Such a thermometer is used to know about the temperature of a place. If we want to know about the climate of a place, we must know about its temperature. It consists of a U shaped glass tube with two separate temperature scales set along each arm of U. One of these is for recording the maximum temperature encountered and the other join the maximum temperature. The arms of the U-shaped tube terminate in sealed glass bulb. Temperature is measured in centimetre grade or degrees of Fahrenheit.
