- Many, while attentive to their teeth, do more injury than good by two much officiousness, daily applying some dentifrice, or tooth-powder, often impure and injurious, and rubbing them so hard as not only to injure the enamel by excessive friction, but also to hurt the gums even more than by a toothpick. Tooth-powders advertised in newspapers are to be suspected, as some of them are not free from corrosive ingredients. Charcoal (which whitens the teeth very nicely), pumice-stone, cuttle-fish, and similar substances, are unfit for use in tooth-powders, as all are to a certain extent insoluble in the mouth, and are forced between the margin of the gums, forming a nucleus for a deposit. Below will be found a few good formulas for dentifrices: Three and one-half pounds of creta preparata, one pound each of powdered borax, powdered orris-root and white sugar, and two ounces cardamom seeds; flavor with wintergreen, rose or jasmine. If color is desired, use one pound of rose-pink and as much less of creta preparata. Tooth-powders should be thoroughly triturated in a wedgewood mortar and finely bolted. The following is a simple and cheap preparation, and is pretty good. Take of prepared chalk and fine old Windsor soap pulverized well in proportion of about six parts of the former to one of the latter. Soap is a very beneficial ingredient of tooth-powder.