About the Book
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 Excerpt: ...the succeeding 34 months 30 explosives were added to the list; 7 explosives were dropped (in most instances because the manufacturers no longer desired to market them) and are no longer designated permissible explosives. The present list takes the place of all preceding lists and includes a total of 175 explosives. Additions to this list of permissible explosives will be published in future issues of the Monthly Statement of Coal-Mine Fatalities in the United States, which contains also lists of miners' electric lamps and other devices approved by the Bureau of Mines. a Hall, Clarence, Permissible explosives tested prior to Jan. 1,1912, and precautions to bo taken in their use: Miner's Circular 6, Bureau of Mines, 1912, 20 pp.; Fees for testing explosives: Schedule 1, Bureau of Mine?, 1913; Hall, Clarence, Snelling, W. O., and Howell, S. P., Investigations of explosives used in coal mines: Bull. 15, Bureau of Mines, 1911,191 pp.; Hall, Clarence, and Howell, S. P., Tests of permissible explosives: Bull. 66, Bureau of Mines, 1913,313 pp.; Munroe, C E., and nail, Clarence, A primer on explosives for coal miners: Bull. 17, Bureau of Mines, 1911, 01 pp.; Rutledge, J. J., and Hull, Clarence, The use of permissible explosives: Bull. 10, Bureau of Mines, 1912,34 pp.; Storm, C G., The analysis of permissible explosives: Bull. 90, Bureau of Mines, 1910, 88 pp.; Rutledge, J. J., The use and misuse of explosives in coal mining: Minor's Circular 7, Bureau of Mines, 1913,52 pp.; Howell, S. P., and Tillany, J. K., Methods tor routine work in the explosives physical laboratory of the Bureau of Mines: Tech. Taper ISO, Bureau of Mines, 1918,03 pp. 6 Howell, S. P., Permissible explosives tested prior to Jan. 1,1917: Tech. Paper 109, Bureau of Mines, 1917, 19 pp. lC2oO-l--20 5...
