The very first ought never to be utilized at this duration, inasmuch as the power of food digestion in infants is very weak, and their food is developed by nature to be taken very gradually into the stomach, being acquired from the bust by the act of sucking, in which act a fantastic quantity of saliva is discharged, and being poured into the mouth, blends with the milk, as well as is swallowed with it. This process of nature, after that, should be replicated as much as feasible; and food (for this objective) ought to be imbibed by suction from a nursing-bottle: it is hence gotten gradually, and the suction utilized protects the mixture of a due amount of spit, which has a very important influence on digestion.