A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 438
al air pump in which the vacuumis obtained bymeans of the fallof a stream of mer-cury. In the Sprengelmercury pump, Fig.456, the fall of a mer-cury stream causesthe exhaustion of areservoir connectedwith the verticaltube, by the mechan-ical action of themercury in entang-ling bubbles of air.These… … Fig. 456. Sprengels Mer-curial Air Pump. is heard. The exhaustion may be considered ascompleted when the bubbles entirely disappearfrom the column. The Sprengel pump produces a better vacuumthan the Geissler pump, but is slower in itsaction. In actual practice, the mercury that has fallenthrough…
Electricity · Electrical engineering
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