Page 49 - Pressure 10 class
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Mercury barometer:
A barometer that measures the atmospheric pressure with the help of
mercury column is called a mercury barometer. It was invented by
Evangelista Torricelli(1608-1647)
Construction;
❖ Mercury barometer consists of mercury.
❖ A simple mercury barometer can be made
with clean, dry, thick-walled glass tube of
about one meter long.
❖ The tube is sealed at one end and filled
with mercury.
❖ The tube is inverted over a trough with
mercury. The tube is fixed with the help of
a scale.
❖ A graduated scale is made on the tube to
measure atmospheric pressure.
July 30, 2020 Taranath Baral/GC Shiba/Suraj Thapaliya 49
