553. A safe Tooth-powder.—Cut a slice of thick bread into squares, and burn it till it becomes charcoal. Pound it, and sift it through a fine muslin. It is then ready for use.
554. Another Tooth-powder.—Mix hartshorn shavings, calcined and pulverized, three-fifths; myrrh, pulverized, two-fifths.
555. A good Dentifrice.—Dissolve two ounces of borax in three pints of boiling water; before it is quite cold, add one tea-spoonful of tincture of myrrh, and one table-spoonful of spirits of camphor. Bottle the mixture for use. Add one wine-glassful of the solution to half a pint of tepid water, and use it daily. It preserves and beautifies the teeth, arrests decay, and induces a healthy action in the gums.
556. Camphor Tooth-powder.—This excellent dentifrice is made by mixing prepared chalk, finely pulverized, and sifted through a fine muslin, with an equal quantity of pulverized camphor, prepared in the same way. It is a good preservative of the teeth.
557. Orris-root Tooth-powder.—Mix equal quantities of finely pulverized and sifted orris-root and prepared chalk. Charcoal may be used instead of chalk, in both these receipts, but it must be prepared with great care, else its grittiness will injure the enamel of the teeth.