Search Documents

By N. G. Johnson

ALL of us are only too familiar with the fact that first the defense program, and finally the war, required vastly increased production from existing sources, and the discovery and development of new sources of minerals and metals. For this vast program, the explosives industry was well prepared. I use the term "well prepared" to cover all the phases of explosives service, which include formulation, design, manufacture, distribution, and application.

Jan 1, 1944

Jan 1, 1909

Edgar Hall, Tenterfield, New South Wales (communication to the Secretary): Mr. Klepetko* asks for information showing at what percentage antimony and arsenic, as impurities, begin to affect injuriously the quality of brass.

Jan 1, 1899

By W. S. Ayres

By Brahm Prakash, R. Schuhmann

Chemical conditions for flotation and nonflotation of cassiterite and fluorite with oleic acid as collector and with alizarin dyes as modifying agents were studied by means of small-scale, vacuum-flotation tests. Artificial cassiterite was prepared for these tests by high-temperature methods, especially by crystallization from borax melts.

Jan 1, 1950

The Geological Society of America, 419 West 117th St., New York, N. Y. Charles-P. Berkey, Secretary. The only official publication of the Society is the Bulletin. It contains the Proceedings of the annual meeting of the Society, as well as the Proceedings of the affiliated societies?the Mineralogical Society of America, and the Paleontological Society?and of Section E of the American Association for the Advancement of

Jan 1, 1933

By Stephen G. Wright

Jan 1, 1985

By K. S. Choi, B. S. Shin

The adsorption characteristics of sodium silicate on scheelite, calcite, and fluorite minerals were investigated. Adsorption equilibrium took about 60 minutes. Adsorption data show that the masimum amounts of adsorption of sodium silicate occurs at about pH 9.8. The adsorptivity was in the order of calcite > fluorite > scheelite. The amount of adsorption of sodium silicate increased with the increase in temperature of sodium silicate solutions. The amount of adsorption of sodium silicate decreases in the low concentration range of ferrous sulfate, while in the high concentration range of ferrous sulfate, the adsorption of sodium silicate increases.

Jan 1, 1986

Jan 1, 1912

Jan 1, 1896

The following is an incomplete list of members and guests who called at Institute headquarters during the period Oct. 10, 1919, to Nov. 10,1919. Carl A. Allen, Salt Lake City, Utah. W. G. Mitchell, Montreal, Canada. M. M. Altmayer, Paris. Henry S. Munroe, Litchfield, Conn. A. E. Bellis, Major Ord., Springfield J. S. Negru, New York, N. Y. Armory, Springfield, Mass. Edmund Newton, New York, N. Y. R. S. Botsford, New York, N. Y. A. W. Newberry, Cleveland, Ohio. Henry S. Burnholz, Monterrey, Mexico. C. C. O'Harra, Rapid City, S. D. D. E. A. Charlton, New York, N. Y. Fred S. Porter, Philadelphia, Pa. C. C. Colburn, Denver, Colo. Donald A. Powell, Columbus, Ohio. C. V. Corless, Coniston, Ontario. Thomas T. Read, Washington, D. C. I. N. Daily, Seattle, Wash., W. L. Remick, Chrome, N. J. E. V. Daveler, Butte, Mont: Hallet R. Robbins, San Francisco, Calif. John Davis, Fairbanks, Alaska.' Milnor Roberts, University Station, E. W. Engelmann, Salt Lake City, Utah. Seattle, Wash. M. E. Erdofy, New York N. Y. Thos. S. Roberts, Lakehurst Proving W. F. Ferrier, Toronto, Canada. Grounds, N. J. H. A. Fisher, Pittsburgh, Pa. George B. Rodgers, Dobbs Ferry, N. Y. Walter Fitch, Sr., Eureka, Utah. John C. Rogers, Copper Cliff, Ontario. C. D. Grier, New York, N. Y. Joseph L. Rosenmiller, Bethlehem, Pa. A. Hibbert, London. . C. J. Saville, Portland, New South Wales. John E. Hodge, Minneapolis, Minn. W. A. Scheuch, New Jersey. W. E. Hopper, Newark, N. J. S. B. Shutts, Lynchburg, Va. M. R. Hull, McGill, Nev. E. W. Smith, U. S. Army. A. W. Ibbett, Trinidad, B. W. I. S. J. Speak, London. A. O. Ihlseng, Joplin, Mo. John. B. Stewart, Santiago de Cuba, Sherwin F. Kelly, Lawrence, Kans. Cuba. R. G. Knickerbocker, Logansport, Ind. S. A. Taylor, Pittsburgh, Pa. .M. H. Kuryla, Eureka Colo. Karl Thomas,' New York, N. Y. F. G. Lasier, Detroit, Mich. F. L. Torres, Eureka, Nev. David Lasuer, Elizabeth, N. J. Henry Traphagen, Toledo, .Ohio: H. H. Lauer, Allentown, Pa. W. D. Van Doren, Ottawa, Canada. J. Whitney Lewis, Care First Nat'l Bank, J. A. Vernon, Newport, R. I. Tulsa Okla James Wilding, San Francisco, Calif. James W. Love, Knoxville, Tenn. D. J. Williams, Butte, Mont. Dorsey A. Lyon, Washington, D. C. Harry J. Wolf, New York, N. Y. M. E. Martiner, Boston, Mass.. Dwight E. Woodbridge, Duluth, Minn. Benj. L. Miller, Bethlehem, Pa. Percy E. Wrighn, Seattle, Wash. W. G. Miller, Toronto, Canada. F. Yamada, Tokyo, Japan.

