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Sprengel pump   Listen
noun
Sprengel pump  n.  (Physics) A form of air pump in which exhaustion is produced by a stream of mercury running down a narrow tube, in the manner of an aspirator; named from the inventor.






Collaborative International Dictionary of English 0.48








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"Sprengel pump" Quotes from Famous Books



... October, 1879, we made lamps of paper carbon, and with carbons of common sewing thread, placed in a receiver or bulb made entirely of glass, with the leading-in wires sealed in by fusion. The whole thing was exhausted by the Sprengel pump to nearly one-millionth of an atmosphere. The filaments of carbon, although naturally quite fragile owing to their length and small mass, had a smaller radiating surface and higher resistance than we had dared hope. We had virtually reached the position and condition ...
— Artificial Light - Its Influence upon Civilization • M. Luckiesh



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