| Nitric acid | 2 parts |
| Muriatic acid | 1 part |
Dissolve grain gold in the aqua regia so as to make a saturated solution. Take a basin and fill it 3 parts full of water; drop the solution of gold into it till it becomes an amber color. Into this solution of gold gradually drop the solution of tin, until the precipitate is complete. Wash the precipitate until the water becomes tasteless, then dry slowly and flux as follows:
Flux No. I.—
| Borax | 3 parts |
| Red lead | 3 parts |
| Flint | 2 parts |
Run down.
Rose Mixture.—
| Purple of Cassius | 1 ounce |
| Flux No. 1 | 6 ounces |
| Prepared silver | 3 dwts. |
| Flint glass | 2 ounces |
Grind.
Purple Mixture.—
| Purple of Cassius | 1 ounce |
| Flux No. 8 (see page [307]) | 2 1/2 ounces |
| Flint glass | 2 ounces |