Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Barley to Bellows, George Wesley

Barometer

air

Barometer, instrument for measuring air pressure, used in weather forecasting and for determining altitude. Most commonly encountered is the aneroid barometer, in which the effect of the air in compressing a thin corrugated metal box is amplified mechanically and read off on a scale.

See also: Altimeter.

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