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STANDING COMMITTEES Executive-A. R. LEDOUX, chairman. Membership-J. E. JOHNSON, JR.,* chairman. Finance-J. V. N. Dorm, chairman. Library-E. GYBBON SPILSBURY, chairman. Papers and Publications-BRADLEY STOUGHTON, chairman.

Jan 5, 1919

By P. C. Seligmann

The theory of firing of electric detonators is developed insofar as it affects the design of blasting circuits. Practical values for the firing conditions suited to detonators of local manufacture are tabulated. The design principles of blasting circuits are outlined. This information can be used by mine management to ensure that electric blasting will be done efficiently and economically.

Jan 1, 1979

By G. Coetzer, J. C. Davidtz

The substitution of functional groups in covalent trithiocarbonate collector molecules influences the selective and non-selective bonding of collector molecules to mineral surfaces, as well as flotation efficiency in a mixed sulphide ore. These effects were concluded to be related to the metal-sulphide solubility products and electron densities on the sulphur atoms in the collector

Jan 1, 1989

By Carlos Agreda

"In the present article a case study of ammonium nitrate in mine water is briefly analized and discussed. Causes of mine water pollution from AN are very well identified and emphasized.Some preventative measures, as well as, some methods of monitoring and control to minimize, mitigate and/or avoid mine water pollution are recommended."

Jan 1, 1999

Jan 1, 1887

For the year ending February, 1920 PRESIDENT HORACE V. WINCHELL, MINNEAPOLIS, MINN. PAST PRESIDENTS PHILIP N. MOORE ST. Louis, Mo. SIDNEY J. JENNINGS NEW YORK, N. Y. FIRST VICE-PRESIDENT A. R. LEDOUX NEW YORK, N. Y. TREASURER GEORGE D. BARRON NEW YORK, N. Y. SECRETARY BRADLEY STOUGHTON, NEW, YORK, N. Y.

Jan 8, 1919

By Arash Khosravifar

The seismic design of extended pile shafts for the combined effects of dynamic shaking and liquefaction-induced lateral spreading is investigated using nonlinear dynamic finite element analyses (NDA). Results of NDA parameter studies are used to illustrate how inertia and lateral spreading loads combine during shaking. The NDA results are used to evaluate equivalent static analysis (ESA) methods. Implications for design practice are discussed.

Jan 1, 2010

By Robert Job

Up to five years ago the pig-iron used by the Philadelphia & Reading Railway Co. had been obtained solely upon the appearance of the fracture; but as the service was unsatisfactory, an investigation was made to determine the quality best adapted

Jan 1, 1905

By M. H. Kirchner

Trackless mining at Thabazimbi Mine by M. H. KIRCHNER*. Pr. Eng.. B.Sc.. B.Sc. (Elec. Eng.}(Stellenbosch). Dip. Mining (Pta.) Certain aspects ?f the' methods used in the exploitation, by sub-level caving, of a wide, tabular, steeply dipping orebody are described, reference being made to the use of modern mechanized equipment. Statistics relating to production and labour, as well as some geological details, are given.

By A. K. Haines

Hydrometalurgy, particularly leaching, is a highly topical subject and always generates great interest in the mineral industry. This was evident right from the start of the organization of the SAIMM Colloquium on Leaching, which was held at Mintek on the 8th and 9th November, 1988. The response to the cal for papers was so good that the Colloquium was extended to two days, instead of the usual one day.

Jan 1, 1988

Plans are now being made for the formation of the American Meteorological Society, which has for its object the advancement and diffusion of the knowledge of meteorology and climatology said the broadening of their applications in public health, agriculture engineering, industry and commerce. Information regarding the society may be obtained from Charles F. Brooks, Weather Bureau, Washington, D. C.

Jan 12, 1919

The Role of Partnerships ?Industry history ?Companies were their own kingdoms ?MSHA and NIOSH were out of touch and focused on enforcement with no direction ?Labor and management were constantly at odds with each other

Jan 1, 2002

The American Steel Treaters Society, which meets at the Seventh Regiment Armory, Chicago, Ill., on Sept. 23-27, has provided an especially interesting program of thirty-five papers. They deal with "Heat Treatment of Steels for Cutting Purposes," "Heat Treatment of Miscellaneous Products," Heat Treatment of Steel for Intermittent Cutting Purposes, "Results of Investigation Pertaining to Heat Treatment," "Heat Treating Equipment," "Solution of Modern `demands on Heat Treating."

Jan 9, 1919

Selected bibliographies of the Iron Resources of the World and the Coal Resources of the World have' been prepared by the Engineering Societies Library for the National Research Council from the most prominent. American, English and foreign books and periodicals. The bibliograpies are intended as a guide to the literature giving economic

Jan 5, 1919

The Committee on Nominations begs to submit the following names as its nominees for the respective offices indicated: For President, SIDNEY J. JENNINGS, New York. For Vice-Presidents, WALTER H. ALDRIDGE, New York; MARK L. REQUA, San Francisco. For Directors, J. E. JOHNSON, JR., New York; ALLEN H. ROGERS, Boston; HOWARD N. EAVENSON, West Virginia; ROBERT M. RAYMOND New York; WILLET G. MILLER, Canada.

Jan 12, 1916

A joint meeting of the American Institute of Metals Division, and the iron and steel members of the American Institute of Mining Engineers; with the American Foundrymen 's Association, has been arranged for Milwaukee, beginning on Tuesday, October 8, 1918. The papers to

Jan 8, 1918

[PRESIDENT GEORGE OTIS SMITH, District 4 WASHINGTON, D. C. PAST PRESIDENTS SAMUEL A. TAYLOR, District 3 PITTSBURGH, PA. E. DEGOLYER, District 0 NEW YORK, N. Y. FIRST VICE-PRESIDENT W. H. BASSETT, District 1 WATERBURY, CONN.]

Jan 1, 1928

The Institute is desirous of securing the photographs of Adolph Patera and Albert Serlo, two deceased honorary members of the Institute. All resources within the ken of the Secretary have been tried out to secure these photographs without avail. If any, of our members can give us suggestions which will lead to the accomplishment of the desired ends, such suggestions will be much appreciated.

Jan 5, 1919

By Robert H. Palmer

Sacuranao Field.—Bacuranao field is about 12 miles east of Havana, along the contact between Cretaceous sediments and a serpentine intrusion. The zone lies within an extensive anticlinorium. The field had no developments during the year 1939. The production of 9½ bbl. per day is distilled and the gasoline and kerosene are extracted. The asphalt residue. is sold for road construction. The gas is compressed and

Jan 1, 1940

IT is not enough to know how to melt well and to have the bellows and charcoal for your purpose. If you wish to make small castings turn out well, on account of their thinness, it is necessary to aid the metals with unctuous and corrupting materials like tin, sublimate, arsenic, or realgar,

Jan 1, 1942