Hydraulic Press

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“The pump barrel, a, b, is represented as divided lengthwise, in order to show the inside. The piston, c, is fitted so accurately to the barrel, as to work up and down water tight; both barrel and piston being made of iron. The thing to be broken or pressed, is laid on the flat surface, i, there being above this, a strong frame to meet the pressure, not shown in the figure. The small forcing pump, of which d is the piston, and h, the lever by which it is worked, is also made of iron.” —Comstock, 1850


J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 109


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