2. I have stated before (§ II. d.) that some difference prevailed in the specific gravity of the several specimens of the water which were examined. A similar want of uniformity was observed in regard to the quantity of solid ingredients, as will appear from the following statement :[1]
grains | |||||
The | 1st | specimen yielded | 86. | In the pint of sixteen ounces. | |
2d | 92. | ||||
3d | 63.6 | ||||
4th | 80.4 | ||||
5th | 82.8 | ||||
6th | 77.2 | ||||
7th | 84. [2] | ||||
8th | 78. | ||||
───── | |||||
644 |
These eight results therefore give 80,5 grs. dried at 180°, as the average quantity of solid ingredients in each pint of the water.
In the first of these trials, a whole pint was evaporated; but in the
- ↑ subsequent ones, the quantity of water was diminished to eight, six, and sometimes only four ounces, all of which, for the sake of uniformity, I have reduced in the table to the common standard of the pint.
- ↑ This specimen I brought myself from the spring; the others were sent me in sealed bottles from the Isle of Wight.