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By H. A. Gardner, G. B. Heckel

The principal use of barium sulphate is as an inert paint pigment.

Jan 1, 1915

Jan 1, 1894

Jan 1, 1929

Jan 1, 1895

Jan 1, 1887

AlbioN S. Howe, San Francisco, Cal. (communication to the Secretary*):—In discussing this paper, 'I mould suggest that. the dip for iron pipe be liquid asphaltum, instead of coal-tar and pitch. Asphaltum is superior to coal-tar, and the variety

Jan 1, 1905

By John W. Rushton

This month's article concludes the series with maintenance design considerations in secondary crushing, grinding, and flotation circuits.

Jan 4, 1978

The following list contains the names of members of whose deaths notices have been printed in MINING AND METALLURGY during the year ending April 1, 1939. Biographical sketches published in MINING AND METALLURGY are indicated in the last two columns.

Jan 1, 1944

PAST PRESIDENT WILLIS MCGERALD PEIRCE New York City PRESIDENT-ELECT AND TREASURER ANDREW FLETCHER New York City VICE-PRESIDENTS O B J FRASER, New York City J B MORROW,' Pittsburgh, Pa. J L GILLSON, Wilmington, Del L F REINARTZ, Middletown, O PHILIP KRAFT, New York City W THOMAS,' Tucson, Ariz.

Jan 1, 1952

Jan 1, 1946

Jan 1, 1940

[ ] [LOCAL SECTION CODE (Numbers indicate Sections) No. Section LI Alaska L50 Adirondack L2 Arizona L58 Arkansas L84 Balcones L66 Billings Petr. L3 Black Hills L4 Boston L76 Caracas L5 Carlsbad Potash L6 Central Appal. L60 Central N. Mex. L7 Chicago L79 CIM-AIME Calgary L82 CIM-AIME Edmonton L8 Cleveland L9 Colorado]

Jan 1, 1961

For the year ending February, 1918 PRESIDENT PHILIP N. MOORE ST. LOUIS, Mo. PAST PRESIDENTS WILLIAM L. SAUNDERS NEW YORK, N. Y. L. D. RICKETTS NEW YORE, N. Y. FIRST VICE-PRESIDENT SIDNEY J. JENNINGS, NEW YORK, N. Y. TREASURER GEORGE C. STONE, NEW YORK, N. Y. SECRETARY EMERITUS ROSSITER W. RAYMOND, NEW YORK, N. Y. SECRETARY BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 8, 1917

SINCE I have begun to tell you of the semiminerals that serve as colors, I wish to tell you of azure and green azure, so that you may know what they are. I tell you first that there are two kinds of azure, one called ultramarine blue by painters, and the other German blue. Ultra-

Jan 1, 1942

PRESIDENT WILLIAM L. SAUNDERS,1 NEW YORK, N. Y. PAST PRESIDENTS CHARLES F. RAND,1 NEW YORK, N. Y. BENJAMIN B. THAYER,3 NEW YORK, N. Y. FIRST VICE-PRESIDENT PHILIP N. MOORE,1 ST. Louis, Mo. TREASURER GEORGE C. STONE,1 NEW YORK, N. Y. SECRETARY EMERITUS ROSSITER W. RAYMOND NEW YORK, N. Y. SECRETARY BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 9, 1915

Jan 1, 1920

PRESIDENT WILLIAM L. SAUNDERS,1 NEW YORK, N. Y. PAST PRESIDENTS CHARLES F. RAND,1 NEW YORK, N. Y. BENJAMIN B. THAYER,2 NEW YORK, N. Y. FIRST VICE-PRESIDENT PHILIP N. MOORE,1 ..... ST. Louis, Mo. TREASURER GEORGE C. STONE,' NEW YORK, N. Y. SECRETARY EMERITUS , ROSSITER W. RAYMOND, NEW YORK, N. Y. SECRETARY BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 7, 1915

PRESIDENT WILLIAM L. SAUNDERS,1 NEW YORK, N. Y. PAST PRESIDENTS CHARLES F. RAND,1 NEW York , N. Y. BENJAMIN B. THAYER,2 . NEW YORK, N. Y. FIRST VICE-PRESIDENT PHILIP N. MOORE,1 ST. Louis, Mo. TREASURER GEORGE C. STONE,1 NEW YORK, N.Y. SECRETARY EMERITUS ROSSITER W. RAYMOND, NEW York, N. Y.

Jan 4, 1915

PRESIDENT. CHARLES F. RAND,1 NEW YORK, N. Y. PAST PRESIDENTS. CHARLES KIRCHHOFF,1 NEW. YORK, N. Y. JAMES F. KEMP,2 NEW YORK, N. Y. FIRST VICE-PRESIDENT. BENJAMIN B. THAYER,1 NEW YORK, N. Y. TREASURER. GEORGE C. STONE,' NEW YORK, N. Y. SECRETARY EMERITUS. ROSSITER W. RAYMOND NEW YORK, N. Y. SECRETARY. BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 7, 1913