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Jan 1, 1938

By H. B. C. Nitze

Monazite is a phosphate of the rare earths, cerium, lantha num, and didymium (Ce, La, Di)PO,. It also contains thoria (Tho,) and silica, which are present in varying percentages, probably as impurities.

Jan 1, 1896

By J. E. Warren, J. H. Hartsock

In the receipt of J. E. Warren and J. H. Hartsock's comments on our paper, "Aspects of Gas Deliverability", We wish to point out that all the physical characteristics we conceived as constant were absorbed in the gas deliverability constant of the individual well's performance, listed

Executive ROBERT E. TALLY, Chairman WILLIAM H BASSETT JOHN A. MATHEWS Louis S. CATER EDGAR RICHARD Finance HENRY KRUMB, Chairman H A GUESS H G. MOULTON Admissions ERLE V. DAVELER, Chairman GEORGE D BARRON H K MASTERS JOHN M. LOVEJOY P. A.-MOSMAN Alternates E. L. ESTABROOK C. E MEISSNER J. A. SINGMASTER FRED H. KAY

Jan 1, 1923

James W. Neill, Salt Lake City, Utah: Mr. Keller observes, in his interesting paper, that his copper mattes show a constant tenor of 21 to 23 per cent. sulphur; and continues," Many of these analy-

Jan 1, 1894

[Executive HENRY A. BUEHLER, Chairman ERLE V. DAVELER EDGAR RICHARD JOHN M. LOVEJOY WILLIAM WRAITH J. V. W. REYNDERS, Consultant Finance HENRY KRUMB, Chairman E. E. ELLIS PAUL D. MERICA H. G. MOULTON, Consultant]

Jan 1, 1936

Jan 1, 1954

Jan 1, 1910

By E. K. Landis

IK connection with the interesting paper of Mr. Glenn on "Sampling Ores Without Use of Machinery " (page 156 of the present volume), I venture to offer the results of ten years' experience in the sampling of iron-ore by a method adopted when I first became

Jan 1, 1892

PROF. COURTENAY DE KALB, Kingstou, Oat. (communication to the Secretary): It. may be due to some lack of carefulness in expression that Mr. Upham seems to imply that there

Jan 1, 1899

Jan 1, 1959

The attached tables show that in 1935 production of crude oil in Poland slightly decreased (minus 14,450 tons) and that gas production

Jan 1, 1936

A Progress Report of The Engineering Foundation, which is a history of the Foundation and a report of its activities, has been printed. A limited number may be obtained by members of the Institute by writing to the office of the Institute or to the Secretary of the Foundation.

Jan 11, 1919

By T. Sterry Hunt

In a paper presented to the Institute in 1881* I have discussed at some length the question of the " Hydrometallurgy of Copper," and among others, have noticed two methods, devised and patented by Mr. James Douglas and myself, for the extraction of copper

Jan 1, 1888

New Products Equipment

Jan 1, 1951

By William G. Neilson

Edward Nichols died at Dunkirk, N. Y., January 7, 1892, in the forty-second year of his age. In the maturity of his powers, actively employing the strength gained from the experiences of a busy lift., and occupying positions

Jan 1, 1893

New Mexico School of Mmes, and State Bureau of Mmes and Mineral Resources, Socorro, N. M E. H Wells, President and Director Available publications of the State Bureau of Mines and Mineral Resources of the New Mexico School of Mines are: Bulletin 4, Fluorspar in New Mexico (1928), 60 cents; 5, Geologic

Jan 1, 1933

[Allen -Sherman-Hoff Pump Co Third Cover Dee Carlton Brown. Advertising Allis-Chalmers Mfg. Co 228, 228,241 Compton Advertising, Inc. American Cyanamid Co James J. McMahon. Inc. American Manganese Steel Div., American Brake Shoe Co; 246 Fuller & Smith & Ross, Inc. Anaconda Copper Mining Co 229 Kenyon & Eckhardt Inc.]

Jan 1, 1952

By F. M. Lewis, R. B. Bhappu

In 1977 a paper was presented which reviewed the cost trends in producing copper by conventional processes for five years, 1972 through 1976. In this paper these costs have been updated to include the years 1977 and 1978.

Jan 1, 1982