A history of the growth of the steam-engine (1878)
Thurston, Robert Henry, 1839-1903 · New York, D. Appleton · leaf 333
to side wear of cylinder or piston. Thepacking-rings are self-adjusting, and work free but tight.The crank is counterbalanced ; the crank-pin, cross-head pin,piston-rod, valve-stem, etc., are made of steel; all the bear-ing surfaces are made extra large, and are accurately fitted ;and the best… … Pig. 93.—Vertical Stationary Steam-Engine. bearing each side of the double cranks. They aie built bysome constructors in quantities, and parts duplicated by STATIONARY ENGINES. 309 special machinery (as in fire-arms and sewing-machines),which secures great accuracy and uniformity of workman-ship,…
Steam-engines
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