Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 647
it is therefore to be re-garded as the point of application of the expansive force, andthe origin of the motion of the engine. The steam generatedin the boiler just described, and conveyed to the machine throughthe steam-pipe, is first received into the valve-chest b through the 622 CHEMICAL… … Fig. 441. The same valve also opens and closes the vent-hole a, by whichthe steam, after having done its work in moving tlie piston, isdischarged alternately from either end of the cylinder throughthe eduction-pipe U. When the valve is in the position repre-sented in Fig. 441, tlie steam has free…
Matter · Heat
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