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NEW MEMBERS The following list comprises the names of those persons who became members during the period Dec. 10, 1918, to Jan. 10, 1919. ADAMS, W. W., Mine Supt., Cia. Minera Paloma y Cabrillas, Higueras,,Coah., Mexico. ANKENY, CLEMENT W., Golden Cycle Min. & Reduction Co., Colorado Springs, Colo. ARGUE, WILLIAM H Mech. Engr., Ohio Brass Co;, Mansfield, Ohio. ARTHUR, WALTER Chem. and Met., Garford Motor Truck Co., Lima, Ohio. BANGSER, WILLIAM, Supt., Treatment Dept., Bethlehem Steel CO., Bethlehem, Pa. BEACH, C: S Asst. Supt. and Engr., Kemmerer Coal Co., Frontier, Wyo. BEAVER, A. B., Chem. and Engr. of Tests, National Cash Register Co., Dayton, Ohio. BORRIES, WILLIAM J., Min. Engr., Gen'l Mgr., American Zinc & Slate Co., Picher, Okla. BOTSFORD, CLARENCE A., Acting Gen'1 Mgr., Mogollon Mines Co., Mogollon, N. M. BOTSFORD, GEORGE B., Asst. Supt., Sunrise Iron Mines, Colorado Fuel &. Iron Co., Sunrise,. Wyo. COLLINS, GEORGE N., Mine Shift Boss, New York & Honduras Rosario Min. Co., San Juancito, Honduras, Central America. COTS, HOMER, Resident Engr., Arkansas and Oklahoma Dist., Central Coal & Coke Co., Huntington, Ark. CRICHTON, WALTER CREIG, Min.. Engr., 20S Charleston National Bank, Charleston, W. Va.

Jan 2, 1919

NEW MEMBERS The following list comprises the names of those persons who became members during. the period Mar. 10, 1919, to Apr. 10, 1919. AFFLECK, B. F., Pres., Universal Portland Cement Co., 210 So. La Salle St., Chicago, Ill. BENSUSAN, ARTHUR J., The Ouro Preto Gold Mines of Brazil, Ltd., Passagem de Marianna, Minas Geraes, Brazil, S. A. BIERBAUM, CHRISTOPHER H., Cons. Engr., & Vice-pres., Lumen Bearing Co., Buffalo, N. Y . DEWITT, OSCAR E., Geol., Vinegar Hill Zinc Co., 622 North Court St., Platteville, Wis. DOTY, L. C Mine Supt., Bullion Beck & Champion Co., Box C, Eureka, Utah. ESPIE, FRANK F Burma Mines, Ltd., Namtu, Upper Burma, Asia. FOZARD, J. L., Gen'l Supt., Beatson Mines, Kennecott Copper Corpn., Latouche, Alaska. GRANT, BENERE Supt., Bulluhacker Min. Co., Butte Mont. HARDEL, JEAN A., Engr., French Government, 21 Rue du Colonel Moll, Paris, France. JANSSEN, WALTER A., Operating Mgr., Canadian Steel Foundries.Ltd., 120 St. James St., Transportation Bldg., Montreal, Canada. KNOWLES, RALPH Roy, Supt., Radium Plant, The Minerals Recovery Co., 457 So. Elati St. Denver Colo.

Jan 5, 1919

NEW MEMBERS The following list comprises the names of those persons who became members during the period Apr. 10, 1916 to May 10, 1916. ALLEN, WILLIAM R.... Pres., Boston and Montana Development Co., Butte, Mont. BARKER, EDGAR EARL, Min. Engr. Mine Supt., Chile Exploration Co., Chuquicamata, Chile, S. Amer. BAYLESS, JOHN Z., Met. Engr Alaska Gastineau Min. Co., Thane, Alaska. BLACKWOOD, ARTHUR E., Mgr., Sullivan Machinery Co., 30 Church St., New York, N. Y. BREYER, FRANK G., Chief Testing Dept., The New Jersey Zinc Co., (of Pa.), Palmerton Pa. CARPENTER, JAY A., Mill Supt... . West End Cons. Mining Co., Tonopah, Nev. CORLESS, GEORGE BRADFORD, Geol., Missouri Bureau of Geology and Mines, Joplin, Mo.

