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Jan 1, 1879

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Jan 1, 1938

Jan 1, 1971

Jan 1, 1907

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Jan 1, 1907

Jan 1, 1888

Jan 1, 1927

By American Institute of Mining Engineers

Jan 1, 1948

Jan 1, 1960

United Engineering Trustees, Inc. TAMES L HEAD, '50 E C MEAOHER, '52 R M ROOSEVELT, '49 The Engineering Foundation F F COLCORD, '50 E A PRENTIS, JR , '48 R M ROOSEVELT, '49

Jan 1, 1952

Southern California Academy of Sciences, Los Angeles Museum, Exposition Park, Los Angeles, Calif Howard R Hill, Secretary. The Academy has published one book which should have mention: Southern California geology and Los Angeles earthquakes, by R T. Hill (1928) Price, $5.

Jan 1, 1933

By Robert Glass Cleland

[PARTIAL LIST OF DIRECTORS OF THE NICHOLS CHEMICAL COMPANY AND NICHOLS COPPER COMPANY: G. H. Nichols William H. Nichols, Sr. William H. Nichols, Jr. Charles W. Nichols E. Remington Nichols George Martin Luther John Brown Francis Herreshoff]

Jan 1, 1952

[United Engineering Trustees, Inc. ALBERT ROBERTS. '47 R. M. ROOSEVELT, '49 RALPH B. WILLIAMS, '48 The Engineering Foundation F. F. COLCORD. '46 M. A. PRENTIS. Jn.. '48 It. >I. ROOSEVELT. '49]

Jan 1, 1946

By Frank Soulé

Jan 1, 1900

Jan 1, 1969

By Rikuro Otsuka

TITANIUM is attacked slowly by hydrochloric acid," and corrosion rates decrease with time of exposure.' This behavior is due to the formation

Jan 1, 1958

New Products Equipment

Jan 7, 1953