![Engraving depicting Hermann Sprengel's vacuum pump. Hermann Sprengel (1834-1906) a German-British chemist. Dated 19th Century Stock Photo - Alamy Engraving depicting Hermann Sprengel's vacuum pump. Hermann Sprengel (1834-1906) a German-British chemist. Dated 19th Century Stock Photo - Alamy](https://c8.alamy.com/comp/KJ1JNJ/engraving-depicting-hermann-sprengels-vacuum-pump-hermann-sprengel-KJ1JNJ.jpg)
Engraving depicting Hermann Sprengel's vacuum pump. Hermann Sprengel (1834-1906) a German-British chemist. Dated 19th Century Stock Photo - Alamy
1816 [Menlo Park,] Oct 2d 1879 Changes in [---]a pump in two weeks.1 Combination with Geissler.2 Macleod Guage.3 Cu. tube for ab
![Scientific amusements . receiver. Manyexperiments are made with the assistance of the air-pumpand receiver, though the air is never entirely exhaustedfrom the glass. The Sprengel air-pump is used to create an almostperfect Scientific amusements . receiver. Manyexperiments are made with the assistance of the air-pumpand receiver, though the air is never entirely exhaustedfrom the glass. The Sprengel air-pump is used to create an almostperfect](https://c8.alamy.com/comp/2AXCDDD/scientific-amusements-receiver-manyexperiments-are-made-with-the-assistance-of-the-air-pumpand-receiver-though-the-air-is-never-entirely-exhaustedfrom-the-glass-the-sprengel-air-pump-is-used-to-create-an-almostperfect-vacuum-by-putting-a-vessel-to-be-exhausted-inconnection-with-the-vacuum-at-the-top-of-a-tube-ofmercury-thirty-inches-high-some-air-will-bubble-outand-the-mercury-will-fall-by-filling-up-again-and-repeat-ing-the-process-the-air-vessel-will-in-time-be-completelyexhausted-this-is-done-by-mr-sprengels-pump-and-apractically-perfect-vacuum-is-obtained-like-the-torricelli-2AXCDDD.jpg)
Scientific amusements . receiver. Manyexperiments are made with the assistance of the air-pumpand receiver, though the air is never entirely exhaustedfrom the glass. The Sprengel air-pump is used to create an almostperfect
![Mercury Pumps For Producing Vacuums 19th Century Stock Illustration - Download Image Now - 1870-1879, 19th Century, Airtight - iStock Mercury Pumps For Producing Vacuums 19th Century Stock Illustration - Download Image Now - 1870-1879, 19th Century, Airtight - iStock](https://media.istockphoto.com/id/1011482638/vector/mercury-pumps-for-producing-vacuums-19th-century.jpg?s=612x612&w=0&k=20&c=a3goB3orcrrc3-H4A2-iye2q7FPmOIDqeKAXSjAMIro=)