A history of the growth of the steam-engine (1878)
Thurston, Robert Henry, 1839-1903 · New York, D. Appleton · leaf 144
exhaust at thetop and the steam at the bottom. When the entrance ofSteam at the top and the removal of steam-pressure below JAMES WATT AND HIS INVENTIONS. 119 the piston has driven the piston to the bottom, the pin, R,strikes the lever, m, opening the steam and closing theexhaust valve at the… … Fis. 31.—Boulton & Watts Double-Acting EDgiue, 1784. The earliest engines of the double-acting kind, and ofany considerable size, which were built to turn a shaft, werethose which were set up in the Albion Mills, near Black-friars Bridge, London, in 1786, and destroyed when themills burned down…
Steam-engines
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