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Jan 1, 1949

Jan 1, 1898

Jan 1, 1922

[University or College Alabama, University of, University, Ala. California University of Berkeley Cal Carnegie inst. of Technology Pittsburgh Pa. Case School of Applied science, Cleveland, Ohio Colorado School of Mines Columbia University New York City Harvard University, Cambridge. Mass.]

Jan 1, 1928

By V. R. Garfias

After a series of fruitless negotiations, the Mexican Government, on March 18, 1938, decreed the expropriation of several oil companies, and took possession of the properties, offices and records not only of the expropriated companies but of others not legally expropriated. This condition prevails to date.

Jan 1, 1939

Jan 1, 1970

By V. R. Garfias

After a series of fruitless negotiations, the Mexican Government, on March 18, 1938, decreed the expropriation of several oil companies, and took possession of the properties, offices and records not only of the expropriated companies but of others not legally expropriated. This condition prevails to date.

Jan 1, 1939

Jan 1, 1930

A Report Of Current Activity In The Industry

Jan 7, 1951

By C. A. Stetefeldt

In my paper on "The Refining of Sulphides Obtained in the Lixiviation-Process with Hyposulphite Solutions," read at Cleveland, June, 1891 (Trans., xx., 37), I recommended the Roessler converter

Jan 1, 1893

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, 1942

Jan 1, 1926

Jan 1, 1948

Jan 1, 1916

Map

Jan 1, 1938

Jan 1, 1965

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

By J. S. Billheimer, H. H. Reamer, B. H. Sage

Jan 1, 1949