A barometer is an instrument for measuring atmospheric pressure, used in weather forecasting,
as well as for determining elevation.nbsp; Mercury is often used in precision barometers.
A column of mercury standing 760 millimeters tall is used to reference one standard atmosphere
of pressure at sea level.
Some people enjoy building or otherwise owning a personal weather station, in order that they can
document existing weather conditions, as well as make predictions as to future weather in their vicinity.
