A descriptive and historical account of hydraulic and other machines for raising water (1850)
Ewbank, Thomas, 1792-1870 · New York, Bangs, Platt, & Co. · leaf 246
rmer is raised. Now the atmosphere rests equally on both orifices ofthe pipe, the open one in the well, and the other covered by a valve atthe bottom of the cylinder: in other words, it presses equally on thewater in the cylinder and in the well which covers both ;a but when by aNot absolutely so,… … ?Jo. 90. Common Metallic Pump. the depression of the handle or lever, the sucker is raised, this equality isdestroyed, for the atmospheric column over the cylinder, and consequently over the valve O is lifted up, andsustained by the sucker alone; ittherefore no longer presses on theupper orifice,…
Pumping machinery
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