwithstanding the great depreciation of silver, mining in Mexico has not gone back- ward, but has rather acquired greater development, and this is more noticeable since the passage of the law of 4th June, 1892. The great economist, Leroy Beaulieu, says that:

‘‘ The best mining legislation is that which assures to the exploiters the greatest security in possession and the most freedom ; property in mines should be irrevo- cable and perpetual in the hands of the private persons who have carried on the explorations. Exploitation by the proprietors should not be compulsory ; this will induce them either to abandon the investigation of mines or to the wasteful mismanagement of mineral-deposits, of which it is necessary that a nation should always have an abundant known reserve.”

The law of 4th June, 1892, is founded, as has been seen, on these very principles, and the results obtained can already be appreciated.

I here end this paper with great regret for my inadequate response to the honor conferred upon me by the invitation to prepare it. And I can only beg the honorable Minister who thus distinguished me, not to doubt for a moment my lack of endeavor — this has not been wanting. The cause of the in- completeness of the work has been only my own incompetence and the limited time at my disposal.

The value of the gold is expressed in Mexican money, the legal value of a kilogramme being, as is known, equal to $675,416.

The Sierra Mojada And Its Ore-Deposits.

The Sierra Mojada, Coahuila, Mexico, and its Ore-Deposits.

Discussion of the Paper of James W. Malcolmson (see p. 100).

(Mexican Meeting, November, 1901.)

S. F. Emmons, Washington, D. C. : Mr. Malcolmsons paper on the intensely interesting deposits of the Sierra Mojada creates a strong desire to visit the region so well described. Although it is difficult to intelligently discuss a locality that one has never seen, I cannot refrain from offering some re- marks in the nature of a tentative suggestion :

1. Age of Beds, — Mr. Malcolmson speaks of the enormous thickness of limestone forming the Sierra Mojada as belonging to the Carboniferous series. If this is not a typographical error, it seems that he should present some evidence for such age, for Chism,* in his previous article on the district, says the only fossils found there were said to be Cretaceous ; and it is well known by the investigations of R T. Hill and others that the great thickness of limestone in this part of Mexico is of Cretaceous age.

2. Strueiiire of Mountains, — Mr. Malcolmson presents good reasons for thinking that the structure of the two related mountain masses (Sierra Mojada and Sierra Planchada) is not the simple anticlinal fold given by Mr. Chism’s section, it being evident that there has been faulting as well as flexure,

I venture to add that the facts presented by Mr, Malcolmson seem to suggest the possibility that, instead of being simply an eroded anticline, the valley between the two ranges may have been formed, in part at least, by the irregular faulting down of the intermediate block, on the surface of which the volcanic breccia had originally accumulated at a higher level. The sections of the Exploradora and the San Jose mines, in the smooth surface of the contact, with clay selvages and the occa- sional slickensides, certainly suggest a structural fault between the limestone and breccia. The arrangement of some of the

Ti'ans. XV., 542.

THE vSIERRA MOJADA AXH ITS ORE-DEPOSITS.

ore-bodies od lines parallel with the contact otfers the same suggestion.

The existence of faults in the limestone at right-angles to this contact is quite in consonance with this hypothesis. These phenomena and the distribution of the ore-bodies resemble the manner of the occurrence of the ore and limestone on one side of the great fault-fissure in the Globe district of Arizona.

It is more difficult, it is true, to account for the nearly hori- zontal position of the contact in the Dionea and other mines; but these are at some distance out from the vertical cliffs which would approximately correspond with the steeper part of the fault-plane. In the great landslip areas in the San Juan mountains, near Telluride, Colo., Mr. Cross has shown that, where masses several miles in extent have slipped down from the sides of the mountains, the plane of movement is a curved surface passing from a vertical nearly to a horizontal position. And it seems possible that in the Sierra Mojada the faulting may also have been in the nature of a landslip, though of much more ancient date and obscured by subsequent geological action.

3. Distribution of the Ores . — In the alteration of sulphides to oxides and carbonates, especially where the alteration is so thorough and deep-seated as it is in arid regions like Mexico, there is apt to be much actual migration and redistribution of the material during the process. This fact is evidently recog- nized by Mr. Malcolmson, though he does not discuss it in as much detail as could be wished.

This secondary migration is likely to be more or less propor- tional to the relative solubility of the sulphates of the respec- tive minerals ; thus the lead would have moved but little from its original position, the silver more, and the copper and zinc most of all. Hence, the lime impregnated by silver chlorides beneath the lead-deposits, described by Mr. Malcolmson, seems quite normal. The contact-deposits of copper-ore in the San Jose mine, in being placed above the lead- and silver-deposits, would appear to be in abnormal conditions. It is possible that they may be the product of the leaching of some overlying pyritous deposits now eroded away. A detailed study of these deposits from the point of view of secondary migrations would be extremely interesting, and probably Mr. Malcolmson may be .able to add something in this line to his already valuable paper.

Gems And Precious Stones Of Mexico.

Gems and Precious Stones of Mexico.

Discussion of the Paper of George F. Kunz (see p. 55).

(Mexican Meeting, November, 1901.)

Edward False, Puerto Berrio, Colombia, S. A. (communi-- cation to the Secretary) : I have read with much pleasure the interesting and valuable paper by Mr. Kunz, and hope that the following brief notes, gathered a few years ago, while a resi- dent in Mexico City, may help to elucidate the subject:

Turquoise. — This was known to the Aztecs as Xihuitl. Santi- ago Ramirez states that they found it in the Cerro Xicohtzonc, close to Atzcapatzaleo, a suburb of the City of Mexico (com- pare page 59).

Oal . — This was known to the ancient Mexicans, for they named it Mezcuiilatl (compare page 63).

Jade. — Under this was included a third mineral, prehnite,. not mentioned by Mr. Kunz. According to James D. Dana, part of the jade of China is prehnite; and Humboldt informs us, in his work on Few Spain, that the same species of jade is known in some parts of Mexico as mahagua {majagua ?). The same writer says, in his Views of the Cordilleras that the Aztec name Tecpatl included flint, hornstone, and green jade; and finally, in his Travels in South America he discusses the nature of the ancient amazon-stones, and declares them to have been made out of a jade resembling ‘‘ compact feldspar/’ one of the constituents of the gabbro verde di Corsica. Hence those stones were probably composed of nephrite. According to Humboldt, the form given to them most frequently is that of the Babylo- nian cylinder, longitudinally perforated, and loaded with in- scriptions and figures. They were also cut by the natives into very thin plates, perforated at the center, suspended by a- thread, and worn as amulets.

According to the historian Clavijero, the specific name given by the Aztecs to the nephritic stone (j ad cite) was Quitzalitztli.

Edition of T. Eoss, London, 1881, vol. ii. , pp. 395-399.

Gems Axd Precious Stones Op Mexico.

altliougli, undoubtedly, as Mr. Kunz has shown, it was included, among other green stones, in the more general term Cliakhi- huitl (the Chalchidies of Prescott).

Obsidian. — Mr. Kunz says this name is a nahuatl or aborigi- nal Mexican one. But the word is clearly not of Mexican origin. Ceesalpinus derives it from Obsidius, a Eoman, who first brought it from Africa. Clavijero gives, as the Aztec name for obsidian, Itzili. sometimes written and, in some

States of the Republic, Ixtete. According to Orosco y Berra, it is the Tzinwpu of the Tarascans ; and, it may be added, is identical with the JEsponja of the Incas.

Santiago Ramirez names the following varieties of this rock : ohsidiana dorada ; o.plateada ov argentina ; o.negra; o.azulada; 0. verde ; o. roja or de Penjamo, The last was much prized by the ancient Mexicans, as fragments of it are found in their coesillos or tombs.

Ezequiel Ordonez* describes two petrological varieties of obsidian, one trachytic and the other perlitic. The former is rare, and the latter may be confounded, at first sight, with the trachytes (chiluca) of Los Remedios.

Boletin del Instituto QeoUgico de Mexico No. 2. “Las roeas eruptivas del S. 0. de la Cuenca de Mexico,” Mexico, 1895, p. 41 .

A

Glossary

Of

Spanish-American Mining And Metal- Lurgical Terms

Compiled By

Arthue S. Dwight

San Lms Potosi Mexico

Assisted by Many Membees op the American Institute of Mining Engineers

Published By The Institute New York City

INTRODUCTIOxN.

The labor of compiling this Glossary was undertaken at the request of the Secretary of the Institute, for the purpose of appropriately supplementing the literature called forth by the visit of the Institute to Mexico. To this end, a circular letter was addressed to all members of the Institute, requesting the contribution of Mexican or Spanish mining and metallurgical terms, and a sufficient number of responses were received to make it possible to prepare a “Preliminary Proof Edition ” in time for distribution at the Mexico Meet- ing, As this had to go to press without proper revision or proof-correction, it is not surprising that it contained many errors. Most of these, it is hoped, have now been eliminated, while about six hundred definitions have been added.

There is no doubt that the list can be considerably increased with advan- tage, and supplementary lists may possibly be issued from time to time in which shall appear additional terms and corrections based upon further con- tributions and criticism by competent persons. That there is a large and in- creasing number of technical men in professional or commercial relations with Spanish* speaking countries who would appreciate a good technical glossary, there can be no doubt.

The compiler lays no claim to authority as a lexicographer, but the editorial work of selection, simplification and condensation has been performed con- scientiously in the face of many inconsistencies in the matter contributed. All doubtful questions have been settled according to the judgment of the compiler, after consulting all published authorities at hand, and aided by the friendly counsel of Mexican engineers. Some of these decisions may, how- ever, he subject to further discussion and revision.

It will be noticed that mining terms are more largely represented than metal- lurgical. This is accounted for by the fact that while Mexican mining methods and corresponding technical terms have, to a large extent, retained their ex- istence and individuality, the ancient processes of reduction, with the marked exception of the paiJw process of amalgamation, have been so largely displaced in recent years by American methods as to make, in most cases, the technical terms of present practice simply obvious translations, more or less felicitous, of their English synonyms. Such self-explanatory terms have been gener- ally omitted.

Many mining terms have different meanings in different districts of Mexico, but it has been thought best not to attempt to specialize too closely, and in a few instances only have Mexican localities been indicated. The rapid growth of the railroad systems will soon obliterate these differences, and the most convenient terms will survive.

This being essentially a Glossary of Mexican Terms, all those defined may be presumed to be in use in Mexico, unless accompanied by a special designa- tion, as Spanish (Sp.) or (Peru). The latter sign is attached to many Peru-

Introbuctiojt.

vian words contributed by Mr. Otto F. Pfordte, while the former refers to a number of terms well-authenticated as to general use in technical literature but not positively known to be current in Mexico.

The Spanish alphabet recognizes “ ch ” as a distinct character, but as it is somewhat more convenient to English readers to use the same sequence of letters as in English, this liberty has been taken in the arrangement of the Glossary, following the respectable precedent of the well-known Velazquez Spanish and English Dictionary,

“LI” and “fi” are, however, treated as separate characters.

To repeat the rules for pronunciation and the use of the accent mark, seems hardly necessary in a work of this kind ; but, as there actually is some disagreement among authorities as to the use of the accent, it may be proper to state that the procedure followed in this Glossary is in accordance with Wm. L Knapp’s Spanish Grammar,, Boston, 1900.

The list of those who have rendered assistance in this work comprises :

Kichard E. Chism, Mexico City; A. W. Jenks, Mapimi, Durango; Bertel Peterson, Torres, Sonora; Charles H. McMahan, Sombrerete, Zacatecas; Otto F. Pfordte, Eutherford, N. J. ; Gustav Thorkildsen, Mexico City ; Edward C. Knight, Monterey, Nuevo Leon ; W. B. A. Dingwall, Matehuala, San Luis Potosf; Edmund Girault, Mexico City ; E. D. Self, Linares, Nuevo Ledn ; John Gross, Sombrerete, Zacatecas; Eugene A. H. Tays, San Jos6 de Gracia, Sinaloa ; Carlos Eiedt, Mapimi, Durango ; Eoberto Tpina, San Luis Potosf ; J. D. Eobertson, Coalcom4n, Michoacan ; J uan C. Eodriguez, Saltillo, Coahuila ; Adolfo Martinez, San Luis Potosf ; Henry F. Collins, London ; John A. Church, New York City ; Caspar Wistar Haines, Eich- mond, Ya. To these names that of Mr. Carlos F. de Landero, of Pachuca, Mex., a Vice-President of the Institute, should be added with special ac- knowledgment of his generous aid in the revision of the Glossary.

Published works consulted :

1. Apuntes de Minerfa en forma de Diccionario para el Minero Practice. Felix Nieto, Zacatecas, 1891.

2. Dictionary of Terms, English, German, Spanish, French. Max Venator, Leipzig, 1897.

3. Technological Dictionary. Ponce de Leon, New York, 1893.

4. Glossary of Mining and Metallurgical Terms. E. W. Eaymond, New York, 1881.

Glossary.

Abaeo. A stone trough used to wash minerals.

Abajador. The workman in charge of tools furnished to miners un- derground.

Abigarrado, Variegated in color (applied to minerals).

Abra. Open fissure or cavity in the rocks.

Abrazador. Clip.

Abridura. Enlargement of a space, so that miners may work freely.

Abrigo. The width of a vein.

Abronzado. Chalcopyrite.

Aearreo. Transportation ; hoisting.

Acarreos. Float-rock,

Accion. Share in a mine, or other enterprise, usually 100 to the harm. Eight or ground of ac- tion in a suit.

Aecionista. Shareholder.

Aceitera. Oiheup.

Acendrar (Peru). To refine.

Acequia. Canal or ditch.

Acerado, Gray copper-ore. Any

gray steely ore.

Acero. Steel. colado. Cast

steel.

Achaparera. Long-handled adze.

Achicador, or Achichinque. Car- rier of water. (See AcMcar.)

AcMear. To remove water from a mine, generally by carrying it out in bags or buckets.

Acido. Acid.

Acomodana (Peru). Ore-deposit.

Acre. An acre. Sour.

Activar. To quicken the chemical reactions in the torta.

Acueducto, Aqueduct.

AcuUico (Peru). Eesting-hour.

Acimar. To coin. To wedge,

Vol. Xxxii.— 34

! Acuoso. Watery.

I Adarme. A weight for gold and sil- I ver, about 1.8 grammes. Penny-

I weight.

Ademador. Timberman.

I Ademar. To timber.

I Ademe. Timber in mines. Timber- ! ing in general,

i Administrador. Manager of a mine.

I Adobe. Sun-dried brick.

Afiladera. Whetstone.

Afilar. To sharpen (tools). Afinacion. Art or process of refin- ing. Eefining works.

Afinador. Eefiner.

Afinar. To refine.

Aflojadero. Soft part of a vein. Afloramiento. Outcrop of vein. Afrechera (Peru). Finely-divided amalgam produced with insuf- ficent mercury.

Agachadero. Place in a level, where roof is low.

Agrim en sor. S urveyor.

Agua. Water. fuerte. Nitric

acid.

Agua magnetica. Magnetic needle. Agujero. Drill-hole.

Agujon, Surveying-instrument with compass.

Aguzar. To sharpen (drills). Ahondar. To sink.

Ahonde. A shaft to establish mining title.

Aire. Air.

Ajuste. Contract; Adjustment (of parts of a machine).

Ala de mosca (Peru). Granite or very hard rock.

Alajites. Altered rhodonite. Alambre. Wire.

, Alarife (Sp). Mine mason.

576 aLOSSAKY of SPAKISH-AMERICAN MI2saNG- TERMS.

Albanil. Mason.

Albayalde. White lead.

Alcali. Alkali,

Alcance. Balance due.

Alcancia. Loading-chute. AlcaatariEa. Culvert.

Alcaparra, or Alcaparrosa. Efflor- escence (of sulphates, etc.) in old workings.

Alcarraza. Water-can used in drill- ing.

Alcribis. Tuyere. (See also Toheva.) Alear. To alloy.

Alimentador. Ore-feeder.

Alipus. (xad.

Almacen. Warehouse.

Almadeneta. Stamp-head or shoe. Almagre. Bed ocher.

Almartaga (Peru). Litharge. Alquitraa mineral. (See Betwi.) Alsa (Peru). Boof of underground level, gallery, etc.

Alto. High. Hanging-wall. (See also Respaldo.)

Aitnra. Height ; altitude.

Aludel (Sp.). Earthen condenser for mercury.

Alumbre. Alum.

Aluvion. Alluvium .

Alzador. Workman employed in loading wagons, etc.

Amalgama. Amalgam.

Amalgamar. To amalgamate, Amatista. Amethyst Ambar. Amber.

Amianto. {See Ashesto.) Asbestos. Amojonar. To set monuments or landmarks.

Amoniaco. Ammonia.

Amorfo. Amorphous.

Amparar. To cover (title). Ampliacidn. The enlargement of a mining claim.

Ampollosa. Bock structure, contain- ing cavities.

Analizar. To analyze.

Ancla. Anchor ; hook.

Ancon de tierra. Projecting or sa- lient corner of a claim.

' Andamio. Builder’s jack. Scaffold.

, Anden. A path for horses around the shaft. BB. station platform* Andesita. Andesite.

Anegada. Browned. Overflowed.

Left to fill with water, j Angulo. Angle.

j Anillo. Bing ; collar ; loop on the I end of a rope.

Anillos. Set of shaft-timbers; shells for crushing-rolls*

Anodo. Anode.

iAnqneria (Peru). Silver-ore look- I ing like cubical galena,

i Anquerita. Ankerite.

Antimonio. Antimony. bianco.

Valentinite. rojo. Kerme-

site.

Antraeita. Anthracite.

Apagar (im homo). Blow out a fur- nace.

Apalancar. To move with a lever. Aparador. Be-worker of tailings from silver mills.

Aparato. Apparatus.

Aparejo. Pack-saddle. Any rough apparatus for moving heavy tim- bers, etc.

Apartado. Ore-separation or con- centration. Parting gold and sil- ver. The place where this work is performed.

Apartador. Hand-sorter of ore. Apelmazado. Compressed ground. Aperador. Store-keeper.

Aperos. Mining supplies.

A pique. Vertical.

Apique. Shaft.

Apires (Peru). Ore-carriers in mines. Aplanador. Blacksmith’s flatter. Apolvillados. Ores of superior grade, Arcilla. Olay.

Areilloso. Argillaceous.

Area. A square of 10 meters.

Arena. Sand.

Arenillas. Tailings; refuse earth.

Sand-carbonates.

Arenisca. Sandstone.

Arenoso. Sandy.

Glossary Of Spakish-American Mixing Terms.

Argamasa. Lime mortar.

Arista. The intersection-line of two planes.

Armar. To erect or fit up machinery, etc.

ArmazoE, Armadura. Any framed structure, truss, trestle, etc.

Arrastrador. Slag-pot puller.

Arrastrar. To drag along the ground.

Arrastrar el agua. To almost com- pletely unwater a working.

Arrastre. A circular trough in which drags are pulled around for grind- ing and amalgamating ores.

de cncliara. Arrastre driven by rough impact water-wheel, the blades of which are called “ cu-

charas. ’ ’ de marca. Large

arrastre. de mula. Mule-

power arrastre,

Arreador. The mule-driver on a hoisting-whim.

Arrebol. The jerking of a rope as a signal to miners underground.

Arriero. Muleteer.

Arriionada. Botryoidal.

Arroba. Twenty-five pounds.

Arroyo. Gulch. Small stream.

Arsenico. Arsenic.

Asbesto. (See Amiayito). Asbes- tos.

Asentador. Settler.

Aserrar. To saw.

Asfalto. Asphalt.

Asieuto. The concentrate in pan- ning.

Asieuto mineral. Mineral region.

Aspa (Peru). Intersection or junc- tion of two veins. Certain tim- bers used in mines or mills.

Asperou. Sandstone. Grindstone.

Aspirador. Exhauster.

Asta-bandera. Flag-staff.

Atacador. Tamping-bar.

Atacar. To tamp (Peru). To ex- press mercury from a canvas bag by beating it with a stick.

Atajo. Trail.

Ataques. Rubbish.

Atecas. (See AcJilcadores,)

Atierres. Waste-rock and dirt in a mine.

Atincar. Borax.

Atizador. Stoke-bar ; poker.

Atrancar. To drill (for blasting) at a very acute angle.

Aturdir. To subdivide, mechanically, the quicksilver in a torta so as to quicken its action upon the mineral treated.

Auquis (Peru). Rock-drillers in mines.

Aurifero. Gold-bearing.

Avena. Oats.

Aviador. Furnisher of funds to work a mine.

Avio. Money furnished by an Avia- dor.

Ayate. Coarse fiber-cloth for carry- ing ore, dirt, etc.

Ayuda. A small bonus to tributers who fail to make expenses. Met-

ales de . In smelting, lead-

ores.

Ayudante. Assistant.

Ayunque (or Yunque). Anvil.

Azabacbe. Jet.

Azarcon native. Minium.

Azimut. Azimuth -bearing.

Azogado. Poisoned by mercury.

Azo gue . Q uicksil ver .

Azogueria. Amalgamation. A store- house for quicksilver.

Azoguero. The “ mud- chemist ” (also, the metallurgical foreman) in a patio-works.

Azogues. Free-milling os. Com- mon name for third-cMss silver- ore, generally carrying 35 to 1 50 oz. per ton, which will pay for mining and shipping.

Azuela. Adze.

Azufrados (Peru). Sulphide-ores.

Aziifre. Sulphur.

Aznfrones. Sulphide ores.

Azulaques. Finely disseminated ore. An impregnation of decomposed sulphides staining the gangue.

578 Glossary Of Spanish-American Mining Terms.

Bagazo. Waste from liand-jigging Mud from drill-hole.

Baja de metales (Peru). Lowering of ores from mine to mill.

Bajo. Foot- wall (See also Respaldo,)

Balanza. Small scales.

Balanzon. Mainbeam or balance- bob of a Cornish pumping-engine.

Balsa- Movable platform suspended from cable. Pool of stagnant water in a mine.

Banco- Crucible of blast-furnace. A ‘ ‘ horse. ’ ' A “ cross-course. ’ ’

Banco de herrar. Horseshoeing shop.

Banda. Belt.

Bandeada. Banded structure of veins.

Bandera. A flag used in surveying to mark points.

Bartoiina. Mine entrance.

Bano- Excess of mercury added to the toi'ta to collect amalgam.

Barba. Fire-bridge.

Barilla. V egetable alkali. Alkaline ashes. Grains of native copper found in certain ores. Native copper concentrates.

Bario. Barium.

Barbmetro. Barometer.

Barquin. Bellows.

Barra. Bar or ingot. A share in a mine. (The ancient Spanish laws considered a mine as divided into 24 parts, each of which was called a harra. Barras viudas or avi- adas are non-assessable shares, which participate in the profits, but not in the expenses of min- ing.) azuela. Bar with

chisel-bit. de plata. Silver

in bars. pica, or de

pimta. Bar with diamond-shaped

point. de uha. Claw-bar

for spikes.

Barranca. A ravine or gulch.

Barrena. A hand-drill for blasting,

viva. A sharp drill.

muerta. A dull drill.

Barrenar. To drill. To fire a round of holes.

Barrenarse. To connect with each other (a& two mines or workings).

Barreno- A drill-hole. A communi- cation between two workings.

de agna. A downward hole.

en seco. An upward hole.

Barreta. Crowbar.

Barreta perdida (Peru). Dead- work in unprofitable prospecting.

Barretero. A first-class miner, able to locate, direct, drill and knows how to blast holes, and to work gad, etc.

Barril. Barrel.

Barro. Clay.

Bartoiina. Watchman’s house at mine-entrance.

Bascnla. Scale for weighing charges.

Bastimento. Miner’s luncheon.

Basura de plomo. Lead-dross.

Batea. A wide and shallow vessel, usually of wood, used for pan- ning ore.

Bateria. Battery.

Batiboleo. Company of miners work- ing a stope of high-grade ore.

Bazofia (Peru). Waste rock.

Beneficial. To treat ores for extrac- tion of metallic contents ; to bene- ficiate.

Beneficio. Metallurgical process.

Berilio. Berillium.

Berilo. Beryl.

Betnn. Bitumen.

Bicharra (Peru). Small furnace with inclined stack.

Bigornia. (See Yunque.) Anvil.

Bimbalete (Peru). Crude ore-mill operated by two men. The grinder is a large stone with ti'ansverse bar by which a rocking motion is- given. (See also Quimhalete . )

Bismnto. Bismuth.

Bitnminosa. Bituminous.

Blenda. Zincblende.

Boca. Mouth of mine or tunnel, es- pecially the place generally used as an entrance. Head of a stull or post. Heavy horizontal brace.

GLOSSARY OF SPAXISH-AMERICAK MimSG TERMS. 579

Boca de barrena. The bit of a I Braguetiila (Peru). Smeltiog-fur- drili I naee ; the simplest being merely

Bocarte. Stamp-battery. 1 a hole in the ground.

Bochorno. Excessive heat, with lack Brecha. Breccia.

of ventilation. (See Vapores.) Brillo. Luster.

Bodoqne. Argentite. Broca. Drill-bit.

Boina. Miner’s cap. Bromo. Bromine.

Bola de grasa. Slag-ball. Bronce. Iron or copper pyrites,

Boleo. Dump for waste rock. Float- Bronze. fosforado. Phos-

mineral. A kidney of ore. phor-bronze.

Bolicbe, Dolly-tub (Peru). Small ' Bronco. Wild, loose. Boof-rock, ore-mill like a Qidmhahte. liable to fall.

Bollo (Peru). Pocket of ore. Tri- Bronquear. To hammer or pry with angular block of amalgam. hammer or gad in rock which is

Bolsa. Pocket ; small bunch of ore. ' loose and liable to fall.

Bolson. Pocket of ore. Large cir- Brossa (Batopilas). Eich ore con- cular valley. i taining two-thirds silver.

Bolsonadas (Peru). Pockety veins. ! Brotazon de veta. Apex of vein ; Bomba. Pump. i croppings.

Bombillo. Cartridge (as of dynamite). ! Broza (Peru). Very poor ores which Bonanza. Literally, “fine weather.” generally do not repay extraction.

In mining, rich ground. j Brujnla. Magnetic compass.

Bonete. Hat used to catch very rich i Bnfa. Cliff.

ore as it is picked down with aiBuitron (Sp.). A silver-furnace of sharp bar. j peculiar form. (Mex.) Fire-box.

Bonito. First class silver-ore, i.e.,- (Peru) Sump of masonry for

assaying over 1000 oz. per ton.

Bordo. Pillar left to support vein- matter. Block of ground ready for stoping.

Bornita. Bornite.

Boro. Boron.

Borra. Yein-matter. Lead-dross.

Barren vein-matter or rock.

de veta. Soft rotten rock.

en borra. Same as horrusca.

Borrasca. The opposite of Bonanza. When the mine has a vein, but no ore, it is said to be hor- rasca. ’ ’

Bosque. Forest, grove.

Bota. Bucket made of entire ox- skins, to take out water.

Bote. Boat, can, ore-bucket.

Boveda. Flueleading to stack. Arch.

Bovedas (Mex.), or Bovedones (Pe- ru). Large vaulted stopes or caves.

Boya (Peru). Eich vein or pocket of ore.

settling pulp after grinding and before taking to patio.

Bujia. Candle, candle-power.

Buque. Boy employed in a mine.

Burbuja. Blister.

Burrero. Donkey-boy.

Burro. A windlass. A donkey. A carpenter’s horse.

Busca. A quantity of ore extracted by a eampem or huscon.

Buscbnes. Miners working in aban- doned mines either to get and sell ore, or to obtain a reward for some valuable discovery. Pros- pectors. (See Camperos.)

Cabeceado. End-line of claim (bid).

CabaUeriza, Stable.

Caballete. Eidge-beam, trestle, etc.

de tension. Tension-sta“

tion of cable-tram.

Caballo. IVIiners’ . candlestick. “Horse.” Cross-course. Eope sling for lowering men in shaft.

580 Glossaby Of Spanish-Aiierican Mining Terms.

Cabecera. Heads ” in concentra-

tion,

Cabeza. Head or end. de in-

genio (Peru ). Shaft of a vertical water-wheel.

Cabezada. End- piece in shaft- tim- bering.

Oabezal. Cap in timbering.

Gabezuela. Eich concentrates, usu- ally containing both gold and silver. 3Iineral crushed to less than i in. in diameter.

Gable. Cable or hoisting-rope.

deporte. Carrying rope.

de traccion, de motor, de mo- vil. Traction-rope ; traveling- rope.

Cable- via aereo. Aerial cable tram- way.

Cabrestante. Capstan, winch.

Cabo. Handle. Stump of candle. Sub-foreman or “boss.”

Cacbetear. To loosen a gad by striking it alternately on each side,

Caebi (Peru). A “Quechua” word, meaning salt ; also applied to all kinds of white gangue-rocks.

Cacbueba. Miner’s cap.

Cadena. Chain. A unit of linear measurement.

Cadmio. Cadmium.

Caducar. To forfeit a title through non-compliance with the stipula- tions contained therein.

Caducidad. The act of forfeiting at title, etc. (as above).

Gaer de Cruz. The beginning of the action of the quicksilver in the process of amalgamation.

Caido. A fall of ground.

Caiman. Ore-shoot. Stilson wrench.

Caja. Case; box. Water-jacket of furnace. Housing of crusher.

cbica. Furnace-tap jacket.

fundida, quemada.

Burnt-out furnace-jacket.

Cajas (Peru). Yein-walls.

Cajete. A masonry basin to receive the pulp from an arrastre. f

Cajon (Peru). Box ; caisson. Load of about 3 tons (variable in dif- ferent localities). Shoot. Drain. del tiro. Shaft- compart- ment.

Cajonero. The man who receives, registers and distributes the mine- cars at the shaft-mouth.

Cal. Lime.

Gala (Sp.). Prospecting-pit

Calabrote. A rope of large diam- eter.

Calamaeo. Large piece of rock, dif- ficult to break up.

Calavera. (See Calamaeo.)

Calcar. To make a tracingof a draw- ing.

Calcareo. Calcareous.

Calcedonia. Calcedony.

Calein. Boasting-furnace.

Calcinar. To calcine or roast.

Calcio. Calcium.

Calco. A tracing on cloth or paper,

Caldear. To glow with heat.

Caldera. Steam-boiler.

Calderista, or Calderero. Boiler- maker.

Calecero. Man who rides on hoist- ing-cage and gives the signals.

Calentadura. The first bar of lead treated by a lead-refining furnace.

Calentar los euerpos (Peru). The turning yellow of mercury in patio-amalgamation.

Calera. Lime-kiln, calcining furnace.

Calero. Lime-burner. Boaster-man.

Calesa. Buckets for ore or water.

Calicanto (Mex.). Masonry work (Peru). Auriferous conglomerate in Chuquibamba, Peru.

Caliebal. Second - class silver - ore (carrying from 150 to 1000 oz. per ton).

Caliche. Feldspar. Travertine ; al- most any lime carbonate not crystalline or stratified (Peru). Whitish clay in the selvage of veins (Chili). Crude nitrate rock.

Caliente. Hot. The condition when mercury flours in amalgamation.

Glossary Of Spaxish-Americax Mixixg Terms.

Caiiza. Limestone, i Caparrosa. Yitriol ; copperas.

Oalza. Shim ; liner. j Capela. Strap passing over a man’s

Galzar. To sheathe or face with shoulders from handles of a wheei-

metal. To shim ; to tamp. barrow.

Callapos (Peru). Kude wooden steps ' Capellina. Oid-fashioned bell retort at the mouth of a mine. I for silver amalgam.

Camhiar. To switch. Caperuza (Peru). Iron or earthen

CamMa-vla. Turn>table ; man who . cjdinder, placed over amalgam in operates switch. . distilling, so that the open lower

Camhio, Switch. j end is in water, into which the

Camino. Road ; gallery or shaft in a j condensing mercury drops.

mine, used for general traffic. ; Capitan, or Capataz. Mine-captain.

Camino de rieles. Track. de patio. Surface-boss.

Camon. Iron tire of mill-wheel. Caponazo. Blow on the hand of man

Campana. Bell. CapeUina.) ; holding drill, due to fault of striker. Campanela. Upper drill-hole. j Capote. The bell-shaped iron cover Campanero. Bell-man, or station- fitting over the capellina, in re- tender. torting, to confine the heat.

Campero. The foreman in charge of Capsnla. Blasting-cap.

Campos. Miners working on , Cara. Facet of crystal.

tribute. Carbon, or Carbon de leha, vejetal.

Campo. A limited lease of a small Charcoal. de piedra. Min-

section of ground in a mine. Min- 1 eral coal.

ing camp. {See Eeal.) Carbonate. "Carbonate.

Canal. Channel. Spout. de Carbonero. Coke- or coal-wheeler.

humo. Flue. Carbonifero. Carboniferous.

Canasta. Basket. Carbono. The element carbon.

Canastillo. Tramway-bucket. Carburo. Carbide.

Caneba (Sp.). Place for drying Carcamo. Calvert. Pent stock of slimes or sorting ore. Mine dump. turbine.

Canchero (Peru). Person in charge Carceles. Hitches or steps for tim- of dumping and sorting of ores. hers.

Candelero. Candlestick. Part of Cardenillo. Ruby-silver. Verdigris drill-hole remaining after blasting or carbonate of copper.

(Peru). Piece of clay on which Carga. A charge, as for a furnace, retort-silver is laid for final heating A mule-load, generally of 300 Ihs.

Candil. Oil-lamp. Avoir., but variable in different

Cantera. Building-stone. Quarry. places. dearrastre. Charge

Canto. Narrowest face of a tim- for an arrastre ; usually about 200 her. de canto. Edgewise. lbs. Avoir.

Canada. {See Barranca.) Cargador. Feeder of a furnace. Ore

Canamo. Twine made of hemp. carrier. Porter.

Canon. Gorge, precipitous ravine. Cargar. To charge a furnace.

Mine-level, drift or gallery. Cargo (Peru). The first portion of

de guia. Drift along the vein. mercury added to an amalgamat-

Cannela. Fuse. ing-charge.

Capa. Flab deposit of ore or capping Carguero. Charger for a furnace.

of lava, clay, etc.; stratum. Came de vaca (Peru). Coarse- Capacho (Peru). Leather hag for grained galena, generally mixed carrying ore. with gray copper-ore.

582 Glossary Of Spanish-Americay Miniisg Terms.

CarraEa (Peru). Light rawhide shovel for throwing taqiiia into a furnace.

Carrascal. Honey-combed quartz, generally barren.

Carrera. Stroke — as of a piston.

Garrero. Charge-wheeler. Trammer.

Carretilla- Wheelbarrow.

Carrillo. PulIe 3 -bloek.

Carrizo. Small hole in rock for wooden ping, (iklso, seeGiocohn,)

Carro. Charging-buggy. Mine car.

Cartucho. Explosive cartridge.

Casarmetales (Peru). To mix ores for amalgamation or smelting.

Gascajo. Gravel. Waste rock. Oxi- dized free-milling ore.

Casiterita. Oassiterite.

Casquillos. Blasting-caps.

CasteEano, A small furnace about 48 inches high, 10 inches square, used for lead-smelting, probably introduced by the Spaniards.

Castigar. To smooth or plane sur- faces of rocks or boards.

Castillo. Gallows-frame.

Cata. Prospect-hole, or pit.

Catar, or Catear. To prospect.

Cateador. Prospector.

Cauce. Biver, water channel. Bed of a stream or river.

Cazadera. (See Cdrceles.)

Cazar. To ram with a piece of timber.

Cazeador (Sp.). Amalgamator.

Cazo. A vessel for hot amalgama- tion. Any large copper or iron vessel.

Cebar. To melt rich ores, or lead bullion, etc., in a smelting fur- nace. To add small quantities of material, from time to time, to the bath in a furnace. Generally, to feed any kind of metallurgical machinery or process.

Cedazo. Screen or sieve. (See (7n5a.)

Ceja. In vanning with horn spoon or miners’ pan, the heaviest streak or concentrate that appears at the edge.

Celasa. Cage.

CemeEto or Cimento. Cement.

Cendrada. The cupel-hearth of a fur- nace in which silver is refined or rich lead cupelled. Made of fineb- pulverized elaj’ or other absorbent earth, mixed with ashes of bone or wood.

CeEdradiila. A small reverberatory in which rich silver ores are crudeb smelted. Also called Gnleme.

Ceuicera. Ashpit.

Ceuizas. (Literally, ashes.) Gray

silver-mineral. de huesos.

Bone ash.

Centro. Center.

Cedido. Narrowed.

Cepillo. Brush. cMco. Shaper.

grande. Planer.

Cepo. A notch in wdiicli timber is fixed.

Cerargirita. (See Plata cornea ) Cerargyrite.

Cerio. Cerium.

Cernidor. Moving screen ; trommel. Cerro. Hill

Cerusita. Cerussite.

Cesio. Cmsium.

Chacnaco, Cupel furnace with ab- sorbent lieartb.

Chacurruscar (Peru). To mix sev- eral kinds of ore.

Chaiian. Inclined winze ; bevel

ChalcMhnitl. Any green precious stone.

Chalcopirita. Ohalcopyrite.

Chalcosina. Sulphide of copper.

Chamuscar (Peru). A superficial roasting or calcination, to facilitate the grinding of ore.

Chancar (Peru). Cobbing of ores.

Chapa. Metal plate, a lock. Foli- ated structure.

Chaqueta. Furnace-jacket.

Chaquiris (Peru). Ore-carriers in mines.

Charco. A pool of water.

Charqueador. The striker in two- handed drilling. The helper who, under the old system, sorted the

Olossaet Op Spaisish-American Miking- Terms.

material from ground worked down by the miner. (See AcM- cador.)

Charquear. To dip out water from pools within a mine, throwing it into gutters or pipes which will conduct it to the shaft. (See AcJncar.)

Ghiiiadero. Ore-hopper.

Chiflarse. To waste itself (as the force of an explosion, through a fissure in the rock).

Ghiflon. A narrow drift directed ob- liquely downwards. Any pipe from which issues water or air under pressure, or at high ve- locity. A strong draft of air.

Ghile (Peru). Greatest depth of a mine.

GMleno. A Chilian mill.

Ghiiuca. A variety of porphyry.

GMmenea. Chimney , smokestack ; vertical shaft.

GMngarse. (Peru.) To be cut ofif, or to “peter out” (of a vein).

Chiquihuite. Ore-basket.

Chispa. Spark. Ore containing visi- ble gold. A nugget.

Ghispeada (Batorilas). Kich silver- ore with one-third silver.

GMspiador (Peru). Gold-washer in river placers.

GMva. A bar with claw for drawing spikes-

Ghiviar. To hunt for broken ore in waste.

Ghoclo de oro (Peru). A mass of native gold (say 1 oz. or more) in its matrix.

Ghocolon. The part of the hole re- maining in the rock after a blast. Hitch in the rock.

Glioeii (Peru). Disease caused by inhaling fine mineral dust in stamp-mill.

Gholla. Opening or hollow space. A small space filled with soft ore.

Ghorreadero. Chute for ore. Loose or running ground.

Ghorrera. Ore-shoot ; a run of loose rock.

Ghorro. Spring of water found in mines. Jet or spout of liquid.

Ghnga. (See Fnruna,)

Chnlana. An upper drill-hole.

Chmiiacera. Bearing for the shaft of a machine.

’ Ghumbe. Zincblende.

Chnmpe (Peru). (See Ghnnle.)

Ghiiza. Catch-basin for mercury.

Gianogeno. Cyanogen.

Gianuro. Cyanide.

Cielo. Roof ; ceiling. Trabajar de cielo. Overhead stoping.

Cigiiairo, or Civairo (Peru). Pea- cock-colored.

Cigiiena. Windlass. Crftik.

Cilindrico. Cylindrical.

Cilindros. Rolls.

Gima. Summit.

Gimborrio. (See Cielo.)

Gimbra. Center for arch.

Ginabrio. Cinnabar.

Gincel (Peru). Native silver in large masses. Chisel.

Gincho. Hoop.

Cinta. Streak or ore. Lacing.

para medir. Measuring-tape.

Girco, or Buitron (Peru). Amalga- mating circle.

Gitrico. Citric.

Giva. Stump of candle.

Civairo (Peru). (See Cigiiairo.)

Claco. An old coin equal to 4 of a Mexican reed. (See Tlaco.)

Clapete. Clack valve.

Clavar. To nail ; to drive a stake.

Clavo. Nail. biieno, or rico.

Rich' pocket of ore. de

metal. Ore-shoot: pay-streak.

Clivage (Peru). Cleavage.

Cloro. Chlorine.

Clorurar. To chloridize.

Coagular. To coagulate.

Cobaltita. Cobaltite.

Cobalto. Cobalt.

Cobre. Copper. abigarrado.

Bornite. amarillo. Cop- per pyrites. azuL Azurite.

Glossaky Oy Spanish-Ameeicay Mining Terms.

Cobre is. Gray copper; tetralie-

drite. negro. Black or

blister-copper, roseta.

Bose-copper; ingot-copper.

rose. Bed oxide of copper.

verde. 3Ialaclnte. virgen.

Native copper.

Comer. To eat. alevante. To

break or stope ore. Comerse los pilares. To take out the last vestiges of mineral from sides and pillars of a mine.

; Compacto. Compact, i Componer con madera. To timber

Gobrizo. Ore containing copper.

Cocer metal. To roast ore.

Cochia, or Ncqne (Peru). Crude set- tling-tanks built of stones for pulp, between mill and patio ; Lake.

Coclie, or CocMna. Bock-crusher. A large anvil.

Cochizo (Peru). Gray copper-ore.

Cocimiento (Peru). Obsolete method of extraction by boiling the ores.

Code. Elbow.

Cohete. Bocket ; fuse ; torpedo ; blast-

Cok, Coke.

Cola. Tail. Glue.

Coladera. Bather coarse screen.

Golada. Cast (metal).

Colas. Tailings.

Colero. Boss in charge of peonies.

Colgantes. Hangers.

Colina. Hill.

Colindantes. Neighboring mining properties, not more than 100 meters apart.

Color. Gangue stained with mineral, but not valuable.

Colorados. Bed or oxidized ores (generally colored by iron oxide). The region of a mineral vein which includes the oxidized portion. Gossan.

Colote. A special basket used for handling earth, etc., by carga- dores ; is slung on the hack, and usually provided with a short tail- rope for quick dumping.

Colpa (Peru). Iron sulphate.

Colpas (Chile). Lump-ore.

Columna. Standard for cable-tram- way. Column. Yertical damper.

Comalillo. Damper in a furnace-flue.

Comba (Peru). Sledge for breaking ore.

a mine.

Compuerta. Sluice-gate.

Concavo. Concave.

Concentrador. Concentrator.

Concentradoii. Concentrates.

Concentrar metal. To concentrate ore.

Concoide.Conchoidal.

Concrecion. Concretion.

Conducta. A bullion train. The bullion carried.

Conglomerado. Conglomerate.

Consumido. The mercury consumed and lost in an amalgamation-pro- cess.

Coutacto. Contact.

Coutador. Accounting officer.

Contra. The person who carries away the material dumped at the

mouth of a shaft. canon.

Drift in country - rock, parallel

with drift on vein. cielo.

Top of a drift ; a raise.

mina. Countermine. A commu- nication between mines, or a tun- nel communicating with a shaft. pozo. Upraise. seha.

, Bell-signal.

Contraguia. Movable guide-pulley over shaft.

Contrata. The instrument by which the parties assure the contract.

Contratista. Contractor.

Contrato. Pact or agreement between parties to perform some act; a contract.

Convexo. Convex.

Copador. Blacksmith’s fuller,

Copalillo. Zineblende.

Copela. Cupel.

Copelar. To cupel.

Copelilla. Lead carbonate.

Copella. (See Fella,)

Glossaey Of Spaxish-American Terms.

Cordillera. 3Ioiintaiii ranfre.

Coribronce. Chalcopyrite.

Corindon, or Corundo. Corandum.

Cormaiio. Loading-chute.

Cornamusa (Peer). Earthen retort with movable cover.

Cornea (Peru). Horn-silver.

Coro-coro (Boliyia). Grains of na- tive copper mixed with pyrite, chalcopyrite , etc. (Peru). Crude native copper concentrates.

Corpa (Peru). An ore containing galena, gray copper and native silver. Sulphate of iron.

Corral. Stableyard or enclosure.

Correa. Leather strap.

Corrido, The strike of a vein.

Corriente. Current (Peru), All the operations required for extracting metal on a large scale from one class of ore.

Cortafr'o. Cold chisel.

Cortar pilai'. To form a rock sup- port or pillar in a mine.

Cortar sogas. Literally, to cut the ropes. To abandon a mine, taking everything useful or movable.

Corte (Peru), Opening to an ore- deposit, either a shaft or drift. Pay-streak left clear so that ore can be knocked down without be- coming mixed with waste.

Corte de caja. Balance sheet of ac- counts.

Corteza. Crust.

Costal. Sack or bag.

Costalera, Ore-sacks (collectively).

Costeable. Sufficiently rich to pay expenses at least (said of ore, ground, stopes, etc.).

Costearse. To pay for itself

Costo de los jornales. The labor working-cost.

C otenze . Miner’ s sashclo th, or breech- clout. Coarse hempen cloth simi- lar to burlaps. (See Patio.)

Covacha. A cave or crevice.

Coyote. A man who buys and sells mining shares.

Coz. Hitch for stulL

Craza. Vessel to receive molten

metal.

Creston. Outcrop or apex of a vein.

Creta. Chalk.

Cretacio. Cretaceous.

Criadero. A mineral deposit of ir- regular form, not vein-like. A chamber in a vein, filled with ore. Any mineral deposit. This is the more modern sense, and the word is so used in the IMining Laws at present in force in Mexico.

Criha. Screen or sieve. gira-

toria. Eevolving screen or trom- mel. (See Cedazo.) Hand-jig. (See Harnero.)

Cribadores. Ore-screen ers.

Crisocola. Chrysocolla.

Crisol. Crucible. Melting-pot. Slag- pot

Crisolero. Slag-pot puller.

Cristalino. Crystalline.

Cromo. Chromium.

Croquis. Sketch.

Crucero. Cross-cut.

Cruz. Cross. Intersection of two ways. Arms of a scale.

CaudriHa. Gang of laborers ; work- ing company.

Cuadro. Square set. Set of shaft- timbers. (See Marco.)

Cuajado. Bull lead-ore.

Cuarcita. Quartzite.

Cuartea. Work on drill-holes, paid for by the foot, yard, meter, etc.

Cuarto. A shift. primero. Bay-

shift. segTindo. Afternoon-

shift. tercero. Night-shift.

Cuarton. Large boulder,

Cuarzo. Quartz. porfxdico

(Peru). Hornstone.

Cuaternario, Quaternary.

Cubeta. Bucket.

Ctibico. Cubic.

Cubo. Bucket ; the third power of a number.

Cuchara. Spoon. Ladle. Utensil made of horn, in which minerals are washed as a rough test of value (Peru). Blade of water wheel.

586 Glossary Of Spanish-American' Mining Terms.

Gucliarilla. Iron rod. used in drill- ing, to keep a dry hole clean.

CiiCTiruclio. Leather cover to pro- tect miners at work from falling water or rocks.

Cliele. Distance run in tunnel or other work during a certain time.

Cnello. Flange.

Cuenca. Broad valley. Geological basin.

Cuerda. Cord. Limits of a mining property.

Cuero. Hide, Leather bucket.

Cuerpo. Ore-body (Peru). Mass of pulp in process of amalgama- tion.

Cuesco. Coarse ore ; a re-cemented, fragmentary rock.

Ouesta, Declivity. Slope.

Caeva. Cave,

Cumbre, Top , summit.

Cuia. Wedge ; gad.

Cuprita. Cuprite.

Curador. Guardian of property. Trustee.

Curva. Curve.

Dado. Die.

Dar cuele. To drive a level.

Dear respaldado (Peru). To leave valuable ore in the wall-rock.

Bemasia. Unoccupied ground be- tween two mining concessions, less than one pertenencia in extent.

Densidad. Density.

Denuncio. Denouncement; the act of applying for a mining conces- sion under the old mining laws.

Dependiente. Clerk.

Deposito. Ore-bin or large tank.

Derroear. Overthrow.

Derrumbe, or Derrumbamiento. The caving-in of mine- workings. Landslide.

Desaguador (Sp.). Water-pipe ; drain.

Desaguar con bomba. (See Sacar,)

Desague. Unwatering; mine-drainage.

Desatornillador. Screwdriver.

Desbocarse el barreno (Peru). To

remain (as a drill-hole) practically intact after fri ug.

Desbordar. To stope. To rob mine- pi liars.

Desborde. Underhand stope.

Descargar. Literally, to unload.

nn iiorno- To tear down

a furnace.

Descubridora. Discovery-mine ; first mine in a district, or on a mineral deposit.

Besecho. The loss of mercury through chemical reactions during amalga- mation ; lead-dross ; assay waste.

Besengranar. To throw out of gear,

Besierto. Desert.

Besistimiento. The abandonment of a mining claim.

Beslizarse el Azogue (Peru). The flouring of mercury.

Besmoutar. To clear away barren rock or rubbish.

Besmoutes. Poor ores.

Besmorro. Furnace-barrings.

Besnivel. Difference in a level.

Bespacbo. Office. Station. (See Ventanilla. )

Bespajar. To remove waste rock by concentration.

Despaje. Concentration-tailings.

Bespeusa. Store-room, Locked room for rich ore.

Despilar, or Bespilarar. To rob a mine.

Bespoblado. Ore with much gan- gue.

Despoblar. To suspend mining work.

Destajero. A contractor for piece- work.

Destajo. A contract Piece-work, as distinguished from time-work,

Diabasa. Diabase.

Diablo, Eail-bender. Kind of barrow used for moving heavy weights.

Diamante. Diamond.

Diametro. Diameter.

Dibujo. Drawing; design.

Biente. Tooth. Binding-stone in Mexican masonry. (See Tizo7i. )

DiMr. To dilute.

Glossary Of Spanish-Ameeican Mixing Teems.

58T

Bimorfo. Dimorphous.

Diiiamica. Dynamics.

Dmamita. Dynamite.

Dinamo. Dynamo.

Diorita. Diorite.

Dique. A mineral dike. Dam.

Direceion. Strike.

Bisfrute. Exploitation. Obras de disfrate. Stopes. etc.

Bislocacion. Fault in vein.

Bobla (Peru). Night-shift.

Doblar. To bend. To work two shifts in succession.

Bocil. Docile ; malleable ; free mill- ing.

Dolerita. Dolerite.

Bolomia. Dolomite.

Doma. Dome.

Dragonera (Peru). Passage of the flame into the furnace at the fire- bridge.

Buela. Stave of a barrel or cask, etc. Stone of a floor, etc. Flooring board.

Bueno. Owner ; shipper of ore.

Dnreza. Hardness.

Dnrmiente. Railroad-sleeper ; sill of a set of timbers.

Echadero. Level place near a mine, where ore is cleaned, piled, weighed and loaded. Also called patio of the mine.

Echado. Dip.

Ecbar planilla. G-obbing ; packing ; filling with waste material,

Efervescencia. Effervescence.

Eflorescencia (Peru). Outcrop.

Eje. Axle ; axis.

Ejido. G-razing-place. Common.

Electricidad. Electricity.

Elevante. Overhand stope.

Elipse. Ellipse.

Embarcarse la veta (Peru). To be lost (as a vein) by reason of a fault or intersecting dike.

Embije. Thinly laminated mineral structure.

Embolo. Piston.

Emborrasearse. To become barren by pinching out, etc.

Embozado. Ftich mineral entirely im- bedded and concealed in barren rock.

Embudo. Funnel ; hopper.

Empalmar. To splice, to join.

Empalme. Splice in a rope. Timber joint ; junction of roads.

Emparejar. To square up,

i Enagenada, A change of ownership.

Encampanado. A shaft which does not reach the lower level of the mine.

Encapillar. To start work in a new gallery.

Encargado. Superintendent.

Encina. Oak. blanea. White

oak. negra. Black oak.

Encoger. To shrink.

Enfriar. To add to the torta sub- stances which reduce cupric to- cuprous salts.

Engancbar. To couple.

Engancbe, Aparato de. Grip.

Engranaje. Gearing.

Engranar. To throw into gear.

Engrane. Gear.

Engrasadura. Grease-cup.

Ensalmoro. Addition of salt to the torta. #

EnsaRcharse. When a vein widens.

Ensayador. Assayer.

Ensayar. To assay.

Ensaye. Assay. Assay-office,

Ensayo real (Peru). Assay made by bringing low-grade bullion to the assay of coin silver or gold. Pre- assay.

Entibador. (See Adeinador,)

Entibar. (See Ademar . )

Entresuelo. Gallery between two- levels.

Envainado. Lost or left to one side (as a vein).

Escalera. Ladder ; in Mexican mines generally made of notched sticks.

de barrotes. Mine-ladder

with rounds. de muescas.

Mine-ladder of notched timber.

588 GL0S3AEY OF SPANISH-AMERICAK MIlTINfi TERMS.

Escantillon. Wooden ruler used by Estampillas, Stamps with whieb the timbermen. Pattern. Gauge. Government taxes are paid. Post-

Escarche (Peru). Native silver in

tliin plates.

ISscomblOS. Waste-rock.

Escoiia. Slag or cinders.

Escorial Skg-pile.

Escorificador. Scorifier, in assaying.

Escnadra. Change of direction of 90° Square.

Esciirrir. To leak, to drip, to drain off.

Eslabon. Link.

Esmeralda. Emerald.

Esmeril. Emery,

Espato calizo. Calcspar.

Espula. Spatula.

Espejado (Peet). Galena.

Espejuelo. Mineral ivith spiealar cliaraeter. Zincblende (Pehu). Lead carbonate mixed with galena and gray copper.

Espeque. Handspike. Wooden lever. The long arm or lever in machin- ery moved by animal power.

Espesor. Thickness.

