Greenhill, G. (George), Sir, 1847-1927 · London and New York, Macmillan and Co. · leaf 47
d experimentallyby noticing that the isolated portions of the free surfaceof a homogeneous liquid, filling a number of communi-cating vessels of arbitrary shape, all form portions of thesame horizontal plane. The principle is employed not only in the design ofwaterworks, but also in the theory of… … Fig. 19. Draw any horizontal planes AB, CD in the upper and lower liquids z feet apart and draw vertical lines AG, BD cutting the surface of separation of the liquids in P and Q ; and let AP = x,BQ = y; so that (fig. 19) PG=z-x,QD = z-y. STABILITY OF EQUILIBRIUM. 37 Let w denote the density or…
Hydrostatics
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