They are made of metal or glass and strengthened through thermal tempering or annealing. The way a laboratory thermometer works depends upon its type. They are generally a liquid-in-glass device, a ...

The liquid expands as the temperature rises in the tube and indicates the temperature. The basic design for this type of thermometer is a small-bore glass tube with a thin-walled glass bulb at the ...

Equipment: A Galileo's thermometer (a sealed liquid filled glass cylinder containing sealed glass floats labeled 18, 19, 20, 21, 22, 24 and 26 degrees C), a 4 liter ...