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  • NIOSH
    RI 2855 Chambering Cut-Holes Of Drift Rounds In A Western Metal Mine

    By 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

  • NIOSH
    RI 2858 Tests of Atmospheres in Chesapeake & Ohio Railroad Tunnels between Clifton Forge VA & Hinton WV

    By 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

  • AIME
    Condenser Materials and Blue Powder in Zinc Smelting

    By 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

  • AIME
    Calculations in the Interpretation of Observations with the Eötvös Torsion Balance

    By 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

  • AIME
    Discovery of Salt Domes in Alsace by Electrical Exploration

    By 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

  • AIME
    International First-Aid Winners

    THE 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

  • AIME
    Geophysical Methods at Boston Meeting

    DETAILED 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

  • AIME
    National Safety Council Meeting

    THE 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

  • AIME
    The Seismic Method of Mapping Geologic Structure

    By 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

  • AIME
    A Background for the Application of Geomagnetics to Exploration

    By 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

  • AIME
    Adaptation of Elastic-Wave Exploration to Unconsolidated Structures

    By 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

  • AIME
    Mechanization of Coal Mines

    By 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

  • AIME
    Labor versus Power in Transportation

    1. 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

  • AIME
    Economics of a Four-cycle Miller Compressor

    By 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

  • AIME
    Relation of Anti-Trust Legislation to Conservation of Mineral Resources

    By 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

  • AIME
    Shaft Sinking in the Tri-State District

    By 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

  • AIME
    British and American Coal Mining Compared

    By 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

  • AIME
    Brakes for the Mineral Industry

    By 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

  • AIME
    Wabana Iron Mines and Deposits, Newfoundland

    By 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

  • AIME
    Japan Excursion, 1929

    PLANS 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