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absorbed absorption amount apparatus applied average Bulletin capacity carried cause cent charge close coal dust coke Colliery combustion constant containing cubic curves damp determined developed diameter difference discussion effect engine equation experiments explosion feet figure fire flame flow flues fuel bed furnace gallery gases given gives grams heating surface higher humidity ignition inches increase indicated inflammable initial temperature length less lower matter means measured meters method mines mixture moisture nearly observations obtained particles passing pipe placed plate pounds powder practically present pressure drop produced propagation proportional quantity reduced relation relative remains resistance samples shot shown side sprays square station steam Table temperature tests thickness tion true boiler efficiency tubes United varying velocity weight weight of air
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 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.