'Mercury & aneroid are the 2 main types of this instrument used to measure air pressure'
Barometer
HODGEPODGE: Mercury & aneroid are the 2 main types of this instrument used to measure air pressure
Mercury & aneroid are the 2 main types of this instrument used to measure air pressure
Mercury & aneroid are the 2 main types of this instrument used to measure air pressure
HODGEPODGE
Barometer
HODGEPODGE