Espeton. Tiie tapping-bar of a smelting furnace.

Espoleta. The blasting-charge for a small blast. Primer or blasting-

Esponja. Spongy bullion, after re- torting and before melting.

Espuela, Additional quantity of cop- per sulphate required in the torta, when not enough was added at first.

age stamps.

Estanque. Tank ; reservoir.

Estano. Tin ; cassiterite.

Este. (See Oriente ) East.

Esteatita. Steatite.

Esteos. Vertical beams supporting the pulle 3 " of a hoist.

Estibnita. Stibnite.

Estopa. Cotton waste.

Estoraqiie. Kesin. Yellow zinc- blende.

Estratificacion. Stratification.

Estratos. Strata.

Estrellarse la veta (Peru). To '‘pe- ter out,” or become lean, espe- cially by scattering.

Estriada. Striated.

Estribo. Stirrup ; hog-back in a mountain,

Estroncio. Strontium.

Estrujon. Second collection of amal- gam, generally very pasty.

Eter. Ether.

Exagoual. Hexagonal.

Excavar. To excavate.

Excentrico. Eccentric.

Exhibicion. Exhibition ; assess- ment.

Exploracion. Exploration. Pros- pect.

Explosive. Explosive,

Ixplotar. To exploit.

Expropiar. To expropriate.

Extraer. To extract.

Extraviado. Astray in a mine.

Espuma. Scum.

Esquisto Schist. Faenas. Tasks. mueitas. Dead-

Estacada. Palisade. Lagging. work.

Estaca. Lagging of round poles. Faiseador. Placer-miner; gold- Stake. washer.

Estacion, Ventanilla.) Faja. Longitudinal banded or rlbbon-

Estadia. Leveling-rod. struoture.

Estado (Peru). A measure of length Ealda. Slope; flank of hill

(2f varas). Approximately a Falla. Vein of soft rock at right- fathom. angles to drift. Fault.

Estalactitas. Stalactites. Falso. Treacherous (ground). (See

Estalagmitas. Stalagmites. Fhjo.)

Glossary Or Spaxish-American Mixing Terms.

Famulia (Peru). Wedge; gad. , Fonolito, Phonolite.

Faneg'a. Variable unit of dry meas- Formacion. Forniatiou.

ure, usually 00.815 liters; of Formal. Regular; undisturbed, superficial measure usually 3.5663 Formalizar. To formalize a contract

hectares.

Fango, Coleetor de. Mud-drum. Farailoa (Peru). Outcrop project- ing above country-rock. Feldespato. Feldspar.

or other legal paper.

Forros. Lagging.

Fosforeseeiicia. Phosphorescence. Fosforo. Phosphorus.

Fosil. Fossil.

Felsita. Felsite.

Ferricianuro. Ferricyanide. Ferrocarril. Railroad. Ferroeiamiro. Ferrocyanide. Ferroso. Ferruginous.

Fibra. Filament.

Fibrosa. Fibrous.

Fierro. Metallic iron. Matte. Speiss. (See Rierro.) bianco. Ar-

; Fosilifera. Fossiiiferous.

I Fractura. Fracture.

! Fragua. Forge ; blacksmith’s shop, j Freno. Bridle ; brake. (See Gar- I rote . )

, Frente. Breast of working or face of

: drift. de giiia. Main* or

guiding level in a mine.

Fresno. Ash tree.

senical pyrite. j Frijolillo (Guanajuato). Round

Silver-ores consisting mainly of j fragments of limestone with eal-

iron oxide. espejado. Spec - 1 careous cement.

ular iron-ore.

Fierros. Low-grade silver-ores (from 20 to 35 oz. per ton). ‘‘ Abzug ” and “ Abstrich ” from lefining lead.

Filon. Small stringer; intersecting vein.

Filtrar. To filter. To sink in.

Finos. Fine ore ; “fines.”

Fisnra. Fissure.

Flaqneza (Peru). Leanness. Shaly structure. The overhanging sec- tion of a precipice.

Flecba. Machinery-shafting.

Flete. Freight-charges. Freight.

Flojedad. (See Aflojadero.)

Flojo. Weak ; loose, Terreno .

Loose ground.

Flnoresceneia. Fluorescence.

Foco. Electric arc or incandescent lamp.

Fogana de homo (Peru). Fire-pit of a furnace.

Fogata. Fumes from blasting.

Fogon. Hearth. Firebox.

Fogonero. Boiler-fiieman.

Fondeo. Temporary staging in a shaft.

Fondo. Bottom.

Fondon. A large cazo with copper shoes and bottom.

Frio. Cold. In amalgamation, the condition of ‘ ‘ sickened ” mercury.

Fronton. Face of a drift, etc. Any working-face.

Frntos. Ores.

Fnelle. Bellows. (See Barquin.)

Fnlminantes. Blasting-caps.

Fundicion. Smelting-plant.

Fnndidor. Smelter.

Fnndir. To smelt.

Fnndo miner o. All the perienencias embraced under one title.

Fnqne. Deepest point of excavation.

Fnrgon. Box or closed freight car.

Gabarro. Ore in large pieces, from egg-size up.

Galapago. Turtle-shaped pig of lead. English saddle.

Galemador. A silver-furnace (Peru). A small furnace for roasting sil- ver-ores.

Galemar. To reduce ore in a Mexican furnace.

Galeme. Reverberatory furnace. (See Cendradllla . )

Qalera. Shed ; long or narrow room ; storehouse.

Glossary Or Spanish-American Mining Terms.

Galeria. A galler.

Galio. Gallium.

Gallos. Bicli specimens, particularly those that show native gold or silver.

GambRcino. Prospector.

Gaiiclio. Hook of any kind. Bog used for extracting tapping-bars from furnace.

Ganga (Peru). Gangue.

Garabato. Curved iron bar used in copper-smelting.

Garrapata. Clamp for stretching wires.

Garrote. Brake. [See Freno.)

Garrotero. Railway brakeman.

Gaseoso. Gaseous.

Gasto. Expense ; cost.

Gato. Jackscrew. Railbender.

Gaz. Gas.

Geoda. Geode.

Geografia. Geography.

Geologia. Geology.

Gerente. Business manager.

Gis. Chalk crayon pencil.

Globosa. Globular.

Golpeador. Striker, in hand-drilling.

Goma. India-rubber.

Gorra. Miner's hat of felt, stiffened with pitch.

Gorron (Peru). Lower pivot of the vertical shaft in an ore-grinding mill.

Gotear. To drip gently ; to leak.

Grade. Degree.

Graduador. Manometer, or blast- gauge.

Grafito. Graphite.

Granate. Garnet.

Granite. Granite.

Granular. Granular.

Granza. Metallic minerals, from the size of rice to that of hens’ eggs.

Grasa. Slags from smelting opera- tions. Grease.

Grasero. Slag-pile.

Grena. Undressed ore.

Greta. Litharge,

Grieta. Crevice; fissure.

Grifo. Y alve-cock.

Grneso. Lump-ore.

Gnairona (Peru). Guard-rails at mouth of a shaft.

Guaje. Gourd for water.

Gualdra. Long and stout beam, generally sustaining other beams, or a heavy weight.

Gnarache (Peru). Work in over- time, generally at night ; sandal.

Guardafierros. Tool-man.

Guarda ray a. Landmark ; monu- ment. The end- and side-lines of a mining claim.

Guarda. Immediately adjacent coun- try rock. Guard.

Guardatiro. Person issuing mining supplies to the miners.

Guia. Indications (of a vein or pay- streak, or of metal in a panning- test). Guide for cage in shaft.

Guija. Gangue. Sometimes applied to quartz ; a pebble.

Guijarro. Pebble.

Guijo. Pointed pivot, upon which turns the upright centerpiece of an arrastre, a door, etc.

Guijoso. Quartz}

Guingaro- Pickaxe. (See Hidvgaro. )

Habilitar (Peru). To furnish work- ing-funds for a mine or mill.

Haclia. Axe.

Hachazuela. Adze.

Hachita. Hatchet.

Hacienda. Works; estate.

de beneficio. Metallurgical

works. de Eundicion.

Smelting works. de ma-

quila. Custom mill.

Hallazgo. Discovery.

Harina (Peru). Pulp.

Harnerero. Operator of a hand-

Harnero. Hand-jig.

Hatajo. Drove of pack-mules.

Hebilla. Buckle.

Hematita. Hematite.

Hembra. Post (timbering).

Herramienta. Tools. Equipment.

Glossary Of Spanish-American Mining Teems.

In Guanajuato used instead of Parada (which see).

Herrero. Blacksmith.

Hervir. To boil.

Hichu (Peru). A species of long grass used as fuel or fodder.

Hidrato. Hydrate.

Hidraulica Hydraulics .

Hidrocianogeiio. Hydrocyanogen.

Hidrogeno. Hydrogen.

Hidrografia. Hydrography.

Hierro. Iron. arcillosa, or

globoso. Limonite, arseni- cal. Arsenical pyrites. cro-

mado. Chromite. dulee.

Weld-iron. especular.

Spiegeleisen. fnndido. Pig-

iron. magnetico. Mag-

netite.

Hijuela. Seam of ore ; a small drain.

Hijuelas. A small-sized torta, made up as a sort of assay on a large scale, with from one to five kilo- grammes of argentiferous mud.

Hilo. Thread ; pay streak ; small stringer of ore. (Peru). Strike of a vein.

Hogar. Hearth of a furnace.

Hoja. Leaf ; sheet,

Hoja de lata. Tinned sheet-iron.

Hojalatero. Tinsmith.

HoUin. Pume; condensed furnace- smoke ; soot.

Honda. Eope-chair for descending shaft. Sling.

Hormignillar (Peru). To add salt and some water to the amalgamat- ing charge.

Hornillo. Reverberatory furnace.

Homo. Furnace. Alto homo. Blast furnace.

Horqnilla. Coke-fork.

Hoyo. Hole (in the ground).

Hnacal. Crate. Bowl. Drinking- dipper made of a gourd.

Hnachaca (Peru). The portion of ore belonging to the laborer who operates on shares.

Hnaillaripa (Peru). Thief of gold- ore.

Vot,. Ytttt. — .5

Huaillaripear (Peru). To steal gold- ore. To extract gold from tailings by means of sheepskins in a gentle current of water.

Huaira (Peru). Ancient Indian smelting furnace (still used in Potosi, Bolivia).

Huairacanon (Peru). Brattice, gen- erally of wood.

Huairuna (Peru). Small earthen retort, used for retorting amal- gam, extracting from 5 lbs. to 15 lbs. silver.

Hueco. Empty space. (See Demasia and Pertenenda.)

Hueja. Bowl made from a gourd. (See Jicam.)

HueRa. A trace of gold or silver in assaying.

Huingaro. Pick. (See Guingavo.)

Hule. India-rubber.

HuUa. Pit coal.

Humedad. Moisture.

Humildes metales (Peru). Silver- ores which amalgamate readily without sickening or flouring the mercury.

Humo. Fume; smoke.

Humpe (Peru). Carbonic acid in mines; choke-damp.

Hxmdido. (See Pemimhe.)

Igneo. Igneous.

Iman. Magnet, Piedra iman, lode- stone.

Impermeable. Impermeable. Water- proof.

Impuesto minero. The tax paid on mining claims.

Inclinado, Inclined.

Incorporadero. Place where the ki- corporo is effected.

Incorporo. The adding and mixing of mercury and other ingredients for the patio process,

Indicador. Indicator. Gauge.

Indio. Indian.

Informe. Beport.

Ingeniero. Engineer.

Ingenio. Engine (Peru). Crude ore-

592 Glossary Of Spanish-American Mining Terms.

mill, used in patio amalgama- ! tion (Peru). Crude amalgamat- 1 ing mill, having water wheel he- low the grindstones.

Intendeiicia. h-n official district.

Interventor. A trustee or receiver for a mine in dispute. Inspector.

Invasion. A mining trespass.

lodo. Iodine.

Iridio. Iridium.

JabonciHo. Decomposed talcose rock, or hardened clay, generally found in a vein, and sometimes indicating the proximity of rich ore.

Jacal. Miner’s cabin ; storehouse for mine supplies ; shaft house.

Jales, Jalsontles. Rich tailings or middlings from concentration or amalgamation.

Jalon. Tall survey-stake. Ranging pole.

Jarcia. Fabric or cordage of Ixtle fiber.

Jaspe. Jasper.

Janla. Cage.

Jicara. A vanning-bowl ; bowl made from tree-gourd. (See Hua.)

Jito. Grate in casting.

Jornada, or Jornal. Day’s work.

Juego. A set of anything, as, a set of repair parts for a machine.

Jnquero (Peru). Thief who takes ore from the vein.

Jnrasico. Jurassic.

Labor. Mine-workings in general. Specifically, a stope, or any other place where ore is being taken out.

Laboreo. Working on the vein.

Lacolita. Laccolite.

Ladero. Declivity; sidetrack.

LadriHo. Brick. de faego.

Firebrick.

Ladron. Robber.

Lama. Literally, slime. The ar- 1 gentiferous mud which is treated I by any amalgamation process ; ;

sometimes applied to tailings. Mud in vein.

Lamero. Place of deposit for lainas. (See Cajete.)

Lamina de fierro. Sheet-iron.

Lampazo. A sort of broom formed of green branches on the end of a long stick, to dampen the flame in a reverberatory furnace.

Laneera. An inclined stull.

Laqnes (Peru). Deposits of water in a vein. Druses.

Largnero. Cap or side-piece in shaft- timber.

Latitud. Latitude.

Laton. Brass. bianco, (mer-

man silver.

Lavadero. Literally, a washing place. A tank with stirring arrangement, to loosen up the argentiferous mud from the patio, and dilute the same with water, so that the silver amalgam may have a chance to precipitate. An agitator (Peru). Placer deposit.

Lavador. A rod, used in drilling, to keep a wet hole clean. The rod is made by striking tbe end of a long fibrous stick against a harder substance until it is flat and soft.

Lazado. A running noose.

Lazadores. Men formerly employed in recruiting Indians for work in the mines, by the process of lasso- ing them !

Lazo. A light cord of fiber.

Lecbo. A bed.

Lecboso. Milky. A variety of opal.

Legua. League ; equal to 2.604 Eng- lish miles or 4. 19 kilometers. One square league is called sitio de ganado may or and is equal to 4338,1123 acres.

Lente. Lens.

Lena. Fuel-wood.

Lenador, or Lenero. Cutter, carrier or supplier of fuel- wood.

Levantamiento. Elevation.

Levantar pianos, To survey.

GLOSSARY OF SPANISH-AMBRICAN MINIIsG TERMS. 593

Xevante. Breast; of a stope ; al le- vante, overhand stoping.

Ley. Literally, law. In mining, the j proportion of precious and other metals in any mineral compound. Grrade of ore.

Xieuaeion. Liquation.

Xiga. Alloy. Lead flux for smelting dry ores. Galena, rich in silver.

Xignito. Lignite

Lima. File.

Limadura. Literally, filings. The mercurial globules seen when a piece of argentiferous mud from a patio is assayed by washing in a spoon or saucer.

Ximpiador. Ore-sorter.

Limpio. Clean.

Lindero. Boundary.

Xingote. Ingot.

Linternilla. Driver of a horse- whim.

Xipta (Peru). Ash-colored or gray silver-ores, accompanying tin- lodes.

Xiquido, Liquid.

Lis. The flouring of mercury.

Xitio. Lithium.

Litologia. Lithology.

Xitro. Liter.

Lixiviar. To lixiviate.

Xodo. Mud.

Xogaritmo. Logarithm.

Loma. A low hill.

Xomerio. A series of lomaa.

Xona. Canvass.

Xongitud. Longitude.

Xosa. Flagstone.

Loser 0. A quarry for losa stone.

Loza. Pottery.

Xubricante. Lubricant.

Xumbrera. Yentilating shaft; port- hole in furnace.

Luz de arco . Arc-light. (See Foco. )

Llama. Flame.

Llamar. To signal for the cage or bucket.

ilampo (Peru). Ore found in con- dition of powder, generally very rich.

Llancar (Peru). To extract ores from very narrow veins, by means of rods, 7 to 10 ft. long.

Llano. A plain.

Llanta, Wbeel-tire.

Llannra. Extensive plain.

Liapar (Peru). To add quicksilver to the pulp when the amount al- ready added is in the condition of amalgam.

Llave. Any piece of mine timber.

Strut or key. Wrench, In-

glesa, or de tuerca. Mon-

key wrench.

Llicteria (Peru). A Bolivian ore containing lead, tin, zinc and sil- ver.

Llimpi (Peru). Ores of red color, generally cinnabar.

Machacado (Peru). Native silver in ore.

Machacar. To crush.

Machete. A large knife heavy enough for chopping.

Machihembrar. To dovetail, or join with tenon or tongue and groove.

Machete. A stake, or permanent bench mark, fixed in an under- ground working, from which the length and progress thereof is measured.

Machucador. Crusher.

Macizo. Unworked lode. Solid; abutment,

Madera. Lumber.

Maestro (Peru). The principal trough in patio amalgamation, in which

all the amalgam is gathered.

Mecanico. Master-mechanic.

Magistral. Eoasted copper pyrites, used when sulphate of copper is not obtainable for amalganiating purposes.

Magnetico. Magnetic.

Magnetismo. Magnetism.

Magnetita. Magnetite.

Malacate. Windlass. Horse-whim.

Any mining hoist. de arana.

Capstan.

aLOSSAHy OF SPANISH-AMEHICAN MINING TERMS.

Malaquita. Malachite.

Malla. Mesh of a screen.

Mamposteria. Mason-work.

Manantial. A spring of water.

Mandon, Overseer or boss.

Manero. Single-hand miners ’hammer

Manga. Conical canvas hag to drain quicksilver out of amalgam. Hose. Tuyere-sack.

Manganeso. Manganese.

Mango. Handle for pick or hammer.

Mangnera. Hose.

Mangnito. Sleeve.

Mano. The grinding-stone of an ar- rastre, etc. defierro. Buck-

ing-board muller.

Manta. Blanket-vein.

Mantas. Sacks of jute or heniquen, etc. , for carrying ore, etc.

Mantear. To hoist.

Manteo. Hoisting. An inclined hoist.

Mantero. Man who loads material to be hoisted in a shaft.

Manto. Pocket.

Manila. Smelting- or treatment-

charge. yflete, Freight and

treatment-charge.

Maqnilar. To work ore for its owner on shares, or for money.

Maqnilero (Peru). Ore-buyer.

Maqnina. Machine. explora-

dora. Diamond-drill machine.

Marcasita. Marcasite.

Marco. Set of shaft-timbers ; square set. Timber frame of any kind. A weight of 8 oz, avoir.

Marga. Marl.

Marmajas. Concentrated sulphides.

Marmol. Marble.

Marqneta. Bar of lead bullion (Pe- ru). Ketort-silver.

Marro. Sledge-hammer.

Martillo. Single-hand hammer.

Masa (Peru). Pulp. derecha

(Peru). Yertical ore-deposit.

echada, horizontal ore-deposit.

Mata. Matte.

Matriz. Matrix.

Mazo. Striking-hammer. Stamp for crushing ore.

Mecapal. Sheet- iron scraper used by ore-sorters. Flat strap or rope that goes over the head of a porter to- support the load.

Mecate. Coarse twine. Twine made of Maguey fibre or Ixtle. (See Lazo.)

Mecha. Fuse. Wick for a lamp or a candle. Torch.

Media barreta (Peru). Inclined shaft.

Medir. To measure. To survey.

Memoria. Pay-roll.

Mena. Mineral vein. Menas. Ores*

Merced. Gift, grant, or conces- sion.

Mercuric. Mercury. corneo.

Calomel.

Meridiana. Meridian.

Merma. Ore lost by abrasion during treatment or transportation.

Mesa. Concentration table. Hearth of furnace. Plateau.

Metal, Any metalliferous mineral.

aznl. Lead ore. crude

(Peru). Oxidized ore. de

ayuda. Fluxing- ore of any kind. de cebo. Yery rich ore, usu- ally treated in small reverbera- tory furnaces. de correr.

Yery pure tin ore. de fuego.

Smelting-ores. de pie. Ore

amenable to the patio process. de quema (Peru). Sul- phide ore. enpiedra(PERu).

Crude ore. jugeso. Wet ore,

t.e., lead -ore. negro, (See

Blenda.) ordinario. Com- mon ore. pepena. The best

class of selected ore.

Metalada. Discovery of ore in bar- ren working.

Metalurgia. Metallurgy.

Metamorfico, Metamorphic.

Metamorfosis. Metamorphism.

Metapil. The grinding-stone of an arrastre, etc. (See Mano.)

Metate. Iron bucking-board for grinding ore-samples.

Mezcla. Furnace-charge. Mortar.

GLOSSARY OF SPANISn-AMERICAN MIMKG TERMS.

MiUon. An ore-pile. fMiiesca. Notch in a stick; mor-

Mma. Mine. j tise ; notch cut in a round or

Mineral. Mining district. square beam for the purpose of

Mineria. Mining, embracing the j using it as a ladder.

whole subject. Miiestra. Sample.

Minero. A mine owner ; a mining j Mufla. Muffle. A rude cupel fur- nace for treating rich ore on a bath of lead. {See Vaso . )

Mula. Mule.

Mineta (Peru). Small mine eham- i Malta. Penalty or fine.

her or cavity. ! Muro (Peru). Foot- wall.

Mixta. Alloy of gold and silver.

Mogrollo. Metal de ceho.) Nata. (Same as A?cona or Grasa,) Mojon, or Mojonera. Stone pillar to Native. Native.

mark corner of a claim. Any Negocio, Business; enterprise, boundary-mark. Negrillos. Negros. Black silver-

Molde. Mould. ore ; black sulphide of silver.

Moledora (Peru). Upper millstone. Niobio. Niobium.

Moler. To grind. en seco Niquel. Nickel. rojo. Niccolite.

(Peru.) Dry grinding. Nitrico. Nitric.

por sutil (Peru). Wet grinding. Nitrogeno. Nitrogen.

Molibdeno. Molybdenum. Nivel. Level. del mar. Sea-

Molienda. Charge of ore to be level.

ground and amalgamated. Nodulos. Nodules.

Moliiio. Ore-grinding mill. Noque. (See Cocha.)

debalas. Ball mill. cMleno. Noria. Endless chain of buckets.

Chili mill. de muestras. Norte. North.

Sample-grinder. Nudo. Knot or button on traction-

Moloiique. Bich specimen, of which tramway. Coupling,

one-half, or more, is silver.

Mono. Vertical Stull. Oblicno. Inclined.

Montana. Country-rock. Obradora (bnena 6 mala). Bock

Monton. Pile (of ore or other ma- that breaks well or badly.

terial). Old unit of weight for Obras de disfrute. Workings from ores, equivalent insome districts which ore is being extracted, ro 3000, and in others to 3200, Obras mnertas. Literally, “dead Mex. lbs., of 0.4602 kg. work.” Work done in the coun-

Mordaza. A mortise. try-rock.

Morillos. Bound poles for light tim- Ocote. Pitch-pine.

bering. Ocre. Ocher.

Morro. Furnace wall-accretions. Octaedro. Octahedron.

Mortero. Mortar. . Oeste. West. (See Fonienie.)

Mosqneado, Bock mineralized in Oficina. Office.

specks. Ojo de Vibora. Yellow blend.

Mostrador. Sampler. Ojos. Small, rich bunches of ore.

Motor. A motor. Ojosa. Honeycombed structure.

Mozo. Boy. Man of all work. Oligista. Specular hematite.

Boustabont. 011a. Clay water-jar. Slag-pot.

Muelle. Elastic spring. (See Be - 1 Ollero. Slag-pot puller. sorte.) ! Opalo. Opal.

captain; an underground boss.

de cuarto. Shift boss.

mayor. Head mining-captain.

596 GLOSSARY OP SPANISH-AMERIC.*i]JT MINING TERMS.

Operario. A working miner

Ordinarios. Low-grade ores.

Oriente. East.

Oro. aold.

Oroclie. Low grade or yellowisk sil- ver. Bullion containing gold and silver. Lore.

Orrillaje. Sheet-lagging.

Ortoclasa. Orthoclase.

Osmio. Osmium.

Oxalico. Oxalic.

Oxido. Oxide.

Oxigeuo. Oxygen.

Oyamel. Jack pine ; spruce pine.

Pabilo. Wick.

Pacos. Ferruginous silver-ores (Pe- ru). Oxidized ores.

Paja quemada (Peru). Jamesonite.

Pala. Shovel. de chuso.

Bound-pointed shovel. cua-

drada. Square-pointed shovel.

Paladio. Palladium.

Palanca. Lever. Toggle of rock- crusher.

Palanque. Barring after shots have been fired.

Palero. Shoveler. Mine- carpenter, or timberman.

Palo, Stick. Piece of timber.

Palos labrados. Hewn timber.

redondos. Bound timber.

Panes. Amalgamating-pans.

Panino. Vein-formation. Vein-

material. muymacizo. The

very hardest kind of vein-matter

or rock. macizo. Bock not

quite so hard, but still not requir- ing to be timbered. favor-

able. Bock easily broken down by drilling, but not needing timbering. blando. (Gener-

ally slate or schist with veins or spars which can broken out easily by pick, bar, Or wedge, and which must, sooner or later, be timbered

up. muy blando. Usually

clay shale or argillaceous schist, and requiring constantly to be held up by timbering.

Paradas de busca. Miners working on tribute. alacarga. Min-

ers working for so much per ton or ‘‘ carga ” of ore broken down or

extracted. adestajo. Miners

on contract, at so much per meter, etc, a partido. Miners re-

ceiving as pay a share of the ore they mine. de hacienda,.

I or de obra. Miners working

by the day.

Paralelo. Parallel.

Parcionero. Partner in a mining contract.

I Pardo. Oxidized or surface ore. (See

i Colorado. )

I Pared. Vein- wall.

i Parihuela. Hand-barrow.

Parrilla. Grate-bar.

Partido. Division of ores between partners. Working a mine by partido is when the miners agree with the owners to take a certain part of the ores in place of wages. Usually the mine-owner provides candles, powder and steel, and keeps the drills sharpened, and receives, in payment of royalty and supplies, two-thirds or more of the ore taken out. This con- tract is renewed weekly or monthly, etc., and the pi’oportion of ore retained by the miners is greater or smaller according to the richness of the stopes where they work. It is generally bought from them by the mine-owner himself, for various reasons.

Pasilla. Dry silver amalgam.

Pasta. Amalgam of gold or silver. Gold and silver bullion.

Pastura. Fodder for animals,

Patilla. Platform left in shaft.

Patio. Cloth used by miners.

Patio. Any paved enclosure, more or less surrounded by buildings. An ore-sorting yard. A floor or yard where argentiferous mud is treated hy amalgamation.

Peehera. Leather or cloth, worn by

Glossary Of Spanish-American Mining Terms. 597

laborer packing ore, to protect neck and back.

Pedernal. Flint. i

Pegador. Foreman in charge ofj blasting. !

Pegar. To fire the loaded drill-holes.

Pella. Silver amalgam. Plata PeUa. The same.

Pendieiite. Gradient. Hanger. Grade.

Pena. Wall-rock.

Peon. Helper; laborer. suelto.

Houstabout.

Pepenado (Sp.). Dressed ore.

Pepenador. Ore-sorter.

Pepenar. To sort ore.

Pepita. Nugget.

Perdida. Lossinpao amalgamation Loss in general. (See Consu- mida.)

Perfil. Profile.

Perforadora. Machine-drill.

Perito. An expert in any science or art.

Perla. Assay-bead.

Pertenencia. Mining claim. Under the modern Mexican Mining Law, a square of land 100 meters on a side {ie., 1 hectare 2. 471 acres) is the minimum unit. This unit is called a pertenencia.

Pesador. Weighmaster.

Pesalicor. Water blast-gauge. Hy- drometer.

Peso. Weight. Silver dollar.

bruto. Gross weight. neto.

Net weight.

Petanque, or Petlanque. Euby sil- ver. Tetrahedrite, and other rich silver minerals.

Petroleo. Petroleum. I

Peya de Cobre. Copper amalgam.

Fez mineral. Mineral pitch. (See

Betun.)

Picacho. Peak.

Picador. One who taps a furnace.

Picar. To tap a furnace for slag or bullion.

Pico. Pick-axe; miners’ striking- hammer.

Pie. Brace. de amigo. But- tress or strut. degallo. Di-

agonal brace. derecliO'

Yertical brace. Post.

Piedra bruta. Country-rock ; barren rock.

Piedra cornea. Chert; flint.

Piedra de mano . Hand-specimen.

Pila. Stone tank.

Pilar. A pillar of rock or ore.

Pileta. Sump of a mine. Basin, pot or crucible of a smelting-furnace.

Pilon. Pestle of a mortar.

Pinta. Indication (by color, weight, structure, etc.) of the metallic

value of an ore. de metal.

Indications of ore ; spots of ore.

Pina. Cone for sample-grinder. In metallurgy, the same as Bella.

Pinon. Nut-pine. Pinion.

Piqneta. Tap-hole. de graza.

Slag-tap. Plomo. Lead-tap.

Piqnete. Surveyor’s stake on surface ; small prospect- work of any kind.

Piramidal. Pyramidal.

Pirargirita. Pyrargyrite.

Pirita. Pyrites. (See Bronce.)

magnetica. Pyrrhotite.

Pirolusita. Pyrolusite.

Pirometro. Pyrometer.

Piso. A level.

Pison. Eammer.

Pistola. Small drill-hole.

Pizarra. Slate rock.

Pizarrena. Slaty structure.

Placas. J aw-plates for crusher.

de union. Fish-plate.

Placeres. Secondary gravel deposits. Placers.

Plan. The lowest working in a mine. Trabajar de plan. To mine for depth ; to sink.

Planclia. Pig, ingot, bar, plate, thick sheet, or mass of any metal. Bucking-board. Mudsill. Steel sheet. Turn-plate. Amalgamat- ing plate. A charge of roasted ore — about 70 lbs.

Plancliera. Ingot-mould of sand, earth, or iron.

Plancbnelas. Fish-plates.

Planilla. Inclined floor upon which

598 Glossary Of Spanish-American Mining Terms.

tailings are washed; stationary huddle. Sorting-table. Wooden skimmer for molten metal.

Planillero. A workman on the

jylamUa always paid according to amount of concentrates produced.

Plano. Floor of a mine-working. i inclinado. Incline. !

Plata. Silver blanca. Native

silver. ceniza. Chloride of

silver ore. cornea amarilla.

lodyrite. cornea blanca.

Cerargyrite. esponja. Silver

sponge. maciza (Peru).

Native silver, generally in small

sheets. mixta. Gold and

silver alloy. negra. Argen-

tite. piha. Silver bullion

obtained by retorting amalgam,

and not yet melted. pasta.

Silver-bullion. Spongy silver bars

after retorting. verde. Bro-

myrite; Embolite.

Platero. Silversmith.

Platillo. Scale pan. (See Pavuna.)

Platino. Platinum.

Pliegue. Fold.

Plomada. Plumb-line, or plumb-bob.

Plomero. Lead- tapper. Furnace- man. Plumber.

Plomillos. Shots of lead found in slags.

Plomo. Lead. Lead-ore. ronco

(Peru). Silver sulphide.

de obra. Base lead-bullion (“work-lead ”).

Poblador. Shift-boss. The miner who points the holes.

Pohlar. Tosetmenat work in amine.

Polea. Pulley ; sheave.

Polvillos. Rich concentrates.

Polvo. Bust. Flue-dust.

Polvora. Powder. Gunpowder.

Polvorero. Powder-monkey.

Polvorillas (Peru). Decomposed sul- phide of silver.

Polvorin. Powder magazine.

Pomez. Pumice.

Poner en marcha (un homo). Blow in a furnace.

Poniente. West. (See Oeste.)

Pbrfido, or Porfiro. Porphyry.

Por pie. The 'patio process.

Porronguito (Peru). A crude quick- silver measure.

Poste. Post.

Potasio. Potassium.

Pozo. Winze or shaft. al cielo.

Vertical winze upward, de

arrastre. Inclined winze down- ward. y patnia. Passage,

with alternating vertical and in- clined portions, for the transpor- tation of ore and waste to the surface on the hacks of laborers.

Precipitador. Workman in a leacli- ing-mill who adds the precipitant to the silver solutions.

Prensa. Vise. Press.

Presa. Reservoir.

Propiedad minera. Mining claim.

Prorroga. An extension of time.

Prueha. A test. de crude. A

test made when the torta is sup- posed to be rendida or worked, to ascertain whether there is suf- ficient mercury present.

Pudinga. Pudding stone ; conglom- erate.

Puehle. The actual working of a mine. The total working-force employed in a mine. A shift.

Puente. Bridge. Suspended plat-

form in stope or shaft. Stull.

Puerta. Gate. de graza.

Slag-tap. de plomo. Lead-

tap.

Puertas. Massive barren rocks, or “horses,” occurring in a vein, which must be removed to regain the pay streak.

Puerto. Port ; a mountain pass.

Pulgada. Inch.

Punta Small cord for tying ore-sacks.

Puntal. Prop.

Puntista. The laborer who knocks down all loose rock in the face or stope, leaving it ready for the next shift.

Puno. Handful.

Glossary Of Spanish-Ambmcan Mining Terms. 599

Piirgar. To blow off a boiler, Puruffa (Perl). Small earthen van- ning plaque about T to 8 inches diameter for making amalgamat- ing tests or controlling the opera- tions of the 'patio.

Quebrador. Rock -crusher ; an ore- sorter.

ftuebrazoii de veta. Break in vein, ftuema. A roast of ore ; the process of roasting ore ; retorting amalgam, ftuemadero. A burning-place; a retor ting-furnace for silver or gold amalgam.

ftuemado. Literally, burnt stuff. Any dark, cindery-looking mineral encountered in a vein or mineral deposit (generally manganiferous). ftiiemazoiLes. Silver-ores containing black peroxide of manganese (Pe- ru), Outcrop, ftniebra. Break or fault, ftuijadas. Rock-breaker ; jaw-plates, ftuilate. Carat.

ttuimbalete (Peru). (See Bimhalete). ftuimico. Chemist or assayer. ftuintal. An ancient weight equal to 4 arrohas or 46.0246 kilograms, ftuitapepena. A watchman who searches the miners as they come out of the mine.

ftuinto. Mining tribute from Amer- ican colonies to the King of Spain.

Rajas. Lagging (half-round). Ramal. Branch -vein.

Ramalear. To branch off into vari- ous divisions.

Raspar. To clean up an arrastre. Rastrillo. Rake. Stirrer for moving ore in a furnace. A rabble. Rastron, A Chilian mill.

Rata. Candle-boy.

Raya. Day’s pay.

Rayador. Time-keeper.

Rayar. To pay off.

Rayarse. To register after work in the mine.

Real. A mining camp ; royal ; a

Spanish coin. hacienda.

Royal treasury. deminas.

A town having silver-mines in its vicinity.

Reata. Light rope.

Rebaje. The blasting down of a hill- side. In general, any excavation other than the driving of a face or sinking of a shaft. Underhand stoping. Surface excavation.

Rebosadero. Uossan.

Rebosador (Peru). River gold- placers.

Recibir con madera. (See Com- poner. )

Recoger. To collect.

Reconcentrados. Concentrates.

Recuesto. Dip.

Red. Network.

Redito. Interest.

Refaccion, pieza de. Repair-piece.

Refaccionero. The helper of a rock- drill operative.

Refogar. To retort amalgam.

Refraccion. Refraction.

Regular. Fair or average.

Reja. (Jrating.

Relampago (Relampaguear). The

brightening of the silver button during cupellation.

Relaves. Residue left in a hatea from a washing-test.

Reliz. Wall of vein. del alto.

Hanging-wall. del bajo.

Foot-wall.

Relleno. Back-filling.

Remache. Rivet.

Remisiou. Shipment.

Rendimiento de metal. Ore-output.

Rendir. To yield. The total amal- gamation of the silver in a patio charge.

Repasador. Man who turns over pulp in the patio.

Repaso (Repasar). The act of mix- ing the patio charge by treading it with horses or mules.

Reposadero, The bottom of a cruci- ble or pot in an upright smelting- furnace.

600 Glossary Op Spanish-American Mining Terms.

Eeposadores. Settling-tanks.

Rescatador. Ore-buyer.

Reseate. Purchase of ores. Pur- chased ores.

Resecos. '‘Dry” ores.

Resorte. Spring. Spring-buffer (of rolls).

Respaldo. Wall of a vein. alto.

Hanging-wall. bajo. Poot-

wall.

Retaque. Pilling.

Retenida. Pillar in a stope.

Retorta. Retort.

Reverberar. To roast.

Revoltnra. Mixture ; furnace-charge.

Rezaga. Waste rock.

Rezagado. Piled up.

Rico. Rich.

Riel. Rail,

Rion. Kidney of ore. j

Rio. River.

Risco. Sharp, precipitous rock. Quartz found in veins or outcrops.

Roble. Oak. (See Enema.)

Roea. Rock.

Rodillo. Roller.

Roldana. Sheave.

RoUo de porta cable. Rearing-drum of cable-tramway.

Romana. Steelyard. de bas-

CTxla. Platform -scale. de

gancho. Steelyard. de

plancha. Charging-scale.

Romaneador. W eigher.

Rondana. Gasket ; washer.

Rosea. Screw-thread.

Rosicler. Ruby silver.

Rubi. Ruby.

Rueda. Wheel.

Rumbo. Direction ; strike of a vein.

Saca. A bag full of ore. A mine is said to be de hitena saca when it has large, accessible ore-reserves.

Sacabocado. Punch.

Sacabon, Sacavon, (See Socavdn . )

Sacar. To draw or bale out.

eon bomba. To pump.

Sal. Salt.

Salbanda. Sliekensides.

Salina. Salt deposit ; salt-pit.

Salitre. Saltpeter.

Salmuera. Brine.

Salon. Chamber.

Saltierra. Earthy, impure salt.

Sangrar. To tap (a furnaec).

Sangria. Cross-cut from shaft to vein.

Sapo (Rana). Railway-frog.

Sardina. A cross-cut saw.

Sarten. Pan for drying moisture samples. Prying-pan.

Secador. Sample-drier.

Seccion. Section.

Sedimentario. Sedimentary.

Selenio. Selenium.

Seno. Sine.

Sermcho Hand-saw.

Siderita. Siderite.

Sienita. Syenite,

Sierra. A mountain range ; a saw.

Sifon. Downtake of blast-furnace. Syphon.

Silice. Silica.

Soharha. Tappet.

Sobrestante. Poreman.

Socavon. Mining-tunnel. Adit.

a hilo de veta. Drift.

crucero. Cross-cut.

Sodio. Sodium.

Soga. Rope or thick cord ; cable for hoisting.

Solayo. Cutting-in hole.

Solera. Rest for grate-bars, etc (Peru). Lower millstone.

Solicitud. The application for a min- ing claim. Petition.

Solido. Solid.

Sondear. To sink a prospect bore- hole.

Sondeo. Prospect bore-hole.

Soplador. Blower.

Soplar. To furnish blast for a fur- nace.

Soplete. Blowpipe. Tuyere. En- saye al soplete, Blowpipe assa}

Soplo. Blast.

Soquete. Clay for stopping furnace- tap. Clay in vein.

Soquetero. One who wets and kneads* clay to he used at thelfurnacc.

Glossary Of Spatish-American Mining Terms.

Soroclie plomoso. Lead carbonate.

leliiciente. Argentiferous

galena.

Soyote. Vug.

Sueldo. Salary ; wages.

Suelo. Bottom ; surface of ground.

Sulfato. Copper sulphate.

Sulfuros. Sulphide-ores ; rich sul- phides of silver from lixiviation processes.

Superficie. Surface.

Sur. South.

TaMque. A partition-wall in a mine.

Tabla. Board or plank. The broader face of beam or timber ; one of the sides or front of an excavation.

de alto. Hanging-wall.

de bajo. Foot-wall.

Tabladillo (Peru). Crude amalga- mating mill having water-wheel (thorn grindstones.

Tablero. Tally-board.

Tablon. Wooden plank.

Tahona. Anxistre moved by water- power.

Tabonero. The man in charge of the

Tapar. To stop a furnace-tap with.

i clay.

'Tapextle. A working platform or stage built up in a stope, or any- where in a mine. A landing-place between two flights of ladders.

Tapon, A plug.

Taponera. Doliy-bar.

Taquia (Peru). Llama-dung, used, for fuel in roasting and smelting.

Tara. Tare weight.

Tarango. Platform in stope or shaft.

Tarea. Task ; job. It is common in Mexico to engage common laborers by the tarea.

Tartarico. Tartaric.

I Taza. Crucible of blast-furnace.

Techo. Hoof ; hanging-wall.

Tejo. G-old or silver ingot.

Tela de alambre. Fine wire-cloth.

Telegrafo. Telegraph.

Teluro. Tellurium.

Temesquitale. The earthy part of pulverized ore.

Temesq_uitate. A rich scoria or lith- arge from the process of cupella- tion.

tahona.

Tajo abierto. Open-cut work.

Talache. Mattock.

Taladrar. To bore or drill.

Taladro. Brill. de punta de

diamante. Diamond drill.

Talco. Talc.

Talega, Coin bag.

Talio. Thallium.

Teja. Tile.

Tambor, Hoisting-drum.

Tamiz. Fine screen.

Tanate. Leather, hide, or jute bag to carry ore or waste rock.

Tanatero. A laborer, or bag-car- rier.

Tanda. The ore or waste (usually waste) that is knocked down or loosened in driving a face or sink- ing a shaft.

Tangente. Tangent.

Tanque. Tank,

Tapa. Cover.

Templar. To temper steel.

Tenazas. Tongs.

Tenedor de libros . Bookkeeper.

Tentadura. A sort of assay, made in a horn spoon, in an earthen sau- cer, or in a wide and shallow ves- sel of any kind, for the purpose of ascertaining the amount of amal- gam present in a sample of argen- tiferous mud from an amalgamat- ing patio. Any assay made by washing or “panning.”

Teodolito. Theodolite ; a surveying- transit.

Tepetate. Barren rock ; attle ; deads.

Teposteles. Polybasite.

Tepostetes (Sonora). Boulders of specular iron-ore found in gold- placers.

Tequezquite. Native carbonate and chloride of sodium.

Tequio. A task set as one day’s work.

Glossary Of Spanish-Americais’ Mining Terms,

Ore broken from a given place or belonging to a given contractor. In some places, ore not rich enough to sack underground,

Terceria, or Tercero en discordia. Umpire.

Terciario. Tertiary.

Teroio, A sack of ore, about 150 pounds weight. A load for a tana- tero. One-half load for a mule

Termometro. Thermometer.

Terraja. Screw-cutter.

Terrapin. Embankment.

‘Terreno. G-round; formation; ter-

rane, movedizo. (See Pan-

ino muy hlando. )

Terrero. Mine-dump.

Terrosa. Earthy.

Testeras. Uprights in a mine, whether pillars, arches or posts.

Textura. Texture.

Tierra. Pine -sized ore.

Tierras (Sp.). Earth impregnated

with mercury-ore. de labor.

Dirt from a stope, mixed with

particles of ore ; fines. de

yunque. Chips made in breaking and sorting ore.

Timbre. Bell. Stamp-tax.

Timbrero. Bell-man.

Tina. Mine-bucket. Tub. Leaching vat.

Tinaja. Basin of water in rock.

Tintero (Peru). Sump of shaft.

Tirantes. Small-sized hewn timber. Ties.

Tiro. Mine-shaft. Ashot. de

arrastre, or de recneste, In- clined shaft. general.

Shaft used for various purposes at the same time ; hence, a shaft of two or more compartments.

Titanic. Titanium.

TiMo. Title.

Tizon. Bond in masonry. (See JDiente.)

Tlaco. An old coin. See ( Claco).

Toba. Volcanic tufa. caliza.

Calcareous tufa.

Tobera. Tuyere. (See also Alanbis. )

Toldo. Awning.

Tolva. Hopper. Ore-chute.

Tonel. Chlorinating- or amalgamat- ing-barrel.

Tonelada. Ton.

Topacio. Topaz.

Tornillo. Bolt or screw.

Torno, A windlass ; a turning-lathe.

Torta. Pie or cake. The heaps of argentiferous mud which are treated in the patio.

Tosca. Clayey 'vein-matter. Talc seam. (Catorce.) Soft, decom- posed porphyry.

Tostar. To roast.

Tostador. A roasting-furnace.

Tramo. Block of ground, {.e. , linear space along tunnel or shaft, etc.

I Tranca. Square set of timbers.

Tranvia. Tramway.

Trapiche. A primitive form of grinding-mill.

Traquitico. Trachytic.

Traquito. Trachyte.

Travertino. Travertine.

Trecho. A portion of space, distance or time.

Trementina. Turpentine.

Trilla. (See Torta.)

Trincha. Piled waste. Coke-fork.

Trinchera. A roughly stacked pile of rock or ore.

Trinquete. Pawl.

Trituradora. Bock-breaker. (See Quehrador.)

Triturar. To crush.

Trompa. “Nose” of chilled slag over a tuyere,

Trompo. Foot of a stull or post.

Tronco. Team of horses or mules.

Tronera. Chimney; channel; flue.

Trueqxie. Truck or trolley (for tram- way-bucket). Truck of railway car.

Truncado. Truncated.

Tube. Tube, pipe.

Tuerca. Screw-nut.

Tumbar. To break down ore, etc.

Tumbe. The act of breaking and removing ore.

Glossary Of Spanish-American Mining Terms.

Turbina. Turbine.

Tnrno. A shift of work.

Turnesa. Turquoise.

Unifaz, Single phase.

Union. Coupling of wire-rope or of pipe.

Urano, or Uranio. Uranium.

Vaeia. Empty.

Vaciador. One who dumps slag-pots.

Vaguada. Water-way. Stream- channel. Water-shed or divide.

Valvnla. Valve.

VaUe. Valley.

Vanadio. Vanadium.

Vapor. Steam. Bad air in mines.

Vara A measure; in Mexico, equal to 33 inches or 0.838 meters.

V arej on. Pole-lagging.

Vaso. Eeverberatory for smelting rich ore, or for cupelling silver. Crucible of blast-furnace.

Vela. Candle.

Velador. Watchman.

V elocidad. V elocity.

Vena. Veiulet, not over 3 in. thick; a “knife-blade ” vein.

Venero. A spring of water in a mine.

Venta. Sale.

Ventanilla. Station.

Ventanillero. An underground sta- tion tender.

V entilacion. V entilation .

Ventilador. Fan; blower.

Vereda. Foot-path ; trail.

Veridico, Trustworthy ; veracious.

Vertice. Vertex.

Vertiente. W atershed.

Vestigio. A trace of gold or silver in assaying. (See Euella.)

Veta. Strictly, a fissure- vein ; loosely,

any mineral deposit. da-

vada. Vertical vein. cor- rida. Continuous vein.

crncera. Cross-vein. echa-

60 a

da. Inclined vein. eii

borra. Vein carrying no ore.

en fmtos. Vein carrying

pay-ore. ramal. Branch-

vein. recostada. Inclined

I vein. serpenteada. Vein

I of variable strike. soda.

Companion or connecting vein.

transversal. Cross-vein .

VetiUas. Slides. The grooves in a sliekensides.

Vidrio. Glass.

Viga. Joist. (See Tlrantes.)

Voladora (Peru). Upper millstone. One of the grinding-stones or mullers of an arrasfre.

Volante. Fly-wheel.

Volcan. Volcano.

Volta. An electrical volt.

Vnelta. In refining silver, the mo- ment when impurities have been removed.

Xacal. (SeeJacal)

Tacimiento. Ore-deposit.

Yelmo. Coke-fork.

Yeso. Gypsum.

Yunque. Anvil.

Zacate. Fodder for animals. Hay, cornstalks, etc.

Zafiro. Sapphire,

Zanja. Ditch.

Zapa-pico. Mattock. Pick.

Zapata. Brake-shoe.

Zaranda. Large ore-screen ; grizzly.

Zarandero. One who attends the screen.

Zirconio. Zirconium.

Zona. Zone.

Zorra. Drill-hoy or messenger.

Znrdo. Left-handed.

Znrron. A rawhide ore-sack holding about 150 lbs. ; a load for a Tana- tero. (See Tanate . )

Bibliography of Mexican Geology and Mining.

By Prof. Rafael Aguilar Y Santillan, City Op Mexico.

Seceetaby’s Note. — This valuable bibliography has been compiled :

1. By selecting from the larger list prepared by the distinguished author, and published in 1898 by the Department of FomentOj those items which concerned more or less directly economic geology and mining — the titles of many treatises on paleontology, vulcanism, meteorites, chemistry, etc., being omitted.

2. By adding to the catalogue thus formed the titles of later publications, kindly furnished by the author, and bringing the bibliography down to 1902.

The original numbers used by the author in the official publication of 1898 have been retained. Gaps in the series indicate titles omitted, as above ex- plained, in this republication. Numbers followed by lettei's designate the titles- of later date furnished by the author for interpolation.

The result, as here published, is arranged under three headings : I. Abbre- viations Used in the Bibliography ; II. Publications Arranged Alphabetically under Authors’ Names ; and III. Alphabetical Index of the Principal Localities Mentioned in the Bibliography.

I. Abbreviations Used in the Bibliography.

AhhaTid. der K. Akad. der Wissensehaftei. — Abhandlungen der Kaiserliche Akade- mie der Wissenschaten. Berlin.

Am. Geol. — The American Geologist. Minneapolis, Minn.

Am. J. Sc. — American Journal of Science. New Haven, Conn.

Am. Nat. — The American Naturalist. Philadelphia.

An. Acad. Mex. 0 . — Anuario de la Academia Mexicana de Ciencias Exactas, Fisi- cas y Naturales, correspond iente de la Real de Madrid. Mexico, 1896.

An. Col. Min. — Anuario del Colegio de Mineria. Mexico, 1845, 1848, 1859 y 1863. Annals New York Ac. Sc. — Annals of the New York Academy of Sciences.

Ann. des Min. — Annales des Mines. Paris.

Ann. des Sc. Nat. — Annales des Sciences Naturelles. Paris.

Ann. K. K. Naturhistorischen Hofmuseum. — Annalen der K. K. Naturhistorischen Hof museum. Wien.

Ann. Eq). U. S. Oeol. Survey. — Annual Report of the Director of the U. S. Geo- logical Survey. W ashington .

Ann. Scient. ed Ind. — Annuario Scientifico ed Industriale. Milano.

Ann. Soc. dj’ Emulation des Vosges. — Annales de la Socit d’ Emulation des Yosges. Ans. Asoc. Ing. y Arq. — Anales de la Asociacibn de Ingenieros y Arquitectos de Mexico.

Am. M. de C. — Anales Mexicanos de Ciencias, etc. Mexico, 1860.

Am M. F. — Anales del Ministerio de Fomento de la Renilbliea Mexicana. Mbx-

*606 Bibliogkaphy Of Mexicat Geology And Mining.

Arch. Comm. Sc. 3Ieuque. — A.rchires de la Commission Scientifique du iVrexiqiie. Paris, 1865-1869.

Archiv. f. Min. — Archivfiir Mineralogie.

Assoc. Ft. cwanc. No.— Association Franaise pour Payancement des Sciences.

Beitr. z. Geol u. Pal 3/ex\— Beitrage zur Geologic und Palaeontologie der Bepub- lik Mexico.

Bol Agr. ilf in. —Boletin de Agriciiltura Minena e Industrias puMicado por la Secretaria de Fomento, Colonizaci6n e Industria de la Beptiblica Mexicana. Mexico.

Bol de la Com. Geol. 3Ie) Boletm de la Comision Geol6gica de Mexico. (Con- tinu6 con el nombre de Boletm del Institute Geol6gico).

Bol Ins. N. de Geogr. y FJsif. —Boletm del Institute Nacional de Geografia v Esta- distica. Mexico. (Continu6 con el nombre de Boletm de la Sociedad de Geografia 7 Estadistica de la Bepublica Mexicana).

Bol Inst Geol — Boletfn del Institute Geologico de Mexico.

Bol M. F. — Boletm del Ministerio de Fomento de la Bepublica Mexicana.

Bol 0. 31. C. — Boletin mensual del Observatorio Meteorolbgico Central de Mexico. 1895 y 1896.

Bol Soc. G. Boletin de la Sociedad Guanajuatense de Ingenieros. Guana- juato. Tomos I III, 1888 a 1893.

Bol Soc. Geog. — Boletin de la Sociedad de Geografia y Estadistica de la Eepub- lica Mexicana. Mexico. 6poca, tomos I ii XII, 1SS9 k 1865 ; 2? 6poca, tomos I a IV, 1862 k 1879 ; 3® poca, tomos I a VI, 1873 k 1882 ; epoca, tomos I k III, 1888 a 1896. (El tomo I de la 1? 4poca aparecid con el titulo de Boletin del Instituto Nadonal de Giografta, etc,

Bol Soc. Lig. Jal. — Boletm de ia Sociedad de Ingenieros de Jalisco, Guadalajara. Tomos I a VII, 1880-87.

Bol Soc. mej. Boletin de la Sociedad de Mejoras Materiales. Mexico.

Breirst Journ. Se. — Edinburgh Journal of Science, conducted by D. Brewster. 1829-1832.

Bull. Am. Geogr. Soc. — Bulletin of the American Geographical Society. New York.

Bull. Ac. E. Belgique. — Bulletin de F Academic Koyale des Sciences, etc., de Bel- gique. Bruxelles.

Bull Colo. Sc. Soc. — Bulletin of the Colorado Scientific Society. Denver.

Bull Dept of Geol of the Univ. of Cal. — Bulletin of the Department of Geology of the University of California. Berkeley.

Bull Geol. Soc. Am. — Bulletin of the Geological Society of America. Bochester.

Bull Ind. Min. — Bulletin de la Society de P Industrie Minrale. St. -Etienne.

Bdl Soc. Fr. Min. — Bulletin de Socit5 Franjaise de Mineralogie. Paris.

