Objects of polished copper, bronze, brass, and other alloys of copper tarnish through water and it is sometimes necessary to give them again their bright appearance. Pickle the articles in an acid bath; wash them next in a neutral bath; dry them, and subsequently rub them with a polishing powder. Such is the general formula; the processes indicated below are but variants adapted to divers cases and recommended by disinterested experimenters:

Sharp Polishes.
I.—Quartz sand, powdered and levigated 20 parts
Paris red 30 parts
Vaseline 50 parts
Mix intimately and make a pomade.
II.—Emery flour, finest levigated 50 parts
Paris red 50 parts
Mutton suet 40 parts
Oleic acid 40 parts
III.—Levigated emery powder100 parts
Anhydrous sodium carbonate  5 parts
Tallow soap 20 parts
Water100 parts

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Copper Articles.
Bronze Articles.
Highly Oxidized Bronzes.

Polishes For Floors.

I.—Throw a handful of permanganate potash crystals into a pail of boiling water, and apply the mixture as hot as possible to the floor with a large flat brush. If the stain produced is not dark enough, apply one or two more coats as desired, leaving each wash to dry thoroughly before applying another. If it is desired to polish the surface with beeswax, a coat of size should be applied to the boards before staining, as this gives depth and richness to the color. After 3 or 4 days, polish well with a mixture of turpentine and beeswax. A few cents will cover the cost of both size and permanganate of potash.

II.—Potash1 part
Water4 parts
Yellow beeswax5 parts
Hot water, a sufficient quantity.