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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 64

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary, 1917, leaf 64
172. STEVENS BOILER.—An early type of tubular boilers(1806), The principle is still in use- 173. PLAIN CYLIN-DRICALBOILERS,showingsuspension and setting. One-half the surface of the shells, divided by 10, equals boiler horse-power. … w rr 174. HANG-ING WATERDRUM CY-LINDRICALBOILER.— The drum, hanging from the main boiler by necks, gives a large in-crease of heating surface. One-half of shell and all of drum surface.divided by 12, equals boiler horse-power.

Mechanical movements

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