Smith, J. Hamblin (James Hamblin), 1829-1901 · Toronto : A. Miller · leaf 64
the instrument underthe receiver of an air pump. Then as the air is exhausted*the mercuiT will sink in the tube, and if all the air could bepumped out the mercury would sink entirely into the vessel.This experiment proves that the pressure of the air on theexposed surface of the mercury in the… … Take in the surface of the mercury in the basin an area Mequal lo the area of the horizontal section of the tube at D. Then area M= area of the base of the column of mercuryin the tube, and since these areas are equal and in the samehorizontal plane, the pressures on them are equal. Now pressure…
Hydrostatics
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