_Dr. Hufeland's tooth soap._--Best quality of tallow melted without acid 14 lbs., soda lye of 38° B. 6½ lbs., potash lye of 20° B. 1 lb. Further, yellow ochre 1 lb., umber 4½ ozs., and precipitated carbonate of calcium 3 lbs., stirred together with hot water 2 quarts. Peppermint oil 5¼ ozs., clove oil 14 drachms.
The kettle with the tallow strained through a cloth is brought upon the water-bath and the tallow heated to 167° F. The lye heated to about 100° F. is then slowly added to the tallow in the kettle, and, after stirring for about ¼ hour, the mass is allowed to rest quietly, the kettle being lightly covered and only a little steam admitted or fire kept under the kettle, so that saponification does not take place too rapidly.
Saponification will be slowly effected from the sides of the kettle in about one hour, the mass in the kettle rising somewhat. This rising indicates that the process of saponification is going on. The mass is now again stirred, which must be done carefully and not hastily, as otherwise the soap readily becomes spumous. When the soap again lies quietly in the kettle, it will have the appearance of a white prime grain-soap. Now add the coloring substances and the precipitated carbonate of calcium and thoroughly stir, so that the mass acquires a uniform brown color. Then remove the kettle from the water-bath, add the perfumes with constant stirring, bring the finished tooth soap into the frame, lightly cover the latter with the wooden lid and let stand over night. The next day the tooth soap may be cut up into suitable pieces, which are allowed to dry for about 12 hours and then packed in tinfoil, etc.
_Tooth-soap._--Castile soap 1 lb., prepared chalk 1 oz., thymol 20 grains, oil of wintergreen 30 drops.
Shave the soap into ribbons, beat it into a paste with a little water, and add first the prepared chalk and lastly the thymol and wintergreen oil dissolved in a little water.
_Saponaceous tooth-wash._--White Castile soap 3 ozs., oil of orange peel 10 drops, oil of cinnamon 5 drops, water 4 ozs., alcohol 12 ozs.
Shave the soap into ribbons; melt with the water in a water-bath, adding the alcohol while still warm. Continue the heat if necessary, until solution is effected. When cold, dissolve the oils in the liquid.
