Boiled Oil.
British Oil.—
| I.— | Oil of turpentine | 40 parts |
|---|---|---|
| Barbadoes pitch | 26 parts | |
| Oil of rosemary | 1 part | |
| Oil of origanum | 1 part | |
| II.— | Oil of turpentine | 2 parts |
| Rape oil | 20 parts | |
| Spirit of tar | 2 parts | |
| Alkanet root, quantity sufficient. | ||
Macerate the alkanet root in the rape oil until the latter is colored deep red; then strain off and add the other ingredients.
Decolorizing And Deodorizing Oils.
II.—Another method that may be applied to almost all kinds of fats and oils with excellent results is the following: Melt say 112 parts, by weight, of palm oil in a boiler. When the mass is entirely liquefied add to it a solution of calcium chloride, made by dissolving 7 parts, by weight, of lime chloride for every 84 parts, by weight, of oil in water, and mix intimately. After cooling, the mass hardens and is cut into small bits and exposed to the air for a few weeks. After this exposure the material is reassembled in a boiler of iron, jacketed on the inside with lead; a quantity of sulphuric acid diluted to 5 per cent, equal in amount to the lime chloride previously used, is added, and heat is applied until the oil melts and separates from the other substances. It is then left to cool off and solidify.
Decomposition Of Oils, Fats, Etc.
Driffield Oils.—
| Barbadoes tar | 1 ounce |
| Linseed oil | 16 ounces |
| Oil turpentine | 3 ounces |
| Oil vitriol | 1/2 ounce |
Add the oil of vitriol to the other ingredients very gradually, with constant stirring.