Bull Soc. Geol Fr. — Bulletin de la Society Geologique de France. Paris.

Bull. Soc. Geol Normandie. — Bulletin de la Societe Geologique de Normandie. Caen.

Bull Soc. Met. It. — Societa Meteorologica Italiana. Bolletino mensuale delPOs- servatorio Centrale del B. Collegio Carlo Alberto in Moncalieri. Torino.

Bull U. S. Geol Survey. — Bulletin of the U. S, Geological Survey. Washington.

C. E. 6 0. E. Ac. Sc. Paris. — Comptes Bendus hebdomadaires des stances de P Academic des Sciences. Paris.

0. E. Soc. Geogr. Paris. — Comptes Bendus des seances de la Societe de Geogra- phie. Paris.

Uongr. Int. Am,— Congreso Internacional de Americanistas actas. Mexico, 1895 (1897).

Bibliogeapht Of Mexican Geology And Mining. 607

Mig. and Min. Jour. — The Engineering and Mining Journal. New York.

Eng. Mag. — The Engineering Magazine New York.

Ferus Bull. — Bulletin Universel des Sciences et de T Industrie, public sous la direc- tion de M. de Frussac. Paris.

Getz, de 2Iex. 6 Gae. de Mex. — Gazeta de Mexico.

Gae. 2Ied. — Gaceta Mdica. Organo de la Academia de Medicina. Mexico.

Uertha. — (Publicacidn citada por L. Agassiz en la Bibliograpkia Zoologioe et Geolog ice).

Inf. y Doc. — Informes y documentos

Jour. Fr. Inst. — Journal of the Franklin Institute. Philadelphia.

Jour, of Geology. — Journal of Geology. Chicago.

Jonrn. Oeol. Soc. — Quarterly Journal of the Geological Society. London.

Karst. Arch. — Archiv fiir Mineralogie, Geognosie, Bergbau und Hiittenkunde, von Karsten und von Lechen. Berlin.

Leonh. Zeitsch. — Zeitschrift fiir Mineralogie. Von K. C. von Leonhard. Heidel- berg.

Mem. del Goh. del E. — Memoria del Gobierno (6 del Gobernador) del Estado de

Mem. 21. F. — Memoria del Ministerio de Fomento.

2Iem. Soc. Ahate. — Memorias de la Sociedad Cientifica Antonio Alzate, publica- das bajo la direccibn de Eafael Aguilar SantilHn, Secretario general. Mexico, Tomos I S. X, 1887 ji 1896,

2Iin. Mineralogical Magazine. London.

2Iin. 2Iex. — El Minero Mexicano. Mexico Tomos I XLI, 1873 k 1902.

2Ion. U. S. Geol. Survey. — Monographs of the United States Geological Survey. Washington.

Fat. 6 La Fat. — La Naturaleza. Peribdico cientifico de la Sociedad Mexicana de Historia Natural. Mexico. serie, tomos I ii VII, 1869 k 1886 serie, tomos I y II, 1887-1896.

F. Jahr. f. 2Iin. — Neue Jahrbuch fiir Mineralogie.

Per Of. del E. de. — Peribdico Oficial del Estado de

Petermami' s 2Iittli. — Dr. A. Pettermann’s Mitteilungen aus Justus Perthes’ Geogra- phischer Anstalt. Gotha.

Phil. 2Iag. — The Philosophical Magazine. London.

Poggendorff Ann. der Ph. u. Ok. — Annalen der Physik und Chemie von Poggen- dorf. Berlin-Leipzig.

Proc. Ac. Fat. Sc, — Proceedings of the Academy of Natural Sciences of Phila- delphia.

Proc. Am. Acad, of Sc. & Arts. — Proceedings of the American Academy of Arts and Sciences. Boston.

Proa. Am. Assoc. 6 Proc. Am. A. A. Sc. — Proceedings of the American Association for the Advancement of Sciences. Salem.

Proc. Am. Phil. Soc. — Proceedings of the American Philosophical Society. Phila- delphia.

Proc. Cal. Ac. Sc. — Proceedings of the California Academy of Science. San Francisco.

Proc. Colo. Sc. Soc. — Proceedings of the Colorado Scientific Society. Denver.

Proc. Geol. Soc. — Proceedings of the Geological Society. London.

Proc. Soc. Fat. Hist. — Proceedings of the Society of Natural History. Boston.

Proc. U. S. Fat. 2Ius, — Proceedings of the U. S. National Museum. Wash- ington.

Prop. Ind. — El Propagador Industrial. Mexico, von, xxxir. — 36

608 Biblio&Raphy Of Mexican &Eology And Mining.

Hegistro Trim, — Registro Trimestre.

Bep, U,S, & Mexican Boundary Survey. — Report of the United States and Mexican Boundary Survey. Washington.

Bep. U. S. Nat Mus. — Report of the U, S. jS'ational Museum. Washington.

Bev. 0. Mex. — Revista Cientihca Mexicana. Mexico, 1879 a 1883. 1 tomo.

Bev. Soc. Abate. — Revista Cientifica y Bibliogrlifica (Sociedad Oientifica Antonio Alzate . Mexico, 1888-1896.

Bev. univ. des mines. — Revue Universelle des Mines et de la Metallurgies etc. Liege.

Scient Am. SuppL — Scientific American. Supplement. New York.

Sm. Bint Esp. — Semanario Pintoresco Espanol. Madrid.

Sib. K. Ahxi. d. TFiss. — Sitzungsberichte der K. Akademie der Wissenschaften. Berlin.

Sitz. K. Bayer. Ak. TTiss. — Sitzungsberichete der K. Bayerische Akademie der Wissenschaften. Miinchen.

Smithsonian Gontr. to Knowledge. — Smithsonian Contributions to Knowledge, Wash- ington.

Smith Bep. — Annual Report of the Board of Regents of the Smithsonian Institu- tion. Washington.

The Nat Hist Beview. — The National History Review.

Trans. Anthrop. Soc. — Transactions of the Anthropological Society. Washington.

Trans. Am. Inst Min. Eng. — Transactions of the American Institute of Mining Engineers. New York.

Trans. Am. Phil. Soc. — Transactions of the American Philosophical Society. Phila- delphia.

Trans. GeoL Soc. — Transactions of the Geological Society. London.

Trans. North of Eng. Inst Min. & Mech. Engin. — Transactions of the North of England Institute of Mining and Mechanical Engineers. New Castle-under- Lyme.

Tram. N. Y. Ac. Sc. — Transactions of the New York Academy of Science.

Trans. Texas Ac. Sc. — Transactions of the Texas Academy of Sciences. Austin.

Yerh. Qeselk. f. Erdkunde zu Berlin. — Verhandl ungen der Gesellschaft fiir Erd- kunde zu Berlin.

Zeit. D. GeoL Ges. 6 Zeit. Beut. Geol. Ges. — Zeitschrift der Deutschen Geologischen Gesellschaft. Berlin.

Zeitschr, f. allg. Erdk. — Zeitschrift fiir allgemeine Erdkunde.

Zeit. f. prak Geol — Zeitschrift fiir praktisclie Geologie. Berlin.

Bibliography Of Mbxicah Geology And Mining. 609

II. Publications Arranged Alphabetically Under Authors’ Names.

1. Aaron, C. A. Procedimiento de amalgamacion. — Min. Mex. IT, 187A~75, nums. 20, 21 y 24.

2- Acuna, "Trinidad, Ingeniero de minas. Pescripcion del Mineral de Mazapil hecho de orden del Gobierno del Estado. — Zacatecas, Tip. del Hospicio, 1877, 8? 41 p. — Min. Mex. IX, 1882-83.

3. Adams, 'W* M. Coals in Mexico, Santa Eosa District. — Trans. Am. Inst. Min. Eng. X, 1882, pp. 270-273.

5. Agfassis;;, Profl Touis. Bibliographia Zologiae et Geologiae. A general catalogue of all books, tracts and memoirs on zoology and geology. — London, The Ray Society. 1848-54. 4 vols. 82 Cita muchas obras referentes a Mexico.

6. Agfraaj, Alejandro. Compama Minera El Zopilote y anexas limi-

tada. Eeseha sobre el estado de las minas y balance del ailo de 1895. — Guadalajara, Imp. Lit. J. M. Yguiniz, 1896, 89 27 p. y 1 cuadro.

6a. Ag'uilar, Amado* El Distrito Minero de Huajicori, Tepic. — Min. Mex. XXXVII, num. 1 (Jul. 5, 1900).

6b. Aguilar, A. La Mineria en Mexico. — Estandarte,” S. Luis Potosi. — Mex. XXXVII, nlm. 15 (Oct. 11, 1900).

7. AgUilar, Bruno. Informe sobre las minas del Rincon del Mineral

de Temascaltepec, formado por para solicitar un fondo de avio. —

Mexico, Imp. de J. M. Lara, 1851. 129 24 p. y un piano y secciones de las minas.

8. Informe sobre la fundicion y ferreria de San Miguel, rendido por el

Visitador Imperial, Grab D {Mem. preseniada d S. M. El Emp. por el

Ministro de Fomento Luis Robles Pezuela de los trabajos ejecutados en su ramo el ano de 1865), pp. 390-394.

9. Informe acerca de las minas de plata del Cerro de Aibadelista. — Mexico,

Imp. de ‘El Porvenir ” prop, de R. Manterola y C, 1875. 89 8 p.

10. Aguilar, Krederico C. Ligero estudio sobre las minas de Mexico y

Colombia — Andes de la Instruccion FUblica. Bogota. 1884, ndm. 42.

12. ASfUilar, Ponciano* Ingeniero de minas. Informe de la zona minera de “ Bolanitos,” Mineral de la Luz. — Bol. Agr, Min.y Die. 1892, pp.

12a. Ag'Uilar y Santillan, R.* Bibliografia geologica y minera de la Repdblica Mexicana. — Boi. Inst. Geol. N. 10, 1898, XI-159 p.

16. Aguilera, Jose G. Informe sobre los placeres de oro del Rio

Bravo. — Bol. Agr. Min. Feb. 1894, pp, 222-231.

16a. Sinopsis de Geologia Mexicana. — Bol. Inst Geol. Nos. 4-6, 1897, pp.

189-250, 1 Carta Geolbgica de la Republica.

17. Informe sobre el mineral de “Puerto del Oro.’ (Coyuca de Catalan,

Guerrero). — Bol. Agr. Min. Nov, 1894, pp. 144-163.

17a. Essai d’une Evolution continentale du Mexique. — Bull. Soc. Geol. Fr.

3s. XXXVI, 1898, pp. 512-516.

18. An41isis de una sal procedente del Lago de Texcoco. — Bol. Agr. Min.

Nov. 1895, pp. 103-105.

18a. El Instituto Geol6gico de Mexico. Sus trabajos desde su fundacidn.

— Bol. Agr. Min. Feb. 1899, pp. 65-85.

18b. Sobre las condiciones tectdnicas de la Repfiblica Mexicana. — An. Ac.

Mex. CL IV, 1898, pp. 103-134.

610 Bibliog-Eaphy Op Mexican Geology And Mining.

18c. Itinerarios geol6gicos. — Bol, Inst. Geol N'os. 4-6, 1897, pp. 78-166. 1

Mm. Estados de Puebla, Tlaxcala, Sonora, S. Luis, NTuevo Le6n, Tamau- lipas, Coahuila, Zacatecas, Hidalgo, Oaxaca, Guerrero, Mexico, Michoacan y Veracruz.

18d. Catalogo sistematico y geogralico de las especies mineralogicas de la

Reptiblica Mexicana. — Bol Inst Geol. No. 11, 1898, p. 157.

18e. Distribucion geografica y geol6gica de los criaderos minerales de la

Kepublica Mexicana.— Mri. Ae. 3fex. Cl Yj 1899, pp. 1-57. — Trans. Am. Inst. 3Iin. Eng.. Yol. xxxii., p. 497.

18f. Bosquejo geologico de Mexico. Proldgo. — Inst Geol. Alex. Bulls. Nos.

4-6, pp. 11-16, 1897.

18g. Fauna fosil de la Sierra de Catorce, San Luis Potosi. — Com. Geol de

Alex. Bull. No. 1, 55 pp. 24 pis., 1895.

18b. The Geology of Mexico. — Com. Geol de Ilex. Abstract : Am. Jour.

Scl 3d ser., yoI. xlvii, pp. 78-79, 1894.

19 . y Ordbnez 5 Kajequiel. Informe de los reconocimientos y

estudios practicados en Gamotlan, San Juan Cuilito y San Jorge Nuchita, pertenecientes al Distrito de Huajuapam del Estado de Oaxaca. — Dyxrio Oficial, Enero 12, 1892.

i9a, Fisiograffa de la Sierra de Pachuca. — Bol. Inst Geol Nos. 7-9, 1897, pp.

21-26, 1 lam.

20. Dates para la Geologia de Mexico. — Tacubaya, Imp. y Fotocol del

Cosmos.” 1893. 8?, 87 p.

20a. Geologia general de la Sierra de Pachuca. — Bol Inst Geol. Nos. 7-9,

1897, pp. 29-50, 3 Mm.

21a. Las Yetas del Distrito de Pachuca. — Bol Inst. Geol. Nos. 7-9, 1897, pp.

53-90, figs, y Mms.

22a. El Stimo Congreso GeolOgico Internacional. Rusia. 1897. — Mexico,

Tip. Seer. Fomento. 1898. 8. 126 p. 6 Mm.

23. Breve explicacidn del bosquejo geol6gico de la Repdblica Mexicana. —

Nat 2?- serie, II, 1894-96, pp. 385-389. Una carta, (1:10 000 000 J.

25. Ainsa, IWT., Ingeniero de minas. DiputaciOn de Minerfa de Hermo-

sillo. Informe sobre la zona carbonifera. — Bol M. F. X, numeros 118 & 119. (Feb. 1886). — Inf. y Doc. para la Estadistiea de la Mineria, pp. 27-32.

26. Alamaiiy lyiicas* Causas de la decadencia de la mineria en Nueva

Espafia. 1821 (?).

Arronis en su ‘‘ Manual de Biografia Mexicana ” cita dicho artxculo.

27. Historia de M6jico desde los primeros movimientos que prepararon su

Independencia en el aho de 1808, hasta la 4poca presente. — Mjico, Imp. J. M. Lara. 1849-1852. 5 t. 8? Mm.

Contiene diversas noticias y documentos relatives it la mineria, acuta- ciones, etc. t. I, pp. 97-101, etc.

31. Alatorre, in., Agente de mineria, Informe sobre el reciente descubri-

miento de ricas vetas de plata y oro en el rancho del Alamo (Sonora). — Bol Agr. Min. Feb. 1893. pp. 327-329.

31a. Alatriste de Iope, Br. J. J. Mineria y Mefcalurgfa entre los Aztecas.— Co?ipr. Int Americ. NI, Mexico, 1895 (1897), pp. 517-520.

32. Alcala, Maxitiiino, Ingeniero de Minas. Sinopsis del tratamiento

metalhrgico de los minerales plomo-argentfferos por fundiciOn en Water- Jackets.— Agr. Min. Mayo, 1895. pp. 146-162 ; Junio, 1895, pp. 78-101 y Jul. 1895, pp. 131-148.

32a. Criaderos de PetrOleo de Pichncalco. Finca de Guadalupe, Estado

de Chiapas.— JYem. Noe. Adate, XIII, p. 311.

Bibliooraphy Of Mexican Geolo&Y And Mining. 611

33 . La fun(iici 6 n de minerales de plomo argentiferos en San Andres de

la Sierra, Estado de Durango. — Min. Mex. XXVII, 1895, ndm. 25.

35. Aldlasoro, Andres 9 Ingeniero de minas. Informe relative al Mi-

neral de San Nicolas de Tamaulipas — BoL Agr. Min. Sept. 1892, pp. 187-

36. Informe de las veedurfas practicadas en las minas del Eosario, ” San

Nicanor,” ‘‘San Pedro,” “LaLuz” 7 “San Miguel,” Distrito de Pa- chuca, Estado de Hidalgo. — BoL Agr. Min. Feb. 1893, pp. 330-337.

37. Informe sobre las veedurfas practicadas en las minas de la Negociaci 6 n

de Eegla, en la mina de Esquipulas de la Negociacion de Esquipulas, en la mina de San Juan del Alto 6 Patrocinio de la Negociacion del Tejocote 7 en la mina de Moran, ubicadas en el Distrito minero de Real del Monte. — Bol. Agr. 1/in. Mayo, 1893, pp. 169-183.

38. Veeduria de las minas de ‘ ‘ Santa Ines, ” “ La Carretera, ” ‘ ‘ Agiiicbote, ”

“Jesus Marfa” 7 la “Dificultad,” ubicadas en el Mineral del Monte. — Bol. Agr. Alin. Oct. 1893, pp. 227-238.

40. Allaro y Pina, Bacbiller. Noticia de los minerales que ba 7

en la Eepublica Mexicana. Mexico, V. Garcia Torres. 1868. 89 50 p.

41. Almaraz, KLamon, Ingeniero de minas. Memoria sobre los tra*

bajos ejecutados por la Comision Cientifica de Pachuca en el afio de 1864. Publicada por el Ministerio de Fomento (Esta memoria es continuacibn de la del Valle de Mexico). — Mexico, Imp. Andrade 7 Escalante, 1865. 89, 358 p. 7 lams.

Comprende la Memoria sobre el Distrito de Pachuca por el Ing. J. M. Romero, pp. 75-190, con un “ Plano minero del Distrito de Pachuca levan- tado por el Ing. de Minas Manuel Espinoza.” 1864 1:10 000.

49. Alsifta, An§fel de* Informe sobre el estado que guardan las minas del

Socavon de Guadalupe, situadas en el Mineral de Otzumatlan, llamadas la Machorra, San Juan, San Francisco 7 San Pedro, Michoacan. — Alin. Alex. I, 1873-74, num. 14.

50. Amador, Alberto, Ingeniero topbgrafo. Inforine que rinde al 0.

General Manuel F. Loera, Gerente de la “ American and Mexican Invest- ment Company,” de la medida y exploracibn de la Zona de San Fran- cisco en el Estado de Zacatecas, ejecutado por el Sr. Juan W. Paurols. — Bol. Agr. Aim. Sept. 1891, pp. 70-78.

52. Amador, M. Q. El socavon de Purfsima (Zacatecas). — Alin. Alex.

XXV, 1894, ndmero 2 .

52a. Notas sobre la Geologia de Zacatecas. — Alin. Alex. XXXVI, ndm. 21

(24 Mayo 1900).

52b. Aiielioiido, ILeandro. El Mineral de Ocampo, Distrito de Ray 611 , Chihuahua. -Jim. Mex. XXXVII, num. 19 (8 Nov. 1900).

53. Anda, de, Ingeniero de minas. Informe presentado en su

examen pnictico de Ingeniero de minas. — Jfm. Alex. IV, 1876-77, num. 18.

54. Anda, Manuel M. de, Ingeniero de minas.

55 . La Minerfa en el Estado de Oaxaca.— Ifm. Atex. HI, 1875-76, ndm-

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50 , LI carbbn de piedra mexicano. La mina del Cristo en la Huasteca.

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57 , Reciirsos minerales de Mexico. — Alin. Alex. Ill, num. 43.

59. El Petrbleo. — Alin. Alex. IV, 1876-77 ndmero 43.

00 . Pirdidas de metales en el beneficio por patio en Guanajuato. Notas

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612 Bibliography Of Mexican Geology And Mining.

01. Genesis de las vetas metaliferas. — Mci. IV, nura. 46.

02. Informe relative d la esploracion del Distrito de Coalcoman.— Mexico,.

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1883-85, V, pp. 109-147. — 2Iin. J/er. XL 63. AndonaegfUi, Jtaan B., Ingeniero de minas. Memoria acerca de la amalgamacion de minerales de plata y fundicidn de minerales de cobre. — An. Col. 2Iin, 1859, pp. 52-70. — 2Iin. 2[ex. VII, 1880-81.

65. Andrews, K.. P. Eefinacion de plata y oro. — 2Iin. 2Iex. XXIII,, 1893, niim. 19.

65a. Anza, Jose V. de. La Mina de Pedregal, Taxco de Alarcon Guerrero. Un informe antiguo. — 2Iin. 2Iex. XXXIX, num. 16 (17 Oct. 1901).

67. Araujo, G. Informe que da la Diputacion de Mineria de la capital de

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68. Arce, Oral. Francisco O. Memoria presentada al XI Congreso

Constitucional por el C Gobernador del Estado de Guerrero. — Chilpan-

cingo, Imp. del Gob. del Estado, 1890, fob

Con dates relatives a las producciones minerales de todas las Munici- palidades.

70. Arenas, Pascual F., Ingeniero de minas. Memoria sobre el nuevo

beneficio de los minerales de plata llamado de tinas 6 soluciOn. — Mexico, Imp. de I. Cumplido. 1853. 89 11 p.

71. DescripciOn del m4todo de solucibn, tal como se practicaba en la

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72. Geologia. Descripcibn geologica y minera del Mineral del Fresnillo.

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74. Argali, Felipe, Ingeniero de minas. El procedimiento de fundicion

por medio de las piritas. — 2£i7i. Mex. XXIV, 1894, . 20 y 21.

75. Procedimiento de extraccibn del oro y de la plata por medio del cia-

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75a. Armas, Miltiades P. The Eeduction- Works for Silver-Ores at Adu- ana, Sonora, Mexico. — Jour. Franklin Inst Oct. 1898, pp. 293-302. — 2Iin. 2Iex. XXXIII, numeros 21 & 22 (24 Nov. & 1 Die. 1898).

77a. Arriada, Fernando de* Historia Minera. Documentos de la Mineria del Distrito de Hidalgo del Parral, Estado de Chihuahua. — il/w. 2Iex. XXX, nbmeros 24 & 25, XXXI, niim. 1 (Jun. & Jul. 1897).

78. Arriaga, Jose Joaquin, Ingeniero topbgrafo. Explotacibn de la

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79. Companias Mineras. — 2Iin. Mex. I, mum. 30.

81. Arroni, Joaquin* Ensayo de una Historia de Orizaba. — Imp. de J. B. Ahurto. 1867, 129 650 p. y lams.

En la 19 parte que trata de la EstadisUca Fisica de la Ciudad y de su Valle contiene una descripcibn general, el perfildel camino de Veracruz al Pal- mar (con el corte geolbgico, de Dollfus y Montserrat), altitudes y geologia de las montanas y del valle de Orizaba, pp. 1-44.

83. Astudillo, Xaide y Informe relative i las Grutas de Omea-

pan, ubicadas en la Municipalidad de Tixtla, del Distrito de Guerrero.— Mem. del Gob. del E. de Guerrero, 1890, pp. 27-32.

84. Austin, I. Fundicion por medio de las piritas. — 2Iin. Mex. XXIV,

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84a. Austin W. lawrence. Smelting Notes from Chihuahua, Mexico. — Trans. Am. Inst. Min. Eng. XII, p. 185.

84b. A Mexican Ciipellation Hearth, — Trans. Am. Inst. 2Iin. Eng. XIII, p. 41.

85. Airila, KsteTan. Informe que da a la Sociedad Minera Mexicana, sobre el estado actual de la Mineria en el Fresnillo. — Min. Mex. II, 1874- 75, num. 28.

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91. Orologia. Estudio sobre los porfidos cenozoicos de Mexico. — An. Soc.

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99 . Viaje d la Caverna de Cacahuamilpa. Dates para la Geologfa y la

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104. El Wad ooHtico.— La Nat III, 1874-76, pp. 136-138.— 3/m. Alex. II,

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106. The Rocks known as Mexican Onyx. — Proe. Ac. Nat. Sc. Phila.

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614 BIBLIOaEAMY OF MEXICAE- GEOLOaY AND MINING.

111. Dictamen sobre las Observaciones sobre los caracteres que presentan

al soplete los minerales de plata” por D. Severe JSTavia. — La Nat III, 1874-76, pp. 201-202.

112. Descripcibn de un crust4ceo fosil del genero Spheroma [Spherovm Bur-

karti) y reseda geolbgica del Valle de xAmeca de Jalisco. — La JSfat. Ill, 1874-76, pp. 355-361, 3 figs.— Prop. Ind. Num. 11, pp. 122-124.

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I, pp 8-10. — Min. Mex. VIII, num. 21. (repetido en el iitim. 13, t. IX).

126. El Linarite de Mexico. — La Nat IV, 1877-1879, pp. 55-56. — Bol. 31.

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128. Comunicacion a la Sociedad Mexicana de Historia ISTatural. — La Nat

IV, 1877-79, pp. 272-274.

Se refiere a la Linvingstonita encontrada en Guadalcazar.

129. Criaderos minerales en la Municipalidad de Ameca de .Jalisco. — JIbi.

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130 . La cal hidr4ulica. — 3Iin. Mex. VII, num. 32.

132. Noticia Geolbgica del Valle de Guadalajara.— Pe?;. 0. 3fe.T. ISSO,

num. 12, pp. 12 & 13. 3Iin. 3Iex. VII, num. 44, (repetida en el ndmero 15 delt. VIII).

133. La 2? Exposicibn de “Las Clases Productoras” y descripcibii de la

ciudad de Guadalajara. Estudio presentado a la Secretaria de Fomento. — Guadalajara, Tip. de S. Banda, 1880, 8?

Mineria y Metal urgia, pp. 201-207 ; Naturaleza del terreno, 256-262. Ans. 31. F, IV, 1881, lams. Mineria y Metalurgia, pp. 163-140 ; Xatu- raleza del terreno, 166-171 ; Materiales de construccibn, 201-202.

134. Los Criaderos de carbbn. — 3Iin. Mex. VIII, num. 1.

135. Los yacimientos de diamante — 3Iin. Mex. VIII, num. 61.

136. Xoticias geolbgicas de algunos caminos nacionales. — 3Ius. Nac.

II, 1882, pp. 267-270, 311-314 & 431-434. -Per. C. 3Iex. Nilms. 14, 16 y 20. — 3Iin. 3[ex. VIII, num. 14yIX, ndm. 11.

137 . Descripcibn de un bneso labrado de llama fosil encontrado en los te-

rrenes posterciarios de Tequisquiac, Estado de Mexico. — M?is. 3Im. Nar. II, pp. 439-444, 1 lam. Rev. O. 3Iex. Xiim. 22. — 31in. 3Iex. IX, ndm. 22.

139. Sobre el origen de algunas rocas. — Nat. VI, 1882-84, pp. 6-9. — Rev.

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147. Apuntes relatives 4 la Geologia del Estado de Jalisco. — Nat

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149. Barqttera, Juan Cecilio* Planilla circular usada en el Mineral

de Guanajuato. — Am. 3Iin. 3Iex. I, 1861, pp. 254-260.

150. Barros, Antonio K# die* Informe relative la mina de San Sal-

vador en la Sierra de Coronados. (E. de San Luis Potosf). — Min. 3Iex. 1, 1873-74, ntim. 38.

151. Barro®, Jose IBaria* Convenienciade libertar 4 la Mineria

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152. Karroso, Agflistin, Ingeniero de mixias. Memonasobre la Geologia

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153. [Bartlett, Jolin Russell. Personal Narrative of Explorations and

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6 Company. 1854. 89 506 & 624 pp.

Comprende interesantes y variados dates referentes a Geologia, Mine- ria, etc.

153a. Barret, Rolsert S. El Oro. Some Information About One of Mex- ico’s Greatest Mining Camps. — The Mexican Herald, July 31, 1899, p. 2. 154a. Ba, CrUStavo and IE. I. Oallo. History of the Mexican Rail- way. Gallo & Co. Mexico. 1876.

155. Becerra, Jose Blaria. Iniciativa presentada a la Legislatura

del Estado de Chihuahua, para que se eleve al Soberano Congreso Na- cional, con el fin de mejorar la situacion de la Mineria en la Reptiblica. — Min. Mex. II, 1874-75, num. 22.

156. Becker, Georgfe F. Geology of the Quicksilver deposits of the

Pacific Slope, with an iltlas. — Mon. U. S. Geol. Survey, XIII, 1888. Mexico, (Guadalcazar, Huitzuco, etc ), pp. 16-19.

157. Begfnerisse, Fedro, Profesor de Farmacia. Andlisis de las aguas

hidro-sulfurosas de los baiios del Ojo de Santiago en Puebla. — Nat. II, p. 27d.—Mm. Mer. I, 1874, nfim. 52.

157a. Belden, F. Compania minera fundidora y afinadora (Monterrey, N. L.). Informe sobre los trabajos llevados i cabo en su hacienda de beneficio durante el ano fiscal de 1895-1896 y resumen de los anos de 1892-1896. — Bol. Agr. Min. Ene. 1899, pp. 67-71.

158. Bellet, Bauiel* Le district minier de Guanajuato, au Mexique. —

G. R. Soc. Geogr. Rari. 1893, pp. 306-307.

158a. L’ exploitation des opals au Mexique. — La Nature, 29 Janvier 1898,

p. 131.

160. Bergflies, diaries de# Descripcion de los arrastres mexicanos. — Archiv.f. Min. &. Karsten & Uechen. XXI, p. 334.

164. Berrio de Moiitaltio, Xuis# Informe sobre las minas de Tasco, y modo de beneficiarlas. — 1634, fol.

166. Biancoui, F. Le Mexique a, la ported des industriels, des capital- istes, des ngociants importateurs et exportateurs et des travailleurs. Avec une carte du Mexique (1 :500 OOO), commerciale, routiSre, miniere et agricole. — Octobre 1889. — Paris, Imprimerie Chaix, 1889. 189 144 p. R$gne mineral, pp. 39-57 ; Les Etats miniers du Mexique, pp. 58-75.

157 . et Balestrier, l[<ouis de. Etats-Unis du Mexique. — (Cartes

Comerciales, Physiques, Polytiques, Administi'atives, Routibres, Ethno- graphiques, Minires et Agricoles avec Notice descriptive, etc. ) 49 l’® partie, 52 p., Mai 1889 ; partie, 36 p., Septembre 1889. — 2 cartas. 1:3 000 000. — Paris, Librairie Chaix.

1® partie. Geographic physique : Configuration ; pics et volcans, p.

7 & 8. — Regne mindral ; traitement des minerais ; industrie des mines et depreciation de 1’ argent ; mode d’acqiierir des mines au Mexique; contribution sur les mines ; grandes Compagnies minieres ; mercure, plomb, fer, cuivre, etc. pp. 25-29. — 2® partie. Monographie les Etats du Mexique.

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169. BirliilllJilie, Johm. Tlie Cerro de Mercado (Iron Mountain\ Du-

rango, Alexico. — Tram. Am. Inst. J/m. Eng. XIII, 1885, p. 189-209. — Eng. and Min. Jour. XXXAMI, 1884, pp. 199-200.

170. Informe snbre el Cerro de Mercado de Durango. — Min. Mei. X, 1884,

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X71. The Production of Iron-Ores in Various Parts of the World. — (Mineral

Resources of the U. S. ). — Ann. Rep. TJ- S. Geol. Survey. XVI, 1894-95, III.

Mexico, pp. 59-62. Se ocupa especialmente del Cerro de Mercado, de Durango. Acorn paila un mapa de los yacimientos de fierro en toda la America del Norte.

172. Apuntes sobre la ingenieria en Mexico. Leidos el 6 de Marzo de

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173. El hierro en Mexico. — Min. Mex. XXVII, 1895, niim. 3

174. Blake, William P. The Chalchihuitl of the ancient Mexicans. —

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177. Bloodwortli, S. El oro y la plata. Posicion de Mexico. -Min. Alex. XXIV, 1894, nhra 17.

179. Bolland, JUuis* Informe sobre el estado que guarda la mina ‘‘Santa Teresa de Jestis,’’ antiguamente llamada “ San Josd Pacuaro,’ situada en la municipalidad de Cutzamala, Distrito de Mina, Estado de Guerrero. — Afm. 3Iex. I, 1873-74, num. 22.

177a. Bonifant, IWt. Los placeres de CalmalH, Baja California. — Min. 3Iex. XXXIX, niim. 18 (31 Oct. 1900).

181. Bonillas, I*, Ingeniero de minas. Informe acerca de las explora-

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182a. Borneque, X. ExposiciOn que hace al publico sobre el

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182c. Ein Profil durch den Ostabfall der Sierra Madre Oriental von Mex-

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182d. Geologia de los alrededores de Orizaba con un perfi de la vertiente

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183a. Boss, in# P. The Pachuca Stamp-battery and Its Predecessors. — Eng. Aim. Jour. LXXII, No. 22, Nov. 30, 1901, p. 713.— Am. Inst Aim. Eng. vol. XXXII, p. 244.

183b. Bossuat, H# Informe que la Compailfa del Boleo rinde a la Secretaria de Fomento, sobre los trabajos ejecutados en el afio fiscal de 1 de Julio de 1896 4 30 de Junio de 1897.— Ro/. Agr. Aim. Jun. 1897, pp. 154-167.

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186. Boiig:lise, I>e la et Cumeng:e, K. Etude sur le district cu-

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190. Boiissingfawlt, J. O. Composicion del oro native en la Niieva Granada. — Min. Mex. IX, 1883, ntim. 18 192. Jose Informe sobre la riqueza del Mineral de Coneto,

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195. Hramtiila, Alejandro* Informe de la Zona Minera de ‘San Agustin,” ubicada en Chinipas, Estado de Chihuahua. —5oZ. Agr. Mbi. Agosto 1892, p. 184.

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197. Bros 9 Camilo* Informe dado por el C al C. Marcos Garcia

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198. Mina de la Purisima Concepcion en el Bernalejo (E. de San Luis Po~

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204a. Itinerarios geologicos. Estados de Durango, Chihuahua, Sonora y

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205. Informe sobre la exploracion geolbgica de una parte del Estado de

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205a. The Copalqum and Lemon mineral zone, Durango, Mexico. — JEng.

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206. Informe por la Comision Geologica, en diversas regiones de los Estados

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206a. Bullock, W. Six Months Residence and Travels in Mexico. 2 vols. London, 1825. John Murray. It contains a fine illustration of the valley and city of Mexico.

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208. Burkart, Joseph. Geognostische Bemerkungen, gesammelt auf einer Reise von Tlalpujahua nach Huetamo, dem Jorullo, Patzeuaro und Valladolid, im Staate von Michoacan. — Karsien Archivfilr MineralogUj, &. Berlin, 1832, V, pi. TIL

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211. Ueber einen neuen Feuerausbrucb in dem Gebirge von Real del Alonte

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cion geologica. — Sol. Soc. Gcog. 2? e. I, 1869, pp. 82—111. 1 mapa.

215. Resumen de los resultados obtenidos en la explotacion de las minas

de Pachuca y Real del Monte, durante losafios de 1859, IS60 y 1861.— RoZ. Soc. Geog. e. II, 1870, pp. 559-593.

210. La Guadalcazarita . — La Nat. II, p- 236 & 237.

217. Examen y clasificacion de algunas especies minerales de Mexico.

Nat. Ill, 1874-76, pp. 248-253, 288-291 y 336-342. —A/m. 3Iex. Ill, ntim. 9.

217a. Burr, G. A. Petroleum in Texas and Mexico.— 3£m. Jour. LXXI, No. 22, June I, 1901, p. 687.

220. Bustamante, Beiiigfuo# Memoria geogrdfica y estadistica del Es- tado de Guanajuato. — Sol. Soc. Geog. p. I, p. 54-87.

Se ocupa del Reino mineral dando noticia de las minas, sus productos, canteras, aguas minerales, salinas, etc.

231 . y Cortina, Jose Gomea? de la, Conde de la Cortina. La

Caverna de Cacahuamilpa. — Sol. Soc. Geog. I, pp. 87-95.

222. Bustamante, Jose M., Ingeniero de minas. DescripciOn de la

Serrania de Zacatecas. Aumentada y combinada con pianos, perfiles y vistas trazadas en los ahos de 1829, 1830, 1831 y 1832 por C. de Berghes. — Mejico, 1834. Imp. de Galvan a cargo de Mariano Ar<valo. fol. VIII -40 p.

223. Bustamante, Migfuel, Ingeniero de minas. Informe sobre los

criaderos carboniferos de las Huastecas- — Ans. 3L F. VII, 1882, pp. 538 -547. — 3Im. 3Ie\. X.

225. Bustamonte, Mi§ruel, Bijo. Observaciones sobre la cloru-

racion 3Iin. 3Iex. XVIII, 1891, numero 4.

326. El nuevo beneficio de plata y oro por iexiviacion. — 3Iin. A/e.r. XX,

1892, niim. 1.

227. Apartado de los inetales preciosos conteiiidos en la plata pasta. — i/m.

3Iex„ XXIV, 1891, numeros 6 A 7.

228. La explotacion del oro en MAxico. — 3Iin. 3lei. XXIV, 1894, nilmero

228a. Estudio sobre algunos criaderos nietaliferos del Estado de Alichoacdii.

-i/m. Mex\ XXXIII, ntim. 6 (11 Agosto 1898).

228b. Estudio sobre los mtodos de amalgamaci6n y especialmente del

llamado de Patio ” con el objeto de evitar las piSrdidas del mercurio. — i/m. 3Iex. XXXIX, ndm. 18 (31 Oct. 1901) y 19 (7 Nov. 1901).

229. Bustamante y Bustillo, Jose Alejandro. Informe

dado al Sr. Conde de Revillagigedo, virey de Mdxico, sobre la Minerla de Nueva Espana.— Mexico, 1748.

231. Busto, Emiliano. Estadistica de la Reptiblica Mexicana. Estado que guardan la Agricultura, Industria, Minerla y Commercio, Agosto

Bibliography Of Mexican Geology And Mining. 619

de 1877. — Mexico, Imp. de LCumplido. 1880. 3 t. 49 (Anexo niim. 3 a la Memoria de Hacienda del aiio econdmico de 1877 a 1878).

El tomo II esta consagrado a la Mineria y contiene importantisimos estudios, informes, dates estadisticos, etc., tornados de diversos autores que pocas veces cita.

232a. Catallero, Antonio El Mineral de San Jose de Gracia, Sinaloa.— J/in. 3Iex. XXXIII, ndm. 25 (22 Die. 1898).

233. Catorera, Klorencio* Estudio sobre el bismuto. — J/m. Mex. I, 1873 -74, niims. 24, 25, 26, 27 y 28.

233a. Caiirillo, Quirino. La Mineria Distrito de Ario, Macboacan. — Jfm. 3/e.r. XXXVII, ntim. 25 (20 Die. 1900).

235. CamactiOj Sebastian* Carta dirigida al Senor Ministro D. Matias Komero, sobre la cuestion de mineria. — Mexico, Imp. de I. Escalante, 1871. 89 33 p.

237. Campillo H. Las Minas de Zacatecas. — Min. Mex. IX, 1882-83,

ndm. 16.

238. Canseco, Manuel A la Comision de mineria en Tamaulipas

para la Exposicion de Paris. — Mem. del Gob. del E. de Ihmaulipas. 1889, pp. 196-198. 1 lam.

241. Cardenas, Juan. Primera parte de los problemas y secretos mara-

villosos de las Indias. Compuesta por el Dr M4dico. Dirigido

al Ilustrissimo Senor Don Luys de Velasco, Virrey desta nueva Espaiia. — Mdxico, Pedro Ocharte, 1591, 89 246 p.

Se ocupa con extension de los terremotos, volcanes, constitucidn del terreno y beneiicio de minerales.

241a. Carmona, Pantaleon* Las Haciendas de Beneficio en el Cedral (E. de S. Luis Potosi). — Min. Mex. XXXI, ndm. 1 (1 Jul. 1897).

243. Carrasco, Bibiano, Profesorde Quimica general en el Colegio

del Estado de Puebia. Fierro en las aguas potables de Puebla. — El Estudio (Soc. Med. Farm, de Puebla). I, 1875, pp. 21 & 22.

244. Estudio de las aguas de Axocopam (Distrito de Atlixco, Estado de

Puebla). — Mexico, Tip Secretarla de Fomento, 1889, 49 31 p,

Se publicd en El Estudio,” drgano del Institute Medico Xacional.

245. Carreri, Oemelli. Voyage au Mexique. — (Collection de tons les

voyages faits autour du monde, redigd par M. Besenger, Paris, 1788. 8? ). 11, p. 390.

Trata de su visita i las minas de Pachuca (citado por Burkart).

246. Carricarte, Ricardlo. El Distrito del Bosario, Sinaloa. — Min

Mex. XXV, 1894, ndmero 13.

248. Carrion, Cuis* Plano de las pertenencias de las Minas del DistritO'

de Pachuca construido por 1892. 1:10 000. — Mexico, Lit. de C. Montauriol Sue.

248a. Carson, P. Iron Manufacture in Mexico. — Trans. Am. Inst. Min. Eng. VI, p. 398.

249. Castaneda, Ramon Mineral de Chalchihuites (Estado de

Zacatecas). — Min. Mex. IX, 1882-83, ndm. 37.

254. CastelaaO, Ismael* Mineria prdctica. Tratato escrito a beneficio de los mineros pobres. — Culiacto, 1873.

257. La Mina del Zapote. — i!/m. Mex. X, 1884, nfim. 21.

258. CastelaO, Jose RodrigfO de* De la riqueza de las minas ubica-

das en el Beal del Monte, jnrisdiccidn de Pachuca. — Mexico, 1820.

620 Bibliography Op Mexican Geology And Mining.

Se lialla citada en el Catdlogo de la Bihlloteca de Andrade pero es prob- able que se refiera al manuscrito de la obra siguiente.

259, Alanifiesto de las riquesas que ban producido y actualmente contienen

las celebradas minas de las vetas Vizcaina y Santa Brigida, ubicadas en el Real del Monte, jurisdiccion de Paciiuca, de las grandes obras que en ellas se hicieron y del estado en que actualmente se hallan. Mexico, 1823. Imp. de M. Ontiveros. 8 . 46 p.

261. eastern, Fedro. Las Minas y los Mineros. 21* edicion.— Mexico

Tip. de F. Mata. 1887-1888. 2 tomos, 89

262. Castillo, Antonio del, Ingeniero de minas. Resumen de los

trabajos que sobre reconocimiento de criaderos y minas de azogue se practicaroii el afio de 1844 bajo la Direccion de la Junta de lomento y Administrativa de Mineria. — Mexico, Imp. de la Sociedad Literaria. 184o. 8? 29 p., 1 tabla de los criaderos y minas de azogue de la Reptiblica 7 3 pianos.

En La Nat. (con notas y adiciones del autor), II, 1871-1873, pp. 39- 140. 6 lams.

263. Ciiadro de las especies mineralogicas de la Eepublica. 1846.

264. Instruccion sobre las vetas metaliferas. Discurso leido el 17 de Noviem-

bre de 1848.— An. Col Min. Ano de 1848, pp. 54-64. 6 lams.

265. Notas sobre algunos minerales. — An. Col. 3Iin. 1848, p. 65-69.

266. Rapida exploracion geoldgica de las montanas immediatas al Norte de

la Ciudad de Tebuacan y del cerro Tlachique al Sur de Tepeyahualco.— JBol. Ins. N. ae Geogr. y JEst. Mexico, I, 1849, pp. 336 a 340. — Min. Mex.

267. Informe sobre un reconocimiento de un criadero de plata en Santa

Cruz Miahuatlan. — Mexico, Enero 1851.

268. Reconocimientos de las minas y criaderos de hierro cerca Xonacatepec

y Xalostoc.— Eo/. Boc. Geog. 19 4poca, III, 1852, pp. 64-70 y 2 Urns.— Min. 3Iex. VIII.

269. Riqueza mineral de la Reptiblica, Articulo 19 Peninsula de la Baja

California. — Mexico, Imp. de I. Cumplido. 1861, 8? 46 p.

270. Catalog© de las especies minerales y de sus variedades que se encuen-

tran en Mexico. — Mexico, 1864. Imp. de A. Boix cargo de Miguel 2ornoza. in fol. 10 p.

271. Descripcion de la masa de hierro meteorico de YanhuitHn, recien-

temente traida esta Capital, y noticia y description de las masas de hierro rnetebrico, y de piedras meteoricas caidas en Mexico. — (Nov. 1864). Bol Soc. Geog. la 4poca, X, p. 661-665.

272. Cuadro de la mineralogia mexicana, conteniendo las especies mine-

rales dispuestas por orden de su composicion quimica y cristalizaoiOn, con arreglo al sistema del professor Dana. — (Nov. 1864). BoL Soc, Geog.l 4poca, X, pp. 564-571. — 3fm. Afex. VIL

273. Indicaciones acerca de la reforma de las Ordenanzas de Minerfa. —

Mexico, 1866. (‘‘ElAiioNuevo.’M

Se hizo una reimpresidn en 1871, Imp. I. Escalante, fob 8 p. (“El Derecho.’O

275. Eos Criaderos de Azufre de Mexico y su explotacibn. — La Nat I,

1869-70, pp. 44-50.

27 6. (Clasificacibn de mamfferos fosiles del Cuaternario del Valle de Mdxico. )

— Zeits. Lent OeoL Gesells. Feb. 3, 1869.

277. La Quadalcazarita. — La Nat. II, pp- 237 & 238.

Bibliography Op Mexican Geology Axd Mikikg. 621

278. Descubrimiento de una nueva especie mineral de bismuto. - La Nat.

II, 1871-1873, pp. 274-276. — Min. Mex. I, num.20.

281. Descripcion del mineral bismutifero de San Luis Potosi descubierto

por el Sr. L. Florencio Cabrera . — La Nat. Ill, 1874-76, pp. 92-94.

282* Noticias sobre los criaderos de grafita 6 plombagina de Mexico j su

explotacion . — La Nat. Ill, 1874-76, pp. 275-281 . —Prop. Ind. Ndm. 16.

283. Un nuevo El Dorado mexicano. — Min. Mex. II, 1875, num. 12.

Habla del descubrimiento de placeres de oro en el Norte de la Baja California.

284. Adelantos de la Geologia y Paleontologia del Valle de Mexico. — Min.

Mei. IV, 1878, ntim. 41.

285. Las supuestas minas de carbon de piedra, de plata, cobre, etc., en el

Valle de Mexico, y montanas que lo circundan. — Mm. l/er. VII, 1880, ndm. 6.

286. Paleontologia y Geologia del Valle de Mexico. — Min. Mex. VII, 1880

-81, ntim. 11.

288. Informe sobre el estado geologico actual del Penon de los Banos. —

Bol. M. F. IX niimero 79 (29 Die. 1884), p. 316.

289. Catalogue descriptif des Meteorites (Fers et Pierres Metoriques) du

Mexique avec I’indication des localit4s dans les quelles ces meteorites son tombes ou ont 4t4 decouverts. — Paris, Impr. Lon Quin, 96, Eue du Bac. 1889. 8? 15 p. & 1 carte : Plan de la B4gion ou sont tombes les plus remarquables meteorites (1:400 000).

290. Bosque jo de una Carta Geoldgica de la Keptiblica Mexicana. 1889.

1:3 000 000. — Paris, Erhard Hnos.

291. Carta Minera de la Keptiblica Mexicana. 1 : 3 000 000. Paris, Er-

hard hermanos. (1889).

292. Corregida en 1893. 1 :2 000 000. Construida y dibujada por Luis G.

Becerril. — Mexico, Lit. de Em. Moreau y H9

293a. ComisiOn Geol6gica. Plano geol6gico de las minas de fierro dela Fer-

reria de la EncarnaciOn y del Distrito Minero de San Jose del Oro, formado

por el Ingeniero de minas L. Cabanas y E. Ordbnez, miembros de

la Comisidn. — Escala 1 : 20 000. Levantado en 1888. Impreso en 1893. — Lit. Em. Moreau y Hno. — Mexico.

293b. Plano geoldgico minero del Real de S. Antonio y El Triunfo, de la Baja

California. Kevisado en 1889. — Escala OOOl por 40ins Dibujo Luis G. Becerril. — Lit Em. Moreau y Hno. — Mexico.

296. Noticia historica sobre los placeres y criaderos de oro de la region

iibicada 4 25 kilometres al S.O. de Coyuca de Catalan (Guerrero). — Bol. Agr. Min. Nov. 1894, pp. 115-143.

297 . y Agfiiilera, Jose G. Fauna fdsil de la Sierra de Catorce, San

Luis Potosf. — Bol. de la Com. Geol. 3£ex. Ntim. 1. Mexico, 1895. 49 IX- 55 p. 24 .

298. Castillo, Antonio del y Barcena, Mariano. Noticia de

la existencia del arsenico native en la Keptiblica Mexicana. — Nat. II, 1871-73, pp. 313 & 314. — 3Iin Mex. I, ntim. 52.

300 . j Ordoiie, Bequiel. Plano geoldgico y petrogrUfico de la

cuenca de Mexico, Kegidn S.O. Formado por la Comisidn Geoldgica Mex- icana. 1893. Escala 1:200 000. — Lit. Em. Moreau y H? Mexico.

Contiene tambien un Corte geoldgico de la barranca de San Lorenzo y C9 del Guajolote, y otro de la Sierra de las Cruces.

301. Castro, Migfuel* Informe de varies Minerales del Estado de Oaxaca.

—Min. Mex. XI, 1884, ntim. 28.

622 Bibliography Of Mexican Geology And Mining.

302. Cavo, Andres. Los Tres Siglos de Mexico durante el gobierno espafiol. Publicado por Pon Carlos Marfa Bustamante. — Mexico, Aba- cliano, 1836. 4 t. 8?

Trae interesantes noticias acerca de la Casa de Moneda de Mexico, acunacion de oro y plata, la explotacion de las minas, el Tribunal de Minerfa, etc.

304. Caain, Francisco F, M., Ingeniero civil y de minas. Separacidn

y concentracion mecanica de los minerales. — Min. Mex. IV, 1877, nums. 45 y 52.

(Escrito en ingles para el Min. Mec. y traducido al espanol por M. M. de And a).

305. Aparato de Moebius para separar por electrOlisis el oro y la plata. —

Min. Mej. XVIII, 1891, numero 12

305a. Cerda, Hafael de la* El nuevo Mineral de Santa Ana del Valle, Tlacolula, Oaxaca. —Min. Mex. XXXVIII, niim. 1 (3 Ene. 1901) y 7 (14 Feb. 1901).

307a. Cincinnatus* Travels in the Western Slope of the Mexican Cordil- lera. San Francisco, 1867.

308. Clarke, W. Ancient Mexican Cement. (From an antique floor on

the Hill of Texcocingo. Analysis by ) — Bull. U. S. Geol. Survey.

No. 27, 1886, p. 72.

308a. Clark, IWfaurice. Notes on Mining in Oaxaca, Mexico. — Eny. Min. Jour. LXIV, 1897, pp. 35-36.

309, Claudet, C. Minerfa y beneficio de metales en la Mina de oro

‘‘ El Mezquital del oro’ (Zacatecas). — J/eo:. XX VI, 1895, . 25 & 26 & XXVII, ndm. 1.

311. Cl ernes, Sobre la inconveniencia de la prohibiciOn de la ex- portacion de metales en polvo. — Min. il/er.1, 1874, ntim. 23.

313. Collins, Henry ExplotacI6n de las minas de mercuric en el

Distrito de Guadalczar, S. Luis Potosi. — 2Iin. Mex. XXIX, 1896, nCims. 18, 19, 20, 21 & 22.

313a. Note on Cheap Gold-Milling in Mexico. — Trans. Am. Inst. Min. Eng.

XXXI, p. U6.—3Im. 3fex. XXXVIII, niim. 10 (7 Mar. 1901).

314. Colqilkoun, Capt* On Masses of Meteoric Iron Found in Mexico

and Potosf — Trans. Geol. Soc. 2d. ser. Ill, p. 491.— Proc. Geol. Soc. Ill, p. 488. — Phi. Mag. 3d. ser. Ill, p. 372.

315. Comes, Cliarles F. Exploration des gites de minerals mdtalliferes

et autres substances mindrales employees dans les constructions et I’in- dustrie. — Arch. Comm. Sc. 3Iexiqm. I, Paris, 1865, pp. 78-84.

315a. Comely, V. H. de. The gold resources of Mexico. — Eng. 3Iin. Jour. LXVII, 1899, pp. 320-321 348.

316a. Contreras, Joaquin. Mineral de Guanacevf, Durango. Informe que el Tefe Municipal rinde al Supremo Gobierno del Estado de Du- rango. — Min. 3fex. XXXII, num. 1 (6 Ene. 1898).

320. Contreras, Manuel M., Ingeniero de minas. Empleo de los en-

sayos de pella y de residues para determinar los adelantos y fin de la amalgamaciOn de la plata en el beneficio de patio. — Ans. Soc. Humboldt. I, 1872, pp. 326-339. — Min. 3fex. I, nums. 45, 46, 47 y 48.

321. Observaciones relativas al empleo de la concentracibn de los minerales.

— Ans. Soc. Humboldt. 11, 1873, pp. 62-75. — Min. Mex. II, ntims. 1, 3, 4 y 5.

322. Memoria sobre el clllculo del trilbajo mecdnico de un mortero para

grancear los minerales. — Am. Soc. Humboldt II, 1873, pp. 91-99.

Bibliogbaphy Of Mexican Geology And Mining. 623

323. Eesena de los trabajos de la Sociedad Mexicana de Mineria, leida el 4

de Febrero de 1884 por el primer Secretario de la Junta Dixectiva. — Mexico, Tip. Secretaria de Fomento, 1884, 167 p. y 2 cuadros. — Mem, M. F. 1883-85, V, pp. 181-201.

324. Eesena de los trabajos de la Sociedad Mexicana de Mineria leida el

5 de Febrero de 1885 por el Ingeniero Primer Secretario de la Junta

Directiva.— Mexico, Tip. Secretaria de Fomento, 1885. 12? 41 p.

326. Cope, I>. The Loup Fork Miocene in Mexico. — Am. Nat. XIX,

1885, p. 494-495,

327. Eeport on the coal-deposits near Zacualtipan, in tke State of Hidal- go, Mexico.— Proc. Am. Phil. Soc. XXIII, 1886, pp. 146-151.

