Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 149
carefullyground brass plate, from thecenter of which a tube passesto the cylinder of the pump.The valve (b) at the end ofthis tube opens into the cylin-der. A second valve ($), oftenfor convenience located in the U piston itself, opens from the cylinder into the atmosphere.At every up-stroke the… … Fig. 80.—Air pump.
Physics
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