Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 115
ing that the surface of liquidsis always perpendicular to the direction of force actingupon them. Consequently the surface of a still pond orlake is always level, since it is everywhere perpendicular togravity. In the case of the ocean or of large bodies ofwater generally, the direction of gravity… … is also strictly spherical, but in such small distances thedeparture from a strict plane is not noticeable. 112. Buoyancy.—From what we have learned thus far weknow that any object which sinks beneath the surface of aliquid will have pressure exerted upon it proportional tothe depth which it sinks…
Physics
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