A history of the growth of the steam-engine (1878)
Thurston, Robert Henry, 1839-1903 · New York, D. Appleton · leaf 148
Pig. 88.—Watts Half-Trunk Engine, ITM. piston, and O its rod, encased in the half-trunk, D. Theplug-rod, 6r, moves the single pair of valves by striking thecatches, £J and JF] as was usual with Watts earlier engines. JAMES WATT AND HIS INVENTIONS. 123 Watts steam-hammer was patented at the same… … Fia. 84.—The Watt Hammer, 1784. M, works the hammer-helve, Z J] and the hammer, i. Thebeam, F G,\bz, spring, and the block, iVj the anvil. Watt found it impossible to determine the duty of hisengines at all times by measurement of the work itself,and endeavored to find a way of ascertaining the…
Steam-engines
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