Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 144
Fig. 9-2. 102. Sprengel Air Pump.—A very efficient air pump. … Fig. 93. devised by Sprengel. is shown inFie. 93. C is a reservoir of mer-cury supported on a movable shelf.A. and connected through J and &to a vertical glass tube. F. about2.5 millimeters in diameter. Con-nection between F and the vesselto be exhausted at R is madethrough a bulb. E.…
Physics
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