N. B.—The reason for the omissions in the last column of the preceding table is, the thermometer sinking in these mixtures to the degree mentioned in the preceding column, and never lower, whatever may be the temperature of the materials at mixing.
II.—Table, consisting of Frigorific Mixtures, having the power of generating or creating cold, without the aid of ice, sufficient for all useful and philosophical purposes, in any part of the world at any season.
Frigorific Mixtures without Ice.
| MIXTURES. | Thermometer sinks. | Deg. of cold produced. | |||
|---|---|---|---|---|---|
| Muriate of ammonia | 5 | parts | From +50° to +10° | 40 | ° |
| Nitrate of potash | 5 | ||||
| Water | 16 | ||||
| Muriate of ammonia | 5 | parts | From +50° to +4° | 46 | |
| Nitrate of potash | 5 | ||||
| Sulphate of soda | 8 | ||||
| Water | 16 | ||||
| Nitrate of ammonia | 1 | part | From +50° to +4° | 46 | |
| Water | 1 | ||||
| Nitrate of ammonia | 1 | part | From +50° to -7° | 57 | |
| Carbonate of soda | 1 | ||||
| Water | 1 | ||||
| Sulphate of soda | 3 | parts | From +50° to -3° | 53 | |
| Diluted nitric acid | 2 | ||||
| Sulphate of soda | 6 | parts | From +50° to -10° | 60 | |
| Muriate of ammonia | 4 | ||||
| Nitrate of potash | 2 | ||||
| Diluted nitric acid | 4 | ||||
| Sulphate of soda | 6 | parts | From +50° to -14° | 64 | |
| Nitrate of ammonia | 5 | ||||
| Diluted nitric acid | 4 | ||||
| Phosphate of soda | 9 | parts | From +50° to -12° | 62 | |
| Diluted nitric acid | 4 | ||||
| Phosphate of soda | 9 | parts | From +50° to -21° | 71 | |
| Nitrate of ammonia | 6 | ||||
| Diluted nitric acid | 4 | ||||
| Sulphate of soda | 8 | parts | From +50° to 0° | 50 | |
| Muriatic acid | 5 | ||||
| Sulphate of soda | 5 | parts | From +50° to +3° | 47 | |
| Diluted sulphuric acid | 4 | ||||
N. B.—If the materials are mixed at a warmer temperature than that expressed in the table, the effect will be proportionably greater; thus, if the most powerful of these mixtures be made when the air is +85°, it will sink the thermometer to +2°.
III.—Table consisting of Frigorific Mixtures selected from the foregoing Tables, and combined so as to increase or extend cold to the extremest degrees.
Combinations of Frigorific Mixtures.
N. B.—The materials in the first column are to be cooled, previously to mixing, to the temperature required, by mixtures taken from either of the preceding tables.