The elements of natural and experimental philosophy .. (1834)
Phillips, R. (Richard), Sir, 1767-1840, Smith, E. A · New York, M'Elrath, Bangs & Herbert · leaf 93
. CXXVIII. Air-pumps are machines con-structed for the purpose of exhausting the air 291. What is said concerning the compressibility of air 1 292. Whatis to be understood by the elasticity, or expanding nature of the atmos-phere 1 293. How is the elasticity of the atmosphere illustrated 1 294.What… … In this figure, a a represents two brass barrels, each containinga piston, with a valve opening upwards. The pistons are workedby means of the winch 6, which moves them up and down alter-nately. On the wooden frame d e, there is a brass plate g, ground *The air-pump was first invented by Otto…
Physics
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