328. Informe acerca de los criaderos de carb6n de piedra de Zacualtipan,

Estado de Hidalgo. —iVdi. 2?- serie, I, 1887, pp. 393-397.

330. Corral, Btanibll* Memoria de la Administracidn pdblica del Es- tado de Sonora, presentada d la legislatura del mismo por el Gobernador

Guaymas, Imp. de E. Gaxiola. 1891. 2 t. fol.

Contiene una seccibn con datos muy importantes de la mineria y la acufiacibn, pp. 249-254 y 274r'357 (Tomo 11).

330a. Correa, Alticrto. Eesena econbmica del Estado de Tabasco, Mdxico. Tip. Sec. Fomento. 1899. 89 165 p. 4 lams. 1 mapa (1:825 000). Min- erales, pp. 28-30.

333. Corte, Martin del* El Partido de Tamazula (Estado de Durango).

— Min. Mex. XXII, 1893, nums. 12 & 13.

334. Cortes, BCernan b Fernando* Carta, 6 quarta Eelacion que

el Gobernador i Capitan General por su Magestad en la Nueva Espana del mar occeano, embib al mui alto i mui Potentisimo, Invictissimo Senor Don Carlos, Emperador siempre augusto, i Eei de Espana nuestro Senor. — ‘Flistoriadores primit. de las Indias por Barcia, Madrid, 1749.

Eefiere las minas de cobre, fierro y azufre que encontrb, la artilleria que fundib y los pesos que acunO.

334a. Cortes, Hernando* The Dispatches of Hernando Cortez, the Con- queror of Mexico, addressed to the Emperor Charles V. ; written during the Conquest, and containing a NTarrative of its Events. New York, 1843. Wiley & Putnam.

335. Cortina Harrio, Manuel* Libre exportacibn de la plata. — Prop.

Ind. 1875. Ntim. 22.

336. Cosio, Jose "V* Mineral de Sultepec . — JOiario del Imp. Num. 440

(1866 ). — Min Mex.J.j 1873, num. 1.

337. Cotta, Carlos de. La Mineria en Colima. — Min. Mex. VII, 1880-

81, ntim. 28.

340. COTarrtiljias, Oaspar de* Belacibn de la comaxca y minas de

Temasealtepec liecha en 1579 por D Extractada por el Sr. Inge- niero de minas D. Manuel de la Puente y Olea. — Mem. Soc. AlzatCj III, 1890-91, pp. 203-214.

341. Cowles, Fugfene II* Los minerales del aluminio. — Min. Mex.

XVIII, 1891, ufimero 9.

342. Cox, TO* The discovery of oxide of antimony in extensive lodes

in Sonora, Mexico. — Am. J. of Sc. 3d. ser. XX, 1880 (2), p. 421-423. — Proe. Am. yis-wc. XXIX, 1880 (Boston), pp. 343 & 344.

345. Crespo j Martinea,. €vlllerto, Ingeniero de minas. Informe sobre los criaderos argentiferos y platiniferos de Santa Marla de los Alamos. (Jacala, E. de Hidalgo). — Min.Mex. Ill, 1875, nCims. 16. vox.. XXXII. — 37

624 Bibliography Of Mexican Geology And Mining.

346. El verdadero caracter de nuestra industria minera. — Min. Mex. XIV,

1887, ntims. 12 y 14.

347. Un nuevo metodo de beneficio, — Min. Mex. XIV, 1887, num. 17.

348. Cross, Wllitmaii. Igneous Eocks from the Coal and Iron Eegions

of Coahuila and Nuevo Leon, Mexico, Collected by E. T. Hill. — Am. J. Sc. 3d. ser. XLV. 1893, pp. 119-120.

349. Cruz, Atiratiam. El apartado del oro y de la plata. — BoL Soc. G.

Ing. I, 3888-89, pp. 86-98.

350. Cliataparo, Juan K., Ingeniero de minas. El Mineral de Zacual-

pam. — Min. Mex. II, 1874, num. 10.

351. Eldesagiie de Valenciana. — Min. Mex. II, 1874, num. 11.

352. Guanajuato. Generalidades sobre los progresos y dificultades de su

Mineria. — Min. Mex. II, 1875, ntimero 21.

353. Ligera resena sobre el estado de algunas minas del primer Distrito

minero de Guanajuato. — Min. Mex. II, 1875, nums. 24 y 25.

356. Ligera exposicion geologica relativa al Valle de Mexico, leida en

la Sociedad de Historia Natural. — Min. Mex. II, 1875, ntimero 30.

359. El porvenir de la Mineria en Mexico. — Min. Mex. Ill, 1876, ntimero 28.

360. Progresos geol6gicos en Mexico. — Min. Mex. Ill, 1876, nfim. 29.

361. Progresos Mineros. Las perforadoras en el Mineral del Monte.

Otras mejoras. — Min. Mex. HI, 1876, ntim. 33.

363. La libre exportacion del oro y la plata y el Estado de Guanajuato. —

Min. Mex. IV, 1877, ntim. 29.

364. Descripcidn general de herramientas. Ntimero de utiles que necesita

una mina segtin la escala de sus trabajos (1865). — Min. Mex. IX, 1882, ntim. 2.

365. y Ramirej, SantiagfO Ingenieros de minas. Descripcibn de

un mamlfero f6sil de especie desconocida perteneciente al genero ‘‘Glyp- todon’’ encontrado entre las capas posterciarias de Tequisquiac en el Distrito de Zumpango. — Bol. Soc. Geog. dpoca, II, 1874-75, pp. 354-

362. 1 him.

366. Memoria para la Carta Geolbgica del Distrito de Zumpango de la

Laguna. — Toluca, 1875, IV-56 p. 4?

En el t. IX del Min. Mex. hay un estracto de la geologla de Zum- pango.

367. Cuellar, Jose de. El hierro y el carbbn.— A/m. Alex. VII,

1881, ntims. 40 y 41.

368. Cuevas, Cic. Jose !M[aria. Informe que hizo ante la

Exma. Tercera Sala de la Suprema Corte de Justicia, en el negocio de la Mina de la Luz, sobre el punto de conveniencia. — Mdxico, Imp. de J. M. Lara, 1852. 106 p.

368a. Cuevas, Xuis. La Mina de la Prieta (Santiago Papasquiaro, Du- rango).— A/m. Alex. XXX, ntim. 8 (25 Feb. 1897).

369a. Cumengfe, Sur le gite cuprifere d’Inguaran, 3tat de Michoacan, M.exiqae.— Bull. Soc. Fr. Min. XXI, 1898, pp. 137-142.— Eer. Soc. Abate, 1897-98, pp. 84-86.

370. Cliance, H. M. Geological notes on Mexican Central Eailroad. —

Alacfarlans Geol. Bailway Guide. 2d. ed. 1890, p. 418.

371. Cliatidler* Ensaye del petrbleo. .(Extractado y traducido de la Me-

moria de Mr , por S. M4ndez).— Mm. Soc. Ilunholdt. II, 1873, pp.

Bibliogeaphy Of Mexican Geology And Mining. 625

373. dia-lifreati, Jtian, Ingeniero de minas. Infonne qiie rinde el Inge-

niero de minas al Sr. Lie. de Pedro Bustamante, sobre la zona

minera de San Jose, Municipalidad de San Carlos, Distrito del Centro, Tamaulipas. — Mem, del Gob. del E. de Tamaidipcis. 1889, p. 199-207.

374. diarletotl, Niquel, sus usos y distribucibn. — Min. Mex.

XXV, 1894, numero 10.

376. CIiaveiK? J. Noticia de la antigiia mina tradicionalmente cono-

cida con el nombre de Miguel de Huagino,” Distrito minero de Cosala, Sinaloa, y su liallazgo. — Min. Mex. VI, num. 34.

377. Clievalier, Mig'uel* Memoria sobre la produccion del oro y de

la plata considerada en sus fluctuacidnes. — Bol. Soc. Geog. 2?* e. II, 1870, pp. 290-307 & 317-332.

Contiene una Memoria del Baron de Humboldt con datos de grande interns relatives 4 Mexico, pp. 294-307 & 317-332.

378. diimalpopoca Antado Exposicion sobre el establecimiento

deun Banco deavio para minas de azogue. — Min. Mex. II, 1875, num. 40.

379. El Beneficiador-Chimalpopoca. — Prop. Ind. 1875, num. 27.

380. Informe sobre el Mineral de Coinanja rendido a la Secretaria de Fo-

mento.— Mexico, Imp. de “El Hijo del Trabajo.” 1883. 89 1 Idmina. — Mem.3L F. 1883-85, V, pp. 69-87.

381. Informe sobre el Mineral del Sabinal (Estado de Chihuahua). — Bol. M.

F. X, ntim. 115 (20 Ene. 1886).— 1/m. Mex. XII.

381a. Cliipman. C. Mineral Eesources of Northern Mexico. New York. 1868. Baker & Godwin, printers.

381b. Cliisltollii, Frederic. Note on the Occurrunce of Cobaltiferous Quartz in the State of Jalisco, Mexico. — Eng. Min. Jour. LXXII, No. 17, Oct. 26, 1901, p. 539. (Mina del Mirador, near Ameca).

382. Ricliard K.y Ingeniero de minas. The Vallecillo mines, Mexico. — Trans. Am. Imt. Min. Eng. XIII, 1885, pp. 351-368.

383. Sierra Mojada, Mexico. — Trans. Am. Inst. Min. Eng. XV, 1887, pp.

542-587, 1 mapa. — Min. Mex. XIV, 1887, ntim. 18.

384. The drainage of the valley of Mexico- — Eng. and Min. Jour. XLVI,

pp. 478-480, 500-501 & 522-524.

Da sucintas notas acerca de la geologia del Valle-

384a. Mexican Weights and Measures. — Trans. Am. Inst. Min. Eng. XV, p.

385. The Catorce mining District. — Eng. and 3/m. Jour. XLVIII. 1889, pp.

340-342, 388-389 & 476-478.— 3/m. Mex. XVI, 1890, nums. 6, 7, 8, 9

& 10 .

387. El Distrito Minero de Tasco. — 3/m. 3fat% XVI, 1890, ntims. 11 & 13.

3S8. El Beneficio continue de “Boss” en Pachuca. — 3/m. Mex. XVII,

1890, ndm. 25.

389. Apuntes sobre algunos beneficios modernos y sus aplicaciones. — Min.

Mex. XVIII, 1891.

389a. The Patio Process in San Dimas, Mexico. — Trans. A 771 . Inst Min. Eng.

XI, p. 61.

389h. The New Mining Code of Mexico. — Trans. Am. Inst. Min. Eng. XIV,

p. 34.

392. Dalilgfreii) Cliarles B., Ingeniero inecdnico y de minas. Minas histbricas de la Reptiblica Mexicana. Eevista de las minas descubiertas en los tres tiltimos siglos. — Traducidadel inglbs por orden delaSociedad Mexicana de Minerla, en 1884. — Mexico, Imp. Secretaria de Pomento,

626 Bibliogeaphy Of Mexican Geology And Mining.

393. Baliox, Edouard. De la propriete des* mines et de son organisa- tion legale en France et en Belgique. Guide theorique et pratique du legistOj de Fiiigenieur et de I’exploitantj suivi des reclierclies sur la richesse

mindrale et la legislation miniere des principales nations ; par avocat

avec la collaboration de M. Ant. Gouiffes, docteur en droit, &. Paris, 1862. E. Thunot et C® 89 2 t.

Considerations generales sur P exploitations des mines de metaux pi e- cieux dans le Nouveau Monde, t. II, p. 769. De la production des mines du Mexique, t. II, p. 776. De la legislation miniere du Mexique et du Perou, t. II, p. 791.

397. 30am. our Sur un albatre calcaire provenant du Mexique. C. M.

LXXXIJ, 1876, ler sem. p. 1085 & 1086.

Se refiere 4 una muestra del 6mx de Tecali (Puebla).

399. Haua, James 30. Note on the Azoic age and metamorphic origin of the iron-ores of Mexico described by N. S. Manross. — Am. J. Sc. 2d. ser. XXXIX, 1865, pp. 358.

401. 3®arton, Xelson IHoratio. Eecord of North American Geology

for 1887 to 1889 inclusive.— Eid/. U. S. Geol Sw'vey. No. 75, 1891, 173 p.

Cita estudios de Chism, Felix, Goodfellow, Hill, Lindgren, Newberry, von Bath, Wendt y White, relatives a la Reptiblica Mexicana. V4anse dichos autores.

402. Record of North American Geology for 1S90.— Bull. U, S. Geol Shir-

vey. No. 91,1891. 88 p.

Cita trabajos acerca de Mdxico por Castillo, Chance, Frazer, Heilprin, Janin, Lindgren, Macfarlane y White.

403. Eecord of North American Geology for 1891. 77. S. Geol 6%r-

No. 99, 1892, 73 p.

Acerca de Mdxico anota trabajos de Hausmann, Heilprin y White.

404. Catalogue and index of contributions to North American Geology.

1732~1891.—Rw/Z. U, S. Geol Survey. No. 127, 1896, 1045 p.

410. Jftay, David T. Mineral Resources of the United States.— 77 S,

Geological Survey. Washington. 89 1886-1893.

Mexico (imports from) 1886: silver, p. 106.— 1887: copper, 87 ; im- ports of argentiferous lead-ores, 98 j lead contained in silver-ores, 99 ; lead-ore, 100 ; silver bullion, 62; ores, 62; Mexican Onyx, 563.— 1888 : amber, 583 ; copper production, 73 ; lead, 79-80. — 1891 : copper ; ex- ports to Liverpool, 101 & 102.— 1892 : copper, 114.— 1893 : copper, 86; lead, 99.

411. Departamento del Interior. InspecciOn Geol6gica de los Estados

Unidos. Director J. W. Powell. — Productos minerales de los Estados XJnidos del Norte. Ailos de 1880 a 1890 . — Bol Ayr. AUa. JuL 1892. 1 gran cuadro frente i la p. 180.

412. Dean 9 Uso de aparatos elctricos en la minerfa. — Min. Mex.

XXYII, 1895, nfims. 14 & 15.

412a. DelCalb, Courtenay. Mirmoles-Onix. — Min, XXVII,

1895, . 11 and 12.

413. Delaeour. Aperpu sur Petat LygiTfnique et pathologique des mines

argentifres du Mexique. — 0. B. XXIII, 1846, 2g semestre, p. 674-675,

De Eauuay. See Fuchs.

415. Demiisoii, La Mineria en Coahuila.— i/m. Mex. XXVIII,,

1896, nUm. 2.

Biblioguapht Of Mexican Geology And Mining. 627

41S. Quille, La formaci6n de criaderos metaliferos. — Min. Mex. XXIII, 1893, niim. 22.

419. Como se encuentra el oro. — Min. Mex. XXIII. 1893, nums. 23 & 24.

420. IDes Cloiateaux, A# Xota sobre la forma cristalina y propiedades

Opticas de la Durangita . — Nat lY, 1877-79, pp. 44-47.

420a. ie la Calle* Memoria relatiya 4 Pachuca, dirigida a, Felipe

lY. — Madrid, 1646. (?1

421. Iliasc, Allertci. Conipania Explotadora de Criaderos Carboniferos

en Michoacan de Ocampo. Informes, documentos interesantes, certifi- caciones, sentencias, pianos, etc., etc., compilados por — Mex-

ico, Imp. “El Liberal,” 1882, 89 35 p.

421a. Uiaa, Hernal* The Memoirs of the Conquistador Bernal Diaz del Castillo, written by himself, containing a true and full account of the Discovery and Conquest of Mexico and Xew Spain. 2 vols. London. 1844. J. Hatchard <fe Son.

422. Barreiro, Juan Manuel. Diccionario de Mineria

de la Eepublica Mexicana, 6 sea compilaciOn de todas las disposiciones legislativas y reglamentarias vigentes en asuntos de Mineria, y de todas las circnlares y aclaraciones dictadas hasta la feclia de esta publicaciOn, puestas todas en riguroso orden alfabetico, 4 insertandose ademas Integra y textualmente todas las disposiciones y circulares indicadas, asi como

otras a qne estas se refieren. Obra escrita por Apoderado del

Ayuntamiento de Mexico. Edicion del Boletin Judicial. — Mexico, Imp. y Lit. Corchero nilm. 2. 1894. 89 329 p.

423. Barrigfa, Br. Placido. Estudio sobre la tisis y acci6n que en ella ejercen las aguas termo-minerales de Puebla. — “El Estudio” {SoQ.Mecl Farm, de Puebla), 1,1875, pp. 7-11, 32-39, 79-82, 109-112, 175- 177 & 372-375.

424. Biaa Ouerra, Jose ; Parres, I.,uis y Anda, Pedro de.

Informes de la mina deSan Jose de Esperanza, iibicadaenlaYetaMadre, junto it Yalenciana. — Mexico, Imp. M. F. Redondas, 1851, 89 8 p.

424a. Biellenliacli, BC. M. Gran Fundicion Nacional Mexicana de Mon- terrey, Nuevo Leon. Trabajos ejecutados durante el auo fiscal de 1896 4 1897.— Ro/. Agv. Min. Oct. 1897* pp. 44-50.

429. BollfFus, Augruste, et Montserrat, P. de. Etude sur le

district de Sultepec. — Arch. Comm. Sc. Me.nque, III, Paris, 1867, pp. 471- 496, 3 pi.

430. Excursion al Nevado de Toluca. (Die. 1865). — Nat. YI, 1882-84, pp.

27-31. 1 lam.

432. BolllFus, A. 5 Montserrat, K., et Pairie, P. Observations gologiques faites dans le trajet de la Yeracruz Ti Mexico. — Arch. Comm. Sc. Mexiqiie. II, 1867, pp. 124-127.

Contiene la lamina : Coupe geologique de la route de la Vera- Cruz d Mexico, mivant le dveloppement de la Ugie hrhee pas<ant par Puebla et

435. Mmoires et Notes Gologiques. — Arch. Comm. Sc. Mexique. II, 1867, p. 363-403. 8 Pirns.

Se ocupan de los cortes geoldgicos de Naolinco d Huatusco, de Perote d Tehuaedn, de Tehuacdn d Puebla y de los cortes paralelos transversales d la cordillera ; de la carta geolbgica del distrito minero de Zomela- huaedn, y cle las aguas minerales de los alrededores de Puebla.

437. Bomingfueaj, Xorlierto. La famosa mina de “ElTajo” (Hidal- go del Parral, Chihuahua). — Mm. Mex. XXYI, 1895, nfimero 12.

628 Bibliography Of Mexican Geology And Mining.

438. Bonald, J. F. El Asbesto — Mer. XX Y, 1894, num. 12.

438a. ]>6rig:a, Arturo IL La Negociacion Minera de Cantabria Fopia Estado de Durango- — 3/ni. Mer. XXXV, num. 12 (21 Sept. 1899).

439. Houglas, James. Mejoras recientes en la Metalurgia americana.

Discurso lefdo ante la Sociedad de Artes de Londres — JMin. 3/er. XXVI, 1895, num. 22,

439a. The Xacosari (Sonora) Gas-Producer Plant. — Enq. Min. Jour.

LXXIII, No. 20, May 17, 1902, p. 687.

440. 111(13085 It.Offer 5 Vice-consul de France h Chihuahua, correspondant

de la Commission Scientifique. Notice sur les productions et les mines de TEtat de Chihuahua. — Arch. Comm. Sc. Mexigue. I, 1865, pp. 183-189.

441. Huclos Sali3iaS5 A. Importancia minera de Nuevo Leon. — 3/m.

3/e.i. XXVII, 1895, num. 4.

445. I>uilll 3 le 5 F. X. Cretaceous of Western Texas and Coahuila, Mexico. —Bull. Geol SoG. Am. VI, 1885, pp. 375-388.

445a. Notes on the Geology of Sonora, Mexico. — Jh'ans, Am. Inst. Min.

Eng. vol. XXIX, p. 122-152.

445b. Natural Coke of Santa Clara Coal-Field, Sonora, Mexico. — Trans.

Am. Inst. Min. Eng. vol. XXIX, pp. 546-549.

445c. Triassic Coal and Coke of Sonora, Mexico. — Bull. Geol Soc. Am. XI,

1900, pp. 10-14.

445d. Cretaceous of Obispo Canyon, Sonora, Mexico. — Trans. Texas Ac. ScL

IV, 1901, p. 81.

445e. Occurrence of Oyster-Shells in Volcanic Deposits of Sonora, Mexico. —

Trans. Texas Ac. ScL IV, 1901, p. 82.

445f. El Valle de Guaymas (Versidn castellana por G. J. Gonzalez). — 3/m.

Mex. XXXVIII, ndm, 13 (28 Mar. 1901).

445g. Notes on the Geology of Northern Sonora. — Trans. Am. Inst. Min. Eng.

XXIX, p. 122.

446a. I>urat 5 F. A. Los pozos artesianos de Le6n, Guanajuato. — 3/m. 3/e.i', XXXIV, num. 19 (11 Mayo 1899).

447. £atoil 5 Amos. The Gold of Mexico in a Kock, Equivalent to that which Contains the Gold of the Carolinas. — Am. J. Sc. 1831, XX, p. 124.

450. FdmonS 5 F. On Specimens of Obsidian from the Mountain of Beal

del Monte, Mexico. — Proc. Geol Soc. London. II, (1835?), p. 686. — Phil, Mag. 3 d. ser. XIII, p. 387.

451. FsflolFsteiii, Baron F. VIT. von. Contributions to the Geology

and Physical Geography of Mexico, New York, Appleton and Co., 1864.

456. FiSSen, Oustav. Explorations in the Cape region of Lower California

in 1894.— Proc. Cal Ac. Sc. 2 d s. V, 1895, pp. 7SZ-776, 5 hims.

Habla brevemente de la constitiicion geologica y accompafia un pequeflo mapa geol6gico por G. Eissen y F. H. Vaslit.

456a. Explorations in the Cape Region of Lower California, made under the

auspices of the California Academy of Sciences. — Bull Am. Geogr. Soc. XXIX, 1897, No. 3, pp. 271-280, 1 map.

456b. Explorations in the central part of Lower California. — Bull Am. Geogr.

Soc. XXXII, 1900, No. 5, pp. 397-429, 1 map.

457. Fltiuyar 5 Fansto d[e 5 Director General de Minerfa en Nueva

Espaiia, etc. Estado de las minas de Somorrostro. — Extracio de las Juntas gen. de la Beal Soc. Bascongada, 1783, pp. 97-113.

458. Proyecto de una colecciOn de minas del pafs. — Bxtractos, etc. 1783, pp.

BIBLIORAPHY OF|[jIEXrCAN GEOLOGY AND MINING. 629

459. Copia de una carta escrita desde Schemnitz en CJiigria, sobre el nuevo

metodo de beneficiar los metales preciosos por amalgamacion, por

Director general del Eeal Cuerpo de Mineria de Nneva Espana, al Dr. D. Casimiro G6mez de Ortega. — Memorial lit. etc. de la Corte de Madrid. XI, 1787, pp. G4-66.

400. Minas de cobre. Modo practico de beneficiarlas con mas economia. —

Ertr. Soe. Bascongada. 1787, pp. 69-86.

461. Diferentes metodos de trabajar el hierro en algunas ferrerias extran-

jeras. — EUrac. Soc. BaBcongada. 1787, pp. 86-91.

462. Discurso sobre la importancia y subsistencia del Eeal Cuerpo de la

Mineria en Xueva Espana. — Mexico, 1815, fol.

468. Jorenzo* El taladro de diamante. — Min. 2Iex. I, 1873- 74, nums. 10-11.

469. Los negocios de minas. — Min. Mex. I, num. 12.

470. La Mineria y los derechos de portazgo. — Min. Mex. I, ndm. 14.

471. La mina ‘‘No Pensada” (Mineral de Asientos, Aguascalientes). —

Min. Mex. I, num. 15.

472. Elsesser, X. Estudio sobre la concentracion de los metales de plata

en Mexico. — 3Iin. Mex. VI, 1878-79, ntimero 31.

472a. EmmonS) ad, X, The value of ores in Mexico.— -Ewp. Min. Jour. LXXII, No. 22, Nov. 30, 1901, pp. 716-717.

474. Hmory, Col William M. General Description of the Country

Adjacent to the Boundary Between the United States and Mexico. — Proc. Am. Assoc. 1857, (Albany), X, part. 2, pp. 134-148.

475 . Physical and Geological Description of the Country from the Initial

Point on the Pacific to the Junction of the Gila and the Colorado. — Eep. TJ. S. Mexican Boundary Survey I, 1857, part. 2. pp. 78-92.

478a. Ertie Kederico* Algunas minas y placeres de oro en el Sureste de Sonora, limitrofe con el Estado de Sinaloa, y otras adyacentes al Noroeste de Sinaloa. — Min. Mex. XXXIII, ntim. 14 (6 Oct. 1898).

479. Hscatidon, L<uis Elementos de riqueza del Estado de Hidalgo.

— Min. Mex. XXI, 1892, num. 4.

480. El carbbn de piedra en el Estado de Hidalgo. — Min. Mex. XXIII,

1893, num. 15.

481. Elscudero, Jesiis F. de. El Partido de Mapimf, Durango. —

Min. Mex. XXIV, 1894, ntimero 22.

481a. La mineria en el Estado de Durango. — Bol. Agr. Min. Abril 1897, pp.

481b. La mineria en el Partido de Mapimi, Durango. — Min. Mex. XXXI,

nilm. 6 (5 Ag. 1897), XXXIV, XXXV (1899) A XXXVIII, ndm, 5 (1901).

483. HspeJOy Pedro, Ingeniero. Informe sobre la zona minera ‘La

Casualidad y anexas” del Partido de Ojocaliente, Zacatecas. — Bol. Agr. Min. Jul. 1891, pp. 110-130.

483a. Kstars, Duralis. C41ebres bonanzas mineras. Defensa,’ Monterrey, N. L. — Min. Mex. ntim. 19 (9 Mayo 1901).

484. Ktragfnat, P. La Sierra del Estado de Puebla. Apuntes geognosti-

cos, mineralbgicos y metaltirgicos. — Min. Mex. II, 1874-75, ntims. 31-35.

485. Paliry, Jose Antonio. Compendiosa demostracibn deloscrecidos

adelantamientos, que pudiera lograr la Beal Hacienda de Su Magestad mediante la rebaja en el precio del azogue, que se consume para el laborio de las Minas de este Beyno, 6 del aumento tan considerable, que

630 BIBLIOaRAPHT OF MEXICAl' G-EOLOGY AXD MINING.

se avia de experimentar en el producto anual de sus Eeales Eentas, en beneficio no menos grande, que universal de esta Mineria, de ambos Co- mercios, y por consiguiente de todo el comun de la Republica. Impressa en Mexico con licencia del Superior Grobierno. For la Viuda de D. Joseph Bernardo de Hogal. Afio de 1743.

491. Iarring-tOM, Oliver Ctmtmiiig-S. Handbook and Catalogue

of the Meteorite Collection. — Qeol. series, Vol. I, num. 1, Field Columbian Mitsemu Chicago. August 1895. 8? 65 p. VI pi.

Se ocupa de varies meteorites de Mexico y establece su clasificacion. 491a. The Eruptive Eocks of Mexico. — Jour. Qeol. Vol. V, pp. 467-468, 1897.

492. Expedicion Cientifica al Popocatepetl. Jose G. Aguilera y Ezequiei

Orddnez, (Eeview).— /owr. of Qeol. Chicago. IV, 1896, pp. 516-520.

492a. Observations on Popocatepetl and Ixtaccihnatl, with a review of the

geographic and geologic features of the mountains [Mexico]. — Field Col. Mm. Qeol Vol. I, pp. 75-120, 1897.

493. Karrugfia Manly, Pederico. Apuntes sobre el empleo del

sulfate de cobre y del magistral para el beneficio de patio y sus costos relatives. — Min. Mex. I, 1873-74, num. 34.

494. Ferreria nombrada la Encarnacion ” en el Estado de Hidalgo. — Min.

Mex. II, 1874-75, ndmero 4.

496. Grafita 6 plorabagina descubierta en el mineral de Zimapan. — Prop.

Ind. 1875-76. Num. 4.

497. Apuntes sobre el reconocimiento efectuado en los placeres de Plom-

bagina, situados en el Distrito de Molango, Eslado de Flidalgo. — Prop. Ind. 1875-76. Numero 8, pp. 88-91.

499. Mineralogia aplicada. Memoria sobre la metalurgia prilctica del plomo

y de la plata eri el Distrito de Minas de Zimapan. — Nat. II, 1871-73, pp. 178-187, 222-233, 323-336 y 375-387. 2 cuadros y 2 lams.— Prop. Ind. 1875-76. Nums 23, 24, 25, 26 & 27.

500. Kecliet, Eugene O. The Mines of Sierra Mojada, Mexico. — Enp.

Mm. Jour. LV, 1893, pp. 151-152.

500a. F'elix, Carlos P. El Mineral de Cerro Colorado, Chiliuahiia. — Min. Mex. XXXI, num, 18 (28 Oct, 1897).

5Q2. und Cenk, Hr. Hans* Beitriige zur Geologic und Faliiotologie

der Eepublik Mexiko. — Theil I & II, (1 heft). Leipzig, 1890 & 1893. Theil III, Stuttgart, 1891. 4.' Mit. taf. etc.

502a. Uebersicht ueber die geologischen Verhiiltnisse dcs mexicanische

Staates Oaxaca —Beitr. z. Qeol. u. Fed. Mexico. II Theil, 1899, pp. 3-38.

506. Penockio, A. Metodo para extraer la plata de sus minerales por el

sistema llamado LixLviacion” segun se practica on Sonora. — Bol. Soe. Qeog. 6p. I, 1873, p. 437-446.— Prop. Ind. Nhin. 5, pp. 53-56.— ilJm. Mex. I, . 31 y 32.

507. Penockio, Apuntamientos acerca del Mineral de Teojoniiilco,

Estado de Oaxaca. — Mem. M. F. 1883-85, V, pp. 94-98.

508. Penocliio, Juan* El carbon mineral. — Min. Mex. IX, 1882-83,

nhm. 13.

Se ocupa de anMisis de lignita de Tlacolulam, Cant6n de Jalapa, Veracruz.

510. Informe referente 4 lamina “El Sacramento,” Distrito de Izdcar de

Matamoros. — Mem. M. F. 1883-85, V, pp. 87-93.

511. Informe acerca del Mineral de Zomelahuacan presentado d la Secre-

taria de Fomento. — Mexico, Imp. Sria. de Fomento. 1883. 89 64 p. — Mem. M. F. 1883-85, Y, pp. 147-177. -il/m. Mex. X.

BIBLIOGEAPHT OF MEXICAN aEOLOOY AND MINING-. 631

512. Kergusson, Artliiir 'W. Alexico. — (Bureau of the American Ke- publics, 'Washington, U. S. A. — Bulletin No. 9, July, 1891). 89 347 pp. lami & 1 mapa.

Chapter TI. Mines and Mining, pp. 61-77 ; Ch. VII, Coal, Asphaltum, and Petroleum-Deposits, pp. 78-83.

514. Iemandleic? Carlos. Sombrerete y sus minas. — Min. Mei. XXI,

1892, ntim. 21.

515. Chalchihuites. — Min. Mex. XXII, 1893, nums. 15-17.

515a. KemaiKleis:, KLOtoerto. The Patio Process in Guanajuato, Mexico. — Trans. Am. Inst. 21m. Eng. XXIX, 1899, pp. 116-121. — 2Iin. 2fei. XXXV, num. 8 (24 Ag. 1899).

515c. Le Precede du ‘Patio” pour le traitement des minerals d’ argent. —

MexiquCj’ II, num. 6 (Sept. 20, 1899).

519. Kernaiidea, "Vicente. El cloruro de platina en la natnraleza, des-

cubierto por — 2Iin. 2Iex. I, 1873-74, num. 33.

520. Practica del beneficio de minerales de plata auriferos usados en el Dis-

trito de Guanajuato llamado de patio, conteniendo algunas teorias con las que se procura explicar cientificamente los fenOmenos quimicos en que esta fundada. — 48 pp. y 1 lam. — La Nat. lY, 1877-79, (Apdndice). — Bol. 21. F. II, . 54-59 (Abril 1878) y III, . 58-62 (Nov. 1878.) — Min. 2Iex. VI, nums. 6, 7, 8, 9, 10, 11 y 13. (Eepetido en el t. VIII).

524. y Severe. El Seleriuro de plata aurifero en los frutos

del Nayal (Guanajuato). — La Republica. Periodico oficial del Estado de Guanajuato. Nilmero 68 (Octubre 8, 1874). — 2Iin. 3Iex. II, num. 28. 524a. F'inlay, O. I. A new occurrence of nepheline syenite and associated dikes in the State of Tamaulipas, Mexico, with a review of the distribu- tion of these rocks in North America. — Abstract, Science, XII, 1900, pp.

528. Kiol, Juan. Negociacion Minera ‘San Aparicio’ yanexas. (Ojoca-

liente, Zacatecas). — 2Iin. 2Iex. XXV, 1894, ndm. 7.

529. Negociacion Minera La Estrella y anexas (Ojocaliente, Zacatecas).

— 2fin. 2Iex. XXV, ntimero 21.

530. Informe sobre las pertenencias mineras de la NegociaciOn ‘LaMon-

taileza y anexas” (Ojocaliente, Zacatecas). — 2Im. 2Iex. XXVI, 1895, ntim. 11.

530a. Kislc, Wintlirop Mining Notes from Sinaloa, Mexico.-— Ar/. Min. Jour. LXXII, No. 4, JuL 27, 1901, p. 109.

532. IPleury, Caron die. Notas Geologicas y Estadisticas sobre Sonora y

la Baja California. — Bol. Soe. Geog. e. I, 1869, pp. 44-52 y 112-118.

533. Klenry, Juan, Ingeniero Inspector de Minas. Informe de la zona

minera concedida a los Sres. Mariano Garcia y socios, en el Distrito de Sultepec, Estado de Mdxico. — Bol Apr. Min. Die. 1892, pp. 232- 257. — 2Iin. 2Iex. XXV, 1894, niim. 26.

534. Informe relative 4 los trabajos ejecutados en la NegeciaciOn Minera de

la Sauceda, Municipalidad de Veta Grande, Zacatecas. — Bol. xigr. 2Iin. Ag. 1895, pp. 103-109.

,534a. Hundimiento de Mina Yieja” en el Mineral de Santa Eulalia,

Chihuahua. — Bol. Agr. Alin. Ene. 1897, pp. 64-80.

534h. Incendio de la Mina ‘‘SanAmaro,” Sombrerete, Zacatecas. — BoL

Agr. 2Im. Feb. & Mar. 1897, pp. 115-135 & 94r-108.

534c. Produccibn de plomo y minerales de zinc en la Kepbiblica Mexicana.

-~~Bol. Agr. Min. Feb. 1899, pp. 108-111.

632 Bibliogeaphy Of Mexican Geology And Mining.

534d. La region estanifera de las Sierras de Santa Isabel, Cacaria, etc.,

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538. F'og'll, Carl S. Some geological features of tlie mine of Yelardena

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539. KoIIettete, Iugfenio, Ingeniero de minas. Informe de la Xego-

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543c. La zona de oro de Copalqum, Durango. — Notas suplementarias. —

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543d. Mining-Camps near Topia, Durango. — Eng. Alin. Jour. LXXI, Xos.

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885. Informe sobre la regibn aurifera de Santa Clara, Distrito NTorte de la

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— Proc. Cal. Acad, of Sc. 2d. series. III, 1891, pp. 25-33.

930a. Bongega, Arturo. Un grupo de minas de la Mesa de Santiago,’’ Municipalidad de Santa Barbara, Parral, Chihuahua. — Min. Mex. XXXVIII, ntimeros 2-4 (10, 17 & 24 Ene. 1901).

931a. Bongridge, O. C. Mdxico y su oro. — Min. Mex. XXX, ntim. 5 (4 Feb. 1897).

932a. BopeZy Bucio R. El Mineral del Carmen, Coahuila. — 3fin. Mex., ntim. 3 (18 Ene. 1900).

935. Iopez Mouroy, Pedro, Ingeniero de minas. Mineria. Beneficia

de los minerales argentiferos en Noria de Angeles, Estado de Zacatecas. — El Semanario Ilustrado, T, 1868, ntims. 6, 7, 8, 14, 15, 16, 18, 21, 22, 23 y 24.

936. Observaciones sobre una presunta especie mineral nueva, nativa de

Mexico. — Nat. I, 3869-70, pp- 76-78.

937. Observaciones sobre algunos combustibles minerales de Mdxico. — Nat.

I, pp 87-94. — Jfm. Mex I, ntim. 36.

940. Mineral de Catorce. — Min. Mex. I, 1873-74, ntims. 29 y 30.

941. Ejemplar argentifero procedente del Mineral de Catorce. — Min. Mex.

I, 1873-74, ntim. 32.

64$ BIBLIOaRAPHY OP MEXICAN aEOLOGY AND MINING.

943. Informe sobre las maquinas de barrenar presentado a la Junta Direc-

tiva de la Compama Minera Uni6n Catorcena’’ del Mineral de Catorce. — Mexico, F.Diaz de Le6n, 1878 8? 43 p — Min. Mex VI, nums 6 a 13. (Eeimpreso tambin en el t. VII, ntimeros 1, 2, 3, 4 y 5).

944 Exploraciones geol6gicas — Min Mex V'l, 1878-79, num 5.

945. Informe relative alas minas “Buen Suceso” y “Cburruca” (Pinos,

Zacatecas) y a la cata del Kef agio (Venado, San Luis Potosi) — Min Mex VI, ntimeros 41 y 42.

947. Informe sobre la Mina de Churruca en el Estado de San Luis Potosi.

— Min. Mex. VII, numero 34.

948. Las Minas de Guanajuato. Memoria histbrico-descriptiva de este

distrito minero escrita por dispnsicibn de la Secretaria de Fomento. 1888. 8? 677 p. y 1 cuadro. — dws M. F. X, pp. 68-730.

949. Informe pericial sobre la Compania Minera de Nuestra Senora, Sinaloa.

1892. (?)

949a. Apuntes histbricos relatives al descubrimiento de las Minas de Guana-

juato — Min. Mex. XXXIV, ntimeros 7-12 (Feb. and Mar. 1899).

949b. La explotacibn de las Minas argentfferas mexicanas . — Min Mex.

XXXIV, ntimeros 20-26 (Mayo <fe Jun ) & XXXV, ntimeros 1 d: 2 ( Jul. 1899).

950. lAc* Pedro La Mina Buena Fe.’* Informe en derecho, pronunciado per ante la Primera Sala de la Suprema Corte de Justicia. — Mexico, 1845. Imp. deJ.-K Barbedillo 129 53 p

951a. lyOwry, J. D. Mining in Lower California — Fng. Mm. Jour. LXXI, No. 15, Oct. 12, 1901. — Min. 3Tex. XXXIX, ntimeros 19 <fe 20 (7 & 14, Nov. 1901).

952a..IvOya, El Mineral de Guanacevi, Durango. — Min. Mex. XXXI, ntim. 4 (22 Jul. 1897).

953a IbudloW) Edwin. Las Esperanzas Coal Mines, Coaliuila . — Eng 3Un. Jour. LXXI, No. 11, March 16, 1901

955. lytigfO) PeodomirOj Ingeniero de minas Las pintas minerales de las vetas en los Distritos de minas de Pachuca, Real del Monte y Mineral del Chico. — Pachuca, Of. tip. del Gobierno del Estado, 1888 8? 18 p.

955a. IbukiSy IE* de A New Copper-Deposit in Puebla, Mexico. — Eng. 3Iin Jour. Vol. LXV, pp. 279-280, 1898

956a. Eryotlf C. Journal of a Residence and Tour in the Republic of Mex- ico in the Year 1826, With Some Remarks on the Mines. — -London, 1828, 89 2 vol.

960. mac Carttiy, H. X# La Mina de Santa Fd, Estado de Chiapas. — Jfi’a. Jler. XXVIII, 1896, nums- 20 & 21.

961a. Ulcllowelly P. H. American Mining Machinery in Mexico and Cen- tral America. iB'ans. Am. Imt. Min. Eng . , XIII, p. 408.

961b. mcOee, W. J. Sheet-flood erosion.- Geo. Soc. Am. Bull Vol. VIII, pp. 87-112, 1897.

962. mackintosli, Oiiillermo* Minerfa. El Mineral de Guadalupe de los Reyes conocido por la cblebre mina de la “ Estaca” en el Estado de Oaxaca — Bol. Soc. Geog. I, 1869, 2'’ e pp 540-552.

964. fUaclure W. Some Geologic features of a part of Mexico. — Am. J. Sc XVI, 1829, pp 159-161.

Geological Remarks relating to Mexico, etc. — Am. J. of Sc. XX, 1831

and 1832, pp. 406-403.

BIBLIOaHAPHY OF MEXICAN GEOLO&Y AND MINING. 647

966. Mactear, James* Explotaci6n y metalurgia del mercurio en Mex- ico. — Min. Me). XXYIII, 3896, nums. 8, 9 & 10 ; XXIX, nilm. 7.

967. Maifei, Kugfenie, y Rua Figueroa, Ramon, Ingenieros del Cuerpo de Minas. Apuntes para Tina Biblioteca Espanola de libros, folletos y articulos, impresos y manuscritos, relativos al conocimiento y explotaciOn de las riquezas minerales y i las ciencias auxiiiares. Com- prenden la Mineralogia y Geologia en todas sus aplicaciones ; la Hidro- geologia, la Quimica analitica, docimastica y metaltirgica ; la Legislacidn y Estadistica mineras — Madrid, J. M. Lapuente. 1871. 2 tomos. 89 LXX-529 y 693 p.

968 Mairesse, Carlos* N9 1. Informe sobre las minas de Tlalpujahua, Distrito de Maravatio, Estado de Michoacan — Mexico, Tip. F. Mata,

1880. 8?68p.

Impreso en espaiiol e ingles.

>909 Nums 2 & 3 Eeports of the Two Mining Districts of vSan Baltazar

and Asuncion, Districts of Villa-alta, and Choapan, State of Oaxaca. — Mexico, Tip. F. Mata, 1880. 11 p.

970. Num. 4. Eeport on the Mines of Las Angustias, La Soledad, San

Joaquin, and Annexed, District of Etla, State of Oaxaca, — Mexico, Tip. F. Mata, 1880. 89 7 p.

971 . Ntims. 5 & 6. Beport on the Silver-Mines of Cinco Senores and S Oeronimo,

District of Ixtlan, or Villa-Juarez, State of Oaxaca. — Mexico, Tip. F. Mata, 1880 8V 15 p.

971a. Malcolmson, James* The Sierra Mojada, Coahuila, Mexico, and Its Ore-Deposits. — Eng. Min. Jour. LXXIT, No 22, Nov. 30, 1901.

976. mallet) 'W* Professor in the University of Virginia. Chemical Composition of Guanajuatite, a selenide of bismuth from Guanajuato. — Am. J. of Sc. 3d. ser. XV, 1878 (1), p. 294 —Nat IV, 1877-79, pp. 73-76.— JBol. M. F II, num. 9 (19 Enero 1878), p 36

'978. On Barcenite, a New Antimoniate, from Huitzuco, Mexico. — Ain. J.

Sc. 3d. ser. XVI, 1878 (2), pp. 306-309.— Xa Nat IV, 1877-79, pp. 198- 201. — Bol. 3f. F. Ill, numero 42 (26 Sept. 1878), p. 157. — Min. Mex. VI, nums. 6 y 7.

984. maiicera, Fnrique. Informe acerca de la Negociacion Minera

“ ProtecciOn al trabajo,” Matehuala. — Min. Mex. XXAI, 1895, num. 19.

985. maticera, Xomas* Informe acerca del mineral de Atotonilco el

Qliico.— Bol. Soc. Geog. n e. II, 1850, pp. 187-197.

986. mange) F. Informe de la NegociaciOn de San Luis (E de Chi-

huahua). — Min. Mex. X, 1883-84, nums. 43 y 44.

987. manriquea?) O. La NegociaciOn Minera de Santa Eduwigis, Charcas. — Min. 3Iex. XXV, 1894, niim. 15.

988. manrosS) BJ* S. Notes On the Coal- and Iron-Ore of the State of Guer- rero, Mexico.— Am. J. Sc. 2d. ser. XXXIX, 1865, pp. 309-312 '989. manaianO) Jesus F.) Ingeniero de minas. Informe sobre la explo- racidn de la Zona Minera de Santa Maria del Eio (San Luis Potosi). — Bol Agr. 3Im. Ag. 1893, pp. 91-107.

'990. marcou, Jules. Notes gdologiques sur les frontidres entre le Mex- ique et les Etats-Unis. — Arch. Comm. Sc. Mexique. II, 1867, pp. 74-80. 993a. IHarqueai;) Ramon* La Mina Guadalupe en el predio rustico 11a- mado Aguacaliente, Municipalidad de Chinipas, Distrito de Arteaga, Estado de Chihuahua. — Alin. Mex. XXX, nhm. 18 (6 Mayo 1897).

'994a. marroquin y Rivera) m., y Sancliea;) Fedro C. Mmoire

648 Bibliography Of Mexican Geology Axb Mining.

sur la chaine de Montagnes de I’Ajusco et le captage de ses eaux souter- raines. — 2Ie7n. Soc. Alzate, XV, 1900-1901, pp. 167-187.

994b. Las Minas de Avino, Estado de Durango. — 2Im, 3{ex.

XXXII, niim. 5 (3 Feb. 1898). (Translated from 2Iinfis and 2£inerals.) 995. IHartmea; Baca Eduard-O, Ingeniero de minas. Informe sobre los placeres auriferos de Calamabi (Baja California) — A ns. Alin. Fom. VIII, 1887, pp. 2SQ-Z27. —Bol 2L F, X, ntims 138 a 142 (Abril-Mayo, 1886),

990 Informe sobre los criaderos de carbon de Piedras Negras, Estado de

Coabuila. — BoL Agr. Alin. Oct 1891, pp 93-112.

997. Informe sobre los criaderos metaliferos de las Zonas Mineras llamadas

Minas Viejas,” “Montanas” e “Iguana,” Distrito de Villa Aldama, Estado de Nuevo Le6n. — BoL Agr. Alin. Enero, 1892, pp. 117-130.

997a. Eesena historica de la Legislacibn Minera en Mexico — Mexico, Tip.

Sec. Fomento. 1901. 74 p. — Trans. Am. Inst. Alin. Eng. Vol. XXXIL

997b. y Servin Eaceliroti, R.. Informe sobre las minas de cobre

“El Boleo,” Baja California, en 1896. — An. Alin. Fom XI, 1898, pp. 1-40.

998. Martinej de la 'Torre, Rafael* Alegato de bien probado en

el Juicio promovido por algunos aviados de la minade Jacal central Compama aviadora. — Mexico, 1861. 89 mayor 138 p.

999. Alegato de buena prueba por parte de la Compania aviadora del min-

eral del Monte y Pachuca en el negocio promovido por varios accionistas de la mina del Jacal, — Mexico, 1862. 89 mayor. 49 p.

1000. Copia de las sentencias pronunciadas por D. Manuel Siliceo, D.

Miguel Atristain y D. Hilario Helguero, en el Juicio arbitral que los aviados de la mina del Jacal ban seguido contra la Compania aviadora del mineral del Monte y Pachuca. — Mexico, 1862. 87 mayor. 70 p.

1001. Alegato de bien probado que present el Lie como patrono

de la Compania del Mineral del Monte y Pachuca, en el Juicio promo- vido por el Sr. D. Juan Chynoweth pretendiendo tener derecho it la mina de San Pedro. — Mexico, Imp. Literaria, 27* Sto. Domingo 10, 1867. 8? 131 p.

1001 a. Martinet Oracida, Manuel* Mineria y su Industria. Piigmas de la obra indita “ Los Indies Oaxaquehos y sus Monumentos arqueo- logicos.” — Congr. Bit. Amer. XI, Mexico, 1895 (1897), pp. 426-442.

1002. Martinet: Oracida, M., y Vsqueic, Cosnie R. Cuadro

Estadistico de la Mineiia en el Estado Libre y Soberano de Oaxaca formado por...y dedicado al Sr. Gobernador Constitucional Genei'al Porfirio Diaz Edicidn de la Secretaria de Fomento. — Mexico, Tip. Secretaria de Fomento, 1884

8 grandes estados, 1 p de texto y 2 de portada y dedicatoria.

Martinet;, lllig:uel F.

Vase Noriega, Pedro.

1003. Matlier, William 'W* On the Principles Involved in the Reduc-

tion of Iron- and Silver-Ores, with a Supplementary Notice of Some of the Principal Silver-Mines of Mexico and South America. — Am. J. Sc. 1833, XXIV, pp. 213-237.

1006. Matute, Juan Ignacio* Negociacidn Minera de Palmarejo.

5? Canton de Jalisco. — Guadalajara, Tip. S. Banda. 1878. 8'.' 18 p.

1 Mm. — Ahn. Alex. VII, ntim. 9,

1007. Informe i la Compaiifa Minera de la “ Divina Providencia ” y Minas-

Anexas en los Placeres de Ostula. — Am. AI. F. VIII, 1887, pp. 477-496. 1 piano (1:500 000).

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lOOSa Mayer, Hrantic. Mexico: Aztec, Spanish, and Kepublican. A historical, geographical, political, statistical, and social account of that country. 2 vols. Hartford, 1852 S. Drake A Co This is the most elaborate history of Mexico in the English language.

1008b. Observations on Mexican History and Archaeology. Washington,

1856. In Smithsonian Contributions to Knowledge, Vol. IX.

1009. Maynar, Ceorge 'W., Ingeniero de minas. El procedimiento

Moebius de apartado electrolito en Pinos Altos (Chihuahua).—

Men XXI, 1892, nums. 9 & 10.

1010. Medial, Juan* Apuntes estadfsticos sobre el Distrito de Ario, Es-

tado de Michoacan. — Mem, Soc, Abate. II, 1888-89, pp. 186-232.

1011. Cuadro Sinbptico del Estado de Michoacan de Ocampo. — Mem. Soc.

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1013. Melville, liV. H- Mineralogical notes. Bisrnuthinite from Sinaloa, Mexico — Bull. U. S. Oeol Survey No. 90, 1892, pp 40.

1013a. Mercado, Manuel* Los trabajos de la Compama Minera Aurifera Ibarra,” Baja California. — Bol. Agr. Min. Feb. 1899, pp. 86-107. — Min. Mex. XXXV, numeros 4 & 5 (27 Jul. & 3 Ag. 1899)

1020. Merrill, Oeorgfe P# A new source of Mexican Onyx. — Science,

April 21, 1893, p. 221.

Trata de un yacimiento de la Baja California.

1021. The Onyx Marbles : Their Origin, Composition and Uses, Both Ancient

and Modem. — Rep. U. S. Nat. Museum, 1893 (1895), pp. 541-585, 18 pi.

1022. An Occurrence of Free Gold in Granite — Am. J. Sc. 4th ser. 1, 1 896 ( 1 ),

p. 309-311.

Se refiere ii un granito de Sonora.

1022a. Notes on the Geology and Natural History of the Peninsula of Lower

California —Rep. U. S. Nat. Mus. 1895 (1897), pp. 969-994, ppl. 1-10.

1023. and Kmmons, S. P. Geological Sketch of Lower California. —

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1024a. Mitcliell, Julio. El Distrito de Moctezuma, Estado de Sonora.

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1032. Molera, P. B. Minerales antiguos del Durazno y la Plomosa (So- nora) — Bol. Agr. Min. Mayo, 1893, pp. 163-168.

1034. Montes de Oca, ILic. Oemetrio. Cuestidn sobre el desagiie de la Mina de Valenciana. — Guanajuato, Tip. ii c. de F. M. Conejo, 1869. 8? 36 p.

1034a. Montes de Oca, J. M. Informe del Ingeniero de la Compania Industrial ‘‘PetrOleo Mexicano, S A ” mandado publicar por el Con- sejo de AdministraciOn. — Mexico, Febrero 1901. Tip ‘El Ltlpiz del Aguila,” 12 p.

1043a. Moran, Prancisco. Minas de cobre en el Estado de Aguasca- lientes— m Mex XXXIII, num. 2 (14 Jul. 1898).

1044. Moreno, Aniceto. Noticia general de las minas que ban sido

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1045. Moreno, Antonio, Ingeniero de minas, Beneficio de lexiviacibn.

Apuntes para la historia de la metalurgia en Sonora. — Min. Mex. I, 1873-74, ntim. 48.

1046. Sumario estadistico y descriptive del ramo de Mineria en el Distrito*

de Alamos. — Prop. Bid. 1875-76. Nhmeros 11, 12, 13 & 14.

650 Bibliography Op Mexican Geology And Mining.

IQIg, Siimario estadistico del ramo de miiieria en el Distrito de Hermo-

silio, Sonora. — Prop, Ind. Nums. 33 v 34.

1054. El carb6n en Sonora. — Min. Mei, XX, 1892.

1056. La fundicidn de Sinaloa.— Mex XXII, 1893, nilm 5.

1057 £1 movimiento minero en la Costa del Pacifico.— il/Lh Mex. XXV,

1894, num. 3.

J0.58. La Mineria en Sinaloa. Un nuevo metodo para ensayar plomo.

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1059 La Mineria en el Estado de Sinaloa. — Min. Mex. XXVI, 1895,

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1060a. Valores de la plata y el oxo.—Min. Mex. XXXII, numeros 6-11 (Feb.

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10601 Las Minas de El Zapote, Estado de Sinaloa.— i/er. XXXV,

num. 9 (31 Ag. 1899).

1060c. La Mineria en Sinaloa.— il/u? Mex. XXXIX, num. 22 (28 Nov.

