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Table for calculating the Strength of Ether Vapor.
By John Snow, M.D.
Table of the quantity of vapour of ether in 100 cubic inches of air, saturated with it at various temperatures:-
| Temp. Fahr. | CUBIC INCHES. | WEIGHT IN GRS. | ||
| Ether. | Air | Ether. | Air. | |
| 40 | 24.3 | 75.7 | 19.1 | 23.1 |
| 42 | 25.6 | 74.4 | 20.1 | 22.7 |
| 44 | 27.0 | 73.0 | 21.2 | 22.2 |
| 46 | 28.3 | 71.7 | 22.3 | 21.8 |
| 48 | 29.7 | 70.3 | 23.4 | 21.4 |
| 50 | 31.2 | 68.8 | 24.6 | 20.9 |
| 52 | 32.7 | 67.3 | 25.8 | 20.5 |
| 54 | 34.3 | 65.7 | 27.0 | 20.0 |
| 56 | 36.0 | 64.0 | 28.3 | 19.5 |
| 58 | 37.7 | 62.3 | 29.7 | 19.0 |
| 60 | 39.5 | 60.5 | 31.1 | 18.4 |
| 62 | 41.4 | 58.6 | 32.6 | 17.8 |
| 64 | 43.3 | 56.7 | 34.1 | 17.3 |
| 66 | 45.3 | 54.7 | 35.7 | 16.6 |
| 68 | 47.4 | 52.6 | 37.3 | 16.0 |
| 70 | 49.4 | 50.6 | 38.9 | 15.4 |
| 72 | 51.5 | 48.5 | 40.6 | 14.7 |
| 74 | 53.6 | 46.4 | 42.2 | 14.1 |
| 76 | 56.0 | 44.0 | 44.1 | 13.4 |
| 78 | 58.4 | 41.6 | 46.0 | 12.6 |
| 80 | 61.0 | 39.0 | 48.1 | 12.0 |
| 82 | 63.7 | 36.3 | 50.2 | 11.0 |
| 84 | 66.6 | 33.4 | 52.5 | 10.1 |
| 86 | 69.5 | 30.5 | 54.8 | 9.3 |
| 88 | 72.5 | 27.5 | 57.1 | 8.3 |
| 90 | 75.6 | 24.4 | 59.6 | 7.4 |
[219/220] About 45° the weights of vapour of ether and of air are equal, and at a little above 70° the volumes are equal. The weights are calculated with the barometer at 30.
**From this it will be seen that the quantity of ether administered with air varies materially with the temperature.
