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Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools (1867)

Sangster, John Herbert, 1831-1904 · Montreal : Printed and published by John Lovell · leaf 103

An illustration from Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools, 1867, leaf 103
air confined above a is equal to the weightof the whole column on a before the stop-cock wasclosed. Hence the elasticity of the air is equal to its weightwhich is equal to a column of mercury 30 inches high. If now we pour mercury into the tube until the air confined above a isccmpressed into half… … Arts. 222-225.] PNEUMATICS. 101 air confined in the shorter tube and have decreased its volume to ouo-halfits former dimensions, and at the same time doubled its elastic force, sinceit now reacts against the surface of the mercury with a force equal to 30lbs. to tne square iuch. If \Ye increased…

Physics

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