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1063. Morlet, Alberto. Una bonanza. Datos relatives a la Negociacion Minera de La Delfina” (Chilpancingo, Guerrero). — Min. Mex. XIV, 1887, numero 23.

1089. Muller, Carlos Iv. Ingeniero civil. Informe sobre reconocimiento y medidas en la zona minera de Buena Vista, jurisdiccion de Cuatro Cinegas, Distrito de Monclova, Estado de Coahuila.— Agr. Min. Junio, 1893, pp. 123-132.

1069a. Munix, Br. Manuel A. Higiene Minera.— A/L?, Mex. XXXI, num. 14 ( 30 Sept. 1897 ).

1069b. Munoaj, Baltasar. Informe sobre la Negociacion Minera ‘‘El Buen Despacho” situada en el Mineral de El Oro, Estado de Mexico. —Mexico, F. P. Hoeck. 1897. 12 p. 1 piano.

1069c. Informe sobre la Negociacion Minera “ Las Dos Estrellas ” situada

en el Mineral de El Oro y de Tlalpujahua, Estados de Mc'xico y Mi- choacan — Mexico, D. C Smith. 1898. 13 p. 1 piano (1:20 000).

1070. Mun02;, Celso. Noticia de las minas denunciadas ante la Diputa-

ci6n de Mineria de Tasco de Alarcon en todo el afio de 1874, seguida del azogue producido por los criaderos de Huitzuco — Min. Mex. Ill, 1875-76, niims. 7, 8 y 9

1070a. Munoaj d.e la Camara, £)nrique A. La region carbonifera de Nuevo Leon y Coahuila. — Min. Mex. XXXI, nfim, 14 (30 Sept, 1897).

1070b. La region de “ Las Esrneraldas ” por Tlatlaya, Sultepec, Estado de

Mexico. Historia, tradiciOn y riquezas. Sii fdcil y productiva restau- Mex. XXXIII, num. 14 (6 Oct. 1898).

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ntim. 3 (21 Jul. 1898).

1070d. — 7 " La regidn central del oro en Oaxaca — Min, Mex. XXXIV, ntim, 4 (26 Ene, 1899),

1071. Muno Gouiey, Manuel* Informe sobre el Mineral de Santiago

Minas y especialmente sobre la Mina de San Pablo Teoxomulco, en el Estado de Oaxaca. — Min. Mex. XII, 1885-86, niims. 25 i 27.

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Anexo ntim. 3 al optisculo Minas de oro e% BatopilaSy pp. 31-37.

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1074a. Rodolfo* Informe de la Negociacion Minera de San-

Eafael y Anexas, Pachiica, Hidalgo. 2 semestre de 3 900. — Mm. Mev. XXXVIII, num. 9 (28 Feb. 1901).

1075. Murillo, A. Informe de la mina de San Jose de las Bocas, Cosala

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1076. Muro, Iuis Cr* Noticia del estado que gnarda la mineria, de su

importancia y porvenir. Organizacidn de los trabajos y prestigio de los negocios en el ramo de mineria, en los distritos de Zacatecas, Fres- nillo, Sombrerete y Mazapil, pertenecientes al Estado de Zacatecas. — il/em. 31. F. 1883-85, V, pp. 99-109. — 3Im. Mex. XI, . 29 y 30.

1077. Organizacion de los trabajos mineros en Zacatecas. — J/in. 3Iex. XI,,

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1080. Yisita practicada a las minas del Partido de Mazapil — Bol Agr. 3Iin.

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1081. Murpliy, Patricio, Ingeniero de minas. Informe acerca de las

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1095a. Nevarea;, IBduardLo* El Distrito de Mina, Estado de Cliihuabua.

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1096. Nevarez, Rilario* El Distrito minero de Guadalupe y Calvo, Chihuahua. — 3[ei. XXVII, 1895, ndm. 16.

1096a. El Mineral de Guadalupe y Calvo, Chihuahua. — Min. 3Iex. XXX,

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1099a. Iewal, M4todos de Mineria Mexicanos. — 311%. 3Iex. XXXII,. nhm 12 (24 Mar. 1898).

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1108. Noriesra, Pedro, y Martineac, Migfuel Pozos artesianos. — 3Iin. 3Iex. XVIII, 1891, nums. 26 & 27.

Se ocupan de la posibilidad de hacerlos en Monterrey, etc.

1110. Nuno, Jesiis La Zona aurifera del Sr Grab Jos5 Cebellos en la

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1111. Nye, W. La Sonora. Etendue, population, climat, produits du

sol, mines, tribus indiennes, etc. — Paris, Bureau de la Revue Britanique. 1864. 8? 90 p.

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jurassique de Tehuacan, au Mexique. — Bull. Acad. B. Belgique. VII, 1840, pp. 212-221. 2 pi.

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1120. Oclioa, Juan B. El Canton de Jalapa — Aim. ila*. XII, 1885-86,

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1121. El carb6n mineral en Mexico. — Aim Alex. XII, num. 8.

1121a. olmedo y Lama, Jose. Ordenanzas de Mineria y Coleccion de las Leyes y Ordenes que con fecha posterior se han expedido sohre la

materia, arreglada por el Lie EdiciOii de Miuero MehiGano.

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1122. Ong-abiero, Bolores J. El Mineral de Huautla en el Estado de

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1124. Orcutt, C. It. The Gold-Fields of Lower California.— Tfesf Americcm Seientist, San Diego, Cal. YI, p. 4.

1126. Ordoneat, Lsequiel, Ingeniero del Instituto Geol6gico de Mexico.

Los hierros metebricos de Mexico. Cristales meteoricos — Aim. Soc. Alzate. Ill, 1889-90, p. 305-309.

1126a. Itineraries geolbgicos — Bol.Inst. GeoL Xos. 4-6, 1897, pp. 30-77. (3

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11 27a. Las rocas del Mineral de S. Josd de Gracia, Distrito de Sinaloa, Sin-

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1128. El Pedregal de S. Angel. Apuntes para la petrografia del Yalle de

Mexico— Aim. /Sbc. Abate. lY, 1890-91, pp. 113-116.— iYctt. 2serie, I, pp. 502-504,

1129. Apuntes para el estudio de las formaciones sedimentarias del Yalle

de Mexico. Las tobas calizas. — Mem. Soe. Abate, lY, 1890-91, pp. 239-

1130. Una ascension al Pico de Teira. — 3Iem. Soc. Abate. 1891-92, pp.

1131. Algunas obsidianas de Mexico. — Aim. Soc. Abate. YI, 1892-93, pp.

33-45, 1 1dm.

1132. La roca del Calendario Azteca. — illem. Sbc. Ab(de.\L 1892-93, pp.

327-332, 1 Idm . — La Nat. serie, II, 1S93, pp. 301-303, 1 htmina.

1133. Xota acerca de los ventisqueros del Ixtaccihoath — Alewi. Soc. Abate.

YIII, 1894-95, pp. 31-42.— FerA. GesellsJ. Erdkunde m Berlin. XXIII, 1896, p. 148.

1133a. Breve reseha de las excursiones verificadas durante el 7 Congreso

Geolbgico Internacional. — Aim. Soc. Abate. XI, 1897-98, pp. 81-87.

1134a. Note sur les gisements d’Or du Mexique. — Aim. Soc. Abate. XI,

1897-98, pp. 217-240.

1135a. Les filons argentifres de Pachnea. — Bull. Soc. Geol. Fr. 3d ser.,

XXVI, 1898, nhm. 2, p. 244-258.

1136. Reseha sobre el Mineral del Mezquital del Oro, Distrito de Juchipila,

E. de Zacatecas — Mexico, Tip. Secretarfa de Fomento, 1894, 8? 20 p.

— Bol. Agr 3Iin Abril, 1894, pp 189-206 — Mm Mex\ XXV, numeros 19 & 20.

1137. Informe sobre el Mineral de ‘El Zopilote,” Territorio de Tepic.

Apuntes sobre su G-eoiogia. — Mexico, Of. imp. de Estampillas. 1894. 89 19 p, 1 piano. — Bol. Agr, 3Iin. Mayo, 1894, pp. 166-182.

1138. Informe sobre la inspeccion de las minas ‘Guadalupana” y “El

Tajo,” sitas en el Eosario, Estado de Sinaloa, y de los perjuicios que con la explotacion de estas minas se ban causado a las fincas de la po- blacion — Bol Agr. Min. JuL1894, pp. 54-74.

1138a. DescripciOn de las rocas del Mineral de Pacbuca — Bol. Inst. GeoL

Xos. 7-9, 1897, pp. 101-125.

1139a. The Onyx-marble deposits of Jimulco, Coahnila. — Mem. Soc, Abate.

XV, 1900-1901, pp. 381-385.

1139b. Rocas Eruptivas, [Mexico] — Inst. Geol. de Mex., Bulls. Xos. 4-6, pp.

253-270, 1897.

1140. Las rocas eruptivas del Suroeste de la cuenca de Mexico — Bol. Inst-

Geol. X? 2. Mexico, 1S95, 4? 46 p. y figs.

1140a. Los criaderos aunferos de Mexico. — Min. Mex. XXXIII, num, 5 (4

Aug 1898).

1141a. La Industria Minera en Mexico. — Mexico, Tip. Seer. Fom. 1901.

19 p.

1141b. Un voyage a la Sierra Madre del Sur. — Mem. Soc. Abate. XIV, 1899-

1900, pp. 159-173.--ilfm. Mex. XXXVII, num. 22 (29 Xov. 1900).

1141c. Las Ehyolitas de Mexico — Primera parte. — Bol. Inst. Geol. Xo. 14,

1900, 75 p., 5 liims. & 1 mapa (1 : 10 000 000). — Segunda parte. — Bol. Inst. Geol. Xov. 15, 1901, 76 p., 6 lams (Abstract, Am J. Sci. 4th ser. XII, July 1901, p. 84).

1141d. The Mining District of Pachuca, Mexico. — Eng 3Iin. Jour. LXXII,

Xo 22, Xov. 30, 1901, pp. 719-721.

1141e. y Bose, K# Apuntes para laGeologia del Valle de Chilpancingo.

(Mit deutschem Auszug). — il/em. Soc. Abate. XIV, 1898-99, pp. 5-14, 2 figs

114 If. y Rans'el, Manuel. El Real del Monte — Bol. Inst. Geol Xo.

12, 1899, 105 p., 21 14ms. & 4 pianos.

1154. Ortega, Manuel, hijo. Informe sobre el estado que guardan las

minas de Proano y su hacienda de beneficio. — Mexico, F. Mata, 1881. 89 24 p — ilfm. Mex. VIII.

1155. Ortegfa, Manuel Valerio, Ingeniero de minas. Manual del

Azoguero 6 sea Teorfa y Pnlctica del beneficio de Metales de Plata por el Sistema Mexicano de AmalgamaciOn. — Xueva York, Imp. “El Polfgloto.” 1887. 8V72p.

1155a. Interesante a los ensayadores de metales — Min Mex XXX, nfim. 3

(21 Ene. 1897).

1157. Ortis;, Augustin R. Informe sobre la Mina de ConcepciOn en el

Mineral de Catorce. — 3Iin Mex XI, 1 884, ntim. 3.

1158. P. M. La Mineria en Guanajuato. — Min. Mex. XXVIII, 1896, numeros 12 & 16.

11 ( 30 La, Estadistica Minera y los Empresarios — 3Im Mex. XXVIII,

1896, ntims. 24 & 26.

116L El ttlnel Xepton y el porvenir de la Mineria en Pachuca. — ilfm. Mex.

XXIX, 1896, nlimero 4.

654 Bibliography Of Mexican Geology And Mining.

1164a. OsclteniiiS) I>r. Carl. Naturlicher Koks in den Santa Clara- Kohlenfeldern, Sonora, Mexico. — Zeitf prak, Oeol. 1900 (Jan.), p. 21. 1165a. Osdel, E. B. Ton. The Etzatlan Mining District, Mexico.—

Mm, Jour, LXXIII, No 7, Feb 15, 1902, pp. 243-244.

1166. Oviedo Bavid. Los nuevos placeres de la Baja California. — Min. Me,r XXYII, 1895, num. 11.

1168a. Falacios, J. Algnnas observaeiones aproposito de los metodos vo- lumetricos — El Estandarte, San Luis Potosi. — Min,. XXXV.

num 7 (3 7 Aug. 1899).

1169. Palmer, Howard. Metodo empleado por los mexicanos para el trabajo de las minas — Min. Mex XXIV, 1894, num. 20.

1169a. Pant, Camilo R. La Gran Fundicion Central Mexicana (Aguasca- lientes). — ..1 m. Asoc Ing. VII, 1898, pp 315-323.

1171a. Paredes, Cuis. Algunas mejoras en las baterias de mazos. — Min. 3/ej. XXXI, nlim. 1 (1 Jul. 1897).

1172. Paredes, M. Placeres de oro y plata (Sonora) — Bol. Soc. Geog, 1?-

ep. XI, 1865, pp.' 138-139

1173. Parkman, Pat>lo. Informe sobre las minas del mineral del Gallo,

Guadalupe, etc — Mexico, Tip. R Hafael, 1848, 89

1175. Parres, Pelipe leri de. Minas de Pachuca en Marzo de 1860.

— A MS. Mm. Mex. I, pp. 151-152.

1176. Parry, C. C. Geological Featui’es of the Rio Grande Valley from El

Paso to the Month of Pecos River — Rep U. S. Mexican Boundary Survey. I, part 2, 1857, pp. 49-61

1177. Reconnaissance to the Mouth of the Gila River from San Diego,

Cal. — Rep U. S. & Merican Boundary Survey. I, 1857, pp. 125-130.

1180. Pastor, Manuel, Ingeniero. Informe a la Secretarla de Fomento, sobre las medidas y exploracibn de la zona minera California,” en los cantones de Autlan y Mascota, Jali'CO. — Bol Ac/r. Min. Feb 1893, pp 309-326.

1182. Patoni, Carlos. Informe sobre la determinaciOn de la zona minera de Potrillos (Durango). — Bol. Apr. 3Iin. Ag. 1893, pp. 108-123,

1183a. Payne, Hrnest KI. Minas de Velardeha, Durango Mex. (Transl.

3Iines 3finerals.) — 3{in. 3fex. XXXVIl, num. 15 (11 Oct. 1900.) —

3Iin. 3Ieio, XXXVIII, num. 21 (23 Mayo 1901).

1185. Payno, Iic. Manuel, y Castillo, Antonio del. El Fres- nillo y sus minas. — 3Ius. 3Iex, 11, 1843, pp. 5-14.

1187. Pa;i;os y Sacio, Vicente. Amalgamacion en tinas. — 3Iin. 3[ex>. XXYII, 1895, ntini. 14.

3187a. Pearce, Bicliard. Notes on the Occurrence of Selenium with Pyrite Rich in Gold and Silver. — Bull. Colo. Sc. Soc. No. 5, 1898, pp. 1-2. (Including notes on Mexican specimens. )

1188a. Pelet, P. La Basse Californie d’aprs M. L4on Diguet. — Annales de Oeogr. ParL, 1900.

1189. Pellico, Ramon, Ingeniero de minas. Sobre nna clase de hornos

de Camaras para beneficiar el mineral de azogue, con aplicaciOn al de las minas de Almaden. — Nat. II, p. 134-139.

1190. Penfield, Samuel C. On a Variety of Descloizite from Mexico.

—Am. J. Sc. 3d. ser. XXVI, 1888, pp. 361-365.

1196. Pereaj Arroyo, Oleuterlo. La amalgama nativa en el Terri- torio deTepic. — 3Bn. 3fex. XXYII, 1895, nhm. 19.

Bibliogkaphy Of Mexican Geology And Mining. 655

1203. Motnan* El Mineral de Tepezala (Aguascalientes). — Min,

Mex, XI, 1884, num 13.

1208. Joiin* Informe acerca de la Zona Minera de San Lo- renzo, Estado de Sinaloa. — JBol. Agr. Ilin. Nov. 1892, pp. 221-256.

1208a. PllillipS J. Compania Minera Anglo-Mexicana, Lira. Informe sobre sus trabajos. — Bol. Agr. Min. March 1899, pp. 71-80. (Some notes on San Jose de Gracia mines )

1209. Pictiardo, Vicente, y Orapea, Ignacio. Tlalpujahua de

Eayon — Min. iLTer. I, 1873, nums. 12, 14, 15y 18.

1214. Pino, Pedro Paustista. Noticias historicas y estadisticas de la

antigua provincia del Nuevo-Mexico. Cadiz el afio de 1812. Adicio- nadas por el Lie. D. Antonio Barreiro en 1839 ; y ultimamente ano- tadas por el Lie. Don Jose Augustin de Escudero, para la Comision de Estadistica Militar de la Eepublica Mexicana. — Mexico Imp. de Lara. 1849. 8? 102 p. 1 piano. Contiene en el cap. 139 dates relatives li las producciones minerales, materiales de construccion, etc. , pp. 65-70.

1215. Piquero, Ignacio* Apuntes para la Corografia y la Estadistica

del Estado de Michoacan. — Bol. Soc. Geog. 1?- 4p. I, pp. 142-237, Describe la configuracion del Estado, montanas, volcanes, minerales, haciendas de beneficio, etc.

1222. Ponce de leon, Miguel M# Informe acerca de la mina nom-

brada “El Porvenir,” presentada al Ministerio de Fomento — Min. Mex. I, 1873-74, ndm. 15.

1223. Porto, Pedro P, Corredor de minas. La Negociacidn de Cande-

laria y Anexas, en Pinos, Zacatecas. — Min. Ifex. XXI, 1892, num. 14.

1224. Potts, Juan. Chihuahua. Apuntes descriptivos de ese Estado. —

Bol. Soc. Geog. 29 e. IV, 1872, pp. 279-283.

Da algunas noticias de minas.

1225a. Prescott, VIT. £1* History of the Conquest of Mexico, with a Pre- liminary View of the Ancient American Civilization and the Life of the Conqueror, Hernando Cortez. 3 vols. New York, 1849. Harper & Brothers.

1226. Prime, Pederico. M4todo Chileno de Amalgamacion. — Alin. Mex.

I, 1873-74, nums. 48 y 49.

1227. Pritcliardj Ouillermo. Beneficio de metales por amalgamacibn.

—Prop. Ind. 1875-76. Num. 28.

1227a. Pritcliet, C. W- Views of an Old Smelter in Morelos, Mex. — Ab- stract Ewy. Mm. JbiAr. LXXII, No. 22, Nov. 30, 1901,p. 715 ; also Tram. Am. Inst. Min. Bng. Vol. XXXII, p. 251.

1228a. Ancient Copper-Smelting in Mexico.— Alin. Jour. LXXIII, No.

7, Feb. 15, 1902, p. 246, 2 fig. (An old smelter in Inguar4n, Mich- oaedn).

1230. Pugfa, Ouillermo B., Ingeniero geOgrafo y topografo. Besefia

de la Topograffa y Geologfa de la Sierra de Guadalupe, — Afem. Soc. Abate, II, 1888-89.

Situacibn y aspecto fisico, pp. 66-70, Geologia, pgs. 73-85. (Con un piano, 1:100 000).

1231. Kesefia Geoldgica de la Sierra de Guadalupe.— La Nat. 29 serie, I,

1887-91, pp. 197-205. Con un piano.

Es la parte geol6gica de la Reseha anterior.

1232. Resefia de una exploracion geol6gica en el Estado de Veracruz. —

‘ La Nat. 29 serie, I, 1887-91, pp. 49-53. 1 Mm.

Vol. Xxxil— 39

656 Bibliography Op Mexican Geology And Mining.

1233. El cerro de la Estrella 6 de Ixtapalapa . — La Nat. 2® serie 1, 1887-91,

pp. 488-492. 1 lam.

1237. Resena de una excursion a la Caverna de Cacahuamilpa y a la Grata

Carlos Pacheco organizada por el Institute Medico Nacional. — Mem. Soc. Abate. Y, 1891-92, pp. 113-224.

Contiene dates geograficos y geologicos con un perfil geologico y altimetrico.

1238. Apuntes para la Geologia del Valle de Mexico. El Peii6n de los

Banos. — La. jS'ai. 2? serie, II, pp. 86-96, 2 lams.

1242. Quintana Moo, Andres. Exposici6a presentada ti la Camara

de Representantes, en apoyo de la solicitud del Gobierno de Zacatecas, sobre que se exima a las platas de las minas que sostiene el Fresnillo, el derecho llamado de Mineria (?)

1243. Quintero, Damian. Informe relative a la Zona Minera del Re-

alito (Sinaloa). — Bol. Agr. Min. Jul. 1893, pp. 259-266.

1243a. Quintero, Salvador. El Distrito de Mascota. 109 Canton del Estado de Jalisco — Min. Mex. XXXIII, num. 12 y 13 (22 y 29 Sept. 1898). (Some words on the mining districts of Cuale, Bramador, El Desmoronada Aranjuez, Guadalupe 6 Cumhre de los Arrastrados, San Sebastian, Los Reyes, Jalapa, Navidad and Huachinango).

1246. Ramirea, Genaro B. El metal bianco. Perspectiva que tiene

en Mexico por los nuevos procedimientos de beneficio. Experimentos de amalgamacion sin cloro. — Min. Alex. XXII, 1893, num. 26.

1247. Ramirez;, Uc. Jose Reman do. Xoticias histOricas y esta-

disticas de Durango (1849-1850). — Mexico, Imp. de I. Cumplido. 1851. 88 p. 40 Soc. Geog. 4p. Y, pp. 6-115.

Hace una descripcidn de la situaci6n de la ciudad de Durango, del cerro de Mercado y sus riquezas, del pedregal de la Breha, los vol- canes extinguidos, cavernas, aguas termales, etc.

1248. Ferreria de Durango. — Mus. ALex. I, 1843, pp. 28-34, 1 him. del cerro

de Mercado.

1249. Ramirez;, Uc. Jose Ripolito. Alegato de buena prueba pre-

sentado por el Lie por parte de Don Juan Chynoweth, D. Juan

Rule y Dona Susana Daniel en el juicio seguido contra la Compafua aviadora del Mineral del Monte y Pachuca, sobre propiedades en la Mina de San Pedro. — Mexico, Imp. 4 c. de Miguel M. Barroeta, 1867. 89 123 p. 1 Mm.

Contiene al fin nn Informe del perito D. Miguel Bustamante.

1250. Ramiref?, Justino. Informe presentado 4 los Senores Porcioneros

del Socav6n de Sirena (Guanajuato). — Aim. Alex. I, 1861, pp.

1251. Ramirez, SantiagfO, Ingeniero de minas. Combustibles min*

erales. — El Alexicano. I, 1866, num. 48 (Junio 21), pp. 377-380.

1252. Beneficio del cuarzo aurifero en el Mineral del Oro. — EdiciOn de

'El Explorador Minero.’ — Mexico, Imp. PoHglota de Carlos Ramiro. 1877. 31 p. 89 —La. Nat. I, 1868-70, pp. 308-335.— Jfiw. Alex. I, 1873-74, mums. 41 44.

1253. Las Ordenanzas de Mineria. Sus inconvenientes en la actualidad,

necesidad de au reforma y medios de efectuarla. — Mexico, Imp. I. Escalante. 1871. 89 18 p. — Min. Alex. I, 1874, nhmeros 24, 25 y 26,

El Mineral de Temascaltepec. — Min Mex. XXXI, nhm. 25 (16 Dec.

1897.)

1253a.

Bibliogeaphy Of Mexican Geology And Mining. 657

1255. Apuntes geognosticos, estadisticos, mineralogicos j geograficos sobre

el Mineral del Oro. — Bol Soc. Geog. 2 ?- e. IV, 1872, pp. 208-224. — 3Im. 3Iex. II, numeros 8 a 14 y 17.

1256. Combustibles minerales, — 3Iin. 3£ex. I, 1874, num 31.

1257. La Mineria en el Congreso. — 3Iin. 3Iex. I, num. 34 .

1261. Exposici 6 n presentada a la vSociedad Mexicana de Geografia y Esta-

distica para la formaci 6 n de la Estadistica Minera de la Eeptiblica. — Bol SoG. Geog. ep. I, 1873, pp. 152-157.— J/i'i. 3Iex. I, ntim. 53

1262. Carta relativa a una supuesta Iluvia de azogue en el Estado de Sina-

loa. — Bol Soc. Geog. ep. I, 1873, pp 286-291.

1265. El Mineral de Tlalpujabua. — 3/m. 3Tex. II, num 3.

1269. Estudio metalifero del Distrito minero de San Nicolas del Oro. —

3Im. 3Iex. II, 1874-75, numeros 9, 10 y 12.

1270. El mercurio en Mexico. — 3/m. 3Iex. II, ndm. 15.

1271. Los trabaj adores en las minas. — 3/m. 3/ex. II, num. 16.

1272. Informe sobre el criadero de mercurio en el cerro de Guadalupe, Dis-

trito de Huetamo. — 3/iu. 3/ex. II, num. 21.

1282. Apuntes sobre la formacibn mineralogica y geolbgica del Distrito

Minero de San NicoMs del Oro. — Bol Soc. Geog. 4p. II, pp. 406-436.

1283. La libre exportacibn en el ramo de Mineria. — Prop. Bid. N 9 33.

1284. Las Diputaciones de Mineria en el Estado de Mexico. — 3/m. 3Iex.

Ill, 1876, num. 2.

1286. La Legislacibn sobre Mineria en Mexico — 31m. 3/ex. Ill, ndmeros

45 a 47.

1291. El Miueral del Oro. Apuntes para la mineria de este Distrito.

Edicion de El Explorador 3/mero. — Mexico, Imp. Pol. de C. Eamiro. 1877, 43 p. 89

1292. Informe presentado al Senor Ministro de Fomento sobre el reconocimiento

practicado en el Mineral de Cuitlanapa en el Estado de Guerrero con motivo de un criadero de estaiio para cuyos trabajos fu4 solicitada una subyencibn. (1878). — Mexico, Tip Lit. de F. Mata. 15 p. 89 — Ans. 3/. F. Ill, 1877, pp. 331-337 .—3/ew. 3LF. 1877-82, I, pp. 457-461.

1293. Informe sobre el Mineral de Guadalcazar en el Estado de S. Luis

'Potosi, presentado al Seiior Ministro de Fomento. (1878.) — Mdxico, Imp. J. V, Villada. 1879. 90 p. 89— Am. 31 F. Ill, pp. 339-404.— 3/em. 31. F. 1877-82, I, pp. 461-498.— Eo/ 31. F. IV, 1879, . 64 A 65.

1298. Informe sobre la negociacibn de minas que en el Distrito de Huetamo

en el Estado de Michoacan, sostiene la Compania Minera Limitada de Eio Grande y Dolores. — Mexico, Tip. Lit. F. Mata, 1879. 34 p. 8 — 3/m. 3/ex VII, . 37 y 38.

1300. Comisionado especial para la exploracibn de la Sierra Mo jada. In-

forme que como resultado de su exploracibn en la Sierra Mo jada rinde al Miniaterio de Fomento. — Mdxico, F. Diaz de Le 6 n, 1880, 63 p. 89 4 lams, y 1 piano (1.100000). — Am. 31. F. Ill, pp. 627-687. — 3/em. 31. F. 1877-82, 1, pp. 499-535.— 3/m. 3/ex. VII.

1307. El Congreso Geolbgico Internacional. — 3/m. 3/ex. VII, ntimero 43.

1308. Informe i la Secretarfa de Fomento, de exploracibn en los Distritos

de Matamoros Izticar, Chiautla y Acatlln, en el Estado de Puebla, y del estudio de sus criaderos de carbbn mineral. — Mexico, Tip. F. Mata. 1881. 132 p. y 1 piano. (1:400 000). 89 — Xiis. 3/. F, VII, pp. 7- 96.— 3/em. 31. F. 1877-82, I, pp. 537-592.— 3/m. 3/6x. VIII.

Bibliography Op Mexican Geology And Mining.

1309. Informe sobre los criaderos de carb6n mineral en el Estado de Tlax-

cala.—Mexico, F. Mata, 1881, 17 p. —Ans. M. F. VII, pp. 99-107.— Mem. M.F. 1877-82, 1, pp. 593-598.— A/ex. VlII.

1310. Estadio de unos ejemplares de carbOn mineral del Distrito de Tlaxia-

co, Estado de Oaxaca, por disposiciOn de la Secretaria de Fomento — .4ns. M. F, VII, pp. 108-113.— 31 F. 1877-82, I. pp. 598-601.— Min. 3Iez. IX, num. 1.

1311 Informe a la Secretaria de Fomento sobre una exploracion en la Mu-

nicipalidad de Tlaquiltenango, Distrito de Tetecala, Estado de More- los, para el reconocimiento de unos supuestos criaderos de carbon. — Am. 31. F. VII, pp. 114-128.— A/m. 31. F. 1877-82, I, pp. 601-610.— 31in. 3Iex. IX, num. 9.

1313 , El dominio radical de criaderos de carbon. Estudio minero-legal.—

Am. 31. F. Vir, pp. 136-146.— A/m. 31. F. 1877-82, I, pp. 614-619 — A/m. 3Iez. VIII.

1315. Informe sobre la exploraciOn en los yacimientos carboniferos del

Distrito de Huetamo, Michoacan. — Am. 3L F. VII, pp. 178-191. — A/em, 31. F. 1877-82, I, pp. 629-637. — 3Iin. A/e.r. IX, niimeros 10 y 11.

’ 1316. Cuestion Minero-Legal. Breves reflexiones sugeridas por la lectura

del pedimento fiscal, en el amparo pedido por los opositores a los denuncios mineros de la Victoria en San Luis Potosi. — Mexico, Tip. F. Mata, 1881. 129 34 p.

1317. Estudios sobre el carb6n mineral. — Mdxico, Imp. F. Diaz de Le6n,

1882, 179 p. 89

Es la reimpresidn de las memorias nums. 1309 a 1316 publicadas en Am. 31. F. y 3Iem. 3£. F.

1318. Informe sobre la exploraciOn en el Cant6n de Jalapa con el objeto de

examinar sus terrenos carboniferos. — 4ns. 31. F. VII, pp. 306-332. — A/tn. 3Iex. IX, 1882, nfims. 21 a 24.

1319. Informe sobre la exploracidn en los terrenos de Tulitic, Distrito de

Alatriste, Estado de Puebla, con el objeto de estudiar sus yacimientos de carbbn.— Mns. 31. F. VII, pp. 524-537.— A/m. 3[ex. IX, 1882.

1320. Los criaderos de carbbn en el Estado de Coahuila. Ligeras observa-

ciones al decreto que expidib la Legislatura del Estado el 25 de Agosto ultimo. — Mdxico, Tip. Lit. F. Mata, 1882. 16 p. 129

1322. Los criaderos de carbOn y la Suprema Corte de Justicia. — A/in. 3[ex.

IX, ntim. 20.

1323. La inspecciOn pericial en los trabajos de minas. — 3Ivn. 3Iex. IX,

. 39.

1324. Informe 4 la Secretaria de Fomento sobre una exploracibn en los mine-

rales de La Campechana en el Estado de Guanajuato, y Comanja y el Roble en el de Jalisco. — Am. 31. F. VII, pp. 548-581. — A/in. 3[ex. X, nfims. 5 4 8.

1325. Informe relative al reconocimiento de la negociacibn minera llamada

Minas de la Canal y anexas,” Mineral de Zacualpam. — A m. A/. F. VII, pp. 582-604.— A/in. Mex. X.

1326. Informe sobre los depositos carboniferos del cerro del Tambor, Dis-

trito de Huauebinango. — Mexico, F. Diaz de Le6n, 1883, 29 p. — A m. 31. F. VII, pp. 688-699.— La JVat. VI, 1882-84, pp. 284-293.— A/in. 3fex. X.

1327. La uniformidad en la Legislacibn Minera. Exposicibn elevada 4 la

Juntas Directiva de la Sociedad Mexicana de Mineria por la Comisibn

Bibliog-Eaphy Of Mexican Geology And Mining. 659

Primera de Legislacion. — Mexico, Tip. Lit. F. Mata, 1883. 23 p. 129 La ComisiOn la formar6n los Sres. D. Pedro Escudero j EcEanove, Don Santiago Eamirez y Don Pedro Bejarano.

1328. La Propiedad de las Minas. Estudio Minero-Legal. — Mdxico, Tip.

Lit. F. Mata, 1883. 104 p. 12 —Min. Mex. X.

1329. La nnidad en la Legislacidn Minera. — Min. Mex. X, 1883-84,

num. 18.

1330. Los yacimientos carboniferos de Sonora. — Min. Mex. X, numero 35.

1331. La Exposicion Minera de Zacatecas. — Min. Mex. X, ndm. 44.

1334. Xoticia historica de la riqueza minera de Mexico y de su actual estado

de explotacion, por disposicion de la Secretaria de Fomento. — Mdxico. — Tip. Secretaria de Fomento, 1884, II, p. 768.

Esta interesante obra contiene lo siguiente : Bosque jo historico de la Mineria en Mexico — Caracter general de la Minena en Mexico. — Pro- ductos mineros de Mexico — Estados mineros. — Explotacibn de las minas y beneficio de los minerales — Influencia de la Mineria en Mexico. — Produccion minera apreciadapor la acunacion. — Legislaci6n minera. — Bibliografia minera. — Epilogo.

1337 . Observaciones al nuevo C6digo de Mineria expedido por decreto de 22

de Noviembre de 1884 — Mexico, F. Diaz de Le6n, 1885. 79 p. 8?

1338. El desagiie de las minas. — Min. Mex XI, 1884, num. 2.

1339. Los socavones de las minas. — Min. Mex. XI, num. 3.

1340. Las Companias Mineras. — Min. Mex. XI, nAm. 4.

1341. Los avios en las minas — Min. Mex XI, ntim. 5.

1342. Las operaciones de las minas — Min Mex. XI, ndm. 6.

1343. La Eneenanza Minera. — Min. Mex. XI, ntim. 9,

1351. Informe que rinde a la Secretaria de Fomento el Ingeniero

comisionado para hacer la exploracibn y senalar las pertenencias mi- neras en la zona concedida a los Sres. Antonio Munoz y Companfa en el mineral de Temascaltepec. — Bol. Agr. Min. Abril, 1893, pp. 199-r255.

1352. y Barcena, Mariano. Informe sobre el fenOmeno geol6g-

ico de Xochitepec. — Bol. Soe. Geog.Z p.II, 1874-75, pp. 48-60 — Min. Mex. II, ‘numeros 40 y 41 .

1353 . y RamoSy Joaquin M., Ingeniero de minas. Memoriapara

el estudio minero del Distrito de Ixtlahuaca — Mexico, Tip. Secretaria de Fomento, 1886. 126 p. fol. — 3Iin. Mex XII y XIII.

1360. Rammelslierg*, Dr. De la Enargia de Mdxico y de una nueva

localidad de Berthieria. — Nat. Ill, pp. 336-340. — Zeits. D. Oeol. Gee. XVIII, 1866, p. 341.

1361. De la Domeykia (Domeykit) de Paracatas (Mexico) — Nat. Ill, pp.

341 & 342.

1362. Ramon, R. K. Las aguas termales de Coabuila (San Buenaventura).

—3Iin. Mex. XXV, 1894, num. 5.

1362a. Ramonnet, G. Informe de las minas Sta. Ana y Anexas ubicadas en el mineral de Otzumatlan, Distrito de Zinapcuaro, Michoac4n. — 3Im. Mex. XXXI, ntim. 10 (2 Sept. 1897).

1364. Ramos, Joaquin M., Ingeniero de minas. Informe para los tra- bajos de la NegociaciOn Minera ‘‘ Purisima Concepcibn’ en Guadalc- zar. — San Luis Potosi, Tip. del Eco de la Moda, 1882, 89 12 p. — Min. Af&r. IX, niims 30 y 32.

1355 . Informe relative 4 los trabajos ejecutadospor la Comisibn Explora-

dora de la Baja California el ano de 1884. Presentado 4 la Secretaria

660 Bibliography Of Mexican Geology And Mining,

de Fomento. — Mexico, Tip. Secretaria deFomento, 1886 8o 178 p. 19 Uminas.— 3Im, F, VIII, 1887, pp. 117-327. 19 lams —Bol. 31. F, X, ntims. 122 a 128 (Feb-Abr. 1886).

1366. Negociaci6n Minera de ConcepciOn en Catorce. Reseiia de los traba-

jos ejecutados durante el primer semestre del ailo de 1889. — San Luis Potosi, Imp. M Esquivel 7 C?-, 1889, 89 22 p.

1367. Compania Minera Anonima de Concepcibn j anexas en Catorce. Me-

moria de los trabajos correspondientes al ano niinero que termind el 30 de Junio de 1889, j estado general correspondiente al mismo periodo. — San Luis Potosi, Imp. M. Esquivel j C, 1889. 89 gr 25 p%.

1367a. Randolpli J. C. K# The New Mill at Batopilas, State of Chihua- hua, Mexico. — Trans. Am. Inst. Min. Eng. vol. X, p. 293.

1367h. Rangfel, Manuel* Explotacion de las minas en el Mineral de Pa- chuca. — Bol. Ins. Geol. ntims. 7-9 1897, pp. 129-141. — 1/m. 1/e.r. XXXI, ntim. 15 7 16 (7 7 14 Oct. 1897).

1367c. Criadero de fierro del Cerro Mercado, Durango. — Bol. Inst. Geol.

ntim. 16, 1902. pp. 3-14 2 Mm.

1368. Ratli, Gerliard von. Einege geologische wahrnehmungen in

Mexiko. — Boon, 1887.

1369. Raymond, 'W. Historia de los valores relativos del oro 7 la

plata. — Min. Alex. Ill, 1875-76, ntimeros 13, 14 7 15.

1370a. Reinoso, Manuel* Pozos artesianos. — Min Alex. XXXIII, ndm. 22 (1 Dec. 1898).

1371. Remond, Notice of geological explorations in northern Mexico.

—Proc. Cal. Ac. Sc. Ill, 1867, pp. 244-257.

Kefiere el descubrimiento de fdsiles de la serie Comanche en Sonora.

1372. Requena, Jose luis* Protesta respetuosa de los mineros de

Tlalpujahua contra la nueva Le7 Minera. — Mexico, Imp. J. F. Jens. 1892. 129 15 p.

1374. Reyes, Jose Ascension. Estudios sobre el Estado de Zacatecas.

Biografias, Historia, Instruccidn ptiblica, Literatura, Geografla, Indus- tria. Fauna, Flora, Mineria 7 Estadistica. — Zacatecas, Imp. del Comer- cio de Ireneo Kuiz 7 Cia. 1890. 89

1375. Reyes, Jose Maria* Los Minerales de la Sierra de Quertaro. —

Min. Mex. VII, 1880-81, ntim. 27.

1376. El Mineral de Zacualpan. — Alin. Alex. VII, 1880-81, ntim. 29.

1377. Reyes, Uc. Severo Ilegalidad con que se ha procedido, en el

denuncio hecho por la llamada Compania del Socav6n de la Victoria. Alegato presentato ante el Juzgado de Distrito, solicitando amparo

contra la Diputacibn de Mineria, por Ejecutoria de la Suprema

Corte. — San Luis Potosi, Imp.de Ddvalos, 1881. 89 72 p. — Alin. Alex. VIII, 1881-82.

1379. Reynoso, F'ran cisco, Ingeniero de minas. Negociacidn de ''La

Concordia.’’ Memorandum sobre la maquinaria procedente de la Fbrica "Union Iron Works” de San Francisco, Cal., instalada en el Tiro General de Ea7as, para el desagiie de esta mina 7 de la Mellado. —Bol Soc. G. Ing. I, 1888-89, pp 29-37. 1 Mm.

1380. Algunas consideraciones sobre las ventajas que en el laborfo de las

minas proporciona la apertura de galerfas 6 socavones de desagiie. Caso particular del socavdn "San Andres” en la Mina de Ba7as, Costo de esta obra, 7 economfa que por su medio se ha realizado en el tiltimo desagiie de "La Concordia.” — Bol. Soc. G. Ing. I, 1888-89, pp.

1 388ti.

1388b.

1415a.

Bibliography Of Mexican Geology And Mining. 661

Trabajo Atil y resistencia de los cables de extraccibn. Accidentes por rotura de los cables metalicos pianos usados en el desagiie de las minas de “La Concordia.”— Soc 0. Ing, I, 1888-89, pp, 138-146.

Cliarles* Excursion de reconocimiento al Mineral de Talea, Villa Alta, Oaxaca— Aim Mex XXIX, 1896, num. 23.

M-icliter & Hiiljiier'* Xoticia sobre el beneficio de los residues de amalgamaciOn por el mdtodo de Patera, en Guanacevi, cerca de Du- rango. — Min. Mex. lY, nAm. 43

Rileil, jr J. Informe qiie rinde la Gran Fundicion Central Mexi- cana, sixiursal de “Tlie Guggenheim Smelting Co.” sobre los trabajos y adelantos de la empresa desde su principio hasta fin del ano fiscal que concluyo el 30 de Junio de 1896 —Bol Agr. Min Enero 1899 pp.

Rio, Andres Manuel del. Esperimentos de Karsten sobre el beneficio de azogue, sacados del Diario de Farmacia de Paris de Dicl- embre de 1830.— Philadelphia, Abril, 1831. Imprenta Adam Waldie. 89 7 p.

Manuel de Geologia extractado de la Lethaea geognbstica de Bronn con los animales y vegetales perdidos 6 que ya no existen, mds carac- teristicos de cada roca, y con algunas aplicaciones los criaderos de esta Keptiblica para uso del Colegio Nacional de Minerfa — Mdxico, Imp. I. Cumplido. 1841. fol. apaisado. VIII-70 p. 5 grabados intexcal- ados y 27 Urns.

Silver-ores reduced by the method of Becquerel — -Trans. Am. Phil

Soc. New Series, IV, p. 60.

Rio de la loasa, leopoldo, y Crareri, Opfisculo sobre los pozos artesianos y las aguas naturales de mas uso en la ciudad de Mdxico, con algunas noticias relativas al corte geolbgico del Valle, y una lisia de las plantas que vegetan en las immediaciones del desierto yiejo. — Bol Soo, Geog. H dp. VI, 1858, Suplemento, p. 9-28, 1dm.

Rio de la I<oa, Velaque;e de Xeon y Zaldivar* Dictamen que presentO la Comisibn de Ciencias Naturales sobre la muestra de carbOn de piedra de la mina situada en el Departamento de San Juan de los Llanos del Estado de Puebla.— Soc. Qeog. I?* dp. 111,1854, pp. 17 A 18.

Ritter, Lower Californian Eruptive Bocks. — ylrc/iwes des Sciences XXXin, 1896, p. 330.

Riirera Canitias, Manuel, Ingeniero de minas- Memoria sobre el Mineral de Pachuca. — Mdxico, Imp. J. M. Andrade y P. Escalante. 1864. 89 40 p.

— — Ilistoria antigua y moderna de Jalapa y de las revoluciones del Es- tado de Veracruz. — Mdxico, 1869, Imp. de I. Cumplido. 5 t. 89, Hms.

T. I, 29 parte, Cap. X. Estudio geolOgico del territorio que hoy for- ma el Estado de Veracruz — Geologfa del Cofre, — Cafiada de Actopiin. — Barranca de Zomelahuacl'in. — Estudio geolbgico de los terrenos de Jalapa, p. 166-161.

— Estadtstica Minera de Mdxico. — Min. ilkx. II, 1874-'85, niimeros 40 d 61.

— Las Imelgas de los mineros. — Min. Mex. II, 1874-75, nfimero 46.

— Azogue. — Min. ife. II, 1874-76, 47 y 48.

RiTOt, I,, F., Ingeniero de minas, Profesor de la Escuela de Minas de Paris. Beneficio de toneles cn Bretaha, Hacienda de Hnelgoet. — Am. Min. i/etr. I, 1861, p. 296-315.

662 Bibliography Of Mexican Geology And Mining.

1424 Roliertsoily Wm. Farisli* A Visit to Mexico, hy the West India Islands, Yucatan and United States, with Observations and Ad- ventures on the Way. In two volumes London, The author. 1853. 8?

En la parte IV, vol. II, p. 155-266 contiene : Heal del Monte ; Es- tadistica minera, La Hacienda de Kegla; Informe de M. Buchan acerca de Heal del Monte; las minas del Fresnillo.

1425. Feajuela, luis, Ingeniero de minas Memoria presentada a el Emperador por el Ministro de Fomento, de los trabajos ejecutados en su ramo el ano de 1865. — Mexico, Imp. J. M. Andrade y F. Esca- lante, 1866. 4® 658 p. 12 lams.

Contiene, ademas de varies estudios, noticias y estadisticas mineras, etc.

1426. Explotaci6n del cinahrio. — 3£m. 3Ien I, 1873-74, num. 29.

1427. Los ruidos subterraneos en Guanajuato — 3Iin. A/er. II, 1874-75,

num. 36.

1428. Proteccidn a la Mineria . — Prop hid, 1875-76, N9 26.

1429. Desagiie de las minas. — Prop. Ind. 1875-76, N9 31.

1430. La Mineria y los mineros. — 3Iin 3Iex, IV, 1876-77, . 30-31.

1431. Rocliaf Jose Ingeniero de minas Estudios sobre la Estadistica

minera de Guanajuato- Primera edicidn. — Le6n, Tip. J. Villalpando, 1884. 89 70 p.

1432. Rockstroli, Kdwin. Informe de la Comision Cientifica del In-

stitute Nacional de Guatemala, nombrada para el estudio de los fen6- menos volcanicos en el Lago Ilopango de la Heptiblica del Salvador. — . 3Iex VII, 1880-81, ntimeros 32 tt 36, 41 y 43.

1433a. Roflrigueas, Ramon* AnAlisis delaguade Tequixquiapam. Que- retaro. — Afem Soc, Alzate, XIV, 1899-1900, pp. 339-352.

1434. Rodrig:uea Rey , Francisco, Ingeniero. Historia de las Minas. — 3Iin, Mex. 1, 1873-74, ndm 35.

1437. Rolker Cliarles IWt. The Production of Tin in Various Parts of the World. — (Mineral Hesources of the U. S.). — An. Pep U. S. Genl. Survey. XVI, 1894-95, III.

Mexico, pp. 519-522 Se ocupa de los yacimientos de la Baja Cali- fornia, Durango, Zacatecas, Jalisco, Querdtaro, Guanajuato y San Luis Potosi.

1442. Romero, Rr* Jose Ouadalupe. Noticias para formar la his-

toria y la estadistica del Obispado de Michoacfin — Mdxico, Imp. V. Garcia Torres, 1862, 251 p. 3 mapas v Urns. 49 —'Pol. Soc Oeog. 19- dp. VIII, pp. 531-560 & 609-640 ; IX, pp 1-188.

Contiene numerosas noticias de gran interds relativas a manantiales, aguas termales y minerales, minas, haciendas de beneficio, etc.

1443. Romero, Jose Maria, Ingeniero topOgrafo, Memoria sobre el

Distrito de Pachuca. — (Mem. de la Com. Cient. de Pachuca dirigida por el Ingeniero H. Almaraz. Mexico, 1865.)

P%s. 75-190 contiene ligeros apuntes relatives a la constituciOn geolOgica.

1444. Geologia de Querdtaro.—Ho. Soc. Ing Jal. 11, 1882, p, 228-237,

1444a. Romero, Jose M.; Fenockio, Pascual A., y Salazar,

Remetrio* Congreso de la Uni6n. Cdraara de Diputados. IS®* Legislatura. ComisiOn de C6digo de Mineria. Proyecto de Ley Mi- nera de los Estados Unidos Mexicanos. — Mdxico, Tip. Secretarfa de Fomento, 1892. 89 24 p.

Bibliography Of Mexican Geology And Mining. 663

1446. Romero, Juan A. Pannco de Coronado, San Juan del Bio, Du- range. — Min, Mer XXVII, 1895, num 8 1445a. MoitierOy Matias. Geographical and Statistical Notes on Mexico.

G. P. Putnam’s Sons, New York and London, 1898. 89 28d p. (Geol. ogy and Mining, p. 12-29. )

1446. RoitierOy Blatias* Libre exportaci6n de metales preciosos.

—Prop. Ind. 1875-76, N9 20.

1447. La Mineria en Mexico. — Mem de Haeiendaj 1870. — Min. 3fex.lll,

1875-76, nums. 33 a 41 y 43 a 48.

1448. Una visita a Paclmca y Real del Monte. — 3£in. 3reJt'. VI, 1878-79,

ndm. 48.

1450. Rosa R*, IvUis d.e la, Ingeniero. Informe que sobre la Zona mi-

nera del “ Pehon Blanco” rinde a la Companfa ‘Juarez.” — Bol. Agr. M'w. Nov. 1891, pp. 181-204.

1451. Rosales, Ramoit* Noticia estadistica de las minas y haciendas

argentiferas pertenecientes a la DiputaciOn de Mineria de Pachuca (1874 y 1875). — 3Iin. 3Ier. Ill, 1875-76, numeros 17 y 49

1452. Noticia de las minas de metal de plata pertenecientes a la DiputaciOn

de Minerfa de Pachuca — 3Iin, 3fex. Ill, 1875-76, num 32.

1454. Rutkio, Cesar, Ingeniero de minas. Una nueva extraccion del oro

y de la plata por los cianuros alcalinos. — 3Iin. 3Iex.. XXIX, 1896, nCim. 3.

1455. Riii2! de Velasco, Informe sobre las minas pertenecientes 4 la

Compafna Rosa Maria y anexas (Mineral de Pannco de Coronado, S. Juan del Rio, Durango). — Min 3Ier. XXVI, 1895, nfim. 10.

1456. Ruia Sandoval, Altierto* Criaderos de fierro en Oaxaca. — il/m.

. 3[e'Jt. XII, 1885-86, nOmero 37.

1457. Rtil, Mitiel* El Codigo do Mineria — 3[in J/er. V, 1877-78, nums.

11, 23 y 26.

1462. Porvenir industrial del Mineral de Guanajuato. — BolSoc. O. Ing. II,

1890, nilm. 3, pp. 1-16.

1463. Ruildall, VIT. H. Quicksilver Ores at Guadalcazar. — Sclent. Am.

Sappl XL, 1895, pp, 16289-16290.

1464. Rltxtoil, X'. On the Volcanic Rocks of Northern Mexico. — Journ.

Geol. Soc. VI, 1850, p. 251.

1405, Adventures in Mexico and the Rocky Mountains. — New ed. London

(?) IBGl.

1465a. Ryde, J. R. Griui FundiciOn Central Mexicana. — Aguascalientes.

Trabajos ojecutados durante el afio fiscal de 1896 4 1897. — Bol Agr. 3Hn. Oct. 1897, pp. 51-56, — 3fin 3Ie.\\ XXXV, ndm. 12 (21 Sept. 1899.)

1407. Sa|gra, Ramon de la* Metales preciosos — Bol Soc. Geog. 29* e.

ri, 1870, pp. 98-100.

Es ima estadistica do la producciOn en varies pafses.

1408. Saliag*!!!!, Fray Bernardino de* Ilistoria universal de las

cosas de Nueva Espafla. — M4jico, 1829, 3 t. 89 La publicO tambifm Lord Kiugsborough on el tomo VI de su expl4n- dida colocciOn. Contiene noticias diversas relativas a piedras preciosas y metals.

1469. Saint- Claire, Buport* De la production des m(5taux precieux mi Mexiquo considert'e dans sea rapports avec la Gdologie, la Mdtallur- gie et P Economic politi<iue. — Paris, 1843. 89 y Atlas fol.

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El Sr, Ing. D. Antonio del Castillo public6 extra ctos de parte de esta obra en el 3Iuseo Metkano, III, 1844, pp. 116-119, 241-246 y 481-483 ; IV, pp. 49-53.

1472. Happort sur divers memoires de geologie, par MM. A. Dollfus, E.

de Montserrat, P. Pavie et sur un travail de M. Guillemin. — Arch, Com. Sc, Mexique, III, 1867, pp. 1-9.

1473 . Happort sur les documents scientifiques envoyes par MM. les voya-

geurs de P expedition pour la Geologie. — Arch. Comm, Sc. Me,uque. II, 1867, pp. 2-5.

Hace un breve analisis de las observaciones geologicas liechas en el trayecto de Veracruz a Mexico por los Sres. Dollfus, de Montserrat y Pavie.

1475. Bapport sur divers Mdmoires de Geologie envoyes par MM. Dollfus,

de Montserrat et Pavie. — Arch. Comm Sc. Mexique. II, 1867, pp. 339-346.

1476. Salas, Caspar, Ingeniero. Informe del Sr. Ingeniero presen-*

tado a la Secretaria de Fomento.

Anexo ndm. 5 al optisculo Minas de oro de Batopilas, pp. 43-49.

1477. Informe sobre la Mina ‘‘PurisimaConcepcidn y anexas” (Indd, Du-

rango). — Min. Mex. XXVI, 1895, num. 1.

1478. Salazar, Minerales de oro y plata en Arizona y Sonora. Su benefi-

cio. — Mm. Mex. VI, 1878-79, ndmeros 44 4 50.

1479. La produccibn de oro en 1895. — Min. Mex. XXVIII, 1896, ndmero 13.

1481. Salaaar, leopoldo, Ingeniero de minas. Estiidio de la veta Viz-

caina en la parte que se explota en las minas “San Bafael y anexas.’’ — Mexico, J. J. Terrazas hijo. Imp. 1894. 89 22 p. 2 pianos.

1481a. Proyecto de Beglamento para el servicio de vigilancia oiicial en las

minas de la Eepdblica. Tip. Seer, de Fom. 1900. 9 p.

1482. La intervencibn del Gobierno en los trabajos de las minas. — Ans. Asoc.

Ing. y Arq. V, 1896, pp. 306-314.

1482a. Apuntes sobre el Mineral de Taxco de Alarcbn (Guerrero). — Mem.

Soc. Akate. XVI, 1901, pp. 167-177, Mm. YU.— Min. Mex. XXXIX, ntim. 15 (10 Oct 1901).

