Hydraulic Machine Exerting Pressure

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Illustration of a hydraulic machine. “A principle known as Pascal’s Law states that pressure exerted on a liquid in a closed vessel is transmitted equally and undiminished in all directions.” If a, A, p, and P respectively represent the areas and pressures, then the following proportion holds: a:A = p:P.


Claude Irwin Palmer Practical Mathematics for Home Study (New York, NY: McGraw-Hill Book Company, Inc., 1919)


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