The steam engine familiarly explained and illustrated; with an historical sketch of its invention and progressive improvement; (1836)
Lardner, Dionysius, 1793-1859, Renwick, James, 1790-1863. [from old catalog] · Philadelphia, E. L. Carey & A. Hart · leaf 175
Pl.X. JTtg. -J-6\ … £rwi: tyJP.JKUvfriek. DOUBLE-CYLINDER ENGINES. 143 above the surface of the liquid in h forces it through i intothe boiler. When the air accumulates in too great a degreein h, the surface of the liquid is pressed so low that the ballfalls and opens the valve, and allows it to escape. The airin h is…
Steam-engines
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