 | Walter Otheman Snelling, Christian George Storm - Dynamite - 1913 - 98 pages
...a chapter on the explosion at the experimental mine, by GS Rice. 1912. 75 pp., 7 pis. BULLETIN 46. An investigation of explosion-proof mine motors, by HH Clark. 1912. 44 pp., 6 pis. BULLETIN 48. The selection of explosives used in engineering and mining operations, by Clarence Hall... | |
 | United States. Bureau of Mines - Mines and mineral resources - 1913 - 14 pages
...a chapter on the explosion at the experimental mine, by GS Rice. 1912. 75 pp., 7 pls. BULLETIN 46. An investigation of explosion-proof mine motors, by HH Clark. 1912. 44 pp., 6 pla. BULLETIN 48. The selection of explosives 'used in engineering and mining operations, by Clarence... | |
 | Mines and mineral resources - 1914 - 844 pages
...Northern Anthracite Coal Basin of Pennsylvania, by NH Darton. 1913. 33 pp., 8 pla., 5 figs. BULLETIN 46. An investigation of explosion-proof mine motors, by...HH Clark. 1912. 44 pp., 6 pis., 14 figs. BULLETIN 50. A laboratory study of the inflammability of coal dust, by JCW Frazer, EJ Hoffman, and LA Scholl,... | |
 | United States. Department of the Interior - 1914 - 986 pages
...sand available for hydraulic filling of anthracite mine workings. Is of local interest Bulletin 46. An Investigation of Explosion-Proof Mine Motors, by...HH Clark. 1912. 44 pp., 6 pis., 14 figs. Bulletin 47. Notes on Mineral Wastes, by CL Parsons. 1912. 44 pp. A review of the more important losses In the... | |
 | United States. Department of the Interior - 1914 - 1082 pages
...sand available for hydraulic filling of anthracite mine workings. Is of local interest Bulletin 48. An Investigation of Explosion-Proof Mine Motors, by HH Clark. 1912. 44 pp., 6 pis., 14 figs. Describes tests of several types of protective devices for mine motors, and states the effectiveness... | |
 | Tunneling - 1914 - 770 pages
...smashed. . . do Tip of bulb broken oft" do Bulb completely smashed . . . do do »° do • BULLETIN 46. An investigation of explosion-proof mine motors, by HH Clark. 1912. 44 pp., 6 pis. BULLETIN 48. The selection of explosives used in engineering and mining operations, by Clarence Hall... | |
 | Mineral industries - 1914 - 852 pages
...information of all persons interested in explosives and their safe and efficient use in mining work. APAS Selection of Explosives used in Engineering and Mining Operations. — By Clarence Hall and Spencer P. Howell. Bur. ilines, 1913, Bulletin No. 48, pages 1-50. This Bulletin deals with the characteristic... | |
 | Mines and mineral resources - 1915 - 1006 pages
...explosives used in metal mines and quarries, but has published some information about these explosives in Bulletin 48, " The Selection of Explosives Used in Engineering and Mining Operations " ; Technical Paper 17, " The Effect of Stemming on the Efficiency of Explosives"; and Miners' Circular... | |
 | Mines and mineral resources - 1915 - 934 pages
...northern anthracite coal basin of Pennsylvania, by NH Darton. 1913. 33 pp., 8 pis., 5 figs. BULLETIN 46. An investigation of explosion-proof mine motors, by HH Clark. 1912. 44 pp., G pis., 14 figs. BULLETIN 50. A laboratory study of the inflammability of coal dust, by JCW Frazcr,... | |
 | 1916 - 398 pages
...Anthracite Coal Basin of Pennsylvania, by N. II. Darton. 1913. 33pp., 8 pis., 5 figs. BULLETIN 46. An investigation of explosion-proof mine motors, by...HH Clark. 1912. 44 pp., 6 pis., 14 figs. BULLETIN 50. A laboratory study of the inflammability of coal dust, by JCW Frazer, EJ Hoffman, and LA Schol1,... | |
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BULLETIN 48. The selection of explosives used in engineering and mining operations, by Clarence Hall and SP Howell. 
