Fire Engine

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“The fire engine is a modification of the forcing pump. It consists of two such pumps, the pistons of which are moved by a lever whith equal arms, the common fulcrum being at C.” -Comstock 1850


fire, engine, pump, forcing


J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 163


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