THERMOMETERS

Table Showing the Comparison of the Readings of Thermometers.

CELSIUS,ORCENTIGRADE (C). RÉAUMUR (R). FAHRENHEIT (F).
C.R.F.
−30−24.0−22.0
−25−20.0−13.0
−20−16.0− 4.0
−15−12.0+ 5.0
−10− 8.0 14.0
− 5− 4.0 23.0
− 4− 3.2 24.8
− 3− 2.4 26.6
− 2− 1.6 28.4
− 1− 0.8 30.2
Freezing point of water.
  0  0.0 32.0
  1  0.8 33.8
  2  1.6 35.6
  3  2.4 37.4
  4  3.2 39.2
  5  4.0 41.0
  6  4.8 42.8
  7  5.6 44.6
  8  6.4 46.4
  9  7.2 48.2
 10  8.0 50.0
 11  8.8 51.8
 12  9.6 53.6
 13 10.4 55.4
 14 11.2 57.2
 15 12.0 59.0
 16 12.8 60.8
 17 13.6 62.6
 18 14.4 64.4
 19 15.2 66.2
 20 16.0 68.0
 21 16.8 69.8
 22 17.6 71.6
 23 18.4 73.4
 24 19.2 75.2
 25 20.0 77.0
 26 20.8 78.8
 27 21.6 80.6
 28 22.4 82.4
 29 23.2 84.2
 30 24.0 86.0
 31 24.8 87.8
 32 25.6 89.6
 33 26.4 91.4
 34 27.2 93.2
 35 28.0 95.0
 36 28.8 96.8
 37 29.6 98.6
 38 30.4100.4
 39 31.2102.2
 40 32.0104.0
 41 32.8105.8
 42 33.6107.6
 43 34.4109.4
 44 35.2111.2
 45 36.0113.0
 50 40.0122.0
 55 44.0131.0
 60 48.0140.0
 65 52.0149.0
 70 56.0158.0
 75 60.0167.0
 80 64.0176.0
 85 68.0185.0
 90 72.0194.0
 95 76.0203.0
100 80.0212.0
Boiling point of water.

Readings on one scale can be changed into another by the following formulas, in which t° indicates degrees of temperature:

Réau. to Fahr.

9/4 t° R + 32° = t° F

Réau. to Cent.

5/4 t° R = t° C

Cent. to Fahr.

9/5 t° C + 32° = t° F

Cent. to Réau.

4/5 t° C = t° R

Fahr. to Cent.

5/9 (t° F − 32°) = t° C

Fahr. to Réau.

4/9 (t° F − 32°) = t° R