We can easily tell the state of atmosphere by using various instrument to measure the state of atmosphere. Barometer is ancient scientific tool which is used in measuring atmospheric pressure.
EXPLANATION:
The device is made out of tube made from glass. The instrument is filled with "mercury" which is placed upside down. Atmosphere temperature can be measured by using atmospheric thermometer.
This device can measure temperature indoor as well as outdoor. Mercury or colored alcohol is the constituent of atmospheric thermometer.
