Convert Delisle (°De) to Réaumur (°Ré)
Conversion:
1 Delisle (°De) = 79.466666667 Réaumur (°Ré)
How to Convert Delisle (°De) to Réaumur (°Ré)
1 de = 79.466666667 re
1 re = 148.125 de
Example: convert 15 Delisle (°De) to Réaumur (°Ré):
25 de = 66.666666667 re
Delisle (°De) to Réaumur (°Ré) Conversion Table
| Delisle (°De) | Réaumur (°Ré) |
|---|---|
| 0.01 de | 79.994666667 re |
| 0.1 de | 79.946666667 re |
| 1 de | 79.466666667 re |
| 2 de | 78.933333333 re |
| 3 de | 78.4 re |
| 5 de | 77.333333333 re |
| 10 de | 74.666666667 re |
| 20 de | 69.333333333 re |
| 50 de | 53.333333333 re |
| 100 de | 26.666666667 re |
| 1000 de | -453.33333333 re |
Delisle (°De)
Definition
Delisle (°De) is an inverted temperature scale where 0°De equals the boiling point of water and 150°De equals the freezing point. Higher values indicate colder temperatures.
History
The Delisle scale was invented in 1732 by Joseph-Nicolas Delisle, a French astronomer. It was used in Russia for nearly a century before being replaced by the Celsius and Réaumur scales.
Current use
The Delisle scale is no longer used in everyday practice. It appears in historical scientific literature and is of interest in the study of the history of thermometry and temperature measurement.
Réaumur (°Ré)
Definition
Réaumur (°Ré) is a temperature scale where 0°Ré equals the freezing point of water and 80°Ré equals the boiling point of water.
History
The Réaumur scale was proposed in 1730 by René Antoine Ferchault de Réaumur, a French scientist. It was widely used across Europe, particularly in France, Germany, and Russia, until the late 19th century.
Current use
The Réaumur scale is nearly obsolete but still occasionally referenced in European cheese-making and some Italian candy-making traditions. It also appears in historical scientific texts.