Hermann Johann Philip Sprengel was a German chemist and physicist. He was born in 1834 near Hanover and died in 1900. He came to England in 1859 to work at Oxford and afterwards London. He is mainly associated with the Sprengel pump, used for obtaining high vacua by the fall of drops of mercury in a narrow tube, and his work on explosives. Research Hermann Sprengel
The Sprengel pump is a device used for obtaining high vacus. It was invented by the German chemistHermann Sprengel and consists essentially of a vertical capillary glass tube, its upper end communicating with a funnel by means of a rubber tube which can be compressed as required. Below the rubber connexion is a lateral branch of the glass tube to the vessel in which a vacuum is desired. The lower end of the tube is bent and dips into a trough. The funnel is filled with mercury, which is allowed to drip past the lateral connexion, and in doing so traps a portion of the air from the vessel and carries it down the tube. The continued application of the method finally exhausts the air from the vessel. The Sprengel pump is also used for collecting gases. Research Sprengel Pump
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Research Hermann Sprengel
