Delisle scale
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The Delisle scale is a temperature scale invented in 1732 by the French astronomer Joseph-Nicolas Delisle (1688–1768).[1] Delisle was the author of Mémoires pour servir à l'histoire et aux progrès de l'Astronomie, de la Géographie et de la Physique (Memories to Serve the History and Progress of Astronomy, Geography and Physics) (1738). The Delisle scale is notable as one of the few temperature scales that is inverted from the amount of thermal energy it measures; unlike most other temperature scales, higher measurements in degrees Delisle are colder, while lower measurements are warmer.[lower-alpha 1]
More information from Delisle, to Delisle ...
from Delisle | to Delisle | |
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Celsius | x °De ≘ (100 − x × 2/3) °C | x °C ≘ (100 − x) × 3/2 °De |
Fahrenheit | x °De ≘ (212 − x × 6/5) °F | x °F ≘ (212 − x) × 5/6 °De |
Kelvin | x °De ≘ (373.15 − x × 2/3) K | x K ≘ (373.15 − x) × 3/2 °De |
Rankine | x °De ≘ (671.67 − x × 6/5) °R | x °R ≘ (671.67 − x) × 5/6 °De |
For temperature intervals rather than specific temperatures, 1 °De = 2/3 °C = 1.2 °F Conversion between temperature scales |
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