Two thermometer scales are in general use, the Fahrenheit, which is generally used in engineering, and the Celsius, which is almost universally used in scientific work. The Fahrenheit scale has the freezing point at 32 degrees F and the boiling point at 212 degrees F, whereas the Celsius scale has the freezing point at 0 degrees C and the boiling point at 100 degrees C. The Celsius scale is commonly called the centigrade scale.