Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 62
height within the bell onaccount of the compressionof the air. But in modernpractice the air is forced infrom the surface througli aconnecting tube a (Fig. 48)by means of a force pump h.This arrangement, in addi-tion to furnishing a con-tinual supply of fresh air,makes it possible to forcethe water… … Fu 48. Laying foundations of pierswith the divine bell 46 PRESSURE IX AIR The pressure of the air ^vithiu the bell must, of course, bethe pressure existuig within the water at the depth of thelevel of the water inside the bell; that is, in Fig. 47 at thedepth J.C. Thus, at a depth of 34 feet the…
Physics
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