Jan 6, 1916

NEW MEMBERS The following list comprises the, names of those persons who became members during the period June 10 to July 10, 1914: Members ALDRICH, HAROLD W., Supt. of Leaching Plant, Washoe Red. Wks., Anaconda Copper Co., Anaconda, Mont. AYER, FRANK ASHTON, Mine Foreman.. ..Detroit Copper Co., Morenci, Ariz. BELL, ARTHUR F. L., Chief Engr., Associated Oil Co.., 817 Sharon Bldg., San Francisco, Cal. BERGMAN, JULIUS GUSTAF, Mech. Engr., Chief Draftsman, Arizona Copper Co. Morenci, Ariz. BURT, CURTIS F., Min. Engr., Pittsburg-Dolores Mining Co., Rockland, via Yerington, Nev. CALLAWAY SCOTT DAVID, Chem La Harpe Smelter Co., La Harpe, Kan. CAMPBELL, W. C., Min. Engr 4 Princess St., Roodeport, Transvaal, So. Af. CARROLL, GEORGE A., Genl. Mgr Kildare Min. Co., Manson, B. C., Canada. CARUTHERS, JOHN LYTLE, Min. Engr., Asst. Engr., St. Louis, Rocky Mountain & Pacific Co.. Raton. N. M.

Jan 8, 1914

NEW MEMBERS The following list comprises the names of those persons who became members during the month of December, 1913: Members ADAMS, CHARLES W., JR., Smelting, American Smelting & Refining Co., Murray, Utah. ARMSTRONG, FRANK H., Mechanical Engineer Vulcan, Mich. ARNOLD, JOHN B., Attorney-at-Law Room 840,200 5th Ave., New York, N. Y. BOYS, HARRY R., Mining Paso Robles, Cal. CAVANAGH, JOHN L., Min. Engr., Nova Scotia Steel & Coal Co.; Wabana, Newfoundland. CHOW, KAI CHI, Student 1120 Amsterdam Ave., New York, N. Y. CLARK, ARTHUR B., Mining Engineer 72 Harbour Bldg., Butte, Mont. CURLEY, JOHN R., State Mine Inspector P. 0. Box 633, Leadville, Colo. DAVIS, ANGUS W., Mining Engineer, Consolidated Mining & Smelting Company of Canada, Trail, B. C., Canada.

Jan 1, 1914

NEW MEMBERS The following list comprises the names of those persons who became members during the period Nov. 10 to Dec. 10, 1915: BARTH, ERNEST, Petroleum Geol Box 552, Tulsa, Okla. BEROLZHEIMER, D. D.,.Chemist; Librarian, Barrett Mfg. Co., 17 Battery Pl., New York, N. Y. BLIEK, PIERRE FRANCISCO, Mgr., Compania Minera de Oruro, Oruro, Bolivia, So. Amer. BLOCS, JAMES A., Met 1076 1st Ave., Salt Lake City, Utah. BULKLEY, RALPH G., Mine & Mill Supt.; The Montezuma Mines & Mills Co., Montezuma, Colo. BURRAGE, ALBERT CAMERON, JR., Met. Engr.; Director, 85 Ames Bldg., Boston, Mass. CABELL, CHARLES ARNOLD, Vice-Pres Carbon Coal Co., Carbon, W. Va. CHAPMAN, LEWIS CARL, Economic Geol Producer Oil Co., Houston, Tex. CHOFFEL, FLAVIEN AURELIEN, Mgr Ingersoll-Rand Co., Paris, France COY, HARLEY A., Mine Supt American Zinc Co., Mascot, Tenn. DITTMANN, C. 0. ADOLF, Cons. Engr., Beer, Sondheimer & Co., Inc., Santiago, Chile, So. Amer.

Jan 1, 1916

NEW MEMBERS The following list comprises the names of those persons who became members during the period Oct. 10, 1916 to Nov. 10, 1916. ANCHOR, HANS C., Supt., Dome Extension Mines Co., Ltd., South Porcupine, Ont., Canada. BABCOCK, EARLE J., Dean, College Of Min. Engrg., State Univ. Of N. Dak., Grand Forks, N. Dak. BIDDIS0N, P. McDONALD, Construction Engr., The Ohio Fuel Supply Co., 52 W. Gay St., Columbus, 0. BOISE, PAUL T., Asst. Mgr., Stimpson Equipment Co., Felt Bldg., Salt Lake City, Utah. BOURNE, RALPH H., Vice-Pres Whiting Foundry Equipment Co., Harvey, Ill. BROWN, EDWARD OTTO FORSTER, Min. Engr., 706-707 Salisbury House, London, E. C., England.

