Glass reservoir containing colored alcohol (methanol, ethanol) that expands and rises in the capillary bore as the temperature rises.
F degrees
Symbol representing a unit of measurement on the Fahrenheit scale (Fahrenheit degree).
alcohol column
Quantity of alcohol that is contained in the glass tube; its height varies with the temperature.
Fahrenheit scale
Temperature scale that is used in some English-speaking countries, on which the freezing point of water is at 32 and the boiling point at 212.
C degrees
Symbol representing a unit of measurement on the Celsius scale (Celsius degree).
Celsius scale
Temperature scale that is based on a graduation from 0 (freezing point of water) to 100 (boiling point of water); it was formerly called the centigrade scale.
