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Papers - Ground Movement and Subsidence - Ground Movement from Mining in Brier Hill Mine. Norway. Michigan (With Discussion)
By George S. Rice
A problem of possible subsidence of the surface from mining operations, which might have had disastrous results, arose in 1913 at the Brier Hill mine, of the Penn Iron Mining Co., near Norway, Mich.,
Jan 1, 1934
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Influence of Silver on the Softening of Cold-worked Copper
By H. C. Kenny
THE annealing or softening temperature of cold-worked copper is appreciably increased by almost unbelievably small amounts of silver. As indicated by some data in this paper, the softening temperature
Jan 1, 1934
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Papers - Critical Studies of a Modified Ledebur Method for Determination of Oxygen in Steel, II (With Discussion)
By B. M. Larsen, W. E. Shenk, T. E. Brower
Shortly after our previous paper on this subject was printed1 we located a source of uncertainty in the results arising from the unexpected fact that hydrogen slowly reduces silica at 1100" C. in pres
Jan 1, 1934
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Ash-To-Mineral-Matter Correction In Coal Analyses* A Study Based Upon Coal-Ash Analyses
By Gilbert Thiessen
THE purposes of this paper are (1) to show that the mineral matter content of coal is satisfactorily represented by the Parr formula; that is, Mineral matter = 1.08 Ash + 0.55 Total sulfur (2) to co
Jan 1, 1934
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Papers - Electrical Methods - Location of Faults in Hardin County, Illinois, by the Earth-resistivity Method (With Discussion)
By J. Marvin Weller, M. King Hubbert
Preliminary investigations were undertaken with a Megger Ground Tester in 1931 by Hubbert to determine whether the faults in Hardin County, Illinois, could be located by earth-resistivity surveys. The
Jan 1, 1934
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Papers - Smelting - Waste-Heat Boiler Practice - Copper-refinery Waste-heat Boilers at Great Falls Reduction Department,
By E. S. Bardwell
Each of the three refining furnaces in use at Great Falls is provided with a waste-heat boiler. The general arrangement of furnace and boiler is as shown in Fig. 1. Two of the furnaces have hearths 45
Jan 1, 1934
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Papers - Non-Metalic Minerals - Economic Notes on the Nonmetallic Mineral Industries (With Discussion)
By Paul M. Tyler, Oliver Bowles
The extensive employment of nonmetallic minerals antedates the use of metals, but only within the last two decades has the production of nonmetals begun actually to keep pace with the complicated acti
Jan 1, 1934
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Papers - Ground Movement and Subsidence - Further Notes on Bumps in No. 2 Mine, Springhill, Nova Scotia (Abstract)
By T. L. McCall
This is a continuation of the paper on bumps presented by the late Mr. Herd in February, 1929. The seam worked consists of bituminous coal, 9 ft. thick, pitching 20°, and now under a depth of cover of
Jan 1, 1934
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Papers - Mining Methods - The Owyhee Tunnels (Abstract)
By P. R. Hanes
A description of the methods used in driving two tunnels, 2 miles long each, one a 9-ft. and the other a 19-ft. diameter section, for the Owyhee Irrigation Project, Oregon. One heading of the smaller
Jan 1, 1934
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Papers - Seismic Methods - Certain Field Problems in Reflection Seismology (With Discussion)
By W. E. Pugh
The object of the following is to discuss a few of the problems encountered in the practical field application of reflection seismology. Very little has been published on this phase of the work and it
Jan 1, 1934
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Papers - Mineral Industry Education - Applied Psychology in the Payment of Bonuses, Whether for Increased Service or Mine Safety (Abstract)
By Eugene McAuliffe
The management of The Union Pacific Coal Co., which operates a group of coal mines in Southern Wyoming, believes in the value of applied psychology as a productive factor in the work of getting out co
Jan 1, 1934
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Papers - Structure and Origin of the Copper-cuprous Oxide Eutcctic (With Discussion)
By L. W. Eastwood
The structure of eutectics has been studied by a number of investigators, and the complexity of the structural relationship of the components has been agreed upon, especially that of the "eutectic col
Jan 1, 1934
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Papers - Magnetic Methods - Theory and Experiments Concerning a New Compensated Magnetometer
By C. A. Heiland W. E. Pugh
The principle underlying the majority of magnetic intensity variometers is a comparison of the force to be measured with another force of known magnitude. The known force may be (a) of a magnetic natu
Jan 1, 1934
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Application of Principles of Similitude to-Design of Mine Workings
By P. B. Bucky
THE purpose of this paper is to present a scientific method for deter-mining the proper span and shape of roof for safe and economical mining; at present, these two vital factors wherever pillars are
Jan 1, 1934
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Papers - - Production - Domestic - Oil and Gas Development in New York State
By D. H. Newland
On the bulk basis New York's contribution to the production of oil is small, representing, as it does, a bare half of one per cent of the annual total for the United States. Yet it has more impor
Jan 1, 1934
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Papers - The High-zinc Region of the Copper-zinc Phase Equilibrium Diagram
By E. A. Anderson, M. L. Fuller
The copper-zinc phase equilibrium diagram has been the subject of many investigations. Until recently, however, the boundary of the terminal solid solution of copper in zinc (eta) has not been thoroug
Jan 1, 1934
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Strength and Aging Characteristics of the Nickel Bronzes
By E. M. Wise
THE practice of adding moderate quantities of nickel to a variety of bronzes has been employed by foundrymen for many years with several objects in view. In some instances it was desired- to harden th
Jan 1, 1934
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Papers - - Production Engineering and Engineering Research - Basic Data for Oil and Gas Wells
By Eugene A. Stephenson, Leon J. Pepperberg
The natural gas industry is essentially a byproduct of the oil industry. When first discovered the gas was usually regarded as a nuisance, and even when found immediately associated with oil, or suspe
Jan 1, 1934
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Papers - - Production - Domestic - Oil and Gas Development in Illinois in 1933
By A. H. Bell
Continued low prices and restricted markets for crude oil discouraged drilling activity in Illinois oil fields during 1933. Only 36 wells were completed in the state, the smallest number since 1904, a
Jan 1, 1934
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Papers - - Production - Foreign - The Petroleum Industry of the Union of Soviet Socialist Republics
The following paper, submitted by the Russian petroleum authorities, was secured through the courtesy of G. V. Ackerman, Vice President of Amtorg Trading Corporation, and N. V. Vannikoff, Representati
Jan 1, 1934