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RI 2855 Chambering Cut-Holes Of Drift Rounds In A Western Metal MineBy E. D. Gardner
"The Bureau of Mines has studied blasting practices in metal mines of the Southwest. The investigation of blasting drift rounds showed among other results, that cut-holes in ground difficult to break
Feb 1, 1928
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RI 2858 Tests of Atmospheres in Chesapeake & Ohio Railroad Tunnels between Clifton Forge VA & Hinton WVBy L. B. Berger, W. P. Yant, R. R. Sayers
"At the request of the Chesapeake & Ohio Railroad Co. a number of tests were made to determine the temperature, humidity, and composition of the atmosphere in certain tunnels of that railroad between
Feb 1, 1928
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Condenser Materials and Blue Powder in Zinc SmeltingBy Russell Millar
ACCORDING to the data of Maier and Ralston1 zinc vapor and carbon monoxide under the conditions in which they are present in a zinc condenser should, from a thermodynamic point of view, react to form
Jan 9, 1928
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Calculations in the Interpretation of Observations with the Eötvös Torsion BalanceBy Donald Barton
THIS paper outlines a time-saving graphical method of calculation for application to the interpretation of observations with the Eötvös torsion balance. Preliminary to the treatment of this short cut
Jan 9, 1928
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Discovery of Salt Domes in Alsace by Electrical ExplorationBy V 7. 0 / 300 dpi
DRILLING in the Oligocene potash basin of Alsace prior to 1927 had shown important differences of level in the salt beds thus encountered. To explain this a somewhat unsatisfactory hypothesis of fault
Jan 9, 1928
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International First-Aid WinnersTHE International First-Aid and Mine-Rescue con-test, under the auspices of the U. S. Bureau of Mines, was held at Butte, Mont., on Aug. 20, 21 and 22. As usual, the first-aid elimination contests wer
Jan 9, 1928
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Geophysical Methods at Boston MeetingDETAILED programs for the Regional Meeting to be held at Boston, on Aug. 29, 30, 31, will be available on arrival at the Copley-Plaza Hotel, where registration will begin at 10 a. m. on Wednesday morn
Jan 9, 1928
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National Safety Council MeetingTHE National Safety Council will hold the following ses-sions in the Waldorf-Astoria Hotel, New York, N. Y., on Oct. 2, 3 and 4: Oct. 2. 9.30 A. M. 1. Report of past year committees, by Chairman 2.
Jan 9, 1928
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The Seismic Method of Mapping Geologic StructureBy Donald Barton
THE elastic, earthwaves produced naturally by earthquakes -have been used for a long time as evidence from which to draw conclusions in re-gard to the constitution of the interior and crust of the e
Jan 9, 1928
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A Background for the Application of Geomagnetics to ExplorationBy Noel Stearn
WHEN the Age of Machinery was suddenly thrust upon civilization about the beginning of the nineteenth century, an unprecedented demand for mineral resources sprang up. This demand brought about the ra
Jan 9, 1928
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Adaptation of Elastic-Wave Exploration to Unconsolidated StructuresBy Frank Rieber
THE study of earthquakes long ago developed the fact that by studying the travel times of the various groups of waves from the same earthquake, as received on seismographs at varying distances, major
Jan 9, 1928
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Mechanization of Coal MinesBy L. E. Young
LOADING machines may be classified in several ways: (1) Machines which cut or break down and load .the coal; (2) machines which simply load the coal; (3) devices which load and transport the coal; (4)
Jan 8, 1928
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Labor versus Power in Transportation1. A passenger rickshaw in China. 2. A Pekin cart carrying coal, on dirt roads; the cost works out to 15 or 20 c. per ton-mile. 3. Coolie with wheelbarrow. This one has a small load, but barrow men c
Jan 8, 1928
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Economics of a Four-cycle Miller CompressorBy Don Coulter
OBSERVATIONS were made over a period of seventeen months to ascertain the economic value of a four-cycle Miller engine direct-connected to a Watts compressor, to determine whether this type of engine
Jan 8, 1928
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Relation of Anti-Trust Legislation to Conservation of Mineral ResourcesBy Cornelius Kelley
VOLUMES have been written about the organizing genius of American industrialists. American methods of production are being studied by the manufacturers of other nations to ascertain the prac-ticabilit
Jan 8, 1928
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Shaft Sinking in the Tri-State DistrictBy S. S. Clarke
THEN sufficient ore has been blocked out on a lease to warrant a shaft, the proposed. Location of the shaft should be carefully considered, as the old promoter's method of sinking wherever his
Jan 8, 1928
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British and American Coal Mining ComparedBy W. J. Shearer
A COMPARISON of statistics relating to coal min-ing in Great Britain and the United States leads one to suspect widely differing conditions and practice. A brief review of some of the conditions may e
Jan 8, 1928
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Brakes for the Mineral IndustryBy George Smith
IN discussing present-day business and industrial troubles we easily drop into the habit of clinical diagnosis. Talk of this kind, with its emphasis on suspicious symptoms and abnormal tendencies, mak
Jan 8, 1928
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Wabana Iron Mines and Deposits, NewfoundlandBy Albert Hayes
FOUR mines at Wabana, on Bell Island in Concep-tion Bay, Newfoundland, produced 1,209,777 tons of ore in 1927, and it is expected that the produc-tion will be larger in 1928. The ore is a stratified o
Jan 8, 1928
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Japan Excursion, 1929PLANS for the World's Engineering Congress in Japan are rapidly taking shape. The Congress itself will be held in Tokyo in the week beginning Oct. 30, and will be followed by a second week of sho
Jan 8, 1928