something
A barometer to measure air pressure.
Barometer is the tool to measure air pressure
The barometer is the instrument that is used to measure the air pressure.
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barometer
pressure gauge
The device used to measure air pressure is called a barometer. It can be either an aneroid barometer or a mercury barometer, both of which are commonly used to measure atmospheric pressure.
Meteorologists use a barometer to measure air pressure. A barometer can be either an aneroid or a mercury type and helps meteorologists predict changes in the weather based on differences in air pressure.
He would use it to measure air pressure.
barometer
a barometer... and it is invented by torricelli..
They use barometers to measure the atmospheric pressure. The lower the pressure the more likely there is weather coming. The higher the air pressure the more likely the skies will either become mostly sunny or totally clear off and bring sunny skies.