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Philosophical instructor, or, Webster's elements of natural philosophy : subdivided into principles and illustrations ; intended for academies, medical schools, and the popular class-room (1824)

Eaton, Amos, 1776-1842, Webster, John, fl. 1804-1824 · Albany : Printed by Websters and Skinners ... · leaf 118

An illustration from Philosophical instructor, or, Webster's elements of natural philosophy : subdivided into principles and illustrations ; intended for academies, medical schools, and the popular class-room, 1824, leaf 118
top of a column ofwater which counterbalances a column of the atmo-sphere of equal diameter. Illustration. The water in the cylinder of thepump, represented in the preceding figure, stands nolii-her than the water in the well, and the remainderofthe cylinder is empty, or rather occupied by air.Now,… … 116 COMMON LIFTING PUMP. open part of the cylinder. As the piston rises, the airwhich is contained between u and c becomes rarefied,and the elasticity of that portion of air which is con-tained in the cylinder, between the lower valve c andthe surface of the water in the well, forces open thelower…

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