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absorbed air current air passing Altofts amount apparatus ash pit bed of shot black powder boiler horsepower boiler water briquets Bulletin calcium chloride capacity carbon cent centimeters coal dust coal-dust explosions coke colliery explosions constant convection cubic cubic foot curves density diameter distillation dry surface dust explosions effect engine equation experiments figure fire damp fire-tube boilers flame flues fuel bed furnace gallery Geological Survey grams heat absorption heat transmission heating plate ignition increase inflammable initial temperature Inst investigations laboratory length Lievin lower bed meters methane method mixture moisture obtained P.ct paraffins particles pipe Pittsburg pounds propagation quantity of heat radiation rate of heat relation samples sprays square feet square roots stoker stone dust tests thickness tion total pressure drop Trans true boiler efficiency tubes uptake vapor velocity volatile matter water-tube boiler weight of air weight of gases
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 113 - ... is proportional to the difference between the fourth powers of the absolute temperatures of the systems.
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 107 - ... proportional to the difference between the fourth powers of the absolute temperatures of the hot parts of the furnace and the boiler plate.
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 90 - 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 58 - 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.