No. 1.
| Nitrate silver | 1 drachm. |
| Water | 1 dram. |
No. 2.
| Chloride of calcium | 64 grains. |
| Alcohol | 2 oz. |
No. 3.
| Citric acid | 64 grains. |
| Alcohol | 2 oz. |
To 2 oz. plain collodion add of
| No. 1 | 30 drops. |
| No. 2 | 1 dram. |
| No. 3 | ½ dram. |
By the use of this emulsion most beautiful pictures may be made on paper and upon porcelain, opal, stoneware, and other plain white surfaces.