ON THE SELECTION OF ALIMENTARY SUBSTANCES FAVOURABLE TO THE REDUCTION OF CORPULENCE. It is to be borne in mind, that in dividing alimentary matter into two kinds--one fitted to develop fat, and the other having an opposite tendency--my object is merely to suit the indispensable requirements of my plan of treatment. Nor is the conclusion to be drawn, that in order to diminish corpulence, an exclusive meat diet is absolutely necessary. Man is omnivorous; that is to say, he partakes of everything entering into the composition of ordinary alimentation; but, for the purposes of my system, azotized substances should constitute, though not exclusively, his principal food. Large quantities both of animal and vegetable substances compose the ordinary diet of man. According to some philosophers, man should live on flesh only; while others maintain that man is by nature a vegetable feeder. Most naturalists, however, are agreed that the human species is omnivorous; that is to say, can live both upon vegetable and animal matter. A certain proof, in my opinion, that such is the case, is to be found in the fact that man is provided with the two kinds of teeth, the one appertaining especially to carnivorous, and the other to herbivorous animals. It is remarkable that man, in his present state of civilization, does not instinctively recognize the kind of food which is beneficial or prejudicial to his well-being. Experience alone teaches him what is good or bad. With the lower animals it is otherwise; they have the power to discern that which is suitable for food. The colt and the kid know how to select, among the varied herbage, the particular grasses which are suitable to their organization. Domesticated animals, having but an insufficiency of food, do sometimes partake of noxious plants. It may be that man, in consequence of his civilization, has lost that instinct possessed by the lower animals, and in blind confidence partakes of everything which is served to him in the shape of food; and this view derives support from the fact, that savages, and people but partially civilized, refuse to eat anything they are unacquainted with, no matter how temptingly it may be prepared. The uneducated peasantry of France, at this day, will not taste food to which they are unaccustomed, or if they do, it is only with great mistrust. It is matter of daily experience, that man can simultaneously feed upon both vegetable and animal matter, and can also live when restricted to one of these alone; such restriction, however, being better borne under the varied conditions of age, season and climate. From these considerations it follows that, for the accomplishment of a given purpose, man has the privilege of selecting certain alimentary substances, and of refusing many others; the health of the individual, who may thus submit to the diet of his choice, being in no wise affected thereby.