Delisle scale

[1] The Delisle scale is notable as one of the few temperature scales that are inverted from the amount of thermal energy they measure; unlike most other temperature scales, higher measurements in degrees Delisle are colder, while lower measurements are warmer.

[a] In 1732, Delisle built a thermometer that used mercury as a working fluid.

[1] Delisle thermometers usually had 2400 or 2700 gradations, appropriate for the winter in St. Petersburg,[2] as he had been invited by Peter the Great to the city to found an observatory in 1725.

He then sent this calibrated thermometer to various scholars, including Anders Celsius.

This was reversed to its modern order after his death, in part at the instigation of Swedish botanist Carl Linnaeus and the manufacturer of Linnaeus thermometers, Daniel Ekström.