Bulletin, Issues 18-21

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U.S. Government Printing Office, 1912 - Mines and mineral resources

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Page 5 - ... 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 169 - BULLETIN 7. Essential factors in the formation of producer gas, by JK Clement, LH Adams, and CN Haskins. 1911. 51 pp., 1 pi. BULLETIN 8. The flow of heat through furnace walls, by WT Ray and Henry Kreisinger.
Page 111 - ... is proportional to the difference between the fourth powers of the absolute temperatures of the systems.
Page 11 - 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 51 - The following publications, except those to which a price is affixed, can be obtained free by applying to the Director...
Page 105 - ... proportional to the difference between the fourth powers of the absolute temperatures of the hot parts of the furnace and the boiler plate.
Page 11 - ... 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 88 - Now the rate of this diffusion has been shown from various considerations to depend on two things : — • 1. The natural internal diffusion of the fluid when at rest. 2. The eddies caused by visible motion which mixes the fluid up and continually brings fresh particles into contact with the surface.
Page 52 - 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.
Page 88 - The heat carried off by air or any fluid from a surface, apart from the effect of radiation, is proportional to the internal diffusion of the fluid at and near the surface...

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