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NORTH AMERICA Number Members Alaska 31 Canada 333 Mexico 186 Newfoundland 2 United States Alabama 60 Arizona 171 Arkansas 10 California 769 Colorado 196 Connecticut 106 Delaware 21 District of Columbia 139 Florida 17 Georgia 6 Idaho 72 Illinois 260 Indiana 63 Iowa 10 Kansas 33 Kentucky 38

Jan 1, 1932

By Robert H. Richards

Jan 1, 1883

[United States PAGE Alabama 242 Alaska 242 Arizona 1 242 Arkansas 243 California 243 Colorado 246 Connecticut 248 Delaware 248 District of Columbia 248 Florida 248 Georgia 249 Idaho 249 Illinois 249 Indiana 250 Iowa 250] [ ]

Jan 1, 1925

By W. H. Gauvin, N. J. Themelis

Jan 1, 1963

ALABAMA Altoona -Cain, J Anniston-Cowie, L K Hermrod, A A White, H E Bessemer -Abbott, C E Ball, E M Mitchell, F R Thompson, N E Birmingham -Adler, J E Aldrich, T H Aldrich, T H, Jr Blackburn, A R Bush, M W Clark, G H Cowrn, P G Crane, W R Crawford, G G Crockard. F H

Jan 1, 1923

By J. J. Bodmer

The four different modes, more or less practiced for subdividing slag (that is, producing slag sand), are the following: 1. Crushing the slag from the lump in Blake's crusher, by edge runners or other suitable means. 2. Blowing water, steam, cold or hot air, into the stream of viscous slag whilst it runs from the furnace. So treated, the slag takes

By Amos Bowman

In the last two years I have had an opportunity to study the conditions of gold-mining in the far northwest of the Pacific coast —in Cariboo district, British Columbia. That country joins Alaska

Jan 1, 1887

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Jan 1, 1938

By Zay Jeffries

Jan 1, 1930

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Jan 1, 1938

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Jan 1, 1938

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,1 NEW YORK, N. Y. SECRETARY EMERITUS. ROSSITER W. RAYMOND NEW YORK, N. Y. SECRETARY. BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 10, 1913

PRESIDENT BENJAMIN B. THAYER,2 NEW YORK, N.. Y. PAST PRESIDENTS JAMES F. KEMP,1 NEW YORK, N. Y. CHARLES F. RAND,2 .NEW YORK, N. Y. FIRST VICE-PRESIDENT SIDNEY J. JENNINGS,1 NEW YORK, N. Y. 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, 1914

By W. M. McKewan

Jan 1, 1962

PRESIDENT BENJAMIN B. THAYER,1 NEW YORK, N. Y. PAST PRESIDENTS JAMES F. KEMP,1 NEW YORK, N. Y. CHARLES F. RAND,2 NEW YORK, N. Y. FIRST VICE-PRESIDENT SIDNEY J. JENNINGS,1 NEW YORK, N. Y. 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 1, 1915

By H. W. McCue, Henry Rogatz

Oil.—During the year 1939, there were 365 oil wells drilled in the Texas Panhandle, with a total daily initial production of 130,968 bb1.— that is, 69 fewer oil wells drilled than in the previous year, with a decrease. in total daily initial production of 61,738 bbl. The total daily potential of the field on Dec. 5, 1939, as determined by the Texas Railroad Commission, was 1,344,677 bbl., an increase of 94,032 bbl. over the previous year. On Dee. 5, 1939, a daily allowable of 130,527 bbl., which was an

Jan 1, 1940

By Henry Rogatz, H. W. McCue

Oil.—During the year 1939, there were 365 oil wells drilled in the Texas Panhandle, with a total daily initial production of 130,968 bb1.— that is, 69 fewer oil wells drilled than in the previous year, with a decrease. in total daily initial production of 61,738 bbl. The total daily potential of the field on Dec. 5, 1939, as determined by the Texas Railroad Commission, was 1,344,677 bbl., an increase of 94,032 bbl. over the previous year. On Dee. 5, 1939, a daily allowable of 130,527 bbl., which was an

