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Jan 1, 1893

Jan 1, 1925

By William P. Blake

The occurrence of siderite in beds of considerable thickness in the clay formations of Martha's Vineyard, Mass., may have some economical importance, and is at least interesting in a scientific point of view.

Jan 1, 1965

Jan 1, 1942

Jan 1, 1953

Jan 1, 1946

PROGRESS IN DRILLING tungsten-carbide bits, lighter pneumatic drills, bonus plans, and alloy steels are discussed at northwestern gathering.

Jan 3, 1951

Jan 1, 1969

California Oil and Gas Association, 510 West Sixth St , Los Angeles, Calif Edwin Higgins, Secretary This Association for many years published the monthly magazine, "Oil Bulletin " Publication was discontinued in June, 1932, and numbers are now available only in reference form Some of the articles in the magazine dealt with the geology and natural resources of gas and oil

Jan 1, 1933

E. O?C. Acker Truman H. Aldrich John H. Allen W. Lawrence Austin W. S. Ayres David Baker Andrew A Blair Walter M. Brodie H.H. Burden Charles Butters

Jan 1, 1936

Minnesota J. A. MACKILLICAN, Chairman W. W. J. CROZE, Vice-chairman T. L. JOSEPH, Vice-chairman S. E. ATKINS, Secretary-Treasurer, Alworth Bldg., Duluth, Minn. Montana MURL H. GIDEL, Chairman ALBERT E. WIGGIN, Vice-chairman ALEXANDER M. MUDONALD, Secretary-Treasurer, 101 W. Granite St. Butte, Mont. GEORGE G. GRISWOLD FRANCIS A. THOMSON

Jan 1, 1929

By Fred M. Phillips

Jan 1, 1985

American Refractories Institute Oliver bldg., Pittsburgh, Pa. D. A. Dexter, Secretary. The Institute publishes a monthly Technical Bulletin carrying papers concerning. refractories. Nonmembers of the Institute may obtain them for 10 cents per copy. Five Technologic Papers have also been published; they are the results of research on refractories and may be obtained at a cost of 50 cents each.

Jan 1, 1933

Jan 5, 1976

Jan 1, 1922

Jan 1, 1917

Jan 1, 1904

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

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

Jan 1, 1915