A history of the growth of the steam-engine (1878)
Thurston, Robert Henry, 1839-1903 · New York, D. Appleton · leaf 133
hat the condensation of steam doing workchanges this law in a marked manner; but the condensationand reevaporation of steam, due to the transfer of heat to 108 THE DEVELOPMENT OF THE MODERN STEAM-ENGINE. and from the metal of the cylinder, tends to compensatethe first variation hy a reverse change… … Fig. 28.—Expansion of Steam. greater than when working without expansion. The prod-uct of the mean pressure by the volume of the cylinder isless, but the quotient obtained by dividing this quantity bythe volume or weight of steam taken from the boiler, ismuch greater with than without expansion.…
Steam-engines
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