1482b. Minas de la Luz, Estado de Guanajuato. — Min. Mex. XXXIV, ndm.

15 (13. Apr. 1899).

1483. Salasar, Bafael. Informe relative alas minas de la Asturiana

(EtzatMn, Jalisco) — Min. Mex. XXVII, 1895, ndmero 11.

1485. Saltmarsli) OF* Extraccibn del oro y la plata de las piritas. —

Mm. Mex. XXVIII, 1896, ndm. 16.

1486. Samson, Alberto* Metalurgia de la plata. — Min. Mex. Ill, 1875-

76, . 11 y 14.

1487. Amalgamacibn y pbrdidas que de ella resultan. — Min. Mex. Ill, 1875-

76, ndm. 16.

1488. Metalurgia del acero. — Mioi. Mex. Ill, 1875-76, ndm. 18.

1488a. Sanclie Apolonio* Las Minas “La Leona’’ y “Cata de Plata” en PJateros, Mineral de Fresnillo. Estado de 55acatecas. — Min. Mex. XXXVII, ndm. 8 (23 Ag. 1900).

1489. Sanclicie; laciOy manitel Ingeniero. Las aguas de Cuernavaca,

Amacusac 4 Iguala. — Bol. Soc. Geog. 2a e. IV, 1872, pp. 127-129.

1490. Sanelieai!; Oclioa, Caspar* El azufre del Popocatepetl.—

Mex XIX, 1891, num. 7. XIX, 1891, ndm 9. XVIIL 3891, ndm. 20. 1492a. Sanebea;, Fedro C. Sistema de Fracturas en el Mineral de Pa- chuca. — Bol Inst. Geol. numeros 7-9, 1897, pp. 83-98.

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1492b. Maquinaria de desagiie en el Mineral de Pacbnca — Bol Im. GeoL

ntameros 7-9, pp. 145-153.

1493a. Castro, C., y Rangel, M. Metalurgia en el Mineral de Pa-

chuca. — Bol. Inst, GeoL niim. 7-9, 1897, pp. 157-183.

1493b. Rangel, M,, y Ooii2i;ale, I. O. Pesena historica del Mi-

neral de Pacbuca. — BoL Inst. GeoL Nos. 7-9, 1897, pp. 9-18.

1494. SandL'berg’er, Rrof. F'. Minerales de mercnrio remitidos de Hu-

itzuco por F. Velten. — Sitz. K, Bayer. Ak. TFiss. Munich, JuL 3, 1875. (Citado por Becker, p. 18-19, Quecksilver deposits, ndm. 156).

1494a. Santa Maria, La Compailfa Consolidada de Minas Auriferas Mexicana, Limitada, (E. de Sonora) y sus interesantes trabajos. — Min. Mer. XXXV, num. 19 (9 Nov. 1899).

1495. Sapper, Ur* Carlos* Sobre la Geografia fisica y la Geologia de

la Peninsula de Yucatiln. — Bol. Inst. Qeol. N9 3, 1896, 57 p. 6 Idms.

1?- parte, Geologia ; Orografia ; 3?* Hidrografia ; 49 Climatografia y distribucidn de las zonas vegetales : Produccibn. Las Hminas son : dos de cortes geolbgicos, 3 mapas hipsomdtricos, de las zonas vege- tales y climatolbgicas, y geologico de los Estados de Chiapas y Tabasco (1: 1 000 000) y Bosquejo Geologico de la Peninsula de Yucatan.

1496. Informe sobre la Geografia Ffsica y la Geologia de los Estados de

Chiapas y Tabasco. — Bol. Agr. Min. Marzo. 1894, pp. 187-211.

1497. Krater-Typen in Mexico und Guatemala, Nach Aufnahmen, 1892

und 1893. — Petermanns Geographische Mittheilmgen. Gotha. Jahr. 1894. taf. 8.

1499. Geology of Chiapas, Tabasco and the Peninsula of Yucatan. (Trans-

lated by C. Joaquina Maury and G. D. Harris). — Journal of Geology Chicago, IV, num. 8, Nov.-Dee. 1896, pp. 938-947.

1499a. Bosquejo Geolbgico de Mdxico, . 4, 5 y 6 des Boletin del In-

stitute Geolbgico de Mexico. 1897 . — OlobuSj Braunschweig, LXXII, niira. 10, Sept. 11, 1897, p. 162.

1508. SayagfO, Fernando, Ensayador. La minerfa en Mexico. — Bol.

Boc. G. Ing. Jal. 1, 1881.

1509. Eegulador de la marcha del beneficio de patio. — Bol. Soe. Ing. Jal. I,

1881, p. 354-356.

1512. Scllirlcs, GttillerittO, Ingeniero de minas. Informe relative a la

negociacibn de minas de San Jos4, E. de Mdxico, y sus haciendas de beneiicio. — Min. Mex. IT, 1874-75, nhm. 42.

1513. Sclileiden, H. Corrospondencia de Mdxico. — NeuesJahrhuch

pp. 33-34.

1514. Correspondencia de Guadalupe y Calvo. — News Jahrbuch 1839, pp.

En ambas cartas se ocupa de asuntos geolbgicos y mineros.

1614a. Scl&nildt, A. Die Silbererzgange von Pacbuca, Mexico. — Zeit. f prak Oeol. 1900, (Mai), pp. 142-143.

1510. Selimitaj, F. J# Geology and Mineral Besources of the Bio Grande

Begion in Texas and Coahuila — Trans. hs. lUin, Eng. XIII, 1885,

pp. 388-405, map,

1617. Scliott, Artltnr# The Cretaceous Basin of the Bio Bravo del Norte.

— JVofi, Am. VIII (Washington), 1865, pp. 272-283,

1518. “ — - Geological Observations on the Pluto-volcanic Slope of the Sierra Madre Along the Azimuth Boundary-Line Through Northwest Sono- ra.— Proe. Am. Aw. X (Albany), 1867, part. 2, pp. 25-60.

666 Bibliography Of Mexican Geology And Mining.

1519. Geology of Lower Colorado Region — Bep. U. S. & iler. Boundary

Survey, I, 1867, part 3, pp. 92-99.

1520. Geological Observations on the Country Along the Boundary-Line

Lying between the One Hundred and Eleventh Degree of Longitude and the Initial Point of the Colorado. — Bep. U. S. & Mex. Boundary Survey, I, 1867, part. 2, pp. 62-77.

1521. Substance of the Sketch of the Geology of the Lower Rio Bravo del

Norte. — Bep. TJ. S. & Mex, Boundary Survey, 1, 1857, part. 2, pp. 28-48.

1522. Die Kiistenbildung des nordlichen Yucatan. — Petennanns Mith. XII,

1866, pp 127-130.

1523. Scliucliard, Carlos* Informe relative al Mineral de Mazapil a

la Jefatura PoHtica del mismo Partido. — Guadalupe, Tip. del Hospi- cio, 1878, 8?, 15 p — i/m. Mex. IX, 1882-83, ntims 48 y 49. XXII, 1893, ntims 9 & 10.

1525. Scliwarz Julius* Formacionea geol6gicas cerca de Tepetongo.—

Neues Jahrbuch, 1834, p. 205.

1526. Segfura, Ouillermo, Ingeniero de minaa. Informe minero pre-

sentado i la Compania de Pachuca y Real del Monte. — i/m. Mex, X, 1583-84, niirn. 49

1528. y Aldasoro, Andres. Informe sobre el Mineral de Sierra

Mojada — Inf. de la Com. exploradora del Mineral de Sierra 3fojada, etc., 1880, pp. 11-18, 3 lams.

1529. Segfura Jose Setiastian, Ingeniero de minas. Mineral de Pa-

chuca — Bol. Soc. Geog. 1®* e. II, 1850, pp. 184-187.

1531. Informe sobre el reconocimiento que hizo del mineral de Guadalupe

Coahuayutla. — Mexico, Imp. M. Murguia, 1850. 8?

1532. Sellerier, Carlos Ingeniero inspector de minas. Compaufa Metal-

tirgica Mexicana. Fundicion de San Luis. Resultado de la visita de inspeccibn practicada a fines de Febrero de 1891. — Bol Agr. Alin. Julio, 1891, pp. 163-170.

1533. Nuevo Leon Smelting, Refining and Manufacturing Co., Limited.

Fundici6n de Monterrey. Resultado de la visita de inspeccion practi- cada a principles de Marzo de 1891. — Bol Agr. Mm. Agosto, 1891, pp.

1534 . Compama Minera, Fundidora y Afinadora de Monterrey. — Bol Agr.

3Im. Agosto, 1891, pp. 141-145.

1535. Informe sobre el asunto promovido por la oposicibn” 4 la posesiOn

del antiguo fundo minero de “Los Remedios,” ubicado en la Munici- palidad de Guadalupe, Estado de Zacatecas. — Bol. Agr. Alin. Sept. 1891, pp. 63-69.

1535 a. Compendio de las unidades de peso antiguas y modernas, usadas en

Mexico para los minerales, metales y productos metaltlrgicos, etc. — Mexico, Tip. Seer. Fom. 1897. fol. 43 p.

1535b. El Mineral de Huitzuco. Mdxico, Tip. Seer. Fom. 1898. 49 p. — An.

Alin. Fom. XI, 1898, pp. 69-112.

1535 c. Data referring to Mexican Mining prepared in view of the participa-

tion of Mexico in the Universal Exposition of Paris in 1900. — Mexico, Hoeck Co., 1901. 140 p.

1535d. Medios md-s convenientes de expresar las leyes de minerales y metales

de acuerdo con el sistema m5trico decimal. — Alin. Mex. XXXIII, nfim. 20 (17 Nov. 1898).

Bibliography Of Mexican Geology And Mining. 66T

1537. ServiM I-acelbroii, Roljerto, Ingeniero inspector de minas.

Informe de la visita de inspeccion practicada en la mina de carbon de- nominada de Fuente, sita en la Municipalidad de Porfirio Diaz, Dis- trito de Bio Grande, Estado de Coahuila. — Bol. Agr, Min. Ag. 1894, pp. 154-163.— Mej. XXVI, 1895, ndm. 9.

1538. Informe relative al estudio del Mineral de Sierra del Carmen, Muni-

cipalidad de Muzqniz, Distrito de Monclova, Estado de Coahuila. — Bol Agr. Min. Sept. 1894, pp. 138-157.— JYk. Mex. XXVI, 1895, num. 13.

1539. Informe relative a la visita de las minas del Malacate (Sultepec,

Mdxico) de la Negociacion del mismo nombre. — Bol Agr. MUi. Sept. 1895, pp. 138-141.

1540. Servilij IvUiS Ingeniero topografo. Informe que presenta a la

Secretaria de Fomento como resultado de la exploracidn de la zona minera en el Mineral de Pregones, Municipalidad de Tetipac, Distrito- de Alarcon, Estado de Guerrero. — Bol Agr. Min. Oct. 1892, pp.

1543. Stieplierdl Alex:. R. Dates relatives a las minas y haciendas de beneficio que posee en el distrito de Batopilas la negociacion que

dirige Bol Agr. 3Iin. Die. 1891, pp. 158-186.

1543a. Las Minas de Batopilas, Chihuahua, Mexico. — Min. Mei. XXXVI,

nfiraeros 19 & 20 (10 & 17 Mayo, 1900).

1543b, Sliufeldt, Robert W., Captain U. S. K. Keports of Explora- tion and Surveys, to Ascertain the Practicability of a Ship Canal be- tween the Atlantic and Pacific Oceans — Washington, 1872, 49 Conti ene una resefia mineralOgica y litolOgica con un mapa del Istmo de Tehuantepec por J. C. Spear.

1548. Siliceo, J 08 e Maria Ingeniero dc minas. Informe de la mina.

titulada el Divine Kostro (alias) la Marmaja, ubicada en el Mineral de Sultepec. — Min. il/cr. I, 1873-74, ntim. 12.

1549. Informc de la mina llamada Conchitla en el Mineral de Sultepec,

cuadrilla de Santo Tomfis. — 3rin. 3fex I, 1873-74, ndmero 12.

1550. Sillixiiaii Itexijaxxiixif Jr. Martite of the Cerro de Mercado,

or Iron Mountain, of Durango, Mexico, and Certain Iron-Ore of Sina- loa. — J. Be. 3d ser. XXIV, 1882 (,2), pp. 376-379, 1 Mm.

1562. Silva Kmilio. El Mineral de Pozos, Estado de Guanajuato. — Min.

Ma\ XXVIII, 1896, nfims. 5, 8, 10, 12, 16, 17, 20 cSi 22. XXIX, nti- meros 1, 3, 9, 14 y 17.

1553, — Guanajuato y Pozos. — Min. Jifex. XXVJIl, nfim. 7.

1563a. — Kl Mineral do Pozos, Guanajuato. — Min. j\fcx. XXX, nilmeros 4, 9 & 20 ; XXXI, ntimeros 3 18 (1897).

16531). — El Mineral de Pozos y los de Charcas y Xichfi. — Mm. Mex. XXXI, num. 8 (U) Ag. 1897).

1553c. Silva, Real del Monte. — Min. Mex. XXX, nilm. 19 (13 Mayo, 1897).

1554. Silva, Martiiiiano, Ingeniero civil y de minas. Memoria sobro'

el Mineral de Mazapil— Guadalupe, Tip, del Ilospicio, 1878. 89 22p.

1555. Silva, Santiago. La NegociaciOn Minera de San Judn de Santa

Eita y anexas (Doctor Arroyo, Nuevo Le6n). — Min. Mex. XXV, 1894, nfimero 17,

1556, Simon, Hr* Ieon. Hidrologfa. Kstudio sobre las aguas del

PefiOn de los Bahos.— Mexico, Escuela N. de Artes y Oficios. 1887. 89 14 p.

Bibliogeaphy Of Mexican Geology And Mining.

1564. Sonneselimidt, Federico. Tratado de la amalgamacidn en

Mexico. — M4xicOj 1805.

Hay otra edicidn, Paris, Imp. David, 1825.

1565. Minas en EspaSa. Tratado del beneficio de sus metales por azogue,

segun el metodo mas comunmente usado en Nueva Espana formado

por Comisario que fue de ellas por S. M. en aquel Bey no Pub-

licado Don Juan L6pez Cancelada, editor que lia sido de la Gaceta de Mjico por el legitimo Gobierno, y de otros periodicos en Espana. Con iicencia del Supremo Consejo de Castilla. — Madrid, Imp. de E. Verges, Diciembre de 1831. 214 p. y el retrato del editor. 89

1566. Mineralogiscli Bescbreibung der vorziiglicbsten Bergwerks — Eeviere

von Mexiko oder IXeue Spanien. Scbleiz, 1804.

1568. Sotintag', Dr. August. Observations on Terrestrial Magnetism in Mexico. Conducted under the direction of Baron von Muller, with notes and illustrations of an examination of the Volcano Popocatepetl and its vicinity. — Smithsonian Contr. to Knowledge. No. 114 fXI, 1859), 84 p.

1572. Sosa y Avila, Francisco, Ingeniero de minas. El Mineral de

Sianori, en Durango. — Min. Mex. XVIII, 1891, num. 17.

1573. Eegion minera de Bacubirito, Estado de Sinaloa. — Min. iiei:. XVIII,

1891, nums. 24 & 25.

1573a. El Torredn, Estado de Coahuila. — Min. Mex, XXXIX, niim. 25 (19

Die, 1901).

1574. Soto, Manuel Femand-O. Distrito Miuero de Pachuca. — Min.

Mex XXI, 1892, nums. 12 & 13.

1575. Soto Mayor, Augustin de. Niieva Espafia. Minas. Beneticio

de metales de plata. — Min. Mex. 1, 1873-74, ndm. 38.

Es un documento del siglo XVI.

1576. Souder, Harrison. Las minas 4 instalaciones de la Compafua

Minera del Carmen, Villaldama (Nuevo Le6n). — Min. Mex. XXTX, 1896, numeros 4 & 5.

1578. Spangenberg:, Fduardo* Eesultados del m4todo de amalga-

macidn alemana con barriles practicado en la Hacienda de Santa Ana

en el Estado de Oaxaca bajo la direcciOn del Sr D — Registro

trimesire, pp. 497-512, ndm. 4, Octubre, 1832.

1578a. Stains, Fnrique. Concentracion de los minerales por inyecciones impulsoras. Ligeros apuntes sobre la antigua y la nueva teorfa de la concentracion. — Min. Mex. XXXV, ndm. 5 (3 Ag. 1899).

1578b. Atomizacidii de las moliendas minerales por medio del aire. — fin,

Mex. XXXV, ntim. 6 (10 Ag. 1899).

1579, Stanton, Ximothy William. Boletfn de la Comisidn Geo-

16gica de Mexico. N9 1 ; Fauna f6sil de la Sierra de Catorce, San Luis Potosi,” by Antonio del Castillo and Jos4 G. Aguilera. (Ee- view) — Jour, of Oeol. Chicago, III, 1895, pp. 858-861.

1580a. Steplian, Cliarles H. Le Mexique 4conomique. Eenseigne- ments pratiques et utiles’ a I’usage des industriels, capitalistes, agricul- teurs, ngociants importateurs et explorateura et des travailleurs. — Paris. 1902. 89 (Chp. IV. Mines).

1581. Stockdalc, A. H. Informe acerca de la zona minera del ‘‘ Oroohe,’* Distrito Andres del Bio, Estado de Chihuahua.— Agr. Min. JuL 1892, pp. 98-106,

1-582. Storcb, J. B. Explotaciones antiguas de minas do oro. — Min. Mex. XXVIII, 1896, nilm. 7,

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1582a. Strittliers, Josepli* Notes on the Mining and Metallurgical In- dustries of Mexico. — Eng. Min. J. LXXII, No. 17, Oct. 26, 1901, pp. 530-539, 7 figs.

1584. SuareiKj Carlos ]B. La Mhieria en el Estado de Yeracruz. — Mn.

3Tex. II, 1874-75, niim. 36.

1585. Sustersic, fernando, Ingeniero de minas. El procedimiento

Patera para el beneficio de metales argentiferos por Lexiviacidn con liiposulfitos. — 3fin. J/e.c. XXVIII, 1896, nums. 1, 2, 4, 7, 11, 12 & 13; XXIX, nums. 8, 15, 16, 17, 23, 21, 25 26.

1586. Snyder, lEiiriciti.e. Mina de las Yedras. Informe rendido por la

Diputacidn de Mineria de Culiacan — Min. Me\. XVII, 1890

1587. Xamtiorrel, Manuel, Ensayador. Informe de la zona minera

concedida en el Mineral de Muzquiz, Estado de Coahuila, al Sr. D. Alejandro Elguerabal. — Bol. Agr 3Im. Feb. 1892, pp. 104-113.

1588- 'Xardy, A. Informe sobre los placeres de oro de Coyuca y el Rio del Oro. — 3Icm. del Gob. del E. de Guerrero, 1887 (Chilpancingo, 1888), pp. CXI-CXIII.

1589. Xaylor, Joliii. On Specimens of Quicksilver-Ore from the Mine San Onofre, Near the Town of El Doctor, Mexico. — Proc. Geol. Soc. II, p. 686. — Phil. Mag. 3d. ser. XIII, p. 386.

1591. OTellez Escalante, Jose La Negociacion Minera El Des-

cubrimiento ” (Pilnuco). — Min. 3rex. XXY, 1894, niim. 22.

1592. TTenne, A. XJeber Gesteine des Cerro de las Navajas (Messer-

berg) in IMexico.— iTeiY Geol. Gesell. XXXYll, 1885, pp. 610-620.

1595. 'Xinoco, Manuel, Ingeniero de minas. NegociaciOn Minera de

Oamon y comp. La. — Mina Ley. — 3Iin. 3[ei. I, 1873-74, num. 35.

1596. Informc aceroa de la mina “Los Estradas” Distrito de Temascalte-

pec, Estado do Mexico. — 3[in. 3Ie.\\ XXIII, 1893, niim. 9.

X 5 () 7 , Informc presen tado al Presidente de la Junta Directi va de las minas

“Aurora y Anexas,” ubicadas en el Distrito de Mina, del Estado de (hicrrero. — Ylcxico, “ Imprenta Gante,” 1893 89 24 p. 2 pianos.

1598. Informe de la mina “ San Felipe” y anexas, Partido de Tamazula.

Estado do Durango. — Durango, Imprenta de la Mariposa. 1894. 89 12 p. 2 1)1.— Bol. Agr. J/m. Die. 1894, pp 121-135.

1599. Estudio del Distrito Mineral de San Andris de la Sierra, Partido de

Santiago PapaS(|uiaro, Plstado de Durango. — Bol, Agr. Min. Enero, 1895, pp. 95““146.

1599a. Informo acora, de Distrito Mineral de Santa Agueda. (Mulege, Baja Oalifornia).— IVIexico, Tipografia Literaria. 1885. 89 30 p. y 2 pianos. 15901). — — “ El lavado de rooa aurffera. Informe del 15 de October de 1892. — Min. Mex. XXXVJ, nAms. 2 3 (ll dc 18 Ene. 1900.

1601. 'Tolsa, Jose Maria* Informo sobre las minas de plala y azogne llamadas “Nogrilla” y “ Santa Gertrudis ” (E, de Guerrero). — Prop, hnl 1875-76. N9 20.

1603, Topf, HtigfO* Informe relative al estudio de los terrenos carbonlfe-

ros del rfo Quilate. — Mem. del Gob. del E. de Femerns, 1888-90, pp. 213- 215.— il/m. 3Iex. XVIU, 1891, nAm. 10.

1604. Toriiel y AlUfara, Mamiel, Ingeniero de minas. ExportaciOn

de miueralos dc cobro.— Mus. JSfae. I, 1877, pp. 112-116.

1607. Xorreiite, Mariano, (kograffa Universal flsica, polltica 6 his- tArica, dedicada al Exemo. Sr. Duque de S. Carlos.— Madrid, Miguel de Burgos, 1827-28, 2 t. fob y mapas.

670 Bibliography Of Mexican Geology And Mining.

Da la descripci6n fisica de Mexico, con noticias de sus minas j su& productos.

1608. Historia de la Revolucion hispano-americana — Madrid, Leon Ama-

rita, 1829-1830, 3 t. con cartas y pianos.

Se hallan noticias relativas a las minas de Mexico, la prodiicciOn de metales, acunacion, etc

1609. TTorres Garcia, DomingfO. Informe relative d los dep6sitos de

asfalto pitholium en el Estado de Jalisco. — Min. 3Iex. XI, 1884, ndm.

1610. 'Torres, TuiS K. La Negociacion Minera de Promontories, Alamos,

Sonora. — Min. Mec. V, 1877-78, niims. 21 y 22.

1612. Torres, Tomas, Ingeniero. Inforrne rendido, el 30 de Abril de 1889, sobre las minas “Cuauhtemoc” y “Xopalera,” ubicadas al pie de la montaha aurifera denominado “Cerro Colorado,” en Batopilas, Cantbn “Andres del Eio,” en el Estado de Chihuahua.

1617. Tuttle, Ei. G. The Sabinas Coal-Field. — Eng. & J/m. Jour. LVIII,

1894, p 390-892.

1618. Tyler, Carlos M. Los placeres de Sonora. — Mm J/dt. XIX, 1891,

mini 2.

1619. tJlloa, Ambrosio, Ingeniero Apuntes sobre la Legislacibn de

Mineria en el Estado de Jalisco. — Bol. Soc. lug Jal II, 1882, pp. 65-69. —1/m. 1/ex IX, 1882-83, ntim. 14

1620. Undiano, Tic. J. M. Cuestion Minero-LegaL— l/i/i. 1/ex. VIII,

1621. tJriarte, Ramon, Ministro de Guatemala en Mexico. Informe so-

bre los terremotos acaecidos en Centro America. — Bol. Soc. Oeog. ep. II, 1874r-75, pp. 189-195. — 1/m. 1/er. II, 1874-75, ndm. 51.

1625. Crquiza, Manuel, Ingeniero de minas. Michoaerm. Informe del Ingeniero encargado de reconocer la Sierra de Ucareo, para averiguar las probabilidades de una eruption volcanica. — Bol. Soc. Geog. 2?* e. IV, 1872, pp. 586-588.

1026. Exploracibn del Distrito de Coalcomhn, Estado de Michoacitn. —

Mexico, Tip. Lit. de F. Mata, 1883. 84 p. 89 1 piano y 1 Ifimina. — Ans. 1/. F. VII, pp. 195-261, 4 Lims. y 1 piano. — 1/m. 1/dr. X, 1883-84.

1627. Uslar, Guillermo de, Ingeniero de minas. El procedimiento

Ortega. — 1/m. 1/dc. XXII, 1893, niim. 23.

Es un informe relative al metodo de beneficio del Ingeniero Manuel Valerio Ortega.

1628. Valero, Antonio* Informe de la Zona Minera de Bravos y Tava-

res, Guerrero. — Bol. Agr. 1/m. Jul. 1893, pp. 241-258.

1629. Vallarta, Tie* Ignacio T. Votos del C Presidente de

la Snprema Corte de Justicia en los negocios mas notables. — Mdxico, Imp. F. Diaz de Le6n, 4 tomos, 89 1878-1883.

Contiene varies importantes estudios de Legislaci6n Minei-a.

1630. El Proyecto del C6digo de Mineria. Dictamen sobre el C6(Hg() de

Mineria de la Rephblica Mexicana emitido per Comisionado

especial del Gobierno del Estado de Sinaloa. — M<§xico, Imp. Polfglota, 1884, 89 60 p.

1631. Alegato presentado it la Supreraa Corte de Justicia por pidiendo

la revocacidn del auto de sobreseimiento pronunciado por el Juez de

Bibliogkaphy Of Mexican Geology And Mining. 671

Distrito de G-uanajuato enel amparo interpuesto por los duenos de las Salinas del Tapado, contra los actos del Juez de Distrito de San Luis Potosi. — M<xicOj Imp. F. Diaz de Le6n, 1885. 89 70 p.

1632. Tarela Salceda Joaquin, Profesor de Historia Natural en el

Colegio Militar. Algunas observaciones relativas a un caso de oro native en granite de Sonora. — Mem. Soc. Abate. IX, 1895-96, pp.

1633. Vasquea?, Kran cisco 10t. Estudios sobre el C6digo de Mineria. —

3Im. 3Iex. XVI, 1890, . 1 a 5.

1634. Vclain, Cll Geologia. Una excursion al volcan de la Eeunidn. —

3Ii7i. 3Iex. V, 1877-78, niim. 7.

1635. Velasco, Jose F'* Estadistica de Sonora. — BoL Soc. Geog. dp.

Xi, 1865,

Mineria, pp. 43-55 ; Minerales que se trabajan actualmente, 56-66 ; Minas de fierro, plomo, cobre y azogue, 66-68 ; De otras substancias minerales y piedras de estimacibn, 68-73.

1636. Velaque35 Cardenas y Ceon, Joaquin, Primer Director

General de Mineria. Nuevas ordenanzas de minas, propuestas y for- madas de 6rden de S. M. que Dios guarde, por el Real Tribunal del Importante cuerpo de la Mineria de Nueva Espana. Con notas puestas

por el Sr. Licenciado Director general de dicho Importante

cuerpo, del Consejo de S. M., Alcalde de Corte lionorario de esta Real Audiencia. Mdxico. Afio de 1778.

1037. Notas a las nuevas Ordenanzas de Minas puestas para su major inteli-

gencia por el Sr. Don — Mexico, Imp. y Zapiain. 1875.

89 152 p. Edicibn de El Propagador Industrial.’

1639. Vclaatquee de Ceon, Joaquin, Director del Colegio Nacional

de Minerfa, Ministro de Fomento, etc. Discurso pronunciado en la apertura de la Catedra de Geologia del Colegio de Mineria. (Marzo 18 de 1844 ). — lU 3fmeo 3Texlcan<), III, pp. 205-208.

1640. Oatedras de Geologia y Zoolog la. Discurso del Professor el Coro-

nel Dfa 15 de Noviembre de 1845. — An. Col. 3[m. 1845, pp.

38-47.— 3rex. VIII.

1641. Discurso pronuncido por el C<4tedratico de Geologia y Zoologla

el dfa 17 de Noviembre de 1848, en el acto ptiblico de esta materia en el (’olegio de Mineria. — An. Co}. 3rin. 1848,* pp. 73-81. — 3Im. 3fex.

vni.

1642. — Cortes Geolbgicos.— JM Soc. Geog. dp. I, 1849, pp. 110-112. .

1643. — — La Oaverna de Cacahuamilpa. — A/m. Mex. VIII, 1881-82, nd-

mero 50.

1644. y Serrano, Kgnacio* Nevado de Toluca. — Bol, Soc. Qeog.

W 6p. I, pp. 138-141.

1645. Vclaajqnteaj die leon, Migfuel, Tngeniero de minas. Corte

geolOgico en el Mineral del Fresnillo. — Bol. Soc. Geog. 6p. I, 1849, pp. 244-249.— A/wk Mex-. IX, nCim. 3.

1647. — — Preparacibu mecdnica de los minerales de plata en la negociacibn de

minas del Fresnillo en 1857, por Professor de Metalurgla y

AnUlisis QuCmica en la Escuela Prictica de Minas. — Ans. 3Iex. (7. 1860, pp. 11-38 133-174, 9 14ma. 1 vista y 4 cuadros.

1648. Andlisis del aire de las minas. — Am. 3fex. 0. 1860, pp. 177-192.

1660. “ — - Mineral del Fresnillo. Trasporte de 4 carga de las minas 4 la Haci- enda Nueva. — Am A/m, 3fex. I, pp. 281-294.

YOL. XXXI r.— 40

672 Bibliogeaphy Of Mexican Geology And Mining.

1651 . A Notice of tLe Mining District of Asientos de Ibarra in the State

of Aguascalientes, Mexico. — Mexico, J. V. Villada, 1881, 23 p & 2 pianos. 89—3/m. Mex. VIII, 1881-82.

1652. La Mineria en el Estado de Aguascalientes.— 3/m. Mex. VIII

1881-82, ntim. 41.

1653. Distrito Minero de Asientos y Tepezala en el Partido de Asientos

del Estado de Aguascalientes. — Min. Mex. X, 1883-84, ndm. 20.

1655. La Bamirita. Nueva especie mineral dedicada al Sr. Ingeniero de

minas D. Santiago Bamirez, descubierta, descrita y analizada por el

Profesor mexicano Mexico, Tip. Secretaria de Fomento, 1885,

32 p. 89 1 retrato y una lam.

1656. y Calderon, Melclior. Compama Bestauradora. Informes

referentes al Distrito Minero de Asientos de Ibarra, Estado de Aguas-

calientes. Escritos por los Senores Ingenieros — Mexico, Imp.

G-. Martinez. 1894. 89 32 p.

1658. Velten & Celimann. Cinabrio metamorfico de Huitzuco. — Sitz. K. Bayer. Ak. TFiss. Munich, II, 1867, p. 202.

(Citado por Becker, p. 18, Quecksilver deposits, ndm. 156).

1658a. Velex, Ismael. Minerales del Distrito de Coalcoman, Michoacitn. — Min. Mex. XXXIIl, num. 7 (18 Ag. 1898).

1658b. Biquezas ignoradas del Distrito de Coalcoman, Michoacan. — Min. Mex.

XXXIV, niim. 15 (13 Abr. 1899).

1663a. Viele, M. A. Notes on Hydro-Electric Development Becently Com- pleted Near Guadalajara, Mexico. — Eng. Min. J. LXXII, No. 24, Dec. 14, 1901, p. 781.

1666. Tillada, Dr. Manuel M., Profesor en el Museo Nacional.

Besumen de una parte del estudio de los Sres. A. Dollfus y E. Mont- serrat sobre el Distrito de Sultepec, con algunas adiciones. — Nat. ser. I, 1887, pp. 36-39, 1 lam.

1668. Kelacibn de un viaje a la Caverna de Cacahuamilpa. — Nat. ser. I,

1887, pp. 148-156. 1 Hmina.

1 669. Apuntes de Geologia y de Botanica relatives M6xico . — Nat ser. I,

pp. 419-433, 493-498. 3 lams.

Se ociipa de las erupciones de agua termal en el Estado de Michoa- c4n,‘ del cerro de Curutaran (Jacona) y del Nevado de Toluca.

1670. Noticia y explicaciOn de la Carta Geol6gica de los Valles de M.xico

y Toluca y cordilleras limitrofes. — Nat. 24 ser. I, pp. 483-484. 1 Kim. (La carta es la reproduccibn de la editada por Egloflfstein).

1671. La variedad mis notable de granate mexicano. — Nat, 24 ser. I, pp.

1674. Villafana, Jose, Ingeniero de minas. Plano general del Mineral

de Pozos. 1896.

1674a. Informe 6, la Junta Directiva de la Compafiia Minera Anbnima de

Angustias, presentado k la Junta General verificada el 29 de Elnero de 1898 en la ciudad de San Luis Potost — S. Lufs Potosi, Tip. de la Esc. Ind. Militar. 1898. 89 25 p.

1675. Villanueva, Bartolome Xeodiora, Ingeniero. Distrito y

Beal de Minas de Sultepec. Informe sobre el reconocimiento practi- cado en dicho Distrito. — M6xico, Tip. Secretaria de Fomento, 1888. 89 43 p,

1675a. Villarollo, J. D. Informe al Consejo de Administracibn de laCom- panla Minera ‘"El Calvario,’ Noxtepec, Guerrero.— Mexico, E. Mur- gula. 1898. 89 17 p. 1 piano (1:1 000).

Eibliography Of Mexican Geolog-Y And Mining. 673

1675b. Informe reliitivo la Mina “La Trinidad” ubicada en el Mineral

de Pozos, Estado de Guanajuato. — Mexico, Imp S. Corazbn de Jesus. 1898. 89 16 p. 2 pianos (1: 2000).

1675c. j Bose, E. Criaderos de fierro de la Hacienda de Vaquerias,

Hidalgo. — Bol List Geol. No. 16, 1902, pp. 15-44, 4 lams.

1676. Villasenor, QregfOria Informe de la Zona Minera de Ala- meda, Sonora. — Bol. Agr. Min. Enero, 1893, pp. 220-241.

1681. Virlet d’Aowst, Xlieodore. Coup d’ oeil general sur la topogra- phie et la geologie dii Mexique et de I’Amerique centrale. — Bull. Soc. Giol France. sem. XXIII (1866), pp. 14-50.

1634. J)q Ibige gologique de quelques filons mtalliques et en particulier

des filons de mercure. Note de M prsente par M. Daubree.

(Extrait). — C. B. LXXXIII, 1876, sem. pp. 289-291.

1685. Sur les salines differentes et les diffdrents degrs de salure de certains

lacs du Mexique. — BtdL Soc. Geol. France. 2® sem. XXIT, 1865, pp.

16S7a. 'Ward, Mexico in 1827. 2 vols. London, 1828. Henry Col-

burn. This is an official report to the British Government by the author, who was her Majesty’s Charge d’Afiairs in Mexico from 1825- 1827. Next to Baron Plumboldt’s work it is the most elaborate work on the resources of New Spain in the English language. It treats very fully of the precious metals.

1688. Ward, Iester JFm The Geographical Distribution of Fossil Plants.

— Bep. U. S. Geol. Survey. VIII, 3886-87, II, p. 665-960.

Da cuenta, pp. 825-826, de los estudios de plantas fosiles de Mexico, hechos por Fontaine (v. ntim. 542), Lesquereux (915) y Newberry (3097).

1689. Waring, W. Oeorgfe- La hidrometalurgia del oro y la plata. —

Min. Mtx XXVIII, 1896, ntims. 23 & 24.

1689a. The Gold-Field of Altar, Sonora. — Eng. Min. J. LXIII, 1897, pp.

257-258. — Min. Mer. XXX, ntim. 13 (1 Abr. 1897).

1691. Wetier, Br# Note sur des ossements fossiles trouvfes dans le nord-

cst du Mexique. — Arch. Comm. Sc. Ill, 1867, pp. 56-61.

1692. Welder, ISPicolaS. Informe 4 la Secretarla de Fomento sobre la

Zona minera, Partido de Ocampo, Estado de Aguascalientes. — Bol Agr. Min. Marzo, 1892, pp. 61-84.

1694. Weidiier, Kederico O. Informe cientlfico sobre el cerro de Mer- cado de Durango, 6 noticias mineralOgicas, geognOsticas, estadisticas, luHtOricas y metalfirgicas de dicho cerro y de la Ferrer fa de S. Fran- cisco, presentadas al Gobierno del Estado por el Irigeniero del mismo,

en 6 de Enero de 1858. — Bol. Soc. Geog. 6p. VI, 1858, pp,

En Am. M, F. Ill, 1878, p. 156-182, se pnblicO una segunda edi- ci6n con adiciones y correcciones por el autor y con iin corte geolOgico.

31(31* mexikanisohe Staat Sinaloa. — Petermanm Miith. XXX, 1884, pp. 1-9, map.

109, The Topography, Ethnography and the Natural and Mineral Be-

sources of Sinaloa. Bead before ilie Geographic Society of the Pacific, November, 188L— San Francisco, 1882.

1697. Wendt, Artliiir F. The Copper-Ores of the Southwest.— Traas. Am, Im, Min. Eng. XV, 1887, pp. 25-27.

Describe las formaciones de Muleg5, Baja California.

674 BIBLIOaRAPHY OP MEXICAN GEOLOCT AND MINING,

1698. West, Cr* B., Ingeniero de minas. Informe sobre la zona minera Ta- pilula, ubicada en, el Departamento de Picliucalco, del Estado de Chia- pas. — Bol, Agr. Min. Marzo 1893, pp. 157-162.

1700a. wiieeler, Walter. El Mineral de cobre del “Magistral,” Can- t6n de Ameca, Jalisco. — 3En, Mex. XXXIV, num. 5 (2 Feb. 1899).

1701. Wllitlie, Hr. Cliarles A. Late observations concerning the Mol-

luscan Fauna and the geographical extent of the Laramie group. — Am. J. Sc. 3d. ser. XXV, 1883, pp. 207-209.

Eefiere el descubrimiento de fosiles de ese grupo en el Estado de Nuevo Le6n.

1702. On the Mesozoic and Cenozoic Paleontology of California. — Bull. ZL

S. Geol. Sumey. No. 15, 1885.

Kefiere algunas especies del Cretaceo de la Bahia de Todos Santos, Baja California.

1703. On New Cretaceous Fossils from California. — Bull. U. S. Geol. Survey.

No. 22, 1885.

Las especies descritas son de la Bahia de Todos Santos, Baja Cali- fornia.

1704. On the Age of the Coal Found in theEegion Traversed by the Bio

Grande.—Am. J. Sc. 3d. Ser. XXXIII, 1887, pp. 18-20.

Describe la formacion Laramie que se halla en la parte de Mexico.

1705. On the Relation of the Laramie Group to Earlier and Later For-

mations. — Am. J. Sc. 3d. Ser. XXXV, 1888, pp. 432-438.

Se ocupa de las relaciones del Laramie de las regiones de M6xico y Tejas.

1706. The Lower Cretaceous of the Southwest and its Relation to the Un-

derlying and Overlying Formations. — Am. J. Sc. 3d. Ser. XXXVIII, 1889, pp. 440-445.

Estudia la referida formacion en Tejas y el norte de Mexico.

1707. Remarks on the Cretaceous of Northern Mexico. — (Abstract). — Proe,

Am. A. A. Sc. XXXVIII (Toronto), 1889, p. 252.

1711. Williams, Albert, Jr# Mineral Resources of the United States.

— U. S. Geological Survey. Washington. 8? 1882-84.

Mexico : 1883-84 ; antimony, p. 645 ; copper, 356 <fe 373 ; lead, 440 ; mining law, 999 ; tin, 623. — 1885 ; copper, 233.

Para los aiios siguientes v6ase Day (D. T.).

1712. El povenir de la mineria de la plata. — 3En. Alex. XXV, 1894, nurus..

24 & 25. -

1715. Williams, C. Rule# El desagiie de San Rafael (Pachua). — Min.

Mex. XXVIII, 1896, ndm. 1.

1715a. Wilson, Herbert M. Topography of Mexico. — Am. Geogr. Soc.

Bull. Vol. XXIX, pp. 249-260, with map. 1897. Review by W. M. Davis, Seiencey new ser., Vol. VII, p. 125, 1898.

1716. Wisli2;enus, A. Geological Sketch of a Tour from Independence to

Santa F4, Chihuahua, Monterey and Matamoros. Se halla en “Me- moir of a tour to Northern Mexico, connected with Colonel Doni- phan’s expedition in 1846 and 1847. V Washington, 1848, 141 p. 3 maps.

1716a. Wray, Henry Susell* Unwatering Former Bonanza Mines at Guanajuato.— Min. J. LXXHI, No. 18, May 3, 1902, p. 612, 3 figs#

Bibliography Of Mexican Geology And Mining. 675

1719. Xiaiieiiejc, J. A. El Fenix de los mineros Eicos de la America.

Funebre parentacion (sic) del caballero Don Joseph de la Borda. — Mexico, 1779. 89 50 p.

1720. 27arate) Francisco de P., Ingeniero de minas. Minas de Som-

brerete. Informe dirigido al Sehor Gobernador del Estado de Zacate- cas. — Min. Mex: I, 1874, num. 30.

1721. Informe que sobre las minas de la NegociaciOn de San Kafael rinde

— Zacatecas, Imp. Sucursal de la EconOmica, 1882, 89 22 p.

1722. Apuntes sobre la Mineria del Estado de Zacatecas que por disposi-

cion del Ejecutivo del mismo ha formado —Zacatecas, Imp. del

Hospicio, en Guadalupe, 1884. 89 98 p. — Min. Met. XI, 1884.

1723. y Floresi, Forename, Ingenieros de minas. Informe sobre el

reconocimiento de los criaderos de mercurio de Guadalctor, Santa Maria del Quiote, La Tapona y Coronado. — 3Im. Mex. II, 1874-75, niimero 41.

1724. ayas Fnriquea:, R.* de# Los Estados Unidos Mexicanos. Sus

condiciones naturales y sus elementos de prosperidad. Obra escrita

por y publicada por orden de la Secretana de Fomento, Colo-

nizaciOn (5 Industria de la Eepliblica Mex icana. —Mexico, Tip. de la Se- cretaria de Fomento, 1893. fob 479 p.

I. Gonfiguracion y aspecto fisico, montahas, volcanes, altimetrfa, cuencas liidrogrdficas, barrancas, etc., pp. 9-48.

IT. Geologfa, opiniones de Humboldt y de Virlet dLAoust, Tiempos geolOgicos, estudio litolOgico, apuntes sobre geonenia, el Valle de Mexico, pp. 49-68.

III. Los volcanes, volcanes estratificados, Popocatepetl, Citlaltepetl, Volciin de Colima, Nevado de Toluca, Cebonico, San Martin, Jorullo, Tacanji, Volcim de las Yirgenes, pp. 69-97.

IV. Volcanes homogneos, geysers y fumarolas, aguaa termales y minerales, terremotos y erupciones, pp. 99-135.

V. Mineralogia, las regiones metaliferas, asientos principales de minas, principales productos minerales, lista de las minas, acunacibn habida en las Casas de Moneda, desde su fundacibn hasta 1889, pp.

1724a. eliada Balden eliro A. Extract© de un informe sobre el Mineral de Copalquin en el Estado de Durango. —Min. Mex. XXXIV, nbm. 5 (2 Feb. 1899).

1 724b. — — La concentracibn de minerales. i Sen'm b no concentrables los metales del Mineral de Angangueo? Dictamen pericial. — Min. Mex. XXXIV, nbm. 17 (27 Abr. 1899).

1724c, Algunas fundiciones del Mineral de Angangueo, Michoacfin.-— 1/wi.

Mex. XXXI V, n. 13 (30 Mar. 1899).

1725. elayeta, Manuel de. Minas de la Baja California. Belacibn

quo manihesta las minas existentes en este Territorio, de que tiene conocimionto el Gobierno y Comandancia militar del mismo, segun consta de los libros respectivos, con expresibn de las materias de que se componen.— jTM /Sbc. Geor/. 34 bp. I, 1873, pp. 447 448.

676 BIBLIOaRAPHY OF MEXICAN aBOLOOY AND MINING.

III. Principal Localities Mentioned in the Bibliocraphy.

Acachuane, Durango, 543a.

Acatto, Puebla, 1308.

Aduana, Sonora, 75a.

Aguacaliente, Chihuahua, 993a. Aguascalientes, Estado de, 101, 667, 1043a, 1169a, 1388b, 1465a, 1652. Ajuchitln, G-uerrero, 767.

Ajusco, Mdxico, 994a.

Alameda, Sonora, 1676.

Alamo, Eancho del, Sonora, 31,

Alamos, Sonora, 1046, 1610. Albadelista, Guerrero, 9.

Altar, Sonora, 776c, 908a, 1689a. Amacusac, Guerrero, 1489.

Ameca, Jalisco, 129, 381b, 1700a.

Ana (Santa), Oaxaca, 305a, 1578. Analco, Jalisco, 886.

Andres (San) de la Sierra, Durango, 33,

Angangueo, Michoacan, 1724b, 1724c. Aragon, Distrito Federal, 1016. Aranjuez, Jalisco, 1243a.

Arevalo, Hidalgo, 607.

Ario, Michoactin, 233a, 1010.

Arizpe, Sonora, 776a, 776b, 873a. Arperos, Guanajuato.

Arrastrados, Jalisco, 1243a.

Asientos, Aguascalientes, 471, 667, 1651, 1653, 1656.

Asuncion, Oaxaca, 969.

Atotonilco el Chico, Hidalgo. See Chkoj Mineral del.

AutKm, Jalisco, 1180.

Ayino, Durango, 994b.

Baca Ortiz, Durango, 736, 1085a. Bacnbirito, Sinaloa, 1573.

Baja California, 200a, 269, 283, 293b, 456, 456a, 466b, 532, 562, 565, 680, 922, 923, 924, 951a, 1013a, 1020, 1022a, 1023, 1110, 1124, 1166, 1188a, 1365, 1416, 1437, 1725.

Baltasar (San), Oaxaca, 969.

Baos, Chihuahua, 204.

Batopilas, Chihuahua, 196a, 662, 678, 773, 1073, 1367a, 1476, 1543, 1543a,

Bernalejo, San Luis Potosl, 198, 589,

Bocas (San Jose de las), Sinaloa, 1075, Bolafiitos (La Luz\ Guanajuato, 766. Bolanos, Jalisco, 765.

Boleo, Baja California, 183b, 186, 552, 846a, 846b, 997b.

Bols6n de Mapimi, Durango, 481. Bravos, Guerrero, 1628.

Breha (Pedregal de la), Durango, 1247. Buenaventura (San), Coahuila, 1362. Buena Vista, Coahuila, 1069.

Bufa de Mascota, Jalisco, 895.

Cacacbilas, Baja California, 697. Cacahuaniilpa (Caverna de), 99, 221, 586, 890, 1237, 1643, 1668.

Cacaria, Durango, 534d.

Calamahi, Baja California, 177a, 995,

Caleras (Eancho de las), Guanajuato,

Campechana, Guanajuato, 1324.

Canelas, Durango, 734.

Cantera, Zacatecas, 592.

Cardonal, Hidalgo, 876.

Carlos (San), Tamaulipas, 373.

Carmen (Sierra del), Coahuila, 932a,

CJarrizo, Chihuahua, 795a.

Catorce, San Luis Potosi, 18g, 85a, 385, 589, 841, 940, 941, 943, 1157, 1366,

I 1367, 1579-

: Cebornco (Volcim de), Jalisco, 87, 96,

! 120, 240, 895, 1724.

Cedral, San Luis Potosi, 241a.

Cedi-os (Isla de), Baja California, 716. Cerro Blanco, Sonora, 181.

Cerro Colorado, Chihuahua, 500a, 678,

Clara (Santa), Baja California, 885. Coahuila, Estado de, 348, 415, 445, 548, 549, 550, 596, 837b, 1070a, 1320, 1516. Coalcomfin, Michoaciin, 62, 539, 1626, 1658a, 1658b.

Cofre de Perote, Veracruz, 895, 1418. Colima, Volciui de, 260, 895, 1724. Colima, Estado de, 88, 337.

Comanja, Jalisco, 380, 1324.

Coneto, Durango, 192,

Copala, Sinaloa;, 761,

Bibliouraphy Of Mexican Geolog-Y And Mining. 677

Copalqiun, Durango, 205a, 543b, 543c, 1724a.

Ooqiiillo, Guerrero, 918.

Coronado, San Luis Potosl, 1723. Coronados, San Luis Potosi, 150. Corralitos, Chihiiabua, 759.

CosaKi, Sinaloa, 376.

Cosihuiriachic, Chihuahua, 653.

Coyuca, Guerrero, 296, 1588.

Oristo (Mina del), Veracruz, 827.

Cuale, Jalisco, 1243a.

Cuernavaca, Morelos, 1489.

Ouitlanapa, Guerrero, 1292.

Curutaran (Cerro de), Michoacan, 1669. Cutzamala, Guerrero, 179.

Chalchihuites, Zacatecas, 249, 515. Charcas, San Luis Potosi, 589, 987, 1553b.

Chiapas, Estado de, 1496, 1497, 1498,

Chiautla, Puebla, 1308.

Chico (Mineral del), Hidalgo, 955, 985. Chihuahua, Estado de, 84a, 153, 155, 2()4a, 3Sla, 440, 580, 623, 025, 638, 837b, 1100, 1224, 1716.

Chilpancingo, Guerrero, 1041e, 1063. Chinipas, C-hiliuahua, 195.

Churruca, San Luis Potosi, 947. Churnica, Zacatecas, 648, 945.

Descubridora, San Luis Potosi, 1727,

Desmoronado, Jalisco, 1243a.

Distrito, Federal, 927, 1593, 1763. Doctor, Quoivtaro, 90, 1589.

Doctor Arroyo, Nuevo IjcOn, 1555. Durango, Estsulo de, 204a, 205, 481a, 561a, 709a, 804, 823a, 836, 1247, 1248,

Durazno, Sonora, 1032.

El Oro, MMcih 672a, 10691), 1069c. Esperanzas, Coalmila, 953a.

Ktla, Oaxaca, 970.

Etznthui, Oaxaca, 1065a,

Eulalia (Santa Chihuahua, 578, 660.

Francisco del Mezqiiital (San), Durango, 406, 1026.

Francisco ( Zona de San ), Zacatecas, 50. Fi'csnillo, Zacatecas, 72, 86, 1076, 1154, 1185, 1424, 1488a, 1645, 1647, 1650.

Geiser de San Andres, Michoacan, 895.

Gigante, Guanajuato, 569.

Guadalajara, Jalisco, 132, 133, 1663a.

Guadalczar, San Luis Potosi, 128, 156, 313, 589, 664, 1293, 1364, 1463, 1723.

Guadalupe y Calvo, Chihuahua, 654, 1096, 1096a, 1514.

Guadalupe Coahuayutla, Guerrero, 535, 758, 1105, 1531.

Guadalupe Hidalgo, Distrito Federal, 1034a.

Guadalupe, Zacatecas, 1535.

Guadalupe de los Eeyes, Oaxaca, 962.

Guadalupe (Sierra de), Distrito Federal, 1230, 1231.

Guanajuato, 27, 60, 158, 220, 351, 352, 353, 363, 424, 515a, 602, 616, 816, 948, 949a, 976, 1158, 1250, 1379, 1427, 1431, 1437, 1462, 1553, 1716a.

Guanacevi, Durango, 316a, 952a, 1356.

Guaymas, Sonora, 445f.

Guerrero, Estado de, 68, 755, 857, 859d, 988, 1597, 1601.

Hermosillo, Sonora, 25, 1048.

Hidalgo, Estado de, 100, 479, 847.

Hidalgo del Parral, Chihuahua, 77a, 437, 609a, 659,

Hondo, Coahuila, 534a.

Huachinango, Jalisco, 1243a.

Huajicori, Tepic, 6a.

Huautla, Morelos, 1122.

Huaxteca, 223, 829, 830.

Hnetamo, Michoaciin, 208, 1272, 1298,

Huitzuco, Guerrero, 156, 709c, 978, 1070, 1494, 15351), 1658.

Ibara, Baja California, 1013a.

Iguala, Guerrero, 1489.

IndC‘, Durango, 1477.

Inguarlin, Michoacfin, 369a, 1228a.

Ixtaccfhuatl, 492a, 895, 1133.

Ixtapalapa, Distrito Federal, 1233.

Ixtlahnaca, M6xico, 1353.

Ixtlan, Oaxaca, 971.

Jacala, Hidalgo, 93, 113, 114, 345,

Jalapa, Veracruz, 571, 1120, 1318, 1418.

Jalisco, Estado de, 133, 146, 147, 682, 755, 795, 879, 1437, 1609, 1619.

Jesus Marfa, Cliihualiua, 655.

678 Bibliography Of Mexican Geology And Mining.

JimulcOj CoaLuila, 1139a.

Jolapa, Jalisco, 1243a.

Jorullo, Michoacan, 208, 895, 1010, 1385, 1724.

Jose (San), Mexico, 1512.

Josfe del Oro (San), Hidalgo, 568.

Juan de los Lagos (San), Jalisco, 444.

Le6n, Guanajuato, 446a.

Lorenzo (San), Sinaloa, 1208.

Los Eeyes, Jalisco, 1243a.

Lower California. See Baja California. Luis (San), Chihualiua, 986.

Luis Potosi (San), Estado de, 589, 625, 709a, 1437, 1532.

Luz (La), Guanajuato, 12, 1482b.

Magistral, Jalisco, 1700a.

Maiz, San Luis Potosi, 637.

Mapimi, Durango, 481b.

Maria del Quiote (Santa), San Luis Po* tosi, 1723.

Marfa del Efo (Santa), San Luis Potosi,

Mascota, Jalisco, 1243a.

Matamoros, Chiliuabua, 661.

