Bulletin, Issue 4; Issue 7; Issues 19-21

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U.S. Government Printing Office, 1911 - Mines and mineral resources
 

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Page 11 - ... and compared with the coal itself reduced to powder was found deprived of the greater portion of the bitumen and, in some instances, entirely destitute of it. There is every reason to believe that much coal gas...
Page 34 - BULLETIN 323. Experimental work conducted in the chemical laboratory of the United States fuel-testing plant at St. Louis, Mo., January 1, 1905, to July 31, 1906, by NW Lord. 1907.
Page 35 - BULLETIN 339. The purchase of coal under government and commercial specifications on the basis of its heating value, with analyses of coal delivered under government contracts, by DT Randall. 1908. 27 pp. 5 cents. BULLETIN 343.
Page 35 - BULLETIN 393. Incidental problems in gas-producer tests, by RH Fernald, CD Smith, JK Clement, and HA Grine.
Page 17 - If the place where a shot is to be fired is dry and dusty, then the shot shall not be fired unless one of the following conditions is observed, that is to say...
Page 57 - The following publications, except those to which a price is affixed, can be obtained free by applying to the Director...
Page 17 - ... watering would injure the roof or floor, unless the explosive is so used with water or other contrivance as to prevent it from inflaming gas or dust, or is of such a nature that it can not inflame gas or dust.
Page 57 - BULLETIN 332. Report of the United States fuel-testing plant at St. Louis, Mo., January 1, 1906, to June 30, 1907; JA Holmes, in charge. 1908. 299 pp. BULLETIN 334. The burning of coal without smoke in boiler plants; a preliminary report, by DT Randall.
Page 17 - The occurrence of a blown-out shot in working places where very highly inflammable coal dust exists in great abundance, may even in the total absence of fire-damp possibly give rise to violent explosions, or may at any rate be followed by the propagation of flame through very considerable areas...
Page 14 - In the complete absence of fire damp, coal dust exhibits some tendency to become inflamed when passing a very large lamp flame at a very high velocity. If exposed to the action of a large volume of flame, as from the explosion of gunpowder, it exhibits a decided tendency to propagate flame. But so far as can be determined by experiments on a moderate scale, this tendency is of a limited nature. Professor Abel, in giving evidence at the Seaham inquest, said that "if coal dust alone would have exploded...

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