A: A barometer is a device to measure pressure. From the 17th to the 19th centuries, most designs had the same working principle: air pressure pushed down on an open column of fluid, which was allowed ...

Knowing the air pressure is really important in forecasting as it can indicate short term changes in the weather. The instruments that measure air pressure are called 'barometers'. They work by ...

Aneroid: The literal meaning is “not wet”; containing no liquid. Usually it describes a kind of barometer that contains no liquid (mercury): an aneroid barometer. Chicago Bears returned from London ...

THE British Association has recently received from Miss Hooker, daughter of Sir Joseph Hooker, a gift of the aneroid barometer which used to hang by the fireplace in Charles Darwin's ‘old study’ at ...