Sprengel Pump
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The Sprengel pump is a vacuum pump invented by Hanover-born chemist Hermann Sprengel in 1865 while he was working in London. The pump could be run continuously and without any supervision to achieve the lowest vacuum achievable at that time.
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Chemistry ApparatusSource
Benson John Lossing, ed. The New Popular Educator (London, England: Cassell & Company Limited, 1891)
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