Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 68
172. STEVENS BOILER.—An early type of tubular boilers(1806), The principle is still in use- VWyyy-^-^^yyyy^-yy^y^-y^^yy^>^^yy,/yyy,.y^yyy^yyyyyyy^ … 173. PLAIN CYLIN-DRICAL BOILERS, s h o w i n gsuspension and setting. One-half the surface of the shells, divided by 10, equals boiler horse-power. 174. HANG-INGWATERDRUM CY-LINDRICALBOILER.— The drum, hanging from the main boiler by necks, gives a large in-crease of heating surface. One-half of…
Mechanical movements
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