COMPARATIVE THERMOMETERS
| Réaumur | Centi- grade | Fahren- heit | |
|---|---|---|---|
| 80 | 100 | 212 | Water boils at sea-level |
| 76 | 95 | 203 | |
| 72 | 90 | 194 | |
| 68 | 85 | 185 | |
| 63.1 | 78.9 | 174 | Alcohol boils |
| 60 | 75 | 167 | |
| 56 | 70 | 158 | |
| 52 | 65 | 149 | White of egg coagulates |
| 48 | 60 | 140 | |
| 44 | 55 | 131 | |
| 42.2 | 52.8 | 127 | |
| 40 | 50 | 122 | |
| 36 | 45 | 113 | Tallow melts |
| 33.8 | 42.2 | 108 | |
| 32 | 40 | 104 | |
| 29.3 | 36.7 | 98 | Blood heat |
| 28 | 35 | 95 | |
| 25.8 | 32.2 | 90 | |
| 24 | 30 | 86 | |
| 21.3 | 26.7 | 80 | |
| 20 | 25 | 77 | |
| 16 | 20 | 68 | Temperate |
| 12.4 | 15.3 | 60 | |
| 10.2 | 12.8 | 55 | |
| 8 | 10 | 50 | |
| 5.8 | 7.2 | 45 | |
| 4 | 5 | 41 | |
| 1.3 | 1.7 | 35 | |
| 0 | 0 | 32 | Water freezes |
| 0.9 | - 1.1 | 30 | |
| 4 | - 9 | 23 | |
| 5.3 | - 6.7 | 20 | |
| 8 | -10 | 14 | |
| 9.8 | -12.2 | 10 | |
| 12 | -15 | 5 | |
| 14.2 | -17.8 | 0 | Zero Fahr. |
| 16 | -20 | - 4 | |
| 20 | -25 | -13 | |
| 24 | -30 | -22 | |
| 28 | -35 | -31 | |
| 32 | -40 | -40 | Mercury freezes |
To change from centigrade to Fahrenheit multiply by 9, divide by 5, and add 32. To change from Réaumur to Fahrenheit, multiply by 9, divide by 4, and add 32.
(Courtesy The World Almanac)