. The Americana : a universal reference library, comprising the arts and sciences, literature, history, biograhy, geography, commerce, etc., of the world . used serious trouble. Prof. Curtis, of New York, has designed Prof. Curtis believes in few wheels of largediameter. Prof. A. Rateau, of Paris, has workedout a multiple step impulse steam-turbine, con-sisting of a number of Pelton or Laval wheelsarranged in series on a shaft, each wheel re-volving in a separate chamber. Distributingnozzles convey the steam to the wheel vanes,and the whole of the expansion is accomplishedwithin the fixed nozz
. The Americana : a universal reference library, comprising the arts and sciences, literature, history, biograhy, geography, commerce, etc., of the world . used serious trouble. Prof. Curtis, of New York, has designed Prof. Curtis believes in few wheels of largediameter. Prof. A. Rateau, of Paris, has workedout a multiple step impulse steam-turbine, con-sisting of a number of Pelton or Laval wheelsarranged in series on a shaft, each wheel re-volving in a separate chamber. Distributingnozzles convey the steam to the wheel vanes,and the whole of the expansion is accomplishedwithin the fixed nozzles. The steam leaves thechambers at almost the same pressure at whichit enters, the wheel vanes merely receiving theimpulse due to the velocity of the particles;there is therefore in this case no tendency toleakage and no necessity for clearance. The Doiu Turbine.—The turbine invented byDow is an inward-flow wheel with concentricsets of guides and vanes in series, and is said tohave attained 35,000 revolutions per minute,working regularly at 25,000, consuming 45pounds of steam per horse-power per Dow turbine, as built for work in connec-.
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