Malamoros Izlicar, Puebla, 510, 1308. Matamoros, Tamaulipas, 1716. Matebuala, San Luis Potosi, 589, 984. Mazapil, Zacatecas, 2, 835, 1076, 1080, 1523, 1554.

Mellado, Guanajuato, 1379.

Mercado (Cerro de), Durango, 169, 170, 171, 1247, 1248, 1367c, 1550, 1694. Mesa de Santiago, Chihuahua, 930a. Mexico, Estado de, 1284.

Mezquital del Oro, Zacatecas, 309, 536,

Michoac5;n, Estado de, 67, 208, 228a, 421, 713, 910, 1011, 1215, 1442, 1669. Miguel de lasPeras (San), Oaxaca, 613. Mina, Chihuahua, 1095a.

Mineral del Oro, Mexico, 666, 1252, 1255, 1291.

Moctezunaa, Sonora, 1024a.

Molango, Hidalgo, 497.

Monclova, Coahuila, 755.

Monterrey, Nuevo Le6n, 157a, 424a, 483a, 674a, 1533, 1534, 1716.

Morelos, Chihuahua, 658, 859d, 1227a. Mulatos, Sonora, 814.

Muleg§, Baja California, 702, 1697. Mtizquiz, Coahuila, 1687,

Nacosari, Sonora, 439a, 898a, 898b. Naica, Chihuahua, 870.

Navajas (Cerro de las), Hidalgo, 1591. Navidad, Jalisco, 1243a.

Nevado de Toluca, Mexico, 430, 895 1644, 1669, 1724.

Nicolas del Oro (San), Guerrero, 850, 1269, 1282.

Nicolas (San), Tamaulipas, 35.

Noria de Angeles, Zacatecas, 935. Noxtepec, Guerrero, 1675a.

Nuestra Senora, Sinaloa, 949.

Nuevo Le6n, Estado de, 348, 441, 548,. 549, 1070a, 1701.

Oaxaca, Estado de, 55, 301, 308a, 502a, 601, 763, 1001a, 1002, 1070d, 1456. Obispo, Sonora, 445d.

Ocampo, Aguascalientes, 1692.

Ocampo, Chihuahua, 52b, 774.

Ocotes (Cerro de los), Mexico, 770. Ocotes de Tlatlaya, Mexico, 579. Ojocaliente, Zacatecas, 483, 528, 529, 530, 671, 672.

Omeapan, Guerrero, 83.

Orizaba, Veracruz, 81, 182d, 432. Orocbe, Chihuahua, 1581.

Ostula, Michoacin, 1007.

OtzumatLin, Michoaciin, 49, 1362a.

Pacliuca, Hidalgo, 8, 19a, 20a, 21a, 36, 41, 176a, 182a, 183a, 213, 215, 245,. 248, 388, 420a, 917, 955, 998, 999, 1000, 1001, 1074a, 1135a, 1138a, 1141d,, 1161, 1175, 1249, 1367b, '1417, 1443,, 1448, 1451, 1452, 1481, 1492a, 1492b,. lol4a, 1526, 1529, 1574, 1715. Palmarejo, Jalisco, 771, 1006.

Pnuco, Durango, 1445, 1455, 1591. Papas, Sinaloa, 597.

Papasquiro, Durango, 368a.

Parficatas, Guerrero, 1361.

Patamban, Michoacan, 895.

Path6, Hidalgo, 218.

PMzcuaro, Michoaciin, 208, 895. Pedregal de San Angel, Distrito Fed- eral, 1128.

Pedro (San), San Luis Potosf, 199, 689,.

633, 634, 662, 663.

Pefioles, Durango, 561b.

Pen6n Blanco, Zacatecas, 641, 1460. Pefi6n de los Bafios, Distrito Federal,. 288, 299, 1238, 1556.

Bibliography Of Mexican Hbologt And Mining. 679

Picliuculco, Chiapas, 32a.

Pico de Orizaba, 183, 895, 1724.

Pico de Tancitaro, Michoacan, 895. ' Pico de Teira, Zacatecas, 1130.

Piedras Negras, Coahuila, 721, 996. Pinos Altos, Chihuahua, 814a, 1009. Pinos, Zacatecas, 547, 945, 1223. Plomosa, Sonora, 1032.

Popocatepetl, 451, 492, 492a, 895, 1490, 1491, 1492, 1568, 1724.

Porfirio Diaz, Coahuila, 1537.

Potrillos, Durango, 1182.

Pozos, Guanajuato, 733, 1552, 1553, 1553a, 1674, 1674a, 1675b.

Pozos, San Luis Potosi. 749.

Pregones, Guerrero, 1540.

Proafio, Zacatecas, 72.

Puebla, Estado de, 432, 435, 484.

Puerto del Oro, Guerrero, 17.

Puesto, Jalisco, 119.

Purlsima, Zacatecas, 52.

Quebradilla, Zacatecas, 1791.

Ouer6taro, Estado de, 688, 1375, 1437,

Quilate (Kio), Veracruz, 693, 1603.

Kafael (San), Zacatecas, 1721.

Ramos, San Xjuis Potosi, 589, 647, 1357,

Rayas, Guanajuato, 1379, 1380, 1381. Real del Monte, Hidalgo, 37, 38, 70, 211, 213, 215, 258, 259, 361, 450, 955, 1041f, 1249, 1421, 1448, 1526, 1553c. Realito, Sinaloa, 1243.

Rio del Oro, Guerrero, 604, 1588.

Real del Oro, Mdxico, 672a.

Eoblo, Jalisco, 1324.

Rosa (Santa), Coahuila, 751, 753.

Rosa (Santa), Hidalgo, 607.

Rosa (Santa), M6x4co, 717.

Rosario, Sinaloa, 1138.

Sahinal, Chihuahua, 381.

Sabinas (Valle de), Coahuila, 837, 837a,

Sabino, San Luis Potosi, 197.

Bain Alto, Zacatecas, 709a.

Salinas (Valle de), Coahuila, 837, 837a. San Dimas, Durango, 389a.

Ban Felipe, Coahuila, 534e.

Ban Jo86de Gracia, Sinaloa, 232a, H27a, 1208a.

San Luis Potosi, Estado de, 589, 625, 709a, 1437, 1532.

San Pedro, Sonora, 776d.

Santa Ana del Valle, Oaxaca, 305a, 1578.

Santa Clara, Sonora, 44ob, 1064a.

Santa Eulalia, Chihuahua, 534a, 578,

Santa Fe, Chiapas, 960.

Santa Isabel, Durango, 534d.

Santiago Minas, Oaxaca, 1071.

Santiago (Ojo de), Puebla, 157.

Santiago Papasqiiiaro, Durango, 368a.

Sebastian (San), Jalisco, 874, 1243a.

Septentribn, Chihuahua, 622, 749a.

Sianori, Durango, 1572.

Sierra Madre del Sur, 1041b.

Sierra Mojada, Coahuila, 383, 500, 636, 971a, 1300, 1528.

Sinaloa, Estado de, 204a, 206, 478a, 530a, 673a, 1056, 1060b, 1060c, 1058, 1059, 1262, 1550, 1695, 1696.

Soconusco, Chiapas, 1222.

Socorro (Isla), Colima, 674.

Sombrerete, Zacatecas, 514, 534b, 813a, 1076, 1720.

Sonora, Estado de, 153, 182, 204a, 206, 330, 342, 381 a, 445a, 445c, 445e, 445g, 478a, 506, 532, 566, 681, 704, 750a, 1022* 1045, 1054, 1111, 1172, 1330, 1478, 1494a, 1618, 1632, 1635.

Soto la Marina, Tamaulipas, 911.

Sultepec, Mexico, 336, 429, 533, 701, 770, 834a, 1539, 1548, 1549, 1666,

Tabasco, Estado de, 330a, 856, 1496,

TacaiFi (Volcto de), Chiapas, 1724.

Tacubaya, Distrito Federal, 1061.

Talea, Oaxaca, 1388.

Tamaulipiis, Estado de, 524a, 600.

Tamazula, Durango, 333, 1598.

Tainazula, Jalisco,

Tambor (Cerro del), Puebla, 1326,

Tapado (Laguna del), San Luis Potosi, 1363, 1631.

Tapalpa, Jalisco, 875.

Tapilula, Chiapas, 1698.

Tapona, San Luis Potosi, 1723.

Tavares, Guerrero, 1628.

Taxco, Guerrero, 164, 387, 851, 1070, 1482a.

680 BIBLIOaRAPHY OP MEXICAN GEOLOGY AND MINING.

Tecali, Puebla, 102, 397.

TecomatUn, Puebla, 1081.

Tehuacan, Puebla, 266, 435, 1112. Tehuantepec, Oaxaca, 152, 1524. Tehuilotepec, Guerrero, 709.

Tejupilco, Mexico, 913.

Temascaltepe’c, Mexico, 7, 187, 340, 809, 1253a, 1351, 1596.

TenguedO, Hidalgo.

Teojomulco, Oaxaca, 507, 1071. Tepetongo, Mexico, 1525.

Tepeyahualco, Puebla, 266.

Tepezal, Aguascalientes, 1203, 1653. Tepic, Territorio de, 572a, 1196. Tequisquiac, Mexico, 365.

Tetela del Oro, Puebla, 859.

Tetipac, Guerrero, 769, 858. Texcocingo, Mexico, 308.

Texcoco, Mexico, 18, 719.

Tezintlan, Puebla, 955a.

Tlacolula, Oaxaca, 305a.

Tlacoliilam, Veracruz, 508.

Tlalpujahua, Michoacn, 208, 214, 669, 968, 1209, 1265, 1372.

Tlaquiltenango, Morelos, 1311.

Tlatlaya, Mexico, 859c, 1070d.

Tlaxcala, Estado de, 1309.

Tlaxiaco, Oaxaca, 1310.

Todos Santos (Bahia de), Baja Cali- fornia, 1702, 1703.

Toluca, Mexico, 1670.

Topia, Durango, 438a, 543d.

TorreOn, Coahuila, 1573a.

Tres Marias (Mas), 674.

Tula, Hidalgo, 1004.

Tulitic, Puebla, 1319.

Tuxtia (Volc4n de), Veracruz, 895, 1068,

Ucareo, Miclioacfin, 1625.

Urique, Chihuahua, 575, 656.

' Uriiachic, Chihuahua, 657.

! Uruapan, Michoacan, 741.

i Valenciana, Guanajuato, 1034.

I Vallecillo, San Luis Potosi, 382. i Valle de Mexico, 356, 384, 739, 1129, 1415, 1670.

Vaquerias, Hidalgo, 1675c.

Velardena, Durango, 538, 1183a. Venado, San Luis Potosi, 945.

Veracruz, Estado de, 432, 1044, 1232, 1418, 1584.

Veta grande, Zacatecas, 534, 587.

Villa Aldama, Nuevo Le6n, 997,

Villa Juhrez, Oaxaca. See Ixtldn. Villaldama, Nuevo Leon, 1576. Virgenes (Volcan de las), Baja Cali- fornia, 1724.

Xalostoc, Morelos, 268, 882.

Xichd, Guanajuato, 1553b.

Xochitepec, Morelos, 1352, 1378. Xonacatepec, Morelos, 268.

Yanhuitlan, Oaxaca, 271.

Yedras, Sinaloa, 916a, 1586.

Yesca, Tepic, 1070c.

Yucatan, Estado de, 725, |1424, 1495, 1499, 1522.

Zacatecas, Estado de, 52a, 222, 237, 644, 700, 705, 706, 714, 810, 1076, 1077, 1331, 1437, 1722.

Zacoalco, Jalisco, 1029.

Zacuhlpam, Mexico, 350, 1325, 1376. Zacualtipiin, Hidalgo, 327, 328. Zamorelia, San Luis Potosf, 1363.

Zapote (Mina del), Hidalgo, 257.

Zapote, Sinaloa, 1060b,

Zimaptin, Hidalgo, 496, 499, 849, 850. Zomelahuacan, Veracruz, 511, 1418. Zopilote (Mineral del), Tepic, 1137. Zumpango, Mexico, 365, 366.

Index.

[IsTote. — In this Index the names of authors of papers are printed in small capi- tals, and the titles of papers in italics. Eeferences to papers expressly treating of the subject named are likewise in italics ; and references to casual notices, giving but little information, are usually indicated by bracketed page-numbers.]

Errata.

So far as the Secretary is aware, the pages of this volume ax’e free from error, with the sole exception of a single paper, of the text of which the following corrections were received from the author after the sheets had been printed ;

Page

Line

From

bottom

“8 miles” should be “15 miles.”

last

“50 to 75” should be “350 to 400.”

Ig

top

Add, “ The veins strike N-S, and dip from 45° to 75°. ”

bottom

“ Alfreina ” should be “ Alfreiia.”

bottom

Substitute, “ The larger veins can be traced 3 or 4 miles.”

first

Substitute and add, so that the first sentence (beginning at

the bottom of p. 400) will read: “The ores consist of lead and zinc sulphides and carbonates in quartz gangue. Eich gold- and silver-ores occur in the oxidized portions of the veins. Below water-level the gold-values axe smaller, and the silver-values more constant.’'

top

“ A GO-ton mill ” should read, “ a mill producing 50 tons of concentrates daily.”

top

“Alfreina” should bo “Alfreiia”; and the mention of the Palo Blanco mine should bo struck out.

top

“ The product should be “ some of the product.”

top

Tills lino should bo struck out, and the next should read, “ The Montezuma,” etc.

bottom

“ 250-ton ” should bo “ 200-tou.”

Accidents, miiu-owucrs rcsponsiblo for, 8.

Acid treal/ of pncipitatos in cyanide process, 205.

Actopau Mts*, Piuihuca, Hidalgo, M(ix., 232.

Adobe, Rewrhemtory 248 et neq.

Aguastuilioutes, 208; copper-deposits [333], 511 ; excursion to, ; garnet [500] ; Btnel ting-works, .

Aguilar, Prof. Poneiano, mining map of Guanajuato, 223 ; on veins of Guanajuato

[ 2201 .

Aguilarito, Guamyuato, 222.

AcuTiLAR Y BAHTithAN, Baeakl, BMioifraphy of Mexican Geology and Mining, Achtilrea, G., OeograpUcal ami Gcologiaal Dktnbution of the Mineral Deposits of Mexico [cxxvij, 407; on the minerals of Pachnca [298].

Alaman, history of Guanajuato [217].

Vol. .— 41

Index.

Alameda gold-mine, Sonora [518].

Alfaxena gold-mine, Chihnaliua, clxxii.

Alfarena silver-mine, Parral, Chihualiua, 474, 475.

Almandite, 58.

Almaloya district, Chihualiua [460], 469.

Altar district, Sonora, Mex., 176, 177, 178 [326], 518.

Alvaradena gold-mine, Cliiliualiua, Mex, [466].

Amalgamaiion Methods, Especially the Patio Process, 276, 484.

Amber from southern Mexico, 91.

Amealo district, Queretaro, Mex., opal from, 65.

American Museum of Natural History [60] [72].

American Smelting and Refining Co., smelting system at East Helena, Mont., 380 ; at Pueblo, Colorado, 375.

Amethysts from Guanajuato, Mex., 56, 61.

Amplicacion de San Pedro silver-lead-mine, Nuevo Leon, Mex., 242.

Analyses: coal, 151, 152, 346; coke, 155, 162, 163; dacite, 437; iron-ore, 162, 345; opal, 62, 63 ; silver-lead ores, 104, 126, 127, 401, 409 ; precipitates from cyanide process, 205 ; water, 338 et seg.

An Adobe Reverb eratorij Faryiace (Gross) [cxxviii], 248.

Anglo-Mexican Mining Co., cyanide records of, 213, 214, 215.

Anillo de Hierro mine, Nuevo Leon, Mex., 345.

Antimony: distribution in Mexico, 507; mining concession for, 7.

Apodaquena silver-mine. Chihuahua, Mex. [462].

Apophyllite from Guanajuato, Mex., 61 [221], 223,

Aquilarena silver-mine, Chihuahua, Mex. [462].

Aragonite, or Mexican onyx [82], 89, 90.

Arellano, Sr. Don Felipe, address of welcome at Parral [Mexican Meeting], clxiii. Arembeua gold-mines. Chihuahua, Mex. [466].

Argentine, Kan., smelters at [100].

Argentiferous lodes of Hungary [233].

Argentite, Guanajuato, Mex. [220], 222; Pachuca, Hidalgo, Mex. [238] ; near Zaca- tecas, Mex. [287].

Arizona : Clifton copper-mines [177] ; Copper Queen mine, 81 [177] ; garnet in [57] ; Globe copper-mine, 81 [177] ; mountains of southeastern, 166, 168 ; Morenci cop- per-mines [177] ; obsidian in Gila region [83] ; turquoise-mines [59] ; United Verde copper-mine [177].

Arrastra, the invention of, 244.

Arriola, Nestor, early prospector in Coahuila, 101.

Arser ic, mining concession for, 7.

Asbestos : distribution in Mexico, 499.

Ascenci6n silver-mine. Chihuahua, Mex. [465],

Asientos gold-mines, Aguascalientes, Mex. [500].

Assays, see analyses.

Aurocyanides, furnace for smelting, 207 to 211.

Aztco lapidary work, 87.

Baca, Eduardo Martinez, Historical Sketch of Mining Legislation in Memm [cxxvi!,

Bacauchito mine, Sonora, Mex. [325].

Bajio region, Mexico, 269.

Balcequillo district, Chihuahua, Mex., 469, 473.

Bar-iron, physical tests, 163.

Barium : distribution in Mexico, 502.

BaiTel-amalgamation, 488.

Barron silver-mine, Pachuca, Hidalgo, Mex., barytite from [237].

Barrotoran coal-field, Mex., 345.

Index.

Barytite, Pachuca, Hidalgo, Mex. [237].

Basaltic rocks, Pachuca, Hidalgo, 232.

Bataii, Qaeretaxo, Mex., opal from, 35.

Batopilas silver-mine, Chihuahua, Mex., cliv.

Bazonopa river, Sinaloa, Mex., 455.

Bee-hive coke-ovens, Coahuila, Mex., 153.

Belen silver-mine, Chihuahua, Mex., cliv.

Bellocin silver-mine, Chihuahua, Mex. [464].

Benavidas Smelting Co., Ceralvo, Nuevo Leon, Mex,, 243.

Bercena, Mariano, on Mexican onyx, 89 ; report on opal-district of Queretaro, Mex.,

Berth clot’s thermo-chemical law, 492.

Beryl : distribution in Mexico, 500.

Bibliography of Guanajuato, Mex., 223.

Bibliography of Mexican Geology and Mining (Aglilar y Santillan), 605.

Bisbee, Arizona, mining-district, 81, 177.

Bismuth : associated with tin in San Luis Potosi, Mex., 507 ; distribution in Mexico, 507 ; mining concession for, 7; ores of, San Luis Potosi, Mex., 481.

Bizcayna gold-silver mine. Chihuahua, Mex., clxxii, 475.

Black, Samuel J., improved cam on stamp-batteries [246].

Black Hills, South Dakota, tin-deposits [506].

Blake collection, U. S. National Museum [59] [61].

Blake crusher [160].

Blake, William P., Notes on the Mines and Minerals of Guanajuato, Mexico [cxxvii], 216 ; identified chalchihuitl in New Mexico, 80 ; tur(iuoise-mines near Santa F6, New Mex., 69.

Blanca silver-mine, Coahuila, Mex., 101.

Blast-furnacc : at Monterrey, 348; charge-cai*, 392, 393; cup-and-cone feeding-de- vicc, 369 ; efiect of size and mechanical character of charge, 363, 364 ; feeding- systems compared, 392; Hixou’s mechanical feed, 381; mechanical feeding, 353 ct seq, ; reactions and smeltiug-oolumn, 355 et seq.

Bocanegra load-mine, Nnevo Loon, Mex., 242.

Bog-ore, mining concession for, 7.

Bohemian garnet, Chihuahua, Mex., 56.

Bolanitos silver-mine, Guanajuato, Mex. [219], 221.

Bolailos silvor-minos, 516.

Bolivia: copper-deposits at Corocoro [442] ; tin-deposits [506].

Bolson, Mex., plain of [266],

Boquilla tin-mine, San Ijuis Potosi, Mex., 482.

Boss, M. P., The Pachuca StampBattery and Its Predecessors [cxxviii], 244.

BRAHC.m, Victor M., and EmiuiEL ORDofiEZ, The Mexican Bailroad-System [cxxvi], 259. Address of welcome at Mexican meeting, exx et, seq.

Bravo (Rio Grande) river, Mex. [266].

Breccia, Sierra Mojada, Coahuila, Mex., 305, 106.

Brinton, I). (L, archaeologist, 77,

Bnona Ventura silver-load-mino, Coahuila, Mex., 103, 107,

Buena Vista silver-load-mine, Nuevo Loon, Mex., 242, 474.

BiionoH Amigos Hilver-load-mino, Nuevo Lo6n, Mex., 242.

Buhtamente, , Jr., A Study of Amalgamation Methods, Espeoially the Patio Proms, %oUh the Object of Avoiding the Loss of Mercury [cxxviii], 484.

CabadefSa silver-mine, Chihuahua, Mex., 463.

Cabrera silver-mine, Topic, Mex. [517].

Cabrestante silver-mine, Chihuahua, Mex. [465].

Cacachillas silver-mine, 514.

Oacoma gold-mines, Jalisco, Mex. [500].

Index.

Calcite, Guanajuato, Mex., 223; Pachuca, Mex., 236.

Calera salt plains, Zacatecas, Mex. [267].

Calicanto vein, Pachuca, Hidalgo, Mex., 292, 300.

Caliche, Durango, Mex,, 161.

California quartz-gems, 59; obsidian [83].

Camacho, Zacatecas, Mex., 267.

Camalmahi gold-mine, Lower California, Mex. [517].

Campanas silver-mine. Chihuahua, Mex. [468.]

Cananea, Sonora, Mex., copper-mines, 177, 428, 443 ; geology of district, 431 ; smelt- ing-plant, 435.

Candelaria mountains, Mex. [267].

Cantera, or altered quartz-porphyry, 170.

Capula silvei-mine, Hidalgo, Mex. [516].

Capote copper-mine, Cananea, Sonora, Mex., 431.

Carboniferous period in Mexico, Mex., 172.

Cardiganshire, So. Wales, galena-deposits [293] ; vein-filling of lodes, 286, 293.

Carmen silver-mine. Chihuahua, Mex. [464].

Carmen silver-lead-mine, Nuevo Leon, Mex., 242.

Carrizal mountain, Nuevo Le6n, Mex., 344.

Cassiterite from Durango, Mex , 58.

“ Caving ’’-methods of mining in Coahuila, Mex., 134.

Celaya, Guanajuato, Mex., city of, 271-

Central America, jadeite from [69], 74 [79].

Central Plateau region, Chihuahua, Mex., 445.

Cerezo Mts,, Pachuca, Hidalgo, Mex., 232.

Cerro Colorado silver-gold-mine, Chihuahua, Mex., cliv, 519

Cerro del Zumate mountain, Pachuca, Hidalgo, Mex., 230.

Cerro Mercado, Durango, Mex., topaz [500].

Chacoaco silver-mine, Zacatecas, Mex., 516.

Chalcliihuitl or jadeite, 56, 61, 68 et seq.

Charge-car for blast-furnaces, 392, 393.

Charge-column, arrangement of, 362.

Chequina silver-mine, Chihuahua [463].

Chemical theory of the patio process, 277.

Chemistry of the patio process, 277, 488 et seq.

Chequina silver-mine, Chihuahua, Mex. [463].

Chiapas, chaUMlmitl in [76],

Chico mining district, Hidalgo [230].

Chihuahua, Mex. : Almaloya district [460], 469 ; ancient gold- and silver-minc.s, 460, 477; Balcequillo distret, 469, 473 ; bismuth -deposits [507]; Bohemian garnet, 56; Central Plateau region, 445 ; chalcedony, 61 ; city of Chihuahua, cl et seq. 266 ; coal [499]; Conchos river [266]; copper-deposits [510]; garnet, 57 [500]; Guadalupe y Calvo, 406, 452 et seq.; historical mines, 477; historical and statistical data of Parral, 472; Hueyuquilla district, 469; Jimenez copper-mines, 404; labor, 477; La Compania Industrial Mexicana, clvii ; Las Vegas copper-mines, 402; lead-deposits [513]; Le Cumbre district [454], 456 et seq.; mercury-deposits, 509; Minas Nuevas district, clxxi, 474; mining district near Escalou [266]; mining district of Parral [266], 459; mountains of, 168; Notes on Certain Mines, 396 et seq. ; Notes on a Section of the Sierra Occidental, 444 ; opal [499] ; output of Principal mines, cliv; Parral, clix et seq.; Parral mines, 399 et seq., 445 et seq., 459. 474 ; population of various districts, 473 ; principal mining-camps, cliv ; Kc- duction-works at Santa Barbara, 477 ; Eio Domingo valley, 455 ; Rio Verde cafion, 455; Eiparra valley, 449; Bonces Valles district, 470; Bosario vein, 406, 407; San Diego de las Minas Nuevas district, 467; San Francisco del Oro district, 466; San Jos6 dc Garcia region, 410; San Patricio district, 468; San Pedro de la Cieuega district, 470; Santa Barbara district, , 465, 476; Santa Eulalia dis trict, 106 [266], 396; Todos Santos district, 468; Villa del Parral, 462.

Index.

Ohihuahua and Pacific Eailroad, 264, 330.

China, jadeite in, 82, 83, 93,

Chism, Eichard E. A Syiopsis of the Mining Laws of Mexico [csxviii], 3.

Christy collection, rock-crystal skull of, 60.

Chromium : distribution in Mexico, 505.

Chrysocolla used as a gem [81].

Cinco cle Mayo iron-mine, Nuevo Leon, 345.

Cinco Sefiores gold-mine, Chihuahua, Mex. [466].

Cinco Toros gold- and silver-mine. Chihuahua, Mex. [465]

Cinnabar-deposits: in Mexico, 509; G-uanajuato, Mex., 220 [223] ; Texas [173].

City of Mexico, clxxiii ; flooded, 274.

Ciudad Gomez [267].

Clark and Merrill on nephrite and jadeite [69],

Classification of mineral substances, 7.

Clays, mining concession for, 7.

Clifton copper- mines, Ariz. [177].

Climate in Coahuila, 139.

Coal, analyses of Mexican, 151, 152, 346; distribution in Mexico, 499.

Coal-Fields of Las JEsperanzas, Coahuila, Mexico (Ltjdlo'w) [cxxxi], 140.

Coal-fields; Coahuila, Mex., 140 [333] ; Nuevo Le6n, Mex., 345; Sonora, Mex. [325].

Coal-mining, Las Esporanzas, Coahuila, Mex., 148 etseq.

Coal- washers, Coahuila, Mex., 154.

Coahuila, Mex. : analyses of various ores, 104; Baroteran coke, 163; charcoal from, 160 ; City of Porfirio Diaz [267] ; City of Torreon [267] ; climate, 139; coal [499] ; coal-fields [333]; Coal-Fields of Las Fspemnzas, 140; coal -formation, 151; coal- mining, 148 ei seq. coal- washers, 154; contact-deposits, 108, 137; copper-deposits, 125 [510] ; copper-deposits at Jimulco, 175 ; copper-ore, 102 ; faulting at Sierra Mo- jada, 173 ; garnet [500]; geology of the Sierra Mojada, 104; gold-copper deposits, 520; history of miuing-dovolopmcnts, 101; hoisting, 138; iron, 125,504; labor, 139; lakes of Mayrau and Tlahualilo [266] ; lead-carbonate deposits, 102, 122,128; lead-deposits, 513; low-grade ores, 130; methods of mining, 132 et seq.; mine- fires, 138; Monclova iron-mine [344]; Motes on Certain Mines, 396; Ore-Deposits of the ierra fojada, 100 et seq., 560; oro-zone, 137; production of the Sierra IVIoJada district, 103; prospecting in, 136; Sabinas coke, 162; salt [502]; Sierra I flan tada ranges, 106; silver chloride, 102, 125; silver-mines of, 103 et seq,; ml- phide-or(\s, 131 ; tccali [89] ; timbering in, 338; water-supply, 139; water-supply of Las Esporanzas, 117; zinc, 125.

Cobalt, mining concession for, 7.

Ool)rc <5 coppei’-iniue, Cananea, Sonora, Mex. [433J.

Coinage-tax in Mexico, 39.

Coke: analysis of coko from Bai'oteran, 346; of Mexican coke, 155, 162, 163.

Coke-ash, analysis of, 163.

Coking-plant, Ijas Esporanzas, Coahuila, Mex., 353; Monterrey, Mex., 153.

Colorado silver-mine, Chihuahua, Mex. [468],

Colorado; smelting-system at Pueblo, 375.

Compana Minora Fundi dora y Afiaadora, Monterrey, Mex., 243,

Coticoption del Oro mountain and mines, Mazapil, JIacatecas, Mex. [267] [500].

Concessions for mining in Mexico, 7, 8, 10; amplification, reduction, 31 et seq.

Couchos river, Ohibuahua, Mox, [266],

Consolidated Kansas City Smelting and Refining Co., feeding-devices used at Argen- tine, Kan., 374 ; works in Coahuila, 102.

Constitution of Mexico [7].

Consular invoice for exported oro, 95.

Contact-deposits, Coahuila, Mex., 108, 137.

Contracts, mining, 46.

Cooper, William, discovers aragonite in southern Mexico, 90.

Index.

Copper: distribution in Mexico, 509; in eruptive rocks, 510; mining concession for, 7. Copper-deposits: Aguascalientes, Mex. [333j; Chihuahua, 510,511; Coahuila, Mex., 102, 123, 125,175; distribution in Mexico, 509: Durango, 511; Guerrero [5101, 512; Hidalgo, 510, 520; Jalisco [512]; Michoacan, Mex., 177 [333], 512; Kuevo Leon, 510; Sinaloa, Mex., 177 [512]; Sonora, Mex., 177, 42S, 443; Tamaulipas, 510 ; Tepic [512] ; Zacatecas, 511.

Copper-mines, Arima : Clifton [177] ; Copper Queen [177] ; Globe [177] ; Morenci [177]; United Verde [177]. CMhiialma, Mex, : Guaynopita [civ] ; Hiieyuquilla dis- trict, 469 ; Jimenez, 404 ; La Soledad [470] ; Las Vegas, 402 ; Magdalena [469] ; Sacramento [470] ; San Camilo [470] ; Santo Cristo [469] ; San Fernando [469] [470]; San Juan [469]; San Nicolas [469] [470]; Santa Gertrudis [470]; Santa Maria [469]; Santo Domingo [469]; Refugio [469]. Sonora, Mex,: Altar, 176, 177, 178; Cananea, 177, 428, 443; Nacosari, 177, 428.

Copper Queen mine, Arizona, 81, 176.

Cordilleian plateau [163], 165 *to 176.

Cornwall, England: quartz crystals, 290; tin-veins [443].

Corocoro, Bolivia, copper-deposits [442].

Coronilla silver-mine, Guerrero, Mex. [517].

Corundum known by Aztecs, 73.

Costa Rica, jadeite from [69], 73 [79],

Costs: of cyanide process, 212; of patio process, 333.

Country-rock, mining concession for, 7.

Covena silver-mine, Chihuahua, Mex. [463].

Crestoiies (vein-croppings) , Pacbuca, Hidalgo, 234.

Cretaceous deposits, Pachuca, Hidalgo, Mex., 233.

Cretaceous limestone, Sierra Mojada, Coahuila, 105.

Cretaceous period in Mexico, 172,

Cuadras silver-mine, Chihuahua, Mex. [466],

Cuervito mill, Pachuca, Hidalgo, Mex. [226].

Cup-and-cone feeding-devices for blast-furnaces, 369.

Cuprous chloride used in amalgation, 492.

Cyanide process : cost of, 212 ; For ClaySlimes, 179 et seg. ; records of treatment, 213, 214, 215; reduction of precipitates, 205; various tables relating to, 189 to 195. Cyclops, a variety of chalcedony, 61.

Dacite, analysis, 437.

Damages in case of accident, 8.

Damour on garnets, 58; jadeite, 69, 82.

Deeds, tax on, 52.

De la Beche on quartz crystals, 290.

Denouncements, 24 et seg.

Denver and Rio Grande Railroad (footnote), 316.

Denver silver-lead-mine, Nuevo Leon, Mox., 242.

Diamond in Mexico, 56, 92..

Diaz, General, liberal mining laws, 5.

Dionea silver-lead-mine, Coahuila, Mex., 106 et seg.,

District of Hidalgo del Farral, Mexico, in 1820 fDOMiNaUEz) [cxxvii], 459.

Dolores silver-lead-mine, Coahuila, Mex. [112].

Domeyko on cuprous chloride in the patio process, 280.

Domin'gxjez Noeberto, TJie District of Hidalgo del Farral, Mexico, hi 1820 [cxxviij,

Don Caspar lead-mine, Nuevo Ledu, Mex., 242.

Douglas, A. E., minerajogical collection of [60].

Dragoon Arizona,, mountain pass, 166./

Drainage, damages and losses, 8.

Drainage-tunnel, opening, 8.

Index.

Dulces Nombres de Maria silver-mine, Chihuahua, Mox. [464] [465].

Durangite, Durango, Mex., 58.

Durango: analysis of iron-ore, 162: bar-iron manufactured at, 163; bismuth-deposits [507] ; caliche, 161 ; copper-deposits, 511 ; garnet [500] ; G-uanacevi silver-mines [408]; iron-mines [333]; Iron Motmtahi, 156; iron -ores, 504; iron-works, 153; kaolin-deposits [502]; lead-deposits [513]; mercury-deposits [509]; mining code [4] ; ruby from, 57 ; San Fernando mining region [410] ; Santiago Papasquiero district, 299, 300 ; sapphire, 57 ; sulphur [501] ; tecali [89] ; tin-deposits [507] ; topaz from, 58, 92 [500].

Dwight, Aethue S., Glossary of Spanish- American Mining and Metallurgical Terms [cxxviii], 571; Mechanical Feeding of Silver-Lead Blast-Furnaces [cxxviii], 353. Dwight spreader and curtains, modifying Hixon’s blast-furnace feeder, 388.

Easements and tunnel-rights, 41 to 46.

Effect of large charges in blast-furnaces, 363.

Egleston, Prof., on loss of color in opal, 66.

El Alamo gold-mine, Lowei California, Mex. [517].

Elba, tin-deposits [506].

E1 Chico silver-mines, Hidalgo, Mex. [516].

El Cocheiio silver-mine, cliv.

El Cristo iissures, Pachuca, Hidalgo, Mex., 233, 235.

El Cubilctc Mt., Guanajuato, Mex, [270].

Elonita copper-mine, Cananea, Sonora, Mex., 431.

Elisa copper-mine, Cananea, Sonora, Mex., 434.

El Oso silver-lcad-inino, Nuevo Leon, Mex., 242.

El Paso, Texas, smelters [100], 373.

El Puerto, mercury-deposits [315].

El Bofugio silver-mine, Chihuahua, Mex., cliv.

El Bofugio silvor-loacl-mino, Guanajuato, Mex., 219 [220].

El Bosario silvor-lead-mino, Nuevo Le6n, Mex., 242.

Kl Tiiijo silvei'-niino, Chihuahua, Mex. [462].

R1 Tiro General silver-mine, Guanoiiuato, Mex., 218.

El Triunfo silvor-mino, Lower California, Mex. [514].

El Vordo silver-gold-mine, Chihuahua, Mex., clxxii, 475.

Emeralds, 56, 57 ; in Guerrero, Mox., 92.

Emma silvor-lcad-mino, Coahuila, Mex., 106.

Emmonb, 2nb, N. H., The Value of Ores in Mexico [cxxix], 94.

Encantada silvor-load-mino, Coahuila, Mex., 103, 130.

Encarnacidn garnot-mines, Hidalgo, Mex. [500].

Enoino silver-mine, Pachuca, Hidalgo, Mex., 228.

Encyclopedia of the mining law of Mexico [4].

Escalon, Chihuahua, Mex., mining district near [266].

Esmeralda Bilver-load-mino, Coahuila, Mox., 103, 109, 112, 129.

Esperanza, Querotaro, Mox., opal-mines of, 64, 65.

Esperanza gold-mine, Sierra Azul, Sonora, Mex,, 440.

Essonite, 58.

Evatis, Sir John, second largest quartz gem, 60.

Exploitation of mineral subsiancos, 8.

Exploradora silver-lead-mino, Coahuila, Mex., 103, 106 et seq.

Exploration on public lands, 11; on private property, 11, 13.

Exported ore, tax on, 05,

Expropriations for mining purposes, 40.

Extraction by cyanide process, rate of, 189, 190.

F'actura, or bill of sale, for ore, 96.

Faulting in Mexico, systems of, 171, 172.

Index.

Federal Constitution of Mexico [71.

Federal District of Mexico, railroads in, 332.

Federal tax, 9, 95.

Feeding-devices for lead blast-furnaces, 369 et seq.

Fees of mining agents, 19.

Fernandez, on mercurous and cuprous chlorides in the patio process, 279.

Field Columbian Museum, Chicago [61],

Fire-opal, 62.

Flor de Pena silver-lead-mine, Nuevo Leon, Mex., 242.

Fluorine: distribution in Mexico, 501.

Foreign prospectors and companies, laws concerning, 13, 47.

Fortifications, prospecting in or near, 13.

Fortuna gold-mine, Chihuahua, Mex., 410.

Fortuna silver-lead-mine, Coahuila, Mex., 103, 112, 124.

Foster, C. Le Neve, on country-rock, 288 (footnote).

Foundry at Durango, 161.

Fractional part of a claim, location, 10.

France: cel estite -deposits at Condorcet [502].

Franquena gold- and silver-mine. Chihuahua, Mex. [462] [465].

Fresnillo mining district, Zacatecas, Mex. [267] [315].

Fresnillo silver-mine, Zacatecas, Mex., 514.

Fronteriza silver-mine, Coahuila, Mex., 130.

Fuchs and DeLaunay, on silver-mines of Mexico [5171.

Fuel for furnaces at Durango, 160.

Furnace for smelting aurocyanides, 207 to 211; Mitchell hot-blast copper [435].

Galan Zona silver-lead-mine, Coahuila, Mex., 103.

Galena-deposits: Cardiganshire, So. Wales [293] ; Hidalgo, 238.

Galenite, Guanajuato, Mex. [220].

Gallindo, Qiieretaro, Mex., opal, 65.

Garabatos silver-mine, Chihuahua, Mex. [465].

Garnet; distribution in Mexico, 500; pink, 55,57.

Garniquena silver-mine, Chihuahua, Mex., 470.

Gas-producers at Monterrey, Mex., steel-plant, 350.

Gems and Precious Stones of Mexico (Rmiz) [cxxviii], 55. Discussion, 568.

Geographic and Geologic Features, and their Relation to the Mineral Produefs of Mexico (Hill) [cxxix], 163.

Geographical and Geological Distribution of the Mineral Deposits of Mexico (Agitilkra) [cxxvi], 497.

Geology: Cananea district, Sonora, Mex., 431 et seq.; Goal-fields of Ims Tilsper(ui;::u,% Coahuila, Mex., 140 et seq, ; Cordilleran province, 169 ; Iachuca district, Hidalgo, Mex., 230; Santa Eulalia, Chihuahua, Mex., 397; Santa Maria del Bio, Sau Luis Potosi, Mex., 478 ; Sierra Azul district, Sonora, Mex., 439 ; Sierra Mojada, Coa- huila, Mex., 104 et seq.; Sierra Pinitos region, Sonora, Mex., 435; Sonora, Mox., 175, 176 ; Tehuantepec province. 178.

Globe copper-mine, Arizona, 81 [177].

Glossary of Spanish- American Mining and Metallurgical Terms (Dwight) [cxxviii], 571.

Gold: amalgamation, 484 etseq.; distribution in Mexico, 517, 518; from mines of Guanajuato, Mox., 220; in granite, 517; in pegmatite, 518; at Iron Mountain, Durango, Mox., 158; mining concession, 7; mining in Sonora, 178.

Gold-mines of Mexico: Chihuahua: Alfaroha, clxxii : Almaloya [460], 469; Alvaradena [466]; Arembeiia [466]; Balcequillo [460], 469, 473; Biscayna, clxxii, 475; Cerro Colorado, cliv, 519 ; Cinco Senores [466] ; El Verde, clxxii, 475 ; Fortuna, 410 ; Guadalupe y Calvo, 406 ; Guazapares, cliv ; Indopendeucia, 409 ; La Capitaneha [-166] ; La Cumbre, 410 ; La Gloria, cliv ; La Hundida [466] ; La Negri ta, 462; La Rata [466]; Los Bronces [466]; Los Muertes, clxxii, 474, 475; Nopal, clxxii;

Index.

Pacbuquena, clx3:ii,475; PalmiUa, 474; Perros Bravos [466]; Plaza de Armas [466] ; Prose tia, clxxii, 474 ; Quebradillas, clxxii ; Eefugio, 407 ; Eonces Valles [460], 470; Eosario, 406; San Diego de Minas Nuevas, 460; San PraDCisco del Oro, 460; San Francisco de la Moreua, clxxii; San Jose de Garcia [466]; San Patricio, 460; San Pedro de la Cienaga [460] ; Santa Barbara, , 460 [466]; Santo Domingo, cliv, 398, 468 ; Veta Grande, clxxi. Guerrero : San Cristobal [519]. Jalisco: Eepublic, 518. Lower California: Calamabi [517]; El Alamo [517]; Eeal del Castillo [517] ; San Borja [517]: Santa Clara [517]. Mexico. Los Ocotes [519]. Oaxaca' Santa Catarina, 518, Taviclies, 519. Sonora: Alameda [518]; Esperanza, 440; Gran Fortuim, 440, Oro Bonito, 440; Porvenir, 440, 443 ; Eas- trita [518]; San Antonio [5181; Sierra Azul district, 438; Sierra Pmitos, 435; Tajitos [518]. Sinaloa: Eialto [519]. Tepic: Ixtlan, 519.

Gold- and silver-mines of Mexico- Chihuahua: Cinco Toros [465] ; Pranquena [465]; La Antigua [465]; La Soledad [465]; La Vasquena [465]; Monterilla [465]; Pelaies [465]; Pillares [465]; Quevadeua [465]; San Francisco [465]; Santa Clara [465] ; Taraciega [465]. (

Gold-copper deposits in Mexico, 520.

Gold-placers, law relating to subterranean, 12.

Gold-silver; deposits in Mexico, 519, output in Mexico, 334; veins, Zacatecas, Mex.,

Gomena silver mine, Cliiliuahua, Mex. [4GSj

Gi-aii Fortuua goULininc, Sierra Azul, Sonora, Mex., 440.

Gran Fundicion Nacional Mexicana, Monterrey, Mex., 243.

Graphite- distribution in Mexico. 498.

Green quartz, 61 [81].

Greenwood, Prof,, on chemical reactions in the patio process, 277.

Gronstettcr, Paul, originator of the process of wet stamp-milling, 244.

Gross, John, An Ailolw lUrerheraiorif Furnace [cxxviii], 248.

OroBsnlarite, 58.

Guadalajara, Mex., excursion to, clxxxiii ; sulphur [501].

Guadalcjtzar, San Luis I'otosi, Mex., sulphur [501],

Guadalupe gold-mine, Chihuahua [410].

Guadalupe lead-mine, Nuevo Ldon, Mex. [242].

Guadalupe mill, Pachucu, Hidalgo, Mex. [226].

Guadalupe, y Calvo, Chihuahua, Mex., 452 d seq. ; gold-mines, 406.

Guauacovi silver-iniueH, Durango, Max. [408].

Guanajuato, Mex. ; amethysts, 56, 61 ; ai)ophyllite, 61 [221], 223; bibliography of, 223 ; city of Celaya, 271 ; city of Guanajuato, 216; city of Irapuato, 270 ; city of Leon, 269 ; city of Salamanca, 270 ; city of Silao do Aictoria, 270 ; city of Amalie de San- tiago [271]; emerald from, 57 ; excursion to, clxxxvi ; fluorine [502]; history of mining, 217; kaolin-deposits at Salamanca [315]; La Luz district, 219, 220: low- grade ores, 333 ; mcmiry-oro, 220, 509 ; Mining College of, 216 ; mining district, clxxxviii; molybdenum [507]; Notexf 07i the Mines and Mmeruls, 216; opal [499]; output of gold and silver, 220 ; silver-ores, 220 ; tin-deposits [507] ; topaz, 58 [500] ; vein-systems of, 217; Vein Madre system, 217; Victoria tuunol, 222,

Guatemala, Central America, jadoito in, 69, 74 [79].

Guaynopita coppor-mino, Chihuahua, Mex., civ.

'<tuazivpares gold-mine, Chihuahua, Hex., cliv.

Guerrero, Mex.; antimony-deposits [508] ; asbestos [49,9] ; chalchihnitl [76] ; coal [499]; copper-deposits [510], 512; diamonds, 56; emerald, 57, 92; garnet [500]: gold- deposits, 51B; graphite, 498; iron-oros, 503; low-grade ores, 333; manganese [505] ; morcury-doposits [509] ; mining-towns in, 330 ; opal from [62], 63 [66] ; sulphur, 501 ; Tcluiilotepce district, 296.

Guggonlieim Exploration Oo., 477.

Guggenheim Bmolfcing Co., fooding-dovicos used by, 369.

Gulf coastal plain [103], 165,

Gutibrroz, Zacatecas, Mex., city of [267].

Index.

Hallock, William, on jadeite, 69.

Halsb, Edwaed, Notes 07i the Structure of Ore-Bearing Veins in Meeko [cxsix], 2S5.

Harlequin opals, 64.

HermosillOj Sonora [325].

Hidalgo, Mex. : antimony-deposits [508] ; bonanzas of Pachuca, 239, 240 ; Calicanto vein, 292, 300 Chico mining district [230], city of Tula, 278; copper-deposits [510] , emerald, 57 ; garnet [500] [501] ; gold-copper deposits, 520 ; graphite, 498: Hidalgo Mining Co., 477 ; iron-ores, 504 ; kaolin-deposits [502] ; lead-deposits [513] , low-grade ores, 333 ; manganese [505] , metallurgical works at Pachuca, : mining code [4] ; Mimng District of Pachuca, clxxvi, 224 [327] i molybde- num [507] ; obsidian in, 84, 85, opal [62] [63] [499] , 333 , Pachuca Stamp-Battery , 244; principal mills, 226, quartz gems, 59 ; Real del Monte district, 224 [327], 333; Scientific Institute of Pachuca, 225; tin-deposits [507], vein-phenomena of Pachuca, 233 et seq.

Hidalgo and ISTorth Eastern Railroad, mileage [263].

Hidalgo copper-mine, Nuevo Leon, 242.

Hidalgo del Parral in 1820 (Dominguez) [cxxvii], 459.

Hidalgo del Parral, Chihuahua, historical and statistical data, 472.

Hidalgo Railroad, 326.

Hill, Robert T., The Geographic and Geologic Features and their Relation to the Min- eral Products of Mexico [cxxix], 163.

Historical SJceiclh of Mining Legislation in 3Iex(co (Baca) [cxxvi], 520.

Hixon’s blast-furnace feeder modified, 388 , original form, 381.

Hoisting in Ooahuila, Mex., 138.

Holmes, W. H., describes obsidian mines in Hidalgo, 85, 86.

Honduras, jadeite from, 73.

Hooper pneumatic concentrator, 162.

Hope, Philip Henry, mineral collection of, 67.

Hornillas mines, Mapimi, Durango, Mex. [500].

Hostotipaquillo silver-mine, 516.

Huehuetoca, ancient city of, 274.

Huejotitan district, Chihuahua, Mex., 473.

Hueyuquilla district, Chihuahua, Mex. [460] [469].

Huitzuco, Guerrero, Mex., opal [63].

Humboldt, Alexander von, brought fire-opal from Mexico, 67.

Hungary, argentiferous lodes [233].

Hunt, T. Steiry, on cuprous chloride in the patio process [283].

Hyacinth-red fire-opals in Hidalgo, 63.

Hyalite, 62.

Hydrocarbons : distribution in Mexico, 499.

Hydrophane, 62.

Igneous rocks, Cordillexan, 143 [169], 170.

Iguana silver-mino, Parral, Chihuahua, Mex. 1464], 474.

Independencia silver-, Chihuahua, Mex., 409.

Intoroceanic Railroad, Mex. [263], 306 to 311.

Irapuato, Guanajuato, city of, 270.

Iron: reduction of, in lead-smelting, 358.

Iron-mines of Mexico . Co ahuUa : Monclova, [344]. Durango [333 j. Nuevo : Anillo de Hierro, 345 ; Ciuco do Mayo, 345 ; Piedra Iman, 345. f (disco [333].

Iron Mountain and the Plant of the Mexican National Iron and Steel Company, Durango, Mex, (Witherbee) [cxxxi], 156.

Iron-ore in Coahuila, Mex., 125; distribution in Mexico, 503: Durango, Mex., 162; Hungary, 504 ; mining concession for, 7 ; Monterrey, Mex., 345 ; Man Luis Potosi,. Mex , 481 ; Ural Mts., Russia, 504-

IxtUn gold- and silver-mine, Topic, Mex., 519.

Iztac chalchihuitl, 82.

Index,

Jade, jadeite, or chalcliihuitl, 6S to S3,

Jalisco, jVlex., copper-deposits [512], garnet [500], gold-deposits [518]; iron-mines [333], lead-deposits, 513, mercury-deposits, 509; ’bdenum [507]; obsidian, 84, 88 ; opal 162] , tellurium, 501 ; tin-deposits [507]; town of Lagos, 269.

Jasper, 61.

Jesus Maria silver-mine, Chihuahua, Mcx., clxvii [462] [463], 474,

Jesus Maria silver-mine, Guanajuato, Mex. [219], 220.

Jesus Maria silver-lead mine, Coahuila, Mex., 101, 103, 112, 114, 122 [129].

Jimenez, Chihuahua, Mex., city of [266].

Jimenez copper-mines, Chihuahua, Mex., 404.

Jimulco, Coahuila, Mex., copper-deposits, 175 ; cotton district [266].

Juarez silver-lead mine, Coahuila, Mex., 108.

Jurado opal-mine, Querctaro, Mex., 64.

Kaolin : distribution in Mexico, 502 ; Salamanca, Guanajuato, Mcx. [315].

Kimball, J. P., on geology of Santa Eulalia, Chihuahua, Mox., 397.

Klaproth, analysis of opal, 63.

Kroiicke, used cuprous chloride in amalgamation process, 492.

Kitnz, Georcuo Frederick, Gems md Predons "Atones of Jj[e.UGo [cxxviiil, 55 Discus- sion, 568.

La Antigua gold- and silver-mine, Chihuahua, Mex., 465.

La Aurora silver-lead mine, Coahuila, Mcx., 103.

La Baranca silver-mine, Sonora, Mex. [514].

La Blanca y Anoxas silver-lead mine, Nuevo Leon, Mex., 242.

Labor in Mexico Chihuahua, 477 ; Coahuila, 139 ; Sau TjuIs Potosi, 483.

Labradcha silver-mine, Chihuahua, Mex. [466].

La Capitaiicna gold-mine, Chihuahua, Mox. [466].

La Caruicoria silver-mine, Chihuahua, Mex. [464J.

La Cata silver-mine, Guanajuato, Mex., 218.

La Compania Industrial Mexicana, Chihuahua, Mox., clvii.

La Cumbre gold-mines, Chihuahua, Mex., 410.

La Esporanza, Quorohiro, Mox., opal [62].

La Esporanza silver-lead-mino, Nuevo Leon, Mex., 242.

Lagartijo load-mine, Coahuila, Mox., 129.

La Gloria gold-mine, Chihuahua, Mex., cliv.

Lagos, Jalisco, Mex., town of, 269.

Hundida gold-mine, Chihuahua, Mex. [466].

Xa Iguana silver-mine, (Jhihnahua, Mex. [464], 474.

Laird, Joseph L., patentcMl iinprovemont in orc-stamp.s [245].

Lakes M'ayrau and TlahuaUlo, Mexico [266].

La Lihcrtad silver-lead-mino, Nuevo Leon, Mox., 242.

Lallaro, (ucrotaro, Mox,, opal from, 65.

La Luz Bilver-minoH, Guanajuato, Mox., 219, 220, 222.

La Minoria silver-mine, (Jhihnahua, Mox. [403].

La Mortaja silvor-mino, (Jhihuahua, Mox. [464].

Landmarks for mining claims, 22,

La Nogrita gold-mino, Chiliuahim, Mox., 462.

Til Palmilla silver-mine, Chihuahua, Mex. [463],

La Paz, Guanajuato, Mex., topaz from, 58.

La Paz, Lower California, Mox., quartz gems, 59.

La Peila silver-mine, (Jhihuahua, Mex. [464].

La Ilomosa silver-mine, Chihuahua, Mcx. [468].

La Ploinosa silvor-load-mino, Nuevo Le6n, Mox., 242.

La Purisima silver-mine, Chihuahua, Mox. [464],

La Piu'issima silver-mine, Giiamyimto, Mex. [219], 220.

Index.

La Rata gold-mine, Chiliualina, Mex. [466].

La Realidad silver-lead-mine, Nuevo Le6n, Mex., 242.

Laredo coal-field, 345.

La Ronquilla silver-mine, Chihuahua, Mex. [462] [464].

La Santisima Trinidad silver-mine, Chihuahua, Mex. [468].

Las Cabras silver-mine, Chihuahua, Mex. [465].

Las Cuevas district, Chihuahua, Mex., population, 473.

Las Esperanzas, Coahuila, Mex., Coal-FiehU, 140 et seq.; excursion to. clxxxxiii ; town of, 145 ; water-supply, 147.

Las Guri gas silver-mine, Chihuahua [463].

Las Navajas mountain, Pachuca, Hidalgo, Mex,, 230 [232] ; silver-mines, 227.

