Gilley, Frank M · Boston, Allyn & Bacon · leaf 262
lug, P, and boil the water. Insert the plug and pour cold water on the testtube. Heat the water again. m a Fig. 219. THERMOD TNAMICS. 251 275. Newcomens Engine. — Eeplace the liquid piston ofmercury (Fig. 219) by a solid piston (Fig. 220). On boilingthe water the piston is forced up. The steam is… … Rg. 220. 276. Atmospheric or Vacuum Engine. — The work-ing form of Newcomens engine, which was never used for anything butpumping, is more likeFig. 221. Suppose thepiston is at the bottomof the cylinder. Thevalve, V, is opened, andsteam from the boiler, B,at a pressure of one ortwo pounds to the…
Physics
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