Jan 12, 1916

The official Institute reports for the year 1929 were distributed in pamphlet form at the Annual Meeting, February, 1930, and were later included in Section 2 of Mining and Metallurgy, June, 1930, and thus made available to the entire membership. Membership In its report the Admissions Committee set forth the changes in membership during 1929, as follows: Total membership, Jan. 1, 1928, 8582; elected and placed on rolls in 1929, including 59 reinstatements, 509; loss by resignations in 1929, 88; loss by death in 1929, 110; loss by suspension in 1929, 37; membership at end of year not including Student Associates, 8856. Distribution of membership: Honorary Members, 16; Members, 6590; Junior Members, 38; Associates, 1041; Junior Associates, 1033; Rocky Mountain, 138; total membership, Jan. 1, 1930, 8856; Student Associates, 150; total including student associates, 9006. Treasurer's Annual Report, Year of 1929 Statement of Receipts For the year ended December 31, 1929 Dues: Arrears............................................ $ 3,501.75 Current............................................ 97,257.12 New Members...................................... 5,721.50 Advance........................................... 1,970.79 $108,451.16 Initiation Fees.................................................. 7,436.OO Magazine Receipts: Advertising Gross Receipts........................... $40,610.81 Magazine Sales..................................... 3,799.84 44,410.65 Sale of Transactions Current........................... $ 2,985. 15 Sale of Special Editions Current........................ 5,147.82 Sale of Back Transactions and Special Editions........... 4,186.93 Sale of Year Book..................................... 65.50 Sale of Authors' Reprints.............................. 2,585.40 Sale of Pins and Fobs.................................. 14.73 Sale of Technical Publications.......................... 1,451.55 Sale of Bindings...................................... 3,949.13 20,376.21 Net Interest Received: On Bank Balance and Temporary Investments......... $ 2,595.04 On Lie Membership Fund........................... 3,223.43 On James Douglas Library Fund...................... 5,425.61 On General Reserve Fund............................ 2,015.58 13,259.66 Miscellaneous Receipts........................................... 335.80 Total Receipts................................................ $194,269.48

Jan 1, 1930

NEW MEMBERS The following list comprises the names of those persons who became members during the period Jan. 10, 1919, to Feb. 10, 1919. ADAMS, FRANCIS SPEARMAN, Supt., Power Dept., Anaconda Copper Min. Co.; Anaconda Mont. ALDERSON, G. E., Min. & Met. Engr 1317 Sloane Ave., Lakewood, Ohio. BENJOVSKY, T. D., Min. Engr., Cons. & Constr 2045 Vine St., Denver, Colo. BROPHY, OSCAR, Met 1523 S. Broad St., Philadelphia, Pa. BUTTRAM, FRANK, Chief Geol., Fortuna Oil Co., 424 Liberty National Bank Bldg., Oklahoma City, Okla. COCHRAN, R. B., Mine Supt., The Teziutlan Copper Co., Aire Libre Puebla., Mexico. CONNAR, T. C., Civ. & Min. Engr. & Geol.; Chief Engr., Zanesville Coal Co., Zanesville, Ohio. DAVE, E. O Capt., Co. A, 212th Engineers, Camp Devens, Mass. FOLEY, CHARLES B., Electro-Met., Martin Rockwell Corpn., 347 Madison Ave., New York,. N. Y. HOSFORD, WILLIAM F., Asst. Tech. Supt., Western Electric Co., Inc., Hawthorne Station, Chicago, Ill. HOSTER, M. T., Supt., French Creek Mines, E. & G. Brooke Iron Co., St. Peters, Pa. KAWASAKI, SHIGETARO, Chief Geol., Geological Survey of Chosen, Government General of Chosen, Keijo. Korea.

