Question

use of fortin barometer

Answer 1

In the Fortin barometer, the level of mercury in the glass at the bottom of the barometer cistern is adjusted to a scale zero, known as the fiducial point, each time a reading is to be taken. ... The Fortin barometer is simple to useas it has a clear easy-to-read linear scale.




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Answer 2

Fortin Barometer is an air pressure on the free surface of the mercury in the cistern supports the column of mercury, the length of which is read by a vernier, operated by a rack and pinion over a graduated scale marked on the casing, The Fortin Barometer was commonly used at meteorological stations to measure atmospheric pressure.