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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A late Victorian English combination barograph and clock eight day fusee drive clock with half seconds. Pendulum drives the vertical chart drum and taps the barometer every hour. The aneroid barometer is linked by a fusee watch chain over a pulley to a poi

Weather gauge set clock, thermometer and barometer mounted on jarrah backing. Length 49.5 cm

Antique French Henri II clock/barometer combination 90 cm high

Walnut cased clock, barometer and thermometer set

An American parker silver plated desk clock and barometer

French walnut eight day strike combination clock/barometer and thermometer with applied cast spandrels.

A 19th century oak framed combination clock and barometer, the pierced and foliate carved stand inset with a time piece and a barometer. Height 43 cm

Rare 19th century French 'Marine' automatic combination time piece enamelled ormolu and onyx rotating lantern top with twin clock dials, thermometer and aneroid barometer driven by a separate movement to the bollard base. Height 52 cm

Late 19th century French carved clock/barometer station with enamel Chapters

Mahogany wall barometer and clock, London, 1780 banjo shaped, the circular steel face inscribed F. Amadio, 65 Moorgate Str, near the Bank of England. Length 126 cm. Width 36 cm

A 1930's mantle clock, barometer and thermometer by Sir John Bennett of London (Clockmaker to Royalty and the Nobility)

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