Old Temperature Converter

A French scientist - René-Antoine Ferchault de Réaumur (1683 - 1757) - invented the liquid thermometer.

The definition for Réaumur:

   0 degrees Réaumur is the freezing point of water
   80 degrees Réaumur is the boiling point of water

The definition is nearly the same as the definition of Celsius, but because of the decimal system, it is the Celsius definition for temperature, which is in use nearly all over the world.