Wikipedia on aneriod barometers
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An aneroid barometer is an instrument used for measuring air pressure as a method that does not involve liquid. Invented in 1844 by French scientist Lucien Vidi, the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule), which is made from an alloy of beryllium and copper.
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An aneroid barometers is an instrument used for measuring air pressure as a method that does not involve liquid.
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