Voltaic pile was the first device that produced a continuous electric current. The first piles constructed by the Italian physicist Alessandro Volta (1745-1827) in 1800 comprised alternating silver and zinc discs separated by cardboard soaked in brine. The pile can be stacked as high as you like, and each layer will increase the voltage by a fixed amount.
The water jet vacuum pump or vacuum aspirator is one of the most popular devices that produces vacuum in laboratories. The rapid flow of water through the device creates a vacuum in a side-arm that is connected to a vacuum application such a Buchner flask. The water jet vacuum pump creates a vacuum by means of Venturi effect named after the Italian physicist Giovanni Battista Venturi (1746–1822). The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section of pipe. Water jet pumps are manufactured of glass, plastic or metal, depending on the conditions in which they are used.
Generalic, Eni. "Italy indeed." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.
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