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By J. Taffanel

I am very much impressed by this manifestation of international brotherhood; the mining engineers on both sides of the ocean have similar subjects to deal with, meet with the same difficulties, expose themselves sometimes to similar dangers…

Jan 1, 1915

Jan 1, 1929

By George J. Thompson

The need for studying brittle fracture is defined; the main elements of this type of failure are explained; and the mechanism at crack initiation is outlined. Various design and maintenance practices which can preclude costly downtime caused by unexplained machine failures are proposed.

Jan 1, 1974

By George Watkin Evans

During the past ten or twelve years, the average reader of newspaper and magazine articles has been led to believe that enormous deposits of high-grade coal exist in the northland and that these can be mined for practically nothing. But much of the reputed glitter and attractiveness of Alaskan coals disappears when viewed at close range. Many areas of coal-bearing rocks are widely distributed geographically from Cape Lisburne, on Bering Sea, to Admiralty Island, south of Juneau. Bituminous coal is found at Cape Lisburne, on the Bering Sea, at Five Finger Rapids on the upper Yukon, and at Herendeen Bay and Chignik Bay; lignite is found on the Kobuck River, along the Yukon River from points near the mouth to Tonakat, near Rampart, at Dawson, on the east shore of Cook Inlet, and in the Tanana Valley, 50 mi. south of Nenana. The Susitna and Matanuska Valleys contain coal ranging from lignite to anthracite, and in the Bering Lake district, there are coals ranging from semi-bituminous to anthracite. No effort will be made to describe all of these fields, but the writer will confine himself to the four principal fields, namely, the Nenana field! in the interior of Alaska, tributary to the Fairbanks district; the Matanuska field, in the Matanuska Valley; the Kachemak Bay field on the east shore of Cook Inlet; and the Bering River field, east of the mouth of Copper River. Nenana Coal Field The Nenana field occupies an area east of the Nenana River 70 mi. (112 km.) southwest of Fairbanks and approximately 50 mi, from the town of Nenana, which is located at the junction of the Alaskan Railway and the Tanana River. It is on the northern flank of the Alaskan Range and occurs within the foothills of that district. The elevations range from 1000 to 4000 ft. (304 to 1219 m.). Future developments may prove the field to extend from a considerable distance west of the Nenana River to the headwaters of the Tanana River. The coal measures are of Tertiary age and are probably Eocene. They are not badly deformed by folding, but portions of the field show

Jan 1, 1922

By W. H. Lang, C. H. Cox, H. Snell

The treatment of unaltered western phosphate ores by both wet and dry methods is discussed. The objective of the beneficiation is to produce salable Phosphate rock ( 31% P205), with an economic recovery of P205.

Jan 1, 1981

By Waldemar Lindgren

The important investigations of Dr. G. F. Becker at Steamboat Springs, Nev., in 1885, aided by the analytical work of W. H. Melville, established the fact that sulphides were being deposited at the surface by hot ascending waters.' Steamboat Springs is situated near the eastern base of the escarpment of the Sierra Nevada, six miles distant from the Comstock lode.

Jan 1, 1906

By R. C. Emmett, D. A. Dahlstrom

Application of continuous filtration to precipitate dewatering requires not only careful equipment selection, choice of appropriate media, but also close control of precipitation technique itself.

Jan 1, 1961

Extractive Metallurgy Division Institute of Metals Division Iron and Steel Division OFFICERS AND COMMITTEES W R Hibbard, Jr , President J C Kinnear, Jr , Past President John Chipman, Vice-President T D Jones, Treasurer R W Shearman, Secretary AIME, 29 West 39th Street New York 18, N Y

Jan 1, 1958

Jan 1, 1915

Jan 1, 1920

G. K. BURGESS, ? Washington, D. C.-At the Bureau of Standards it was decided, in order to study the high-aluminum end of these curves, that efforts should be made to prepare pure aluminum, and the promise of getting aluminum, practically free from the two elements that have such great effect in very small quantities, namely, silicon and iron, and which

Jan 12, 1919

An ore search for commercial titanium-bearing ore deposits is in progress by the Crane Co., manufacturers of valves, because they expect this metal to be important in valve manufacturing in the future. The company will eventually be mining and making titanium sponge. At present they are buying titanium tetrachloride from the Stauffer Chemical Co, at Niagara Falls and making titanium by reaction with magnesium. Production from the Babbitt concentrator of Reserve Mining Co. is scheduled to begin in late 1951 or early 1952. The capacity is to be 300,000 tons of pellets per year made from magnetic taconite concentrates.

Jan 7, 1951

By P. A. Freeman, T. W. Healy, D. R. Dixon, L. O. Kolarik, D. N. Furlong

The effect of water, acid and alkali washing on the surface properties of natural magnetite were investigated by microelectro-phoresis. The general control on the isoelectric point ([i]ep) of the natural magnetite that is effected by colloidal and adsorbed silicate species can be reversed by various acid/alkali washing procedures. Added aqueous silicate and aluminium ions lower and raise the [i]ep to values consistent with hydrous silica and alumina coatings respectively.

Jan 1, 1980

Australian research scientists at the University of Melbourne's Institute of Materials Research have discovered two methods of extracting metals from raw ore, using brown coal. The discoveries could lead to extensive new markets for the brown coal producers of Australia (boasting the world's largest brown coal deposits in the Latrobe Valley region of Victoria), the United States and West Germany. Research on the extraction processes began at the University's Department of Metallurgy in mid-1969 under the direction of Geoffrey Cullen, manager of the Materials Research Institute. In June of this year. Cullen announced that both metal extraction processes, using brown coal, had proven successful.

Jan 1, 1971

CURRENT MATTERS Page Page New York Meeting v Federal Control of Minerals xxxii Meeting of Board of Directors.. ix Naval Consulting Board...' xxxix Reports for Year, 1917: Perkin Medal xl Secretary ix Communication from Albert Treasurer xvii Sauveur xl Committee on Membership... xx Affiliated Student Societies xli Committee on Increase of Membership in Military Service... xli Membership xx Personal xlvii Committee on Publications... xxii Positions Vacant 1 Committee on Library xxiii Engineers Available li Local Section News: Forthcoming Meetings lii Boston xxiv Library liii. Columbia xxv Membership lvii San Francisco xxx Institute Committees lxx Qualifications for Membership.. xxxi Officers and Directors lxxviii.

Jan 2, 1918

By C. W. Washburne

Professor Lane makes an interesting contribution to the study of cholride waters, in saying that calcium chloride waters occur not only in the greenstones of Lake Superior copper mines, but also in the interbedded felsitic conglomerated and…

Jan 1, 1915

By C. E. Shoenfelt

The outstanding development in Colorado in 1938 was the completion of the discovery well of the Wilson Crcek structure in Rio Blarlco County, on the western slope in the northwest corner of Colorado. Last year the Transactions (volume 127) carried an account of the discovery of oil in the Morrison sand in the Wilson Creek structure, in the joint test by The Texas Company and The California Company. This important

Jan 1, 1939

Jan 1, 1923

Jan 1, 1949

The Committee on Nominations will welcome from members of the Institute suggestions for the offices which are to be filled by election in February, 1018, and which are as follows: One officer, known as Director and President. Two officers, known as Director and Vice-President. Five officers, known as Director. The attention of members is called to Articles V and. VII of the Constitution, and to By-Law VIII, which reads as follows: "The geographical districts to he considered by the Committee on Nominations shall be as follows, until otherwise ordered by the Board.

Jan 8, 1917