Paris Salts.
| Zinc sulphate | 49 parts |
| Ammonia alum | 49 parts |
| Potash permanganate | 1 part |
| Lime | 1 part |
The ingredients are fused together, mixed with a little calcium chloride, and perfumed with thymol.
Platt’s Chlorides.—
| I.— | Aluminum sulphate | 6 ounces |
|---|---|---|
| Zinc chloride | 1 1/2 ounces | |
| Sodium chloride | 2 ounces | |
| Calcium chloride | 3 ounces | |
| Water enough to make | 2 pints. |
II.—A more elaborate formula for a preparation said to resemble the proprietary article is as follows: {265}
| Zinc, in strips | 4 ounces |
| Lead carbonate | 2 ounces |
| Chlorinated lime | 1 ounce |
| Magnesium carbonate | 1/2 ounce |
| Aluminum hydrate | 1 1/2 ounces |
| Potassium hydrate | 1/2 ounce |
| Hydrochloric acid | 16 ounces |
| Water | 16 ounces |
| Whiting, enough. |
Dissolve the zinc in the acid; then add the other salts singly in the order named, letting each dissolve before the next is added. When all are dissolved add the water to the solution, and after a couple of hours add a little whiting to neutralize any excess of acid; then filter.
Zinc chloride ranks very low among disinfectants, and the use of such solutions as these, by giving a false sense of security from disease germs, may be the means of spreading rather than of checking the spread of sickness.