Scale (Réaumur scale) briefly (°Ré, °Re, °R) A temperature measurement. In this scale the temperature of melting ice and boiling water, fashion opinion has been that, respectively, 0 and 80 have not been considered. The name of this scale derives from the name of René Antoine two that this measure, in the year 1730, introduced.

thermometer to help the alcohol worked and average zero it on the basis of the temperature of melting ice have adjusted the tube that the alcohol in which it was to a thousandth of a degree graded. changes the volume of alcohol at a time when the water to the boil can come up with the number 80 °Ré — display alliance, that in this degree the alcohol 8 expander more. He alcohol instead of mercury chose because it changes volume, it was more, but this choice was that the thermometer he was too bulky and big. and the boiling temperature of low alcohol use from it for many consumers is limited.