Prepared chalk2 lb.
Orris root2 lb.
Sugar2 lb.
Water1 lb.
Madder lake¾ to 1½ oz.
Oil of lavender150 grains.
Oil of mace150 grains.
Oil of clove150 grains.
Oil of peppermint1 oz.
Oil of rose150 grains.

The prepared chalk used in this and many other articles is pure precipitated carbonate of lime. It is made from pieces of white marble, the offal from sculptors’ workshops, which are placed in wide porcelain or glass vessels and covered with hydrochloric acid, when abundant vapors of carbonic acid are given off. When the development of carbonic acid has ceased, the liquid is allowed to stand at rest for several days with an excess of marble, whereby all the iron oxide is separated. This is necessary, otherwise the preparation would not be white, but yellowish. The liquid is filtered and treated with a solution of carbonate of soda (sal soda), in water as long as any white precipitate results. This precipitate is washed with pure water on a filter, and when slowly dried it forms a fine, brilliant white powder. Crystalline calcium chloride may also be purchased, dissolved in water, and treated with the soda solution to obtain the white precipitate. The quantity of madder lake in the above formula is given within the limits to form light or dark red tooth paste.

B. Tooth Powders.

Quinine Tooth Powder.

Prepared chalk2 lb.
Starch flour1 lb.
Orris root, powdered1 lb.
Sulphate of quinine¾ oz.
Oil of peppermint150 grains.

Cinchona Bark Tooth Powder.

Cinchona bark, powdered1 lb.
Prepared chalk2 lb.
Myrrh, powdered1 lb.
Orris root, powdered2 lb.
Cinnamon, powdered1 lb.
Carbonate of ammonia2 lb.
Oil of clove¾ oz.

Borated Tooth Powder.

Borax, powered1 lb.
Prepared chalk2 lb.
Myrrh, powdered½ lb.
Orris root, powdered½ lb.
Cinnamon, powdered½ lb.

Homœopathic Chalk Tooth Powder.