(See also Plasters.)

Liquid Court Plaster

I

If soluble guncotton is dissolved in acetone in the proportion of about 1 part, by weight, of the former to 35 or 40 parts, by volume, of the latter, and half a part each of castor oil and glycerine be added, a colorless, elastic, and flexible film will form on the skin wherever it is applied. Unlike ordinary collodion it will not be likely to dry and peel off. If tinted very slightly with alkanet and saffron it can be made to assume the color of the skin so that when applied it is scarcely observable. A mixture of warm solution of sodium silicate and casein, about 9 parts of the former to 1 part of the latter, gelatinizes and forms a sort of liquid court plaster.

II

In order to make liquid court plaster flexible, collodion, U. S. P., is the best liquid that can possibly be recommended. It may be made by weighing successively into a tarred bottle:

Collodion.......... 4 av. ounces

Canada turpentine. . 95 grains

Castor oil.......... 57 grains

Before applying, the skin should be perfectly dry; each application or layer should be permitted to harden. Three or four coats are usually sufficient.

III

Procure an ounce bottle and fill it three-fourths full of flexible collodion, and fill up with ether. Apply to cuts, bruises, etc., and it protects them and will not wash off. If the ether evaporates, leaving it too thick for use, have more ether put in to liquefy it. It is a good thing to have in the house and in the tool chest.