it measure the atmosphere.
The pressure of air.
Barometers are used to measure pressure.
mercury barometers and aneroid barometers both measure air pressure.
Barometers measure air pressure, and can be used to predict weather conditions
Barometers are used to measure pressure.
Some of the weather equipment are: Radars, Barometers, Thermothers, and Rain Gauges. This is just some of many and the world advances.
To measure pressure.
Found out myself, Millibars
to measure atmospheric pressure
No! Barometers are not related to maths. They are devices used to measure atmospheric pressure... You may not be able to use barometers for maths project. - Abid
They allowed scientists to measure pressure.
Digital barometers, much like analog barometers, are used to forecast the weather using humidity, air pressure, and dew point. This answer needed a few more characters.