I.C.S. reference library : a series of textbooks prepared for the students of the International Correspondence Schools and containing in permanent form the instruction papers examination questions, and keys used in their various courses (1904)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 338
of the atmosphere on the waterbelow it. 74. Pliingrer Ptimps.—When force pumps are used toconvey water to great heights or to force water againstheavy pressures, thegreat pi:essure ofthe water makes itextremely difficultto keep the waterfrom leaking pastthe piston, and the Kconstant repairingand… … 52 MECHANICS OF FLUIDS. 6 does not differ in any way from that of the piston forcepump. During the up stroke of the plunger, the suctionvalve is open and the delivery valve is closed; during thedown stroke, the suction valve is closed and the deliveryvalve is open. 75. The force pumps shown so far…
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