To Remove Rust From Nickel.
Compound For Cleaning Brass.
To Clean Gilt Objects.
II.—Boil common alum in soft, pure water, and immerse the article in the solution, or rub the spot with it, and dry with sawdust.
III.—For cleaning picture frames, {204} moldings, and, in fact, all kinds of gilded work, the best medium is liquor potassæ, diluted with about 5 volumes of water. Dilute alcohol is also excellent. Methylated wood spirit, if the odor is not objectionable, answers admirably.
To Scale Cast Iron.
Cleaning Funnels And Measures.
To Clean Aluminum.
II.—Wash the aluminum with coal-oil, gasoline or benzine, then put it in a concentrated solution of caustic potash, and after washing it with plenty of water, dip it in the bath composed of 2/3 nitric acid and 1/3 water. Next, subject it to a bath of concentrated nitric acid, and finally to a mixture of rum and olive oil. To render aluminum capable of being worked like pure copper, 2/3 of oil of turpentine and 1/3 stearic acid are used. For polishing by hand, take a solution of 30 parts of borax and 1,000 parts of water, to which a few drops of spirits of ammonia have been added.