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“The common pump consists of a hollow tube, the lower part of which, descending into the water, is called the suction-pipe, and the upper part, b, the battel or cylinder; of a spout, s, at the top of the cylinder; of an air-tight priston, which works up and down in the cylinder; and of two valves, both opening upwards, one of which, g, is placed at the top of the suction-pipe, and the other, p, in the piston.” — Wells, 1857


Fluid Pumps


David A. Wells The Science of Common Things; A Familiar Explanation of the First Principles of Physical Science98


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