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Congress has authorized the President to control the supply and distribution of the following: Antimony, arsenic, ball clay, bismuth, bromine, cerium, chalk, chromium, cobalt, corundum, emery, fluorspar, ferrosilicon, fullers' earth, graphite, grinding pebbles, iridium, kaolin, magnesite, manganese, mercury, mica, molybdenum, osmium, sodium, platinum, palladium, paper clay, phosphorus, potassium, pyrites, radium,

Jan 12, 1918

Jan 1, 1926

Jan 1, 1951

Jan 1, 1941

Jan 1, 1947

Jan 1, 1947

The following list contains the names of members of whose deaths notices have be received at the Secretary's office between Jan. 1, 1935, and April 1, 1936. Bio¬graphical sketches published in MINING AND METALLURGY are indicated in the last two columns.

Jan 1, 1936

Jan 1, 1908

Jan 1, 1942

Early data about the amounts of coal used in making coke, and even of the first oven plants are meager. Table 84 shows the data about beehive ovens from 1841 to 1940, inclusive, and Table 85 shows the data about byproduct ovens from 1895 to 1940, inclusive.

Jan 1, 1942

MINING ASSOCIATION, UNIVERSITY OF CALIFORNIA At a meeting of the Mining Association of the University of California, held Feb. 12, officers for the present semester were elected as follows: President, Richard C. Kerr, '19; vice-president, Glen T. O'Brien, '20; secretary, Kenneth V. King, '19; treasurer, Sam Grinsfelder, '20. KENNETH V. KING, Secretary.

Jan 4, 1919

Jan 1, 1952

Jan 1, 1958

Jan 1, 1969

By Magnus Troilius

The following is a very rapid method for determining copper in steel. I have found it to give results very closely agreeing with those obtained by galvanic precipitation of the copper. Five grams of steel are dissolved in a mixture of 100 C.C. of water and 10 C.C. of sulphuric acid. When all is dissolved, add 2 C.C.

Jan 1, 1883

SALT LAKE CITY MEETING The One Hundred and Eighth Meeting of the Institute, for the presentation and discussion of technical papers, will be held at Salt Lake City, Utah, August 10 to 14, 1914. ALL PAPERS TO BE PRESENTED AT THIS MEETING MUST BE IN THE HANDS OF THE SECRETARY ON OR BEFORE MAY 31, 1914.

Jan 3, 1914

Jan 1, 1953

By J. T. Richards

ELASTIC constants, including E-modulus, G-modulus, Poisson's ratio, and compressibility, are affected by temperature, but not necessarily to the same degree nor in the same direction. Theoretical expressions relating the temperature coefficients for the various elastic constants have been introduced by Gruneisen. In considering the thermoelastic characteristics

Jan 1, 1955

Jan 1, 1914