Jan 3, 1919

[Adams, Dell H Consolidation Coal Co., 3300 One Oliver Plaza, Pittsburgh, Pa. Adams, Douglas K General Electric Co., P.O. Box 2331, Denver 1, Colo. Adams, Kenneth L Peabody Coal Co., 33 Carnation Dr., Belleville, Ill. Ahlborg, William Joy Mfg. Co., 580 Denver Club, Bldg., Denver, Colorado Albrechtsen, Ray H Mt. States Resources Corp., 2330 S. Main, Salt Lake City, Utah Allen, Dr. Harry C U. S. Bureau of Mines, Washington, D. C. 20242 Amerman, Richard W Utah Cons. & Mining Co., Box 155, Fruitland, New Mexico Anderson, G. A Walker Bank & Trust Co., 848 N 3rd E, Price, Utah Anderson, John S. Utah Cons. & Mining Co., 550 California St., San Francisco, Calif. Anderson, Robert Mine Safety Appliances Co., 1881 West N. Temple, Salt Lake City, Utah]

Jan 1, 1971

[Abbott, Jay Union Supply Co., 7458 So. Jackson St., Denver, Colo. 80122 Achziger, Ronald H Midwest Rubber & Supply Co., 6404 E. 39th Ave., Denver, Colo. 80207 Acre, Lee Dorchester-Colomine, 2944 Hwy 6 and 24, Grand Junction, Colo. 81501 Adams, Robert W Energy Fuels Corp., 3 Park Central, Suite 900, Denver, Colo. 80202 Adams, Dell H Consolidation Coal Co., Consol Plaza, 1800 Washington Rd., Pittsburgh, Pa. 15241 Adams, Douglas K General Electric Company, P.O. Box 2331, Denver, Colo. 80201 Adams, E. E Armco Steel Corp., Box 53, Parker, Colo. 80134 Ahlborg, William Joy Mfg. Co., 26 Sedgwick Dr., Englewood, Colo. 80110 Albrecht, Wayne H North American Coal Corp., Kirkwood Office Tower, Bismarck, N.D. 58501 Albrechtsen, Ray H. Mountain States Resources Corp., 1399 So. 700 East, Suite 11, Salt Lake City, Utah 84105 Alke, R. J Westinghouse Elec. Corp., 55 West 5th Ave., Denver, Colo. 80204 Allen, Thomas S Construction Machinery, Inc., 6121 Clermont, Commerce City, Colo. 80022 Allison, Thomas W Gullick Dobson International, 603 Parkway View Dr., Pittsburgh, Pa. 15205 Allmendinger, James W Falkirk Mining Co., P.O. Box 731, Riverdale, N.D. 58565 Almarez, John Jeffrey Mfg. Div., Dresser Industries, 720 So. Colorado Blvd., Denver, Colo.80222 Althouse, John G Coteau Properties Co., 2400 Astronaut Dr., Bismarck, N.D. 58501 Amundson, Adolph L. Western Slope Carbon, University Club Bldg., Suite 2240, Salt Lake City, Utah 84111 Anderson, Andy Power Motive Corp., 5000 Vasquez Blvd., Denver, Colo. 80216 Anderson, Carl L Industrial Screen & Maint., Inc., 1680 Sherrelwood Dr., Denver, Colo. 80221 Anderson, Charles W. R. Stamler Corp., 600 Main Street, Millersburg, Ky. 40348 Anderson, Daven Energy Engineering, Inc., P.O. Box 33, River Forest, Ill. 60305 Anderson, Forrest S Anderson Mavor (U.S.A.) Ltd., 303 Progress St., Cranberry Ind. Park, Zelienople, Pa. 16063]

Jan 1, 1979

[Abbott, Jay Union Supply Co., 5460 Colo. Blvd., Denver, Colo. 80022 Achziger, Ronald H Midwest Rubber Co., 6404 E. 39th Ave., Denver, Colo. 80207 Adams, Bob Energy Fuels Corp., Box G, Steamboat Sprlngs, Colo. 80477 Adams, David Empire Energy Corp., Box 68, Craig, Colorado 81625 Adams, Dell H Consolidation Coal Co., 3300 One Oliver Plaza, Pittsburgh, Pa. 15222 Adams, Douglas K General Electric Co., P.O. Box 2331, Denver, Colorado 80201 Adams, Kenneth L Arch Mineral Corp., 33 Carnation, Belleville, Ill. 62221 Ahlborg, William Joy Mfg. Co., 1911 Denver Club Bldg., 518-17th St., Denver, Colo. 80202 Albert, Darrell Safety Appliances Co., 400 Penn Center Blvd., Pittsburgh, Pa. 15235 Albrechtsen, Ray H Mountain States Resources Corp., 1399 So. 700 East, Suite 11, Salt Lake City, Utah 84105]

