—Grind together 100lbs. of dry ground slate, 25lbs. zinc white, 1 gallon of linseed oil, 2 gallons of gloss oil, and 1 gallon of japan drier.

Dipping White.

—Grind 100lbs. of zinc white with 90lbs. of Paris white in 2 gallons of linseed oil, 32 gallons of gloss oil, and 11 gallons of benzine. This makes 50 gallons of paint.

The above recipes for dipping paints have been modified from recipes which originally appeared in “Drugs, Oils and Paints,” of Philadelphia.

PAINT FOR IRON.

There has been a very considerable amount of difference of opinion as to the best paint for iron. An elaborate course of experiments were made and the results reported in the columns of the “Engineer” some time since. The results of these experiments showed that no rust whatever resulted from either of the following mixtures, which may therefore be recommended as good paints for iron.

Red Lead Paint.

—Red lead, 88 parts; raw linseed oil, 12 parts.

Cheaper Red Lead Paint.

—Cheaper red lead, 45 parts; barytes, 45 parts; raw linseed oil, 10 parts.