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Jan 1, 1969

Jan 1, 1935

Jan 1, 1935

Jan 1, 1935

Jan 1, 1935

Jan 1, 1935

Executive J V W. REYNDERS, Chairman WILLIAM H. BASSETT E DEGOLYER H C BELLINGER RICHARD PETERS. JR. Finance H. A. GUESS GEORGE OTIS SMITH, Chairman F. JULIUS FONS Admissions GEORGE D. BARRON, Chairman DAVID LEVINGER P. A MOSMAN El K MASTERS J. A. SINGMASTIIR Alternates F. G. BREYER C W HAMILTON F. E PIERCE

Jan 1, 1923

By P. Payson

EMBRITTLEMENT of hard-tempered martensite (500°F embrittlement) appears to be coincident with the beginning of the third stage of tempering. During the first stage, primary martensite of steels containing over 0.25 pct C decomposes to a mixture of c carbide and martensite of appreciably constant carbon content close to 0.25 pct.' During the third stage of tempering, cementite forms. In steels with

Jan 1, 1955

Jan 1, 1946

Jan 1, 1946

By Frank Firmstone

IN Chemical Phenomena of Iron Smelting, Mr. Bell gives the weight of materials required to fill furnaces of various sizes at the Clarence Works ; as this differs very much from the weight required for furnaces at Glendon, where anthracite and magnetic and brown iron-ores are used, a comparison is interesting. Taking furnaces at Glendon of 4800 and 11,900 cubic feet capacity and comparing them with the Clarence furnaces of 6000 cubic feet and 11,500 cubic feet, we find that the 4800 cubic feet at Glendon and the 6000 cubic feet at Clarence required respectively-

Jan 1, 1873

By Frank Firmstone

IN Chemical Phenomena of Iron Iron Smelting, Mr. Bell gives the weight of materials required to fill furnaces of various sizes at the Clarence Works ; as this differs very much from the weight required for furnaces at Glendon, where anthracite and in agnetic and brown iron-ores are used, a comparison is interesting. Taking furnaces at Glendon of 4800 and 11,900 cubic feet capacity and comparing them with the Clarence furnaces of 6000 cubic feet and 11,500 cubic feet, we find that the 4800 cubic feet at Glendon and the 6000 cubic feet at Clarence required respectively

By John F. Blandy

THE map on Plate I illustrates a part of the works of the Red Bank Mining Company, on the Upper Freeport seam of coal, in Armstrong County, Pennsylvania. The contour lines give a careful representation of the conformation of the surface, showing also the line of outcrop of the seam, and the gangways of the mines are shown by the black lines. Upon assuming charge of the works in January last, I found that the first and greatest difficulty lay in the great uncertainty of the

Jan 1, 1876

By Martin F. Milligan

THIS short discussion of the effects of deoxidation on the mechanical properties of cast steels is intended to serve as general introduction to the subject of this afternoon's session. The subject is covered in detail in Mr. Carter's excellent paper. My material has been collected from the works of various investigators, several of whom are present today. For a definition of deoxidation, as applied to steel-furnace melting practice, we can best go to Briggs' book, "The Metallurgy of Steel Castings." Briggs says that deoxidation "includes all the phenomena in the final preparation of steel that would permit it to solidify free from gas cavities and from dissolved oxygen of all kinds." Various practices are used by welters to produce these end results.

Jan 1, 1947

By J. A. Dresser

The controlling supply of asbestos for the world is obtained from southern Quebec, 150 miles or less north of the international boundary line between Canada and the United States, and about 75 miles south of the city of Quebec.

Jan 1, 1915

The Engineering Societies Building is owned by the United Engineering Society which is composed of the American Institute of Mining and Metallurgical Engineers, the American Society of Civil Engineers, the American Society of Mechanical Engineers, and the American Institute of Electrical Engineers, the four national engineering societies known as the Founder Societies. Its erection, and that of the Engineers Club which adjoins, was made possible through the generosity of Mr. Andrew Carnegie, Honorary Member, who in 1903 contributed $1,500,000 for the purpose. The Founder Societies purchased the land on which the Engineering Societies Building stands and the Engineers Club the land for its building.

Jan 1, 1923

George Ellery Hale, Director of the Mount Wilson Observatory and Foreign Secretary of the National Academy of Sciences, who has been for the last ten years a Correspondent of the Academie des Sciences, Institut de France, has received the unusual honor of election as Associe Etranger, taking the place of Adolph von Baeyer, declared vacant by the Academy. The Foreign Associates are limited to twelve, and the high distinction has been held by only two Americans-Simon Newcomb and Alexander Agassiz. The National Research Council upon the presentation and acceptance of. Dr. Hale's resignation as its Chairman and the election of James R. Angell as his successor, created and bestowed in perpetuity upon Dr. Hale the title of Honorary Chairman in recognition of his services to the National Research Council and to Science and Research by indefatigable efforts that have contributed so largely to the organization of science for the assistance of the Government during the war, and the augmentation of the resources of the United States through the newly intensive cultivation of research in the reconstruction and peace periods that follow.

Jan 8, 1919

By Donald Markle

Anthracoal is a mixture of small particles of anthracite coal and a matrix of practically pure carbon, formed from the distillation of coal-tar pitch or other suitable bitumen. It is a hard, dense, homogeneous mass, with a silvery luster and in color varies from silvery to grayish black. When pushed from the oven, it develops only partly the fingerlike structure of coke; but, unlike coke, it has a tendency to remain in blocky masses. When struck with a hammer or passed through crushing rolls, it breaks with an irregular fracture, similar to anthracite, but with very little fines. Due to its density, anthracoal is harder, tougher, and stronger than coke. The results of a test made by the blast-furnace department, of the Bethlehem Steel Co., on two barrels of anthracoal are given in Table 1.

Jan 1, 1922

By Freeman Bishop

Of all President Nixon's many legislative proposals, the one that will probably have the most far reaching effect on the mining industry will be the collecting of odds and ends of antipollution programs into the confines of a single independent Federal agency, the Environmental Protection Administration. In addition, the President is asking this Congress to approve shifting some policy and planning to the Commerce Department in an agency that will probably be known as the Oceanographic and Atmospheric Administration. This division will deal with ocean mining policy and future sources of minerals and metals.

Jan 1, 1970