Stewart, Balfour, 1828-1887 · Toronto : James Campbell · leaf 55
eservoir ;but as we have been taking awaythe air in the tube, this pressure ofouter air is no longer counter-balanced by that of the air in thetube; the outer air will therefore find itself unopposed,and will drive up the water into the tube, until at last,when all the air is taken away, the whole… … Fig. i3. OP GASES.] PBYSICt 45 lower valve be more than thirty feet. For you havejust been told that the pressure of the air will supporta column of water thirty feet high, but if the column behigher than this it will not support it. So that if therebe a greater distance than thirty feet between…
Physics
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