A descriptive and historical account of hydraulic and other machines for raising water (1842)
Ewbank, Thomas · Tilt & Bogue · leaf 305
Rotary Pump from Serviere . 285 Chap . 5 . ] turn close to those of the case , so that water cannot enter between them . The axle of one of the wheels is continued through one side of the case , ( which is removed in the figure to show the interior, ) and the opening made tight by a stuffing box or… … which were so geared that the longer No . 131 . Rotary Pump from Serviere . axis of one wheel might coincide ( in one position ) with the short one of the other . Sometimes a groove is made along the face of each cog , and a Strip of leather or other packing se - cured in it . The pump figured…
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