Thoroughly mix all the ingredients and pass the mixture through a fine sieve. This tooth-powder should be used only every 5 or 6 days; when too frequently used it affects the nerves.
_Opiat liquide pour les dents._--Genuine honey 1½ lbs., sugar syrup 2½ ozs., best wheat flour 7 ozs., round-lake 2 ozs., peppermint oil and clove oil each 11¼ drachms.
Convert the round-lake into a fine powder and pass it through a fine sieve into a capacious porcelain dish. Then intimately mix it with the wheat flour, gradually add the honey and syrup, and after thoroughly working the mass for about ¼ hour, add the volatile oil. Now work the whole thoroughly with the pestle, then cover the dish, and after allowing it to stand quietly for about 36 hours, bring the mass into boxes of glass or tin provided with screw-tops.
_Poudre d' Algérine._--Cream of tartar and pulverized red coral each 2 lbs., pulverized burnt alum 1 lb., pulverized sugar of milk 2 lbs., cochineal as coloring matter 3½ ozs.
The pulverized ingredients are brought into an enamelled vessel having a capacity of 12 quarts and thoroughly mixed, so that the cochineal is uniformly distributed in the mass. Now have ready about 3 quarts of nearly boiling water and a thoroughly cleansed soap-stirrer or similar instrument.
When everything is prepared, quickly pour the hot water upon the powder in the enamelled vessel and stir rapidly and thoroughly during the effervescence which immediately takes place. The effervescence gradually ceases and the result will be a beautiful crimson colored mass, the hot water having immediately and completely dissolved the coloring matter of the cochineal. Now, bring the mass into a shallow box lined with clean white paper and place it to dry in an airy room, but do not expose it to the air or sunlight. The next day the mass in the box is thoroughly worked through, this operation being repeated every day until the mass is dry. It is then again powdered, whereby it acquires a rose color, and is then sifted. The powder is perfumed with peppermint oil 1 oz. and clove oil and cassia oil each 5½ ozs., sufficient glycerin to prevent dust, being at the same time rubbed in. With the addition of the glycerin the beautiful crimson color of the powder reappears. This tooth-powder possesses excellent cleansing qualities and can be recommended chiefly to persons having yellow teeth, as well as to smokers whose teeth commence to get black.