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date: 24 October 2020


A Dictionary of Physics
Richard RennieRichard Rennie, Jonathan LawJonathan Law

A device for measuring *atmospheric pressure. The mercury barometer in its simplest form consists of a glass tube about 80 cm long sealed at one end and filled with mercury. The tube is then inverted and the open end is submerged in a reservoir of mercury; the mercury column is held up by the pressure of the atmosphere acting on the surface of mercury in the reservoir. This type of device was invented by the Italian scientist Evangelista Torricelli (... ...

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