Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 141
nt withthe law is closer. No minimum value of pv for hydrogen has been found,and this value must occur, if at all, for pressures less thanone atmosphere. The value of pv for hydrogen is alwaysgreater than Boyles law requires. 104. The Air-Pump. — The air-pump was invented byOtto von Guericke. Its… … Fig- 64. in a cylinder communicating with the air by a valve atits upper end opening outward, and with the receiver Eby a valve S at its lower end. When the piston ascends8 is closed and 8 is open. The gas expands and fills thecylinder. During the downward stroke S is open and S1 MECHANICS OF…
Physics
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