Jan 1, 1940

By C. S. Smith, K. K. Ikeuye

In an earlier paper1 one of the authors called attention to the significance of the relative free energies of grain boundaries and interphase boundaries in alloys in determining the shape and distribution of micro-constituents. The ratio of the interphase and inter-crystalline boundary energies (that is, —?12, where ?12 is the energy of the interface between a crystal of phase 1 and a crystal of phase 2, and ?11 is the energy of the boundary between two crystals of phase 1) will be denoted by F. It is this ratio that determines, by the simple triangle of forces relation, the dihedral angle, ?, of phase 2 where it adjoins a boundary between two grains of phase 1. On a metallographic sample various angles are actually obtained because of the random orientation of the plane of observation, but the statistically most frequent angle is the true one. These basic principles were discussed in detail in the earlier paper. The experiments described below show the effect of both composition and temperature on ? and T for some alloys containing a liquid phase, and provide data on the rate of approach to the equilibrium angles in both solid and liquid phases. All the alloys were melted in a graphite crucible and cast into ingots 3/4 by 11/8 in. cross-section. Some of the aluminum alloys consisted of two immiscible liquids from which uniform castings could not be obtained. The amount of liquid phase varied locally to a considerable extent and the analyses were meaningless. Nevertheless, the composition of the liquid would not differ from that in an alloy of the intended gross composition, and the synthetic composition of the alloys was therefore used in considering the surface energy results. The ingots were given initial deformation by cold-rolling to 50 pct reduction, annealed, and given a second 50 pct reduction prior to cutting into small samples for heat treatment at the times and temperatures subsequently reported. The resulting micro-samples were carefully prepared metallographically and examined at magnifications of 650, 1280, or 2500. The objectives used were 21X, 0.40 NA (dry); 41X, 0.65 NA (dry); and 80X, 1.40 NA (oil emulsion). The appropriate angles were measured by rotation of the stage of a Bausch and Lomb metallograph to align the appropriate boundaries successively with a cross-hair in a micrometer eyepiece. About 250 angles were measured on each phase. Though the angles were read to 1°, the accuracy is probably not above 3°, because of uncertainty in setting the cross-hair tangent to the sometimes curved boundary. The corners of very small particles, particularly in early stages of adjustment after cold-rolling, were difficult to measure and the results were slightly dependent on the magnification used (compare Fig 1-C and 1-D). With particles of larger size and more nearly equilibrium shape, magnification made no difference (vide Fig 1-F and 1-G). The measured angles were grouped in 10° intervals (5° if ? was less than 20°) and plotted in bar

Jan 1, 1950

By A. D. Hodges

In 1874 my attention was called to what seemed to me an interesting and new nickel and cobalt combination found in Ludwig and Carter's copper mine, near Mason Valley, Esmeralda County, Nevada. With the assistance of Mr. A. Hebberling I made several partial analyses of the mineral or minerals. I also communicated with my friend, Professor H. B. Cornwall, of the John C. Green School of Science, College of New Jersey, who analyzed a couple of specimens which I forwarded to him. The copper ore occurs in the mine principally as carbonate and to a certain extent as silicate, the latter generally in connection with clay seams or bands. In some places, together with the copper silicate and clay, generally interstratified with them, there occurred a compact shining black mineral (a) containing nickel and cobalt. Occasionally, in cavities, in connection with (a) was found a black substance (b), either massive and in this case very similar to (a) but with driller lustre, or forming an incrustation with rough and botryoidal surface and radial-fibrous structure, or granular and earthy. A few specimens were found having on the surface very fragile black needles (c) sometimes 1/2-inch long, interspersed with needles of malachite. The mineral (a) seemed, according to the analyses, to be of nearly constant composition, and was considered by Professor Cornwall to be a chrysocolla containing nickel and cobalt—a new occurrence to

Jan 1, 1885

By Carl Wagner

J. Pearson (British Iron and Steel Research Association, London, England)—Dr. Wagner has referred to the work of Richardson and Dancy and Gellner and Richardson on the reduction at 900 °C of wiistite films on iron. He has assumed that iron ions and electrons migrate backwards to the iron-wustite interface and that the reduced iron grows on the metal substrate. This would be a possible explanation of the results of these workers were it not for the fact that, as stated by Gellner and Richardson but not stressed, this growth in the center of the specimen can occur even

Jan 1, 1953