La Soledad copper-mine, Ronces Valles, Chihuahua, Mex. [470].

La Soledad gold- and silver-mine, Chihuahua, Mex. [463] [464] [465] [466].

La Sultana silver-lead- mine, Coahuila, Mex., 103.

Las Ventanas del Chico Mt., Pachuca, Hidalgo, Mex., 230.

La Trinidad silver-mine, Guanajuato, Mex. [219], 220.

La Trinidad silver-mine, Pachuca, Hidalgo, Mex., 228.

La Union mill, Pachuca, Hidalgo, Mex. [226].

La Union silver-mine, Parral, Chihuahua, Mex., 474.

La Union silver-lead -mine, Nuevo Leon, Mex., 242.

Lava-flows, Las Esperanzas, Coahuila, Mex., 143 [169], 170.

La Vasquefia gold- and silver-mine, Chihuahua, Mex. [465].

Las Vegas copper-mines, Chihuahua, Mex., 402.

La Vivocilla silver-mine, Chihuahua, Mex. [462].

La Vizcaina fissures, Pachuca, Hidalgo, Mex., 233, 234 La Voladora silver-lead-mine, Monterrey, Nuevo Leon, Mex., 212.

Laws relating to precious metals, 7 ef seq.

Lead: distribution in Mexico, 512; mining concession for, 7.

Lead-carbonate deposits, Coahuila, Mex., 102, 122, 128.

Lead-mines: Nuevo Leou, 242 ; in Sierra Mojada [333]. {See ((ho lead-silver mines, and silver-mine.)

Lead-ore : valuation based on New York quotations, 96, 97.

Lcad-silver-deposits: Chihuahua, Mex., 396, 442; Mexico, 174.

Lead-silver mines: OMhuahua, 3Iex. Parral, 399; Santo Domingo, 398; Coahnila, Mex., Blanca, 101; Buena Ventura, 103, 107; Diouea, 106 et seq. ; Dolores, 112: Eraiiia, 106 ; Eucantada, 103, 130 ; Esmeralda, 103, 109, 112, 129 ; Exploradora, 103, 106, 108 ef seq. ; Fortuna, 103, 112, 124; Fronteriza, 130; Galan Zona, 103; Jesus Maria, 103, 112 et seq. ; Juarez, 108; La Aurora, 103; Lagartijo, 129; La Sultana, 103; Parrena, 103; Providencia, 103,112; San Francisco, 103; San Jos6 [102], 103 et seq. ; San Miguel, 112 ; San Salvador [102], 103 et seq. ; Tiro B., 103 ; Tiro Juarez, 103 ; Tiro No. 10, 125 ; Tiro No. 11, 103, 125 ; Veta Rica, 103 et seq. ; Vokan Dolores, 103, 121, 129. {See also Lead-mines and Silver-mines.)

Lecheria, city of, 275.

Le Cumbre district, Chihuahua, Mex. [454], 456 et seq.

Leon, Guanuato, Hex., city of, 269.

Lime-ores, Coahuila, Mex., mining of, 135.

Limestone, cordilleran, 169, 170; Monterrey, 346; silver-bearing in Coahuila, 124, 125. List of Members and Associates, xii et seq.

Litigation in mining, 35, 38.

Loreto mill, Pachuca, Hidalgo, Mex. [226],

Los Bronces gold-mine, Chihuahua, Mex. [466].

Los Bronces silver- mine, Sonora, Mex. [514].

Los Cerrillos, New Mex., turquoise-mines, 81.

Los Dulces Nombres silver-mines, Chihuahua, Mex. [468].

Los Giu'ijas silver-mine, Chihuahua, Mex. [463].

Los Locos silver-mine, Guanajuato, Mex. [219], 220.

Index.

69a

Los Miiertos silvor-mine, Chihuahua, Kex., clxxii, 474, 475.

Los Ocotes gold-miue, Mexico, Mex. [519].

Los San Pedros silver-lead-mine, Nuevo Leon, Mex., 242.

Lower California, Mex. : antimony-deposits, 508 ; barium, 502 ; copper-deposits, 512 garnet, 57; manganese-deposits, 294; quartz gems, 59; teeall, 89.

Ludlow, Edwin, The Coal-Fields of Las Espemnzas, Coahiila, Mexico [cxxxi] 140. Lynde, Martins T., remarkable specimen of amber, 91.

Magdalena copper-mine, Chihuahua, Mex. [469].

Magistral in amalgamation, 494; mines of, Chihuahua, Mex., 470 Malagute and Durocher on silver chloride in the patio process, 280.

Malcolmron, James W., The Sierra Mojada, Coahiula, Mecico, and its Ore-Dejwsits [cxxvi], 100 ; discussion, 566.

Manganese: distribution in Mexico, 505; mining concession for, 7; Monterrey, Nuevo Leon, Mex., 346; Muleje, Lower California, Mex., 294; Pachuca, Hidalgo, Mex., 237.

Manzanillo branch of the Mexican Central Eailroad [264].

Manzano, Jesus P., Mineral Zone of Santa Maria del Rio, San Luis Fotosi, Mex. [cxxix], 478.

Maps: Cordilleraii plateau, 164; Las Esperanzas coal-basin, 141; Mexico, large mining-map, 319 ; small sketch-map, 172 ; Northern Sonora, 421 ; Route of In- stitute excursion to and from Mexican meeting, cxli; Sierra Mojada mining district, 122.

Mapimi, gold-placers of [266],

Maravillas IVCining Co., Pachuca, Hidalgo, Mex., 229 [297].

Market-value of Mexican ores, 96.

Martinez, Enrico, builder of drainage-system for City of Me.ico [273].

Mary silver-mine, Parral, Chihuahua, Mex., 474.

Matamoras liranch of the luteroceanic Railway, Mex. [263].

Matape silver-mine, Sonora, Mex., 294.

Mawe, John, on precious stones, 63.

Mazapil district, Zacatecas, Mex. [316] ; mountain range [267].

Mazaililn, Sinaloa, Mex., city of [267].

Mechanical Feeding of Silver- Lead Blast-Fiirnaces (DwmiiT) [cxxviii], 353.

Medina, Baltazar de, on etymology of the name Pachuca, 227,

Medina, Bartolomeo de, inventor of the arrastra, 244; of tho patio process, 227 [276]. Melladito silver-mine, Guanajuato, Mex. [219].

Mellado silver-mine, Guanajuato [217] [218].

Mcmlnu'S and Associates, xii et seg.

Mercaderes silver-mine, Chihuahua, Mox. [462].

Merc\iry : distribution in Mexico, 508; El Puerto deposits, Mex. [315]; Guanai)uato, Mex. [220]; loss in amalgamation, 489; mining concession for, 7; San Luis Potosi, 481.

Merrill and Clark on nephrite and Jadoito [69].

Meyer, A. B., describes jadoite, 74.

Mesa Central, Chihuahua, Mex., 404.

Metallurgical works : law relating to, 38, 39.

MetztitUui cailtm, Pachuca, Hidalgo, Mox. [230].

Mexican Central Railroad [167], 263, 313 to 316.

Mexican Coal and Coke Co. [143].

Mexican Cordilleran province, 167, 171.

Mexican International Railroad [167], 263, 319, 320.

Mexican tneoting: Excursions and eutortainmonts, cxxxix et m;.; Proceedings, cxviii

Mexican Mational Iron and Steel Company, Dnrango, 156 et seq,

Mexican National Railroad [167], 263, 316.

Index.

- 694 :

Mexican Ore Co., Monterrey, Mex., clxxxxiii.

Mexican Northern Railroad, 331; various lines, 264.

Mexican Railroad, from Mexico City to Vera Cruz, 311, 312.

3£exiGan Eailroad-System (Beaschi and OeboiJez) [cxxvi], 259.

3Iexiea7i Bailroads and the Mining Industry (Salazae) [cxxvi], 303.

Mexican Southern Railroad, 263, 327, 328.

Mexico, Cuernavaca and Pacific Railroad, 263, 329.

Mexico : City of, clxxiii, 274 ; Bibliography, 605 ; distribution of population, 261 ; Gems and Bredous Stones, 55, 568 ; Bistorical SMch of 3£ining Legislation, 520; labor in coal-mines, 144 ; 3Imeral-Deposits, 497 et seg, ; map, 172, 319 ; mining school [267] ; Mining Industry, 303 et seg.; Mining Law, 3, 520; onyx, 55, 81 et seg. ; mint, 94; Potahie Waters, 335 ; Structure of Ore-Bearing Veins, 285. (See also numerous separate headings, under the names of the several States, etc.)

Miargyrite, Gruanajuato, Mex. [220] [223].

Michoacn, Mex.; copper-deposits, 177 [333], 512; Gold- Amalgamation, 484:; lead-de- posits [513] ; ores, 333, 484 ; obsidian, 84 ; opal [62] [66], 499; quartz gems, 59. Michoacan and Pacific Railroad, 331.

Miguel Escobedo silver-lead-mine, Nuevo Le6n, Mex., 242.

Mills (for stamping, concentrating and lixiviating): Guanajuato, Mex., clxxxvi; Pa- chuca, Mex., 226, 246 ; Parral, Mex., 474; Santa Barbara, Mex. [clx], 401.

Mina del Agua silver-mine, Chihuahua, Mex., 475.

Minas Nuevas district, Chihuahua, Mex., clxxi, 473 et seg.

Mine-fires, Coahuila, Mex., 138.

Mineral oils, mining concession for, 7.

Mineral Railway, Neuvo Leon, Mex., ore-shipments, 243.

Mineral waters, mining concession for, 7.

Mineral Zone of Santa Maria del Bio, San Luis Potosl (Manzano) [cxxix], 478.

Mining agents, 15, 17, 18, 19.

Mining claims, monuments and plans, 22.

Mining College at Guanajuato, Mex., 216.

Mining District of Paclmca, Mexico (Obdoiez) [cxxxi], 224.

Mining Industry and 3£exitan Bailroads, 303.

Mining Lam of Mexico, 3 et seq.

Mining Legislation in Mexico, Historical Sketch of, 520.

Mining litigation, 35, 38.

Mining School of Mexico [267] ; of Pachuca, 225.

Mining surveys and surveyors, 20.

Mints of Mexico, 94,

Miocene rocks in Pachuca, Hidalgo, Mex. [232].

Miradena silver-mine, Chihuahua, Mex. [462].

Mitchell hot-blast copper-furnaces [435].

Molybdenum : distribution in Mexico, 507.

Moiicenate silver-mine, Chihuahua, Mex. [468].

Monclova iron-mines, Coahuila, Mex. [344].

Moctezuma Mining and Milling Co. [401].

Montana: smelting system at East Helena, 380.

Montanas lead-mine, Nuevo Leon, Mex., 242.

Monterilla gold- and silver-mine, Chihuahua, Mex, [465].

Monterrey, Nuevo Leon, Mex. [267]; analysis of iron-oro, 345; excursion to, clxxxxiii; iron-ores, 344; iron- works, 153; limestone, 346; manganese, 346; silver-deposits [174] ; smelters [100] ; Steel-Plant, 344 et seg.

Monterrey and Gulf Railroad [167], 263, 323, 324.

Montezuma Lead Co. [clx], 477.

Monuments for mining claims, in Mexico, 22.

Morena silver-mine, Parral, Chihuahua, Mex., 474.

Index.

Morelos, Mex. : Branch, of Intcroceanic Railway [263] ; garnet, 57 [500] ; iron>ores [504] ; pink garnet, 55; mineral resources, 323; rosolite, 55, 57; slag-granulation [252]; stone stamp-mill, 259; Views of an Old Smelter, 251 et seq.

Morelos, Mexico, Cuernavaca and Pacific Railroad, 329.

Morcnci copper-mines, Arizona [177].

Morenos lead-mine, Nuevo Leon, Mex., 242.

Mosaic agate, 90,

Moss-opal, 62.

Mount Mozquitic, San Luis Potosi, Mex., opal, 65.

Mount Teira, aurifei*ous veins [267].

Mulejc, Lower California, Mex., manganese-deposits, 294.

Nacosai'i copper-mines, Sonora, Mex., 177, 428.

National Railroad of Tehuantepec [304].

Negrita silver-mine, Chihuahua, Mex., clxvii.

Nephrite compared with jadeite, 69, 70; from Siberia [74].

New Mexico, garnet [57]; mountains of southwestern, 168; turquoise-mines [59], 68, 80, 81.

Nevada, obsidian [83].

New York, distance from various commercial parts, 307, 303.

New Zealand, jadeite [75].

Nica, Friar Marco de, refers (1539) to turquoise m New Mex., 80.

Nicaragua, jadoito, 70, 73.

Nicaragua Canal, distance between commercial parts via, 307, 308.

Nickel; distribution in Mexico, 505; mining concession for, 7.

Nieves mining district, Zacatecas, Mex. [267].

Nijni-Tagil iron-deposits, Ural Mts., Russia, 504.

Noble opal, 62.

Nopal gold-mine. Chihuahua, Mex., clxxii.

Nopal silver-mine, (Huuiajuato, Mex. [507].

Nopalos silver-mine, Chihuahua, Mex. [464], 475.

Norieguona silver-mine, Chihuahua, Mex. [465].

A'Otes 0 ) 1 , dei’tain Mines in the States of Chllmahna, Sinaloa and Sonoro, Mexico (Weed) [cxxvii], 396.

Notes on the Mines and Mino'als of Giianajmto, Mexico (Blakid) [cxxvii], 216.

Notes on the PotaUe Waters of Mexico (Eeohards) [cxxix], 335.

Notes on a Section Amm the Sierra Mad>re Occidental of GMhimhna and Sinaloa, Mexico (Weed) [cxxvii], 444.

Notes on the Structure of 0)'e-Bea)'mq Veins in Mexico (Holse) [cxxix], 285.

Noxtepec silver-mines, Oiiorrero, Mex. [516].

Kuostra Bonora de Guadalupe silvor-mino, Guanajuato, Mex. [218].

Nuestra Behora del Rayo silvor-mino, Chihuahua, Mox. [463] [468].

Nuestra Bonora del Rosario silver-mine, Chihuahua, Mex. [464].

Nuestra Benota de la Boledad silvox'-mine, Chihuahua, Mex. [468].

Nuestra Bonora do los Dolores silver-mine, Chihuahua, Mox. [465].

Nuevo , Mox.; aualyscs of iron-ores from Monterrey, 345; city of Monterrey, clxxxxiii [267] ; copper-deposits, 510 ; garnet [500] ; lead -deposits, 512 [513] ; list of metallurgical works, 242 ; list of mines, 242 ; mining statistics, 241 ; monthly ghipmonts of ore, 243; silver-deposits [174j ; sted-plmit at Monterrey, et seq,; tin-deposits [507].

Nuttall, Mrs. Zelia, archaeologist, on jadoito, 75, 76, 77,

Oaxaca, Mex.; asbestos [499J; chalchihuitl [761,78; coal [4991; garnot[500]; graphite, 49H; iron-ores [504); jadoito, 72, 79; Mexican onyx, 82; molybdenum (507]; pe- troleum (4991; ruby, 57; salt [5021; sulphur [5011; Tavichos silver-district, 292, 2S)7, 301; tecali [89].

Index.

Oaxaca and Mexican Southern Railroad, 327, 328.

Obsidian, 56, 83 et seq. ; mines in Hidalgo, 84, 227.

Ocampo silver-mine, Chihuahua, Mex., cliv.

Occidental Railroad [264].

Ochexs, mining concession for, 7.

Olcott, E. E., Presidential response to address of welcome at Mexican Meeting, cxxiii,

Olivas district, Chihuahua, Mex., population, 473.

Olmeda, Ignacio, on La Luz mines, Guanajuato [221].

Omaha and Grant Smelter, Denver, Colo., feeding-devices, 373.

Opal : distribution in Mexico, 62 et seq., 499.

Open-hearth furnaces at Monterrey, Mex., 348.

OedojJez, Ezequiel, The Minimj District of Pachiica, Jfexico Ecxxxi], 224 ; remarks on the minerals of Pachuca [298].

Okdonez, Ezequiel and Victor M. Brxschi, The Ilexlcan Railroad-Si/stem [cxxvi],

Ore : assays from Santa Barbara, Chihuahua, Mex., 401 ; behavior of coarse and due in blast-furnaces, 365; character of the Santa Eulalia, 398; consular invoice for, 95; shipped from Nuevo Leon, Mex, 243; tax on exported ore, 05; tax on smelted ores, 95 ; valuation, 94 et seq.

Ore-hearing veins in Mexico, 285 et seq.

Ore-deposits: Cananea, Sonora, Mex., 432; Las Vegas, Chihuahua, Mex., 402 ; Mexico, 285 ei seq , 497 et seq. : Sierra Azul district, Sonora, Mex., 439, 443 ; fiierra Mojada, Coahuila, Mex., 100 et seq. ; Sierra Piuitos, Sonora, Mex.,437.

Oro Bonito vein, Sierra Azul, Sonora, Mex , 440.

Ortega, Manuel Valerio, The Patio Process for Amalgamation of Silver-Ores [cxxxi],

Pachuca, Hidalgo, Mex. ; district, 224, 333 ; garnet [501] ; geology, 230 ; manganese, 237; mining school, clxxxii; obsidian, 84; quartz gems, 59; Mining District, 224; Real del Monte Mining Co. [101], 224; Scientific Institute, 225; silver-mines, 516.

Pachuca Min. Co., Pachuca, Hidalgo, Mex., 229.

Pachuca Stamp-Battery and Its Predecessors (Boss) [cxxviii], 244.

Paehuquena gold-silver-mine, Chihuahua, Mex., clxxii, 475.

Paisano, Texas, mountain pass, 166.

Palacio City, Mex, [267].

Palmarito silver-mine, Sinaloa, Mex., 426.

Palmilla gold-mine, Parral, Chihuahua, Mex., output, 474.

Palmitas silver-mine. Chihuahua, Mex. [464].

Panama Canal, distance between commercial parts via, 307, 308.

Parral, Chilmahua, Mex., clix et seq., 446 et seq. ; camps supplied from, 473 ; District in 1820, 459; historical and statistical data, 472; mines, 399 et seq., 474; railroad facilities, 473 ; reduction-works, 474.

Parral Branch of the Mexican Central Railroad, mileage [264].

Parral Mine, Limited, mill, 477.

Paxrena silver-lead-mine, Coahnila, Mex., 103.

Patio Process: A Study of Amalgamation Methods, with the Object of Avoiding the Loss of Mercury (Bostamente) [cxxviii], 484.

Patio Process for Amalgamation of Silver-Ores (Ortega) [cxxxi], 276.

Podxogal silver-mine, Tasco, Guerrero, Mex,, 296.

Peineta, Qucretaro, Mex., opal, 65.

Pelares gold- and silver-mine, Chihuahua, Mex. [465].

Peiioles gold-silver mines, Durango, Mex. [501].

Penon Blanco silver-mine, iZacatecas, Mex., 514.

Pcras gold-silver mines, Oaxaca, Mex, [500j.

Porros Bravos gold-mine, Chihuahua, Mex. [466].

Index.

Petroleum iu Oaxaca., Mex., 499.

Pfort curtain for lead-blast-furuaces, 371.

Piedra Iman iron-mine, Nuevo Leon, Mex., 34o.

Pig-iron, grading of, 158.

Pillarcs gold- and silver-mine, Chihualma, Mex. [4()5].

liuitos Mts , Sonora, Mex., ore-deposits, 437.

Pinos Altos silver-mine. Chihuahua, Mex., cliv.

Placer-deposits as mining property, 9,

Platinum, mining concession for, 7.

Plaza de Armas gold-mine, Chihuahua, Mex. [466].

Polo Norte fissures, Pachuca, Hidalgo, Mex. [‘233J.

Polybasite, Guanajuato, Mex. [220] [223].

Porfirio Diaz, City of, Coahuila, Mex. [267].

Porvenir gokl-mme. Sierra Azul, Sonora, Mex., 440, 443.

Precipitates in cyanide process: analysis of, 205. reduction to bullion, 205.

Breclom Stones and Gems ni Mexico (Kunz) [cxxviii], 55. Discussion, 568.

Progoiies Silver-mine, Guerrero, Mex., 514.

Presona gold-silver mine, Chihuahua, Mex.,clxxii, 475 ; output, 474.

PuxTOHETT, C. W., Fiews of an Old Smelter in the State of Morelos, Mexico [cxxviii], 251.

Proaiio reduction-works, patio process used by [283].

Progreso mill, Pacbuca, Hidalgo, Mex. [2261.

Prospecting ; laws relating to, 11 et seq,

Providoncia silver-load-niine, Coahuila, Mex., 103, 112.

Public land, prospecting on, 11.

Puebla, Mex. asbestos [4991 ; chalcbihuitl [761; chromium, 505 ; coal I499J; copper- deposits, 510 [512J ; garnet [500]; iron-ores, 503; kaolin-deposits [5031; lead- deposits [5131; manganese [5051; mining districts, 323: molybdenum 1507J I salt (5021; tecali [891; tin-deposits [507].

Pueblo, Colo.: smelters [lOOl ; smelting-system, 375.

Puortocitos coppor-mincvS, Oauanoa, Sonora, 430.

Pumpclly, Raphael, first identifies jade, 80.

Purisima Chica mill, Pachuca, Hidalgo, Mex. [226] [2271.

Putnam, Frederick W., collection of jadeite, 73.

Pyrargyritc, Guaiu\iuato, Mox. I220J, 222; Oaxaca, Mex., 301.

Pyrito, 92 ; at Iachuca, Mex., 237, 238 ; used for ornaments and mirrors, 88.

Pyrope (Bohemian garnet), 58.

Quartz gems, 59, 60, 92, 236.

Quebradillas silv(U--mine, Chihuahua, Mox., clxxii, 475; output, 474.

Quetzal chalchihuitl, 82.

Quevadeila gold- and Hilver-mlue, Chihuahua, Mox. [465].

Queretaro, Mox, ; antimony [5081 ; bismuth 15071 ; city of Queretaro, 271 ; city of San Juan del Bio, 272; city of Tequixipiiapan, 272; Esperanza opal-mine, 64, 65; Jurado opal-min<!i, 64 ; nickel [505] ; obsidian, 84 ; opal, (>2 et seq. [499] ; opal- mining, 63, ; Bosarlo opal -mine, 64 ; Simpatica opal -mine, 64; tin [507 ].

Railroads; Chihuahua and Pacific, 330; Denver and Rio Grande, 316 ; Federal Dis- trict, 332; Hidalgo, 326; inlluencc on mining, 332; Infceroceanic, from Acapulco to Vera Cruz, 3214fig.; Intorocoanic, of Tehuantepec, 263, 306 to 311 ; Mexican, 311,312; Mexican Central Ll67], 203, 313 to 316; Mexican International [167], 263, 319, 320; Mexican National (1671, 263, 316, 319 ; Mexican Northern, 264, 331 ; Mexican Southern, 263, 327, 328 ; Mexico, Cuernavaca and Pacific, 263, 329 ; Miehoacan and Pacific, 331 ; Monterrey and Gulf [1671, 263, 323, 324 ; Rio Grande, Sierra Madre and Pacific, 330; Sonora, 325, 326; under construction, 334. Yuca- tan, 331.

Ramirez, Santiago, on minerals of Mexico, 56.

Tol. Xxxii. —

Index.

Rastrita gold-mine, Sonora, Mex. [518].

Rath, G. vom, discovered tridymite, 232.

Rayas silver-mine, Guanajuato, Mex. [217], 219.

Real del Castillo gold-mine, Lower California, Mex. [517J.

Real del Monte district, Hidalgo, Mex., 224. [327], 333 [516].

Real del Monte Mining Co , Pachuca, Mox., 101, 224.

Rebariche silver-mine, Parral, Chihuahua, Mex,, output, 471.

Reduotion-worhs. See Mills, Smelting-works and Patio.

Refugio copper-mine, Chihuahua, Mex. [469].

Refugio gold-mine, Chihuahua, Mex., 407.

Refugio silver-mine, Parral, Chihuahua, Mex., output, 474.

Registry of mining transactions, 48 to 51 ; legal title, 8.

Republic gold-mine, Jalisco, Mex., 518.

Resolana silver-mine, Chihuahua, Mex. [464].

Revenue -stamps for mining concessions [6] 29, 30.

Reverberatory furnace, adobe, 248 et seq,

Rey and Eeina gold-silver mines, Jalisco, Mex. [500].

Rhyolite, Hidalgo, Mex., 231, 232.

Rialto gold-mine, Sinaloa, Mex. [519].

RrcHAKDS, Ellen" H,, Notes o% the Potable Waters of Mexico [cxxixj, 335.

Riparra valley, Chihuahua, Mex., 449.

Rio Domingo Valley, Chihuahua, Mox., 455.

Rio Grande, Sierra Madre and Pacific Railroad, 264, 330.

Rio Verde canon, Chihuahua, Mex ,455.

Rock-salt, mining concession for, 7.

Ronces Valles gold-miue, Chihuahua, Mex. [460]; district, 470.

Rosario: district, Chihuahua, Mex., 473; gold-mine. Chihuahua, Mex., 406, 407 ; Min- ing and Milling Co., Chihuahua, Mex., 409 ; opal-mine, Quorctaro, Mox., Ii5 ; silver-mine, Hidalgo, Mex., 228; silver-mine, Guerrero, Mex., 516.

Rosolite in Morelos, Mex., 55.

Ruhy, 56, 57.

Ruby-silver, Guanajuato, Mex., 221, 222.

Russia ; Iron-deposits of the XJral mountains, 504.

Rutile in opal, 66.

Sabanera silver-mine, Chihuahua, Mex. [466].

Sacramento copper-mine, Ronces Valles, Chihuahua, Mex. [4701.

Sacramento silverlead-mine, Nuevo Le6n, Mex., 242.

Sahagun, Friar Bernardo de, on chalchihuitl, 81, 90.

Sainas silver-mine, Chihuahua, Mex. [466].

Salamanca City, Guanajuato, Mox., 270.

Salazae, Luis, Mexican Railroads and the Mining Industry |cxxvi{, 303.

Salt ; Cal era, Zacatecas, Mex. [267] ; distribution in Mexico, 502.

San Antonio Caldas silver-mine, Parral, Chihuahua, Mex., 474.

San Antonio de Padua silver-mine, Chihuahua, Mox. [465].

San Antonio gold-mine, Sonora, Mex. [518] ; silver-mine, Chihuahua, Mox. [462] [4()6j ;

silver-mine, Lower California, Mex. [514].

San Augustin silver-mine, Guerrero, Mex., 296.

San Bernabe silver-mine, Guanajuato, Mex. [219], 220.

San Bias silver-mine, Chihuahua, Mex. [464].

San Borja gold-mine, Lower California, Mex., 517.

San Oamilo copper-mine, Ronces Valles, Chihuahua, Max. 1470].

San Carlos silver-mine, Guanajuato, Mex. [222],

San Cayetano silver-mine, Chihuahua, Mex. [4681.

San Cristobal gold-mine, Guerrero, Mex. [519].

San Cristdbal Mt., Pachuca, Hidalgo, Mex., 230 et sec.

Index.

San Cristobal silver-mine, Parral, Chihuahua, Mex. [464], 474.

San Diego de Minas Nuevas, ‘Chihuahua, Mex., 460, 467, 475.

San Diego silver-mine, Chihuahua, Mex. [465] [468J.

San Eernando copper-mine, Chihuahua, Mex. [469] [470].

San Fernando mining region, Durango, Mex. [410J.

San Felipe, Honduras, jadeite, 73.

San Felipe silver-lead-mine, Nuevo Leon, Mex., 242.

San Francisco de la Morena gold-silver mine, Chihuahua, Mex., clxxii [475].

San Francisco del Oro gold-mine. Chihuahua, Mex., 460 ; mill, 477.

San Francisco Javier silver-mine. Chihuahua, Mex. [468j.

San Francisco las Cruces silver-mine, Chihuahua, Mex., 463,

San Francisco lead-mine, Nuevo Leou, Mex., 242 ; silver-mine, Parral, Chihuahua, Mex. 1464] [465] [466] ; silver-mine, San Patricio district, Chiliuahua, Mex. [468] ; silver-lead-mine, Coahuila, Mex., 103.

Sangrc de Cristo silver-mine, Guanajuato, Mex. [219],

San Isidro silver-mine, Chihuahua, Mex. [468] ; silver-lead-mine, Nuevo Leon, Mex.,

Hanitary Analyses of Mexican Waters, 338 et $$([.

San Javier silver-mine, Sonora, Mox. [514].

San Jose copper-deposits, Coahuila, Mex., 123.

San Jose do Avenito silver-mine. Chihuahua, Mex., 464.

San Jose de Gracia gold-silver mine, Chihuahua, Mex. [466] [468] ; region, 410.

San Jose do los Muchachos gold-silver mine, Guanajuato, Mex. [219], 220.

San Jose : gold-silver mine, Tamaulipas, Mex. [500] , silver-mine, Coahuila, Mex.

[102], 103; silver-mine. Chihuahua, Mex. [463] [465].

San Juan: copper-mino, Chihuahua, Mox. [469] ; lead-mine, Nuevo Le6n, Mex., 242. San Juan silver-mine, Pachuca, Hidalgo, Mex. [227J.

San Juan Bautista silver-mine. Chihuahua, Mex. [463].

San Juan do Guadalupe district, Zacatecas, Mex. [316].

San Juan de Guadalupe mines, Durango, Mox. [500|.

San Juan del Rio, (iuorotaro, Mex., 272 ; opal-rainc, 64.

San Juan de Rayas mine, (Biauajuato, Mox. [218].

San Juan y Anexas silver-lead -mine, Nuevo Lo6n, Mox., 242.

San IjUis Bofcosi, Mox. : antimony-deposits [508] ; bismuth-ores, 481 [507] ; Boquilla tin-mine, 482; building material, 483; excursion to, ; garnet [501]; geol- ogy, 478; industries, clxxxxi; iron-ores, 481; laboi', 483; mercury-ores, 480 [509] ; Mineral Zone of Hanta Marla del Rio, 478; opal, 62, 65 [499] ; silver-deposits [174], 4H0; Himdtors [ 100]; sulplmr [501] ; tin-ores, 481 [507] ; topasc, 58, 92 [500].

San Miguel silver-lead-mine, Coahuila, Mox.. 312.

San Marcos silv<u'-lead-mine, Nuevo Le6n, Mex., 242.

Sail Martin silver-lead-mine, Nuevo Le6n, Mex., 242.

San Nicolas copper-mine, Cliihuahua, Mex, [469] [470],

San Nicolas del Oro, Guerrero, Mox., opal from (63]; silver-mine, 516.

San Nicolas silver-mine, Oliihualuia, Mex. [408 1 ; Guamyuato, 220; Pachuca, Hidalgo, M'ex., 22B. "

Ban Pablo Analco silver-mine, Jalisco, Mex., 516.

San Pablo silver-lead-mine, Nuevo Loon, Mox,, 242.

San Patricio gold-silver mine, Chihualiua, Mex., 460, 474; district, 468.

Ban Pedro de la Oienega gold-mine, Chihuahua, Mox. [460] ; district, 470.

Ban Pedro silver-mine, Guamiijuato, Mex, [219], 220.

Ban Rafael silver-mine, Chihuahua, Mox. [464] [466]; Jalisco, Mex., 516; Pachuca, Hidalgo, Mex., 238, 239.

Ban Rafael Mining Co., Pachuca, Hidalgo, Mox., 226, 229,

San Balvador silver-mine, Coahuila, Mox. [102], 103 et seq.

Banta Ana silver-mine, Parral, Chihuahua, Mox., output, 474.

Santa Anita silver-mine, Guanajuato, Mox. L218J.

Index.

Santa Barbara, Chibuabua, Mox„ , 399 et fieq. , district, 4G5 et seq., 475 ; reduction- works, 477 ; value of ore, 401.

Santa Barbara gold-silver mine, Ghiliuabua, Mex., , 4G0 [464].

Santa Catarina gold-mine, Oaxaca, Mex., 518.

Santa Clara silver-mine. Chihuahua, Mex. [463] [465J, 468; Guanajuato, Mex. [219],

Santa Cruz de Alaya district, Sinaloa, Mex., 296*, 298.

Santa Cruz silver-mine, Chihuahua, Mex., 462 [463].

Santa Eduviges silver-mine, Chihuahua, Mex., cliv.

Santa Eulalia district, Chihuahua, Mex., 106 [266] [316] ; faulting, 173 ; lead-deposits, 442 ; silver-lead deposits, 174. 396.

Santa Gertrudis copper-mine, Eonces Valles, Chihuahua, Mex. [470].

Santa Gertrudis . silver-mine, Pachuca, Hidalgo, Mex., 229 [237], 333 ; harytite from [237]; fissures [233]; silver-mine, Chihuahua, Mex. [464] [465] ; zinc-mine, Nuevo Leon, Mex., 242.

Santa In6s silver-mine, Guanajuato, Mex. [507].

Santa Isabel silver-lead-mine, Nuevo Leon, Mex., 242.

Santa Maria copper-mine, Chihuahua, Mex. [469].

Santa Maria del Rio, San Luis Pofosi, Mex., Mineral ZoneMtS.

Santa Maria de la Bufa silver-mine, Chihuahua, Mex. [465]

Santa Rosa silver-mine, Hidalgo, Mex. [516].

Santa Rosalia, Chihuahua, Mex. [266].

Santiago Papasquiero district, Duraugo, Mex., 299, 300.

Sautisima Trinidad silver-mine. Chihuahua, Mex. 1465].

Santo Cristo copper-mine, Chihuahua, Mex. [469]

Santo Domingo ; copper-mine. Chihuahua, Mex. L469] ; gold-silver mine, Chihuahua, Mex, cliv, 398, 468. silver-mines, Jalisco, Mex. [5161; silver-lead-mine, Nuevo Leon, Mex., 242.

Santo Nino silver-mine, Guanajuato, Mex [219].

Santo Tomas silver-miue, Chihuahua, Mex. [466].

San Vicente : silver-mine, Chihuahua, Mex. [463], 474. silver-mine, Guanajuato, Mex. [219], 220.

Sapphire in Mexico, 56, 92.

Saxony, vein-structure at Segen-Gottos, 286.

Sayiias silver-mine, Parral, Chihuahua, Mex., output, 474.

ScHiERTZ, F. A., and Tays, E. A. H., The Treatment of Olaif-SVnnes by the Cyanide Vro- cess and Agitatmi [cxxviiJ, 179.

Secho silver-mine, Guanajuato, Mex. f218J.

Selenium, distribution in Mexico, 501.

Serpentine as a gem [81].

Settling-box, cyanide process, 198, 199.

Siberia, nephrite [74].

Sicily, amber, 91.

Siemens regenerator, Durango, Mex. [161].

Sierra Azul mining district, Sonora, Mex., 438, 443.

Sierra de Carrizal gold-silver mines, Nuevo Leon, Mex. [500,.

Sierra de Guanajuato, Mex. ’ selenium -deposits, 501.

Sierra Madre, Mex.: Occidental, AM Oriental [265] ; silver-mine, Parral, Chihuahua, Mex., 474.

Sierra Mojada, Coahuila, Mcmco, mid Us Ore-Deposits (Maloolmhon) Icxxvi], 100,

Sierra Mojada district [336] ; faulting, 173 ; silver-deposits, 174.

Sierra Pinitos gold-mines, Sonora, Mex., 435.

Sierra Plantada Mis., Coahuila, Mex., 106.

Silao do Victoria, city of, Guanaiuato, Mex., 270.

Silver: distribution in Mexico, 100 et seg., 158, 480, 513 et seq. {See also lead-silvor- mines, silver-mines, and numerous names of localities.)

Index.

Slilver-Lead Blast-Furnaces, Mechanical Feeding, 353.

Silver'lead mines. See lead-silver mines.

Silver-mines of Mexico: Chihuahua: Alfareiia, 474, 475; Apodaquena [462]; Aquila- reua [4621; Ascension [4G5]; Batopilas, cliv; Belen, cliv ; Bellocin L464]; Biz- cayna, clxxii, 475 ; Cabadena [463] : Cabrestante [4651 ; Campaiias [468] ; Carmen [464]; Cayefcauo [468] , Cerro Colorado, cliv, 519 , Chequiila [463] ; Colorado [4681 ' Coveua [463] ; Cuadras |466], Dulces Nombres 1464] 1465] ; Dulces Nombres de Maria [4651; El Coclieno, cliv El Eefugio, cliv; El Tajo [462] ; Ei Verde, clxxii, 475 ; Pranqueiio [462] ; Garabatos [465] ; Garniqueua, 470 ; Gomeiia [468] ; Histori- cal mines, 477 ; Independeucia, 409 ; Jesus Maria, clxvii [462] [463], 474 ; Labra- deua [466] ; La Carniceria [464] ; La Ignana [464], 474 , La Mortaja [464] ; La Mi- neria [463] ; La Palmilla [463] ; La Pena [464J ; La Plomosa [468] ; La Purisima [464] ; La Eonquilla [462] [464] ; La Santisima Trinidad [468] ; Las Cabras [465] ; LasGurijas [463]; La Soledad [463] [464] [465] [466]; La Vivocilla [462J ; Los Dulces Nombres [468] ; Los Muertos, clxxii, 474, 475 ; Mercaderes [462] ; Mina del Agua, 475 ; Miradena [462] ; Moncenate [468] ; Negrita, clxvii ; Nopal, clxxii, 475 ; Nopales [464], 475 ; Norieguena [465] ; Nnestra Seuores de los Dolores [465] ; Nuestra Senora del Eayo [463] [468] ; Nnestra Sefiora del Rosario [464J ; Nnestra Seiiora do la Soledad [468]; Ocampo, chv. Pachuqiiena, clxxii, 475; Palmitas

[464] ; Pinos Altos, cliv ; Presena, clxxii, 474, 475 ; Quebradillas, clxxii, 474, 475 ; Resolana [464] ; Sabanera [466] ; Sainas [466] ; San Antonio, 462 [466] San Antonio do Padua [465] ; San Bias [464] , San Cayetano [468] I San Cristobol [464], 474 ; San Diego [465] [468] ; San Diego de las Minas Nuevas, 460, 467, 475 ; San Fran- cisco [464] [466] [4681 ; San Francisco de la Morena, clxxii, 475 ; San Fiancisco Javier [468] ; San Francisco las Cruces [463] ; San Isidro 1468] ; San Jose [463]

[465] ; San Jos6 de Avonito, 464 ; San Jos6 do Gracia 410 [466] [468] ; San Juan Bautista [463]; San Nicolas [468]; San Patricio, 460, 468, 474 San Pedro de la Cionoga, 470 ; San Rafael [464] [466] ; San Vicente [463], 474 ; Santa Barbara, , 460 1464] : Santa Clara 14631 [4651 [468]; Santa Cruz, 462 [463] ; Santa Edu- viges, cliv ; Santa Gertriidis [464] 1465]; Santa Maria de la Bufa [465] ; Santisima Trinidad 1465] ; Santo Domingo, cliv, 398, 468; Santo Tomas [466] ; Soledad [463], 464 ; Tarauguona Caldas [464] ; Tares 1468] ; Tecoletes [462] , Toneritos [464] ; Todos Santos district, 468 ; Triguoros [468] ; Urique [5141 ; Vichena [463] ; Xilotopec, 464. Coahuila : Blanca, 101 ; Buena Vontui'a, 103, 107 ; Diouea, 106 et seq. ; Dolores, 112 ; Emma, 106; Encantada, 103, 130; Esmeralda, 103, 109, 112, 129; Exploradora, 103, 106 etseq.; Fortuna, 103, 112, 124; Frontoriza, 130; Galan Zona, 103; Jesus Maria, 101, 106 et seq. ; Juarez, 108 ; La Aurora, 103 ; La Sultana, 103 ; Parrena, 103; Provideucia, 303, 112 ; San Francisco, 103; San Jose, 103 ei seg;. ; San Miguel, 112; San Salvador, 103 et seq.; Sierra Mojada, 102; Tiro B, 103; Tiro Juarez, 103; Tiro No. 10, 125; Tiro No. 11, 103, 125 ; Veta Rica, 103, 108 etseq. ; Volcan Dolores, 103, 121, 129. Durango: Guanucevi [4081. Guanajuato: Bolanitos [219], 221 ; Cata I218J ; El Refugio [219], 220 ; El Tiro General, 218 ; Jesus Maria [219J, 220; La Luz [219], 220, 222; La Cata, 218; La Purissima [2191, 220 ; La Trinidad [2191, 220 ; Los Locos [219], 220; Melladito [219]; Mellado [217] [218J ; Nopal [507J ; Nnestra Soflora do (iluadalupe [2181 ; Rayas mine [217], 219 ; San Barnabe [219], 220; Ban Carlos, 222; Sangro do Oristo [2191; Sau Jos6 do los Miicbachos [219J, 220; San Juan de Rayas [218]; San Pedro [219J, 220, Sau Vicente [219], 220: St. Nicholas [219], 220; Santa Anita [218] Santa Clara [2191, 220; Santa In6s [507]; Santa Nino [2191, 220; Sccho [21BJ ; Tiro do Burgos [218] ; Tiro Viejo de San An- tonio [2181: Valeiiciana, 217; Vellarino, 220. Qmnero: Coronilla [5171; Nox- topecL516]; Pcdragal, 290 ; Iregoues, 514; Rosario, 516; Sau Augustin, 296; San Nicolas del Oro, 516; TopantitUm, 517. Jlulalgo : Barron [237]; CapulalOlOj ; El Chico [51(51 ; Exiciuo, 228; Las Navajas, 227 ; La Trinidad, 228 ; Maravillas, 229, [297]; Pachuca, 516 ; Real del Monte, 224 [327], 333 [516] ; Rosario, 228 ; San Juan E227J; San Nicolas, 228: Sau Itafaol, 238, 239; Santa Gortrudis mine, 229 [237], L833J; Santa Rosa [5161; Tepeuon [5161; Vizcaina, 229, 233; Xacal, 224, 227;

Index.

Zotol, 238. Jalisco : San Eafael, 516 ; Santo Domingo [516j ; TocatitMn, 515. Lower California : El Triunfo [514J ; San Antonio [514]. Nimo Ixon : list of silver- mines, 242 ; Sierra de Carrizal [500], Oaxaca : Taviches, 292, 297, 301, 519. Bina- loa: Palmarito, 426. Bonora: La Barranca [5141: Los Bronccs [514j; Matape, 294 ; San Javier [514]. Tepic : Cabrera [517] : Ixtian, 519 ; Zopilote, 515. Zaca- tecas: Chacoaco, 516 5 Fresnillo, 514, Penon Blanco, 514. {See also lead-silver mines.)

Silver-Ores: The Patio Process for Amalgamation, 276, 484.

Simpatica opal-mine, Queretaro, Mex., 64.

Sinaloa, Mex. : Bazonopa river, 455 ; copper-deposits, 177 [512] . Mazathln [267J Pal- marito silver-mine, 426, 446 , Santa Cruz de Alaya district, 296, 298.

Sinaloa and Ohihiahua, Notes on a Section Across the Sierra Occidental o/(Weed) [cxxvii],

Sinaloa, Notes on Certain Mines, 396.

Slag-granulation in Mexico [252].

Slimes Treated hy Cyanide Process, 179 et seq.

Smel ting- Works : Copper: Gananea, Mex., 435; Grand Porks, B. C., 354; Iron: Dn- rango,Mex., 156; Monterrey, Mex., 344; Lead: Aguascalieiitos, Mex. , ; Ar- gentine, Kans., 374; East Helena, Montana [353], 380 ; El Paso, Tex. [373] ; Mon- terrey, Mex., clxxxxiii [100], 243 [325] ; Omaha, Neb., 373 ; Perth Amboy, N J., 369 ; Pueblo, Colo. [353], 375; Salt Lake City, Utah 1353]; San Luis Potosi, Mex,, ; Santa Barbara, Mex., 477 ; Torreon, Mex. [353].

Smith, Mrs. Erminie A., Aumerican ethnologist L74J.

Soledad silver-mine, Chihuahua, Mex. [463J, 464.

Soledad y Anexas silver-lead-mine, Hidalgo, Mex,, 242.

Soloman, Capt. Tomas, address of welcome at Pachuca, Mex., clxxvii ct seq.

Sombrerete min iug district, Zacatecas [267] [316*1.

Sonnoschmid, Frederick, introduced amalgamation-methods in Mexico, 488, 489.

Sonora, Mex. : Altar district, 177 [326]; antimony-deposits, 508 , Caiianea district, 177, 428, 443, coal-fields [325] [499]; copper-deposits [512], 177, 428, 413; garnet, 57 [500] ; geograpliy and geology, 176; gold-mining, 178; gold-deposits [518] ; graphite, 498 j iron-oies, 503; kaolin-deposits [503]; Nacosari copper-mines, 176, 428; Notes on Certain Mines, 396; San Juan mine [325], Siena Azul mining district, 438, 443 ; Siena Pinitos gold-mines, 435 province of 1163], 176 to 178 , Eailroad, 264, 325, 326.

Soriano, Dr., presented Mexican topaz to Berlin museum [58 1.

South Wales, voin-rilling of lode.s of Cardiganshire, 286, 293.

Squicr. George P., arclueologist [74j.

Stamp-mills, 244 et scq., 259

Stanford, C. F., inventor of the louiid stamp [24r>|.

Statistics of the Mining and Metallanjical Uidmtry of the State of Naero Leon, Mexico [cxxxi], 241.

Steel-Plant at Monterrey, 3Ieuco (White) [cxxix I, 344.

St. Louis Smelting and Eofining Co., feeding-devices used by, ‘169.

St. Nicholas silver-mine, Guamyiiato, Mex. [219], 220,

Stephanito, Guanajuato, Mox. [220] [223].

Storms, W. H., on banded quartz, 294.

Strontium; distribution in Mexico, 502.

Structure of Ore-Bearing Veins in Mexico (Halse) [oxxixl, 285.

Study of Amalgamation Methods, Especially the Patio Process, with the Object of Avoiding the Loss of Mercury (Bustambntb) [cxxviii], 484.

Subterranean gold-placers, 12.

Sulphur : distribution in Mexico, 501 J mining concession for, 7.

Synopsis of the Mining Laws of Mexico (Chism.) [cxxviii], 3.

Tabasco, Mex. : hydrocarbons [499].

Tajo silver-mines, Parral, Chihuahua, Mex,, 474.

Index.

Tajitos gold-mine, SonoTa, Mex. [518].

Taniaulipas, Mcx. ; city of Tampico [2671 ; coal [499] , copper-deposits, 510 ; garnet [5001; gold-copper deposits, 520 ; hydrocarbons U 09 J . iron-ores [5041 , lead-depos- its [513] ; salt L502J.

Tampico, Mex.: excursion to, olxxxxii; city of [267 1.

Taraciega gold- and silver-mine, Chihuahua, Mcx. [465].

Taranguoha Caldas silver-mine. Chihuahua, Mex. [464].

Tares silver-mine, Chihuahua, Mex. [468].

Taviches : gold- and silver-mine, Oaxaca, Mex., 519 , district, 292, 297, 301 Tays, E. a. H., and Schiertz, F. A., The Treatment of Clay-Slimes by the Cyanide Pro- cess and Agitation [cxxvii], 179.

Tccali or Mexican onyx, 82, 89.

Tecatitldn silver-mines, Jalisco, Mex., 515.

Tecoletes silver-mine, Chihuahua, Mex., 462.

Tehuantepec : distance between commercial parts via, 307, 308 ; geology of the prov- ince, 178 ; Interoceanic Eailroad, 264, 306 to 311.

Tehuilotopec district, G-uorrero, Mex., 296.

Tojupilco, Mex.: beryl [500J.

Tellurium ; distribution in Mexico, 501.

Teneritos silver-mine, Chihuahua, Mex [464].

Tepautitliin silver-mine, Guerrero, Mex., 517.

Topic, Mcx.: copper-deposits [512], tellurium [501] , gold [518].

Tcpeiicnc silver-mines, Hidalgo, Mex. l516j.

Topotzotlan, Mcx., ancient city of, 275.

Tcfjiiixquiapan Chty, Queretaro, Mex., 272.

Torbuno gratings for lead blast-furnaces, 374.

Texas, cinnabar mines 11731.

The Valm of Ores in Mexico (Emmons) [cxxix], 94.

Tilinaun, liistoiucal details of Guanajuato l217].

Tin: Black Hills, South Dakota [506]; Bolivia [506i; Isle of Elba [506] ; Mexico, 506 ; niining concession for, 7 ; ores of San Luis Potosi, 481, 482 ; Tuscany [506]. Tiro B. silver-load-mino, Coahuila, Mcx., 103.

Tiro do Burgos silvcr-miiio, Guanajuato, Mex. [218].

T'iro Juarez silvor-lcad-mino, Coahuila, Mex., 103.

Tiro Viejo do San Antonio silvor-miue, Guauatjuato, Mex. 1218],

Tiro No. 10 silver-lead-miue, Coahuila, Mex., 125.

Tiro No, 11 silver-load-mino, Coahuila, Mex., 103, 125.

Todos Santos district, Chihuahua, Mex., 468.

Tojiaz : distribution in Mexico, 56, 92, 500.

Torrefm City, Coahuila, Mex. (2671 : smelters [1001.

Tourmaline not found in Mexico, 92.

'IVeainhent of Clay-Slimes by the Cyanide Process and Atfilalkm (Tavs and 8 (:hiertz) [cxxvii], 179.'

Tridymite, 232.

Trigueros silver-mine, Chihuahua, Mex, [468].

Trinidad silver-mine, Parral, Chihuahua, Mex., output, 474.

TMla, Hidalgo, M,ex. : city of, 273 ; excursion to, clxxxiii ; population of district, 473. Turquoise in Mexico, 59, 92 ; Now Mexico, 68, 80.

Tuscany : tin-doposits [506J.

Tylor, Edward B,, describes obsidian mines in Hidalgo, 84.

United Verde copper-mine, Arizona [177].

Urique silver-mine, Chihuahua, Mcx. [515].

Uslar, G. de, experiments with the patio process, 278, 281.

Valeneiana silver-mine, Guanajuato, Mex., 217.

Valentini, Philip J. J., on jadeite, 73.

Index.

Yalle de Santiago, City of Guanajuato, Mex. [271J.

Y(ilimtio)h of Ores in Mexico, 94.

Yanadium: distribution in Mexico, 506.

Yelardena gold-silver-mine, Cuencame, Durango, Mex. [500].

Yera Cruz, Mex. : GMlGhihuitl in [76], 78; copper-deposits [510] ; gold-coppor deposits, 520 ; Interoceanic Railroad, 321 et seq. ; Mexican Railroad, 311, 312.

Yeta Grande copper-mine, Cananea, Sonora, Mex., 434.

Yeta Grande gold-mine. Chihuahua, Mex., clxxi.

Yeta Madre system, Guanajuato, Mex., 217, 218.

Yeta Rica mine, Coahuila, Mex., 103, 108 et seq.

Yichena silver-mine, Chihuahua, Mex. [463].

Victoria, San Luis Potosi, Mex., mountain pass of, 166.

Victoria tunnel, Guanajuato, Mex., 222.

Fiews of an Old Smelter in the State of Morelos, JUexico (Peitchett) [cxxviii], 251.

Villa del Parral district, Chihuahua, Mex., 462.

Villarino silver-mine, Guanajuato, Mex., 220.

Vizcaina silver-mine, Pachuca. Hidalgo, Mex., 229, 233, 234.

Yolcan Dolores silver-lead -mine, Coahuila, Mex., 103, 121, 129.

Volcanic phenomena, 143, 170, 172.

Waters of Mexico, 335 , analyses, 338 et seq. ; Las Esperanzas, Coahuila, 139, 147 ; Mon- terrey, Nuevo Leon, 352.

Water-rights, 9.

Weed, Waltee Haevey, Notes on Cert am Mines in the States of Chihaahua, Sinaloa and Sonora, Me.vico [cxxviii, 396; Notes on a Section Across the Sierra Madre Oc- cidental of Chihuahua and Sinaloa, Mecico [cxxvii], 444.

Western Sierra Madre, Mexico, 175.

Wheeler, Zenos, inventor of the high mortar-box for stamp-mills [246].

White, William, Jr., The Steel Plant at Monterrey, Mexico [cxxix], 344.

WiTHERBEE, T. P., The Iron Mountain, and the Plant of the Mexican Ndional Iron and Steel Company, Durango, Mexico [cxxxi]. 156.

Xacal silver-mine, Pachuca, Hidalgo, Mex., 224, 227.

Xilotepec silver-mine, Chihuahua, Mex., 464,

Yellowstone Park, obsidian in [83].

Yucatan, railroad in, 331.

Zacatecas, Mex, : An adobe reverberatory furnace, 248 ; city of Camacho, 267 ; city of Zacatecas, clxxii, 268; copper-deposits, 511 ; district of Frcsuillo [267]; district of Nieves [267]; district of Sombrorcte [267]; district of Zacatecas, 268; garnet [500] ; gold- and silver-veins, 287 ; Gutierrez [267] ; lead-deposits, 513 ; Maza- pil Mts. [267]: mei’cury-deposits, 509; salt- plains of Calora [2671; silver-deposits, 174 ; tin-deposits [507] ; topaz, 58.

Zaragoza district, Chihuahua, Mex. [473].

Zaragoza silver-lead-mine, Nuevo Le6n, Mex., 242.

Zempoatepetl, aragonite in volcano of, 90.

Zimapin, Mex. : garnet [500] ; opal [63 J.

Zinc in Mexico : Coahuila, 125 ; mining concession fur, 7 ; Pachuca, Hidalgo, 238 ;

Santa Gertrudia zinc-mine, Nuevo Le6ii, 242.

Zoquital Mts., Pachuca, Hidalgo, Mex., 233.

Zopilote silver-mines, Tepic, Mex., 515.

Zotol silver-mine, Pachuca, Hidalgo, Mex., 238.

Zuloaga Mts., Mexico [267].