First, sulphuric acid, tinted blue with indigo; second, chloroform; third, glycerine, slightly tinted with caramel; fourth, castor oil, colored with alkanet root; fifth, 40-per-cent alcohol, slightly tinted with aniline green; sixth, cod-liver oil, containing 1 per cent of oil of turpentine. The liquids are held in place by force of gravity, and alternate with fluids which are not miscible, so that the strata of layers are clearly defined and do not mingle by diffusion.
| II.— | Chromic acid | 1 drachm |
|---|---|---|
| Commercial “muriatic” acid | 2 ounces | |
| Nitric acid | 2 ounces | |
| Water, enough to make | 3 gallons |
The color is magenta.
The following makes a fine pink for show carboys:
| III.— | Cobalt oxide | 2 parts |
|---|---|---|
| Nitric acid, c. p. | 1 part | |
| Hydrochloric acid | 1 part |
Mix and dissolve, and to the solution add:
| Strongest water of ammonia | 6 parts |
| Sulphuric acid | 1 part |
| Water, distilled, q. s. to make | 400 parts |
This should be left standing in a dark, cool place for at least a month before putting in the window.
IV.—Green.—Copper sulphate, 300 parts, by weight; hydrochloric acid, 450 parts, by weight; distilled water, to 4,500 parts, by weight.
V.—Blue.—Copper sulphate, 480 parts, by weight; sulphuric acid, 60 parts, by weight; distilled water, to 450 parts, by weight.