Learn about Barometer

The barometer is an instrument for measuring atmospheric pressure. The pressure indicated can aid in predicting short term weather.

There are two main types of barometer in use, the mercury barometer, which can either be in the form of a "stick" or a "wheel", and the aneroid barometer, a later invention and most commonly available.

Italian Evangelista Torricelli, an associate of Galileo, is generally credited with inventing the mercury barometer in 1643. Galileo suggested to Evangelista Torricelli that he use mercury in his vacuum experiments.

A mercury barometer has a glass tube with a height of at least 84 cm, closed at one end, with an open mercury-filled reservoir at the base. The weight of the mercury creates a vacuum in the top of the tube. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. more...
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Fine antique early 19th century bronze architectural form desk thermometer and calendar with marble base, each approx 23 cm high (2)

Pocket Barometer in a leather case lined with green velvet. Dial marked 'Compensated. W. Littlejohn & Son Wellington'. The front bezel rotates & is calibrated in feet. Late 19th century. 5 cm diameter

Very fine gilt metal pocket barometer by A&N; C.O.S.L. Very fine gilt metal pocket barometer by A&N C.O.S.L

Sterling silver pocket barometer. J. Hicks London, 10 Hatton Garden & later Clerkenwell. Hallmarked London 1902. Inscription: 'Henley Sailing Club 1902'

An English travelling compensated barometer and leather carrying case, first half 20th century, retailed by Kilpatrick & Co., Melbourne, the silvered dial within a metal drum case, the revolving glazed bezel with a magnifying disk. Diameter 10.5 cm (barome

Sterling silver desk thermometer, Birmingham 1901

Aneroid Barometer in a silver travelling case, Birmingham 1899

A c.1900 English 'Compensated' pocket Barometer/inclinometer, gilt pocket watch type case, the silvered dial with two different scales, in original leather fitted case. Diameter 5.1 cm

Travelling thermometer, cased, pocket sized, c1870s, made by Pastorelli & Co. London, a leading maker of scientific instruments. Mercury and glass in fine condition, working, 8 cm x 2 cm.

A Victorian pocket barometer, with a brass case and moving outer ring. Maker F.L. West, London. Diameter 5 cm

An American parker silver plated desk clock and barometer

A pocket barometer compensated by Elliott Brothers, the strand London. Diameter 5 cm, in original leather case

A cased travelling field barometer 19th century 19 x 18 cm by G. Falconer & Co. Hong Kong rosewood and brass case

An early 20th century French brass combination desk timepiece, the twin arched case set with an enamel Roman dial to the right hand side and an aneroid barometer to the left 22 cm wide

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