Thermometers intercomparing Reaumur, Celsius, and Fahrenheit temperature scales taken from "Naturwunder Im Reiche der Luft", Natural Wonders in the Realm of Air, 1870. Reamur, a temperature scale on which water freezes at 0 degrees and boils at 80 degrees. Celsius a temperature scale in which 0簞 represents the ice point and 100簞 the steam point. Fahrenheit temperature scale in which 32簞 represents the ice point and 212簞 the steam point.