Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 73
THE AIR-PUMP. 57 air-pump; the surrounding: air (in other words, *he outside pressure) isremoved, and the enclosed air then bursts the bottles, throwing frag-ments of glass in all directions. At every point, then, in a body of air, force? are acting out-wards. Tlie air is somewhat like a spring…
Physics
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