Jan 12, 1919

Jan 1, 1907

By H. J. Freyn

The American iron and settl manufacturer finds himself to-day barely at the threshold of enormous possibilities for practicing rational economy in the use of fuels.

Jan 1, 1915

By C. Grua, M. Gottlieb, E. M. Wewerka

The Purpose of this paper is to present an overview of research underway at the Los Alamos Scientific Laboratory to investigate some of the more attractive options for controlling trace element contamination of coal refuse drainages. * The control methods under consideration include chemical and physical methods to immobilize or remove undesirable contaminants prior to refuse disposal, the treatment of refuse disposal sites with attenuating agents to prevent the discharge of contaminated water, and the direct treatment of refuse drainage as it emerges from the refuse disposal site. The results from these laboratory studies suggest that many of these techniques are technically feasible for controlling trace element contamination of refuse dump drainage.

Jan 1, 1982

By C. McDermid

At the request of Mr. C. McDermid, Secretary of the Institution of Mining and Metallurgy, Salisbury House, London, E. C., England, the following reports of standardization committees are here republished. Mr. McDermid invites members of-the American Institute of Mining Engineers to write him and express their opinion of the various proposals made by the committees. COPY OF THE REPORT OF THE WEIGHTS AND MEASURES STANDARDIZATION COMMITTEE OF THE INSTITUTION OF MINING AND METALLURGY, as adopted by the Central Standardization Committee; Dec. 20, 1906, and submitted to the Council, Jan. 16, 1907.

Mar 1, 1907

On July 25, the first copper ore From American Smelting & Refining Co.'s Mission open pit nine was sent into the new 15,000-tpd concentrator : three clays later, the first rail cars containing the Mission concentrate were sent north to the smelter at Hayden, Ariz. Thus two y,ears after stripping was started, Asarco's new mine, located south of Tucson. went on stream several months ahead of schedule. The plant, designed and constructed by Western Knapp Engineering Co., is expected to be operating at full capacity about September 1. with present plans calling for the copper concentrate from Mission to be shipped to Asarco's smelters at Hayden and El Paso.

Jan 9, 1961

By Jack White

This paper gives details of the results - of careful testing carried out on two types of ball mills, conical trunnion overflow and cylindrical grate discharge, on identical ore. The object of the test work was to determine which ball mill was the most economical to install for future extensions to the Mufulira concentrator.

Jan 1, 1950

By R. E. Sabaski

Total grinding mill system life is dependent upon the original selections and specifications of its components: the mill, its drive, drive motor, motor control, and power system. This paper discusses the complex considerations involved and the critical decisions which must be made by the buyer, the mill manufacturer, and by the gear vendor during the proposal and ordering stages. Interrelations between the mill manufacturer and the gear vendor, application of ACMA standards, how drive standards and specifications are refined through steady-state and computer-simulated torsional analyses are included, along with correlational field testing, as demands for larger sizes challenge the current state of the art.

Jan 1, 1984

Jan 1, 1933

I-Mine Ventilation A. C. CALLEN, Chairman E. A. HGLBROOK, Vice-chairman H. I. SMITH, Secretary CLARENCE E. ABBOTT ALFRED W. HESSE FRANK H. PBOBERT GAM BRIGHT G. R. JACKSON GEORGE S. RICE THOMAS H. CLAGETT JAMES F. MCCARTHY E. J. RISTEDT . OSCAR A. GLASSER W. B. PLANK GERALD F. SHERMAN Coal Mining M. D. COOPER, Chairman HOWARD N. EAVENSON JOHN A. GARCIA THOMAS D. THOMAS CHARLES ENZIAN JAMES W. PAUL C. M. YOUNG JOHN J. RUTLEDGE

Jan 1, 1929