Fortin barometer

What is Fortin barometer?

Fortin barometer definition and meaning on Dictionary terms:
noun
an adjustable cistern barometer, the most common of those employing mercury.

Origin of Fortin barometer1870a??75; named after J. Fortin (1750a??1831), French physicist who invented it

 

reference: https://www.dictionary.com/browse/fortin-barometer

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