A descriptive and historical account of hydraulic and other machines for raising water, ancient and modern : with observations on various subjects connected with the mechanic arts: including the progressive development of the steam engine (1876)
Ewbank, Thomas, 1792-1870 · New York : Scribner, Armstrong · leaf 276
, its defects ; for in elevating tne piston the whole weight cf theatmosphere above it has to be ove.-come, a disadvantage that in large ma-chines would not be compensated by the saving of a valve. As the pistonhas to pass the holes in the upper part of the cylinder, its packing wouldbe injured if… … No. 116. No. 117. Siugle-Valve Forcing Puiups. Chap. 3.] Ooutvivn Forcing Pump. 263
Pumping machinery
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