An excellent plan is to eat hard crusts without taking any liquid. It is impossible to swallow crusts until they are thoroughly masticated, at any rate without suffering pain in the throat. A little practice at this each day will soon inculcate the habit of eating other kinds of food in a proper manner. In the case of children, and perhaps of adults also, a good method is to insist on all food being taken with a teaspoon. This will generally be found efficacious. Whatever method is adopted, nearly all cases of dyspepsia, except those due to some disease of the stomach, can be cured by this means alone. [Sidenote: Sound teeth.] One essential, however, is the possession of good, sound teeth. And no artificial teeth that were ever made are equal to the natural ones. Every effort should be made, therefore, to keep the latter as long as possible. This can be done only by frequent brushing. People sometimes ask whether they should brush their teeth in the mornings or the evenings. There is only one answer, “Both.” We might also say, “And after each meal in addition.” It is very little trouble, for it takes but half a minute at the outside. And it is well worth doing this, if it means that the teeth can be preserved. There is nothing so good as a powder to clean the teeth, the mechanical friction removes the particles of food more efficiently than any liquid or paste can do. Of course, if the teeth are really bad they are better taken out and supplanted by artificial ones. Yet at the best these are like crutches we must have them if we cannot walk without their aid, but that is the most that can be said for them. Sound, healthy teeth are important for more reasons than that of mastication. For if they are allowed to get into a bad condition, a virulent poison is developed in their sockets, which destroys the virtues of the saliva, and also gets down into the stomach, still further hindering digestion. And its evil deeds do not end in this, for it is absorbed into the system, every part and organ of which feels the effects of its baneful influence. It is only by constant and scrupulous care that this disease, pyorrhœa by name, can be prevented in the case of those whose teeth are in an unsatisfactory condition. And if they have got to this stage of decay, it is infinitely better to have them all out. For it is not a disease which acts by fits and starts. On the other hand, it is there, like a lurking demon, working its subtle process of pollution all the time, night and day alike. And while it is better to have natural teeth than artificial ones, the latter are vastly to be preferred to a poison manufactory.