Jan 1, 1975

[Adams, Douglas K General Electric Co., P.O. Box 2331, Denver 1, Colo. Adams, Frank E U.S. Steel, 919 Kearns Bldg., Salt Lake City, Utah Alger, Van Kaiser Steel, Sunnyside, Utah Allan, Andrew Thompson Creek Coal & Coke Corp., Glenwood Springs, Colo. Allen, Earl W Mine Safety Appliances Co., 257 Rio Grand St., Salt Lake City, Utah Allen, Thomas Chief State Coal Mine Inspector, State Services Bldg., Denver, Colo. Anderson, Nephi W :Book Cliffs Coal Co., Dragerton, Utah Anderson, W. J Texaco, Inc., 845 N. 5th E., Price, Utah Ankeny, Marling J U. S. Bureau of Mines, 5308 Roosevelt St., Bethesda, Md. Arentzen, E. M Lee-Norse Co., Charleroi, Pa. Arentzen, L. E Lee-Norse Co., 2975 18th St., Boulder, Colo:]

Jan 1, 1961

[Adams, Frank E U.S. Steel Corp., 919 Kearns Bldg., Salt Lake City, Utah Alger, Van Kaiser Steel, Sunnyside, Utah Allan, Andrew Thompson Creek Coal &Coke Corp., Glenwood Springs, Colo. Allen, Earl W Mine Safety Appliances Co., 257 Rio Grand St., Salt Lake City, Utah Allen, Thomas Chief Coal Mine Inspector, Colorado, Argonaut Hotel, Denver 2, Colo. Anderson, Merlynn D U.S. Fuel, P.O. Box 5022, Dragerton, Utah Anderson, Nephi W Book Cliffs Coal Co., Dragerton, Utah Ankeny, Marling J Bureau of Mines, 5308 Roosevelt St., Bethesda, Md. Arentzen, E. M Lee-Norse Co., Charleroi, Pa. Arentzen, L. E Lee-Norse Co., 2975 18th St., Boulder, Colo.]

Jan 1, 1959

[Adams, Dell H Consolidation Coal Co., 43 Denver Tech Center, Englewood, Colo. Adams, Douglas K General Electric Co., Box 2331, Denver, Colo. Adams, Kenneth L Peabody Coal Co., 33 Carnation Dr., Belleville, Ill. Aggen, Marshall J Marathon LeTourneau Co., Rt. 4, Box 1188, Henderson, Texas Ahlborg, William Joy Mfg. Co., 580 Denver Club Bldg., Denver, Colo. Albrechtsen, Ray H Mt. States Resources Corp., 2330 So. Main, Salt Lake City, Utah Alford, Eugene C Pittsburg & Midway Coal Mining Co., 2025 TenMain Center, Kansas City, Missouri Allen, Earl W Mine Safety Appliance Co., 5708 East 7th St., Tucson, Arizona Alston, George Mine Safety Appliances Co., 400 Penn Center Blvd., Pittsburgh, Pa. Amerman, Richard W Utah International, Inc., Box 155, Fruitland, New Mex. Anderson, G. A Walker Bank & Trust Co., Drawer M, Price, Utah Anderson, John S Utah International, Inc., 550 California St., San Francisco, Calif. Anderson, Robert Mine Safety Appliances Co., 1881 West North Temple, Salt Lake City, Utah]

