Note (13) — CANTO SECOND.

If we may judge from the opinions of the most able physicians and surgeons, it is evident that the digestion of our food depends greatly on the quantity of saliva which is elicited from the glands and mingled with it, and to its being properly masticated by the teeth, before it descends into the stomach. From this view we are led to consider the teeth as essential instruments in preparing our food. The front teeth are intended to take hold of and divide the food, and those placed back in the jaws to grind or comminute it, in which state only it is fit to pass into the stomach.

Digestion, then, is performed first by the action of the teeth, during which process the saliva is elicited from the glands in order to be mixed with it, and, as it is comminuted, descends into the stomach along with this powerful solvent, for its assimilation. It is there mixed with the gastric juice, and receives the other changes which convert it into nutritive matter.

If the teeth, then, are incapable of performing their office, the process of digestion must be imperfectly carried on, and the health of the individual suffer in proportion. The supply of nourishment to the system is the first and great function of life; and the health of the teeth, so essential to it, cannot claim too much attention from every individual.