| IV.— | Stearine | 8 to 9 parts |
|---|---|---|
| Mutton suet | 32 to 38 parts | |
| Stearine oil | 2 to 2.5 parts |
Melt together and mix with Vienna chalk, in fine powder, 48 to 60 parts; Paris red, 20 parts.
| V.— | Rotten stone | 1 part |
|---|---|---|
| Iron subcarbonate | 3 parts | |
| Lard oil, a sufficient quantity. | ||
| VI.— | Iron oxide | 10 parts |
| Pumice stone | 32 parts | |
| Oleic acid, a sufficient quantity. | ||
| VII.— | Soap, cut fine | 16 parts |
| Precipitated chalk | 2 parts | |
| Jewelers’ rouge | 1 part | |
| Cream of tartar | 1 part | |
| Magnesium carbonate | 1 part | |
| Water, a sufficient quantity. | ||
Dissolve the soap in the smallest quantity of water over a water bath. Add the other ingredients to the solution while still hot, stirring all the time to make sure of complete homogeneity. Pour the mass into a box with shallow sides, and afterwards cut into cubes.
Non-explosive Liquid Metal Polish.
Miscellaneous Metal Polishes.
II.—This is recommended for machinery by the chemical laboratory of the industrial museum of Batavia:
| Oil of turpentine | 15 parts |
| Oil of stearine | 25 parts |
| Jewelers’ red | 25 parts |
| Animal charcoal, of superior quality | 45 parts |
Alcohol is added to that mixture in such a quantity as to render it almost liquid, then by means of a brush it is put on those parts that are to be polished. When the alcohol has dried, the remaining cover is rubbed with a mixture of 45 parts of animal charcoal and 25 parts jewelers’ red. The rubbed parts will become quite clean and bright.
III.—The ugly spots which frequently show themselves on nickel-plated objects may be easily removed with a mixture of 1 part sulphuric acid and 50 parts alcohol. Coat the spots with this solution, wipe off after a few seconds, rinse off thoroughly with clean water, and rub dry with sawdust.