ch a columnof mercury i)lays the part of a piston,kind is that represented in Fig. 76. To a certain extent, all air pumps are identical inprinciple. In each of them a given mass of gas occupyinga volume V is made to occupy a larger volume, V+ U, andthen the portion occupying U is mechanically… … Fig. 75. Of the latter 288 Hydrostatics and Elementary Hydrokinetics. The mercury pumps of Geissler and Sprengel are freefrom this drawback. AB is a g-lass tube of greater leno-th than the height ofthe mercury barometer, having- part of the Torricellian
Hydrostatics · Hydrodynamics
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