I

Caoutchouc....... 10 parts

Petroleum........ 10 parts

Carbon disulphide. 10 parts

Shellac........... 40 parts

Lampblack....... 20 parts

Oil lavender...... 1 part

Alcohol.......... 200 parts

Upon the caoutchouc in a bottle pour the carbon disulphide, cork well, and let stand a few days, or until the caoutchouc has become thoroughly gelatinized or partly dissolved. Then add the petroleum, oil of lavender, and alcohol, next the shellac in fine powder, and heat it to about 120° P., taking care that as little as possible is lost by evaporation. When the substances are all dissolved and the liquid is tolerably clear, add the lamp-black, mix thoroughly, and fill at once into small bottles.

II

A waterproof blacking which will give a fine polish without rubbing, and will not injure the leather:

Beeswax........... 18 parts

Spermaceti........ 6 parts

Turpentine oil...... 66 parts

Asphalt,varnish.... 5 parts

Powdered borax. ... 1 part

Frankfort black .... 5 parts

Prussian blue...... 2 parts

Nitro-benzol....... 1 part

Melt the wax, add the powdered borax and stir till a kind of jelly has formed. In another pan melt the spermaceti, add the asphalt varnish, previously mixed with the oil of turpentine, stir well, and add to the wax. Lastly add the color previously rubbed smooth with a little of the mass. The nitro-benzol gives fragrance.