Jan 1, 1973

[Adams, E. R Rock Springs, Wyoming Adams, V. H. 422 East San Miguel Street, Colorado Springs, Colorado Allen, Earl W 257 Rio Grande Street, Salt Lake City, Utah Allen, Louis B . Box 1920, Denver 1. Colorado Allen, Thomas Argonaut Hotel, Denver, Colorado Alston, G. L Mine Safety Appliances Company, Pittsburgh, Pa. Ambler, J. B Box 591, Denver, Colorado Apperson, A. B. 394 Elm Street, Denver 7, Colorado Arnett, L. L. 325 North First West, Price, Utah Audin, Abel Somerset, Colorado Audin, Clement, Jr Paonia, Colorado Audin, Clement, Sr Box 627, Paonia, Colorado Audin, Ralph Box 285, Somerset, Colorado]

Jan 1, 1952

NEW MEMBERS. The following list comprises the names of those persons who became members during the month of March, 1913 BAECHTOLD, CHARLES A., Engr 9G Liberty St., New York, N. Y. BRANTLY, JOHN E., Instructor in Geology Tuscaloosa, Ala. CADDY, JAMES P., Net., ,Lake View & Star, Ltd Fimiston, West. Australia. LONERGAN, PHILIP J., JR., Prof. of Mining, Government University, Peking, China. MCKANNA, EDWIN A., Min. Engr P. 0. Box 834, Oklahoma City, Okla. MACDONALD, ANGUS W., Supt. Labor Dept., Dominion Coal Co., Ltd., 21 Queen St., Sydney, N. S., Canada. TSUBOI, Yoshio, Min. and Met. Engr., Kosaka Mine, Fujita Co., Akita-ken, Japan.

Jan 4, 1913

Due to the advanced date of publication of this Bulletin, the lists of new members, changes of address, etc., for the month of July will be printed in the September number of the Bulletin. CANDIDATES FOR MEMBERSHIP. The following persons have been proposed during the period July 1-20, 1913, for election as members of the Institute. Their names are published for the information of members and associates, from whom the Committee on Membership earnestly invites confidential communications, favorable or unfavorable, concerning these candidates. A sufficient period (varying in the discretion of the Committee, according to the residence of the candidate) will be allowed for the reception of such communications, before any action upon these names by the Committee. After the lapse of this period, the Committee will recommend action by the Council, which has the power of final election.

Jan 8, 1913

NEW MEMBERS. The following list comprises the names of those persons who became members during the month of flay, 1913: Members. BASTIN, EDSON S., Geol U. S. Geological Survey, Washington, D. C BUCHERER, Louis, Cons. Engr Apartado 1471, Mexico City, Mexico. BURDICK, CHARLES A., Min. Engr 74 Broadway, New York, N. Y. CARR, HOMER L., Min. Engr 109 W. 88th St., New York, N. Y. CARTER, RUSSELL S., Mech. Engr. & Asst. Gent Mgr., Ingersoll-Rand Co., 11 Broadway, New York, N. Y.

Jan 6, 1913

By Larry A. Lien

Membrane technology has been available for about 30 years, but has been used very sparingly within the general mining industry. However, recent developments in polymer chemistry, spiral wound element construction, pretreatment equipment and element cleaning techniques have improved the reliability and robustness of membrane based systems. These improvements have expanded the potential to use this "new" technology to enhance critical recoveries of gold and silver in heap leaching operations or in the extraction circuit. Another opportunity for the mining industry will be to use membrane technology in new processes like controlling organic acids or ammonium thiosul­fate to enhance gold and silver extraction during leaching opera­tions. Finally, the most common use for membrane technology is for the control of mining water balance and acid mine drainage issues. Polymeric membranes, specifically thin-film composites, have been developed that will purify, fractionate or concentrate gold or silver. Recent applications have been developed for spi­ral wound modules that operate across the pH spectrum from 0 to 14. Systems using membranes have been constructed that operated on feed streams from 200° C to 3000 centipoise. Most recently, membrane based systems have been pilot tested suc­cessfully to purify solvents, like LIX. Opportunities exist to apply membrane technology to concen­trate gold and silver cyanide solutions with thin-film composite Reverse Osmosis (RO) membranes at elevated pH values above 10. Incorporating membrane technology could allow one to increase production without incurring additional expansion of the gold extraction side of the process. Furthermore, free cyanide is not rejected by the Reverse Osmosis membranes, but other inorganic salts are rejected 98+%, thereby, allowing an essentially ion free, except for the free cyanide, to be recirculat­ed back to the heap leach operation for enhanced extraction.

Jan 1, 1998