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Jan 1, 1948

Jan 1, 1947

PROF RICHARD ÅKERMAN Stockholm, Sweden DR. FRANK DAWSON ADAMS Montreal, Canada PROF RICHARD BECK Friberg, Germany ANDREW CARNEGIR New York, N.Y. DR. JAMES DOUGLAS New York, N.Y. PROF HATON DE LA GOUPILLIERE Paris, France SIR ROBERT A. HADFEILD London, England PROF HANS HOFFER Leoben, Austria PROF HENRI LOUIS LE CHATELIER Paris France EZEQUIEL ORDONEZ Mexico City, Mexico ALEXANDRE POURCEL Paris, France DR. ROSSITTER W. RAYMOND New York, N.Y. DR. ING H. C. EMIL SCHROEDTER Dusseldorf, Germany JOHN E. STEAD Middlesborugh, England JAMES M. SWANK (Associate) Philadelphia, Pa. PROF DIMITRY CONSTANTIN TSCHERNOFF St Petersburg, Russia PROF TSUNASHIRO WADA Tokyo, Japan CHARLES D WALCOT Washingtion D.C.

Jan 1, 1917

JAMES A. BARR Consulting Engineer Mt. Pleasant; Tennessee Washington, D.C. BEHRE DOLBEAR G COMPANY Consulting Mining Engineers and Geologists 11 Broadway New York 4. N. Y. BLANDFORD C. BURGESS Registered Professional Engineer Mining Consultant Monticello, Georgia LENVILLE A. COLLINS Mining Engineer Uranium examinations Cable "Coins" 210 La Arcada Bldg. Santa Barbara, Calif.

Jan 1, 1952

EXECUTIVE COMMITTEE OF THE BOARD OF DIRECTORS C. H. MATHEWSON. Chairman PAUL D. MERICA, Vice-Chairman CHESTER A. FULTON CARROLL A. GARNER H. Y. WALKER FINANCE COMMITTEE OF THE BOARD OF DIRECTORS ERLE Y. DAVELER, Chairman WILBER JUDSON RUSSELL B. PAUL HENRY KRUMB, Consultant

Jan 1, 1943

Jan 1, 1935

[E. E. SCHUMACHER, Chairman ARTHUR PHILLIPS, Past-Chairman L W. KEMPF, Senior Vice-Chairman E. A. ANDERSON, Vice-Chairman H. A. MALONEY, Treasurer FRANK T..SISCO. Secretary 29 West 39th Street, New York 18, N. Y.]

Jan 1, 1946

Jan 1, 1940

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Jan 1, 1938

YEAR OF ELECTION 1913 FRANK DAWSON ADAMS Montreal, Canada 1921 WILLIAM CUTHBERT BLACKETT Sacnston, Durham, England 1920 HENRY STURGIS DRINKER Merlon Station, Pa 1921 FERDINAND FOCH Paris, France 1922 FEDERICO GIOLITTI Torino, Ttaly 1888 HATON DE LA GOUPILLIERE Paris, France 1906 SIR ROBERT A HADFIELD London, England 1921 FRANK WILLIAM HARBORD London, England 1921 HEINRICH O HOFMAN Cambridge, Mass 1917 HERBERT HOOVER Stanford University, Cal 1919 ROBERT W HUNT Chicago, ILL 1915 JAMES' FURMAN KEMP New York, N Y 1905 HENRI LECHATELIER Paris, France 1921 C MCDERMID London, England 1913 EZEQUIEL ORDONEZ Mexico City, Mexico 1909 ALEXANDRE POURCEL Paris, France 1911 ROBERT H RICHARDS Boston, Mass 1906 JOHN E STEAD Middlesbrough, England 1907 CHARLES D WALCOTT Washington, D C

Jan 1, 1923

Jan 1, 1903

By E. C. Kersey, R. J. Gennone

MetALLOGRAPHIC investigations of composites of zinc alloys and aluminum have been made to study the effects of various thermal treatments on the zinc-alloy grain size and diffusion of zinc into the core material. The use of various alloys of zinc has necessitated the development of a universal etchant which will allow microscopic examination of the zinc grain size regardless of the composition.

Jan 1, 1960

PRESIDENT HERBERT HOOVER, STANFORD UNIVERSITY; CAL. PAST PRESIDENTS SIDNEY J. JENNINGS NEW YORK, N. Y. HORACE V. WINCHELL MINNEAPOLIS, MINN. FIRST VICE-PRESIDENT EDWIN LUDLOW, NEW YORK, N. Y. TREASURER GEORGE D. BARRON NEW YORK, N. Y.

Jan 1, 1923

Jan 1, 1962

Jan 1, 1961

Jan 1, 1923

Jan 1, 1937

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Jan 1, 1938

EXECUTIVE COMMITTEE OF THE BOARD OF DIRECTORS M. L. Haider, Chalrman Phillp Kraft, Vice-Chairman T. B. Counselman Evan Just J. B. Morrow FINANCE COMMITTEE OF THE BOARD OF DIRECTORS Gall F. Moulton, Chairman L F Remartz I W M. Peirce INVESTMENTS Erle V. Daveler, Chalrman, '54 Henry Rrumb, '53 W. M. Peirce, '55 Gall F. Moulton, ex officu, Chairman, Finance Committee Andrew Fletcher, ex offrcio Treasurer, AIME

Jan 1, 1952