A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 184
is then againraised, and the whole operation is repeated,—a barrel-full of air being drawnout from the receiver as often as the piston ascends, and expelled from thebarrel as it descends. At last the air in the receiver becomes so rare that ithas not sufficient elasticity to open the valve at the… … THE DOUBLE-BARRELLED AIR-PUMP. 180 PNEUMATICS. 428. Double-barrelled Air-pump.—£The double-bar-relled air-pump (Fig. 188) acts on the same principle asthe single-barrelled pump,, but exhausts the air more rapid-ly in consequence of having two barrels, A, B, and twopistons, C, D. Each piston is…
Physics
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