Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 383
Tllllllllllllll Fig. &34. Fig. 833. Fig. 833 is a section of a single Worth-ington steam-pump, one of a pair alwaysplaced side by side (hence called duplex),combined to act reciprocally on the steam-valves of each other. In the form of pump shown, the lengthof barrel is about equal to the…
Mechanical drawing
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