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Petroliferous Rocks In Serra Da Baliza
By Euzebio De Oliveira
ONE of a recent batch of samples from the Serra da Baliza, in the state of Parana, Brazil, contained asphalt and a dark heavy oil; and workmen on the railway from Porto União to Uruguay discovered asp
Jan 4, 1921
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Miscellaneous Metals and Alloys - An Electron Diffraction Study of Oxide Films Formed on Nickel-chromium .Alloys (Metals Tech., June, 1948, TP 2372)
By E. A. Gulbransen, J. W. Hickman
DURING the past two decades considerable progress has been made in the art of manufacturing heater alloys. The conventional iron-chromium-nickel alloys have been improved by the addition of small quan
Jan 1, 1949
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Producing – Equipment, Methods and Materials - The Skin Effect in Producing Wells
By E. B. Brauer, W. Hurst, J. D. Clark
Because of drilling, completion, and workover practices, the permeability around a wellbore generally is different from the permeability of the formation. The zone with the altered permeability is cal
Jan 1, 1970
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The Discovery And Opening Of A New Phosphate Field In The United States.
By Charles Jones
IN the winter of 1902, while occupying the position of mining and examining engineer for the Mountain Copper Co., Ltd., of Keswick, Cal., I had occasion to discuss with the General Manager, among othe
Jan 10, 1913
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Pittsburg International Session October, 1890 Paper - On the Darby Process of Recarburization
By A. Thielen
In experiments for the production of steel the principal problem has always been the introduction into, or removal from, the iron of a definite quantity of carbon. Although the solution of this proble
Jan 1, 1891
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Papers - The "Plasticity" of Iron at low Temperatures (With Discussion)
By K. Heindlhofer
Estimates of the "plasticity" of a metal are commonly deduced from three types of test—tensile, torsion and impact. The several results have been more or less at variance, though this disparity has at
Jan 1, 1935
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Papers - The "Plasticity" of Iron at low Temperatures (With Discussion)
By K. Heindlhofer
Estimates of the "plasticity" of a metal are commonly deduced from three types of test—tensile, torsion and impact. The several results have been more or less at variance, though this disparity has at
Jan 1, 1935
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Industrial Minerals - Effect of Ultrasonic Energy of Chrysotile Asbestos
By E. Martinez
The effect of ultrasonic energy transmitted through a liquid on chrysotile asbestos was investigated. Ultrasonic energy was effective in fiberization of chrysotile crudes as well as standard grades of
Jan 1, 1963
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New York Paper - Environmental Conditions of Deposition of Coal (with Discussion)
By David White
Jan 1, 1925
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Mining and Milling at Broken Hill, Australia
By M. W. BERNEWITZ
IT is 27 years since I last visited Broken Hill, New South Wales, one of the world's greatest lead-silver-zinc districts. Then, the flota¬tion of ores was in its infancy. The Minerals Separation
Jan 1, 1935
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Industrial Minerals - Application of Electrostatics to Concentration of Coarse Pebble Phosphate
By E. Northcott, F. N. Oberg
By electrostatic separation, course Florida pebble phosphate, too lou-grade to find a ready market, can be upgraded to a satisfactory saleable product. Pebble running from 60 pct bone phosphate of tim
Jan 1, 1959
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Plastic Deformation of Coarse-grained Zinc (d1081cc7-5b74-420b-893d-2c7794755593)
By C. H. Mathewson
CONSIDERABLE progress has been made during the last few years in analyzing the action of plastic deformation in metallic crystals. This is due largely to the development of X-ray spectrographic method
Jan 1, 1927
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A Method for Distinguishing Sulphides from Oxides in the Metallography of Steel
By George Comstock
IT seems a common opinion among metallographists that all light-gray inclusions seen with the microscope in polished sections of steel are manganese sulphide. Examples of this belief are continually a
Jan 12, 1916
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Iron and Steel Division - Kinetics of the Iron Oxide Reduction Steps (TN)
By G. R. St. Pierre, A. J. Wilhelem
In connection with the reduction of hematite or magnetite to metallic iron, it appeared desirable to study the rate of reduction of each oxide to the next lower oxide under conditions which excluded a
Jan 1, 1962
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Tennessee Phosphate Practice (985abe45-e5e0-4bf7-8091-d5c7682b9006)
By James Barr
Geology and Mineralogy1 TENNESSEE phosphates are commercially divided into three varieties: Brown, blue and white. The first two only are now of commercial importance. The white phosphates of Perry c
Jan 9, 1914
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Use of an Automatic Resistivity System For Detecting Abandoned Mine Workings
By R. G. Burdick, W. R. Peters
Shallow underground voids resulting from early coal mining and other resource recovery activities over the past several decades are now being recognized as a significant cause of ground subsidence pro
Jan 1, 1984
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Producing-Equipment, Methods and Materials - Oil Production From Reservoirs With an Oil Layer Between Gas and Bottom Water in the Same Sand
By J. van Lookeren
In the case of a reservoir where the oil underlies a large gas cap and overlies bottom water, production can be inzproved considerably if wells are perforated below the water-oil contact rather than o
Jan 1, 1966
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Preliminary Production Report From the Bureau of Mines
A record $18.7 billion worth of metals, non- metals and fuels was produced in the U.S. during 1962, according to a year-end estimate from the USBM. The 1962 total value, based on preliminary statistic
Jan 2, 1963