Delisle degree, symbol °D, is a unit of measurement for temperature, named after the French astronomer Joseph-Nicolas Delisle. He had been invited by Peter the Great to Russia and built a thermometer that used mercury as a working fluid in 1732. According to Delisle scale zero was the temperature of boiling water. In 1738 it was recalibrated with zero as water freezing point and 150 °D as water boiling point. The Delisle thermometer was widely used for almost 100 years in Russia.Read more
1 °De = 2⁄3 °C = 1.2 °FList of all Delisle to other temperature units individual converters.