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By H. W. Turner

In addition to the deposits mentioned by Mr. Lindgren? the following may be noted: 1. In the " Dardanelles quadrangle," of the map of the U. S. Geological Survey, 3 miles NW. of Tower Peak, there is a considerable mass of quartzite, marble, and dark, fine-grained. gneiss. At the edge of the coarsely crystalline white marble, having a width of about 400 ft., is a white schistose rock, which,

Jan 1, 1904

[University of Alabama University, Alabama Mining and Metallurgical Society (Inactive) University of Arizona Tucson, Arizona Miners' Society ROBERT HIGH, President RICHARD FLAGG, Secretary J. B. CUNNINGHAM, Faculty Sponsor Birmingham-Southern College Birmingham, Alabama Geology Journal Club (Inactive)]

Jan 1, 1946

The curve of Fig. 3 for pyrite requires modification. There 11% a range of pH values from 6.2 to 7.8 for which no cyanide is required to prevent contact. From 7.8 to 11.3 a small amount of cyanide is required, with a sharp maximum of 20 mg. per liter at pH=9.6. The mistake arose from considering too few solution compositions (17 were considered) in constructing the curve. Subsequent work with other collectors indicates that the corrected curve is typical for such systems; it illustrates the further development of the dip in the pyrite curve of Fig. 5.

Jan 1, 1938

Jan 1, 1929

Jan 1, 1934

Jan 1, 1937

By H. M. Zoerb

Based on the belief that operating details are a definite contributing factor to major economies, this paper traces the development of crushing cavity design in Symons cone crushers to attain maximum liner utilization. Wear rates are analyzed and compared in this presentation and drawings illustrate succeeding design changes.

Jan 6, 1953

US 4,185,077 - In the recovery of uranium from a solution produced by leaching uranium ore, the leach liquor is contacted with a polymeric crosslinked vinyl benzyl chloride anion exchange resin and eluted with sulfuric acid to recover uranyl sulfate Such a resin is resistant to attrition and thermal degradation during elution. R.L. Albright, assigned to Rohm & Haas Co Jan. 22, 1980. 6 pp (423-7). Filed: 10-31-75 (627,829).

Jan 1, 1982

By Clement K. Chase, F. Milton Lewis, Roshan B. Bhappu

Abstract-In this paper an attempt has been made to review the cost trends in producing copper by conventional milling, smelting and hydrometallurgical means during the last five years. The primary objectives of this cost analysis are to provide a base for future projections as well as to indicate which cost items are more volatile in their influence on overall cost of producing copper.

Jan 4, 1978

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Jan 1, 1938

Engineering Experiment Station, Ohio State University, Columbus, Ohio For publications, send requests and remittances to The University Press, Ohio State University, Columbus, Ohio. A few of the Bulletins of the Engineering Experiment Station will be of direct interest to mining engineers and geologists Bulletin 29, Coal losses in Ohio (1925), 25 cents, 33, A plan of a cooperative sliding scale of wages as applied to bituminous coal mining (1926), 10 cents, 46, The carbonization of Ohio coals (1928), $1; 63, Ohio coal investigation- pt 1, Hocking Valley coal (1931), 50 cents; 67, The Lawrence clay of Lawrence County (1932), 50 cents

Jan 1, 1933

Mr. Address Member is hereby proposed by the undersigned, as a Associate Junior Member of the American Institute of Mining Engineers. Signature of three Members or Associates (not Junior Members). Place of birth Year of birth Education, when, where and how acquired, with degrees, if any. A technical education is not requisite for membership. Dates. Please give record of experience on following page with dates; for example, in the form used by "Who's Who In America" and similar publications.

Jan 12, 1917

Mining Methods JAY A. CARPENTER, Chairman CLYDE E. WEED, Vice-Chairman ROY A. HARDY, Secretary Alluvial Mining CLINTON BERNARD O. B. PERRY NORMAN CLEAVELAND C. M. ROMANOWITZ R. B. EARLING J. B. STAPLER BENERE H. GRANT CHARLES THURMAN Open-Cut Mining Iron G. E. DIEHL EARL E. HUNNER P. G. HARRISON G. E. LEVEQUE Copper LOUIS BUCHMAN W. H. GOODRICH J. H. DAVIS WALTER S. LARSH

Jan 1, 1941

[Trans. No. Place Date Vol. Page 1. Wilkes-Barre, Pa.* May, '71.. 1 3 2. Bethlehem. Pa Aug., '71.. 1 10 8. Troy, N. Y Nov., '71.. 1 1S 4. Philadelphia, PaFeb., '72.. 117 5. New York, N. Y.*May: '78.. 120 5. Pittsburgh, PaOct., '72.. 125 7. Boston, MassFeb., '78.. 128 8. Philadelphia, Pa.* May, '78.. 2 3 9. Easton, POct., '78.. 27 10. New York. N. YFeb.. '74.. 2 11]

Jan 1, 1946

Report was made by the Committee of National Engineering Societies on the Reserve Corps of Engineers and it was voted that a committee of - three be formed-consisting of the President of the Institute, Dr. Henry -S. Drinker and the Secretary of the Institute-to select members in different parts of the country to-advise with the local U. S. Engineer Officers as to qualifications of applicants for the Reserve Corps of Engineers.

Jan 8, 1916

[University of Alabama University, Alabama Mining and Metallurgical Society Meets first and third Mondays each month WILLIAM L. ALLMAN, President L. M. LOTOTZIY, Secretary J. R. CUDWORTH, Faculty Sponsor RICHARD L. BOWRON, Counselor University of Arizona Tucson, Arizona Miners' Society HARRY GARRETT, President AL WALLACH, Secretary A. J. THOMPSON, Faculty Sponsor E. D. GARDNER, Counselor Birmingham-Southern College Birmingham, Alabama Geology Journal Club WALTER WOLF, President LELAND CULLIGAN, Secretary R. S. POOR, Faculty Sponsor A. J. BLAIR, Counselor]

Jan 1, 1940

By P. Payson

EMBRITTLEMENT of hard-tempered martensite (500°F embrittlement) appears to be coincident with the beginning of the third stage of tempering. During the first stage, primary martensite of steels containing over 0.25 pct C decomposes to a mixture of c carbide and martensite of appreciably constant carbon content close to 0.25 pct.' During the third stage of tempering, cementite forms. In steels with

Jan 1, 1955

There is plenty of sulphur available but not at the price currently being paid for brimstone. Immediate shortages may be felt before the market adjusts, making marginal sources and by-product sulphur and acid available. (See P. 403) Government aid for mineral exploration is available and regulations governing applications are available from The Defense Minerals Administration, Dept. of Interior. lust ask for M0-5 and also for the contract form which is MP-103.

Jan 5, 1951

By M. R. J. Wyllie

In a recent publication1 wetting phase relative permeability was exvressed as: and it was stated that a similar expression applied, mutatis mutandis, to non-wetting phase relative permeability; i.e., In Equations (1) and (2), Sw and S0 are respectively the wetting and non-wetting phase saturations as a fraction of the pore volume; PC is the capillary pressure; I; the wetting phase electrical resistivity index; IN, the analogous non-wetting

Jan 1, 1951

By E. C. Pechin

AT the suggestion of some members of the Institute, attention is called to the record of the working of Dunbar Furnace during the twelve months ending in January, 1874. During this period, with a product of over eleven thousand gross tons, not a single ton of

Jan 1, 1874