Concerning baby’s right to be fed on the food that nature supplies, or if that fails on the very nearest substitute that can be discovered, there are to-day so many who urge that an infant shall be fed by its own mother, that it is perhaps needless to repeat arguments so impressive. Nevertheless, perhaps it is as well to remind young mothers of two or three of the most vital facts. The first is that no artificial substitute, however perfectly prepared and chemically analysed, can possibly give those very subtle constituents which are found in the mother’s own milk and which vary from individual to individual. These probably are in the nature of the vitamines now so well known in fresh food, but they are something more specifically individual than can be scientifically detected. The fresh milk of its own mother has a peculiar value to the child which is greater than that of any foster mother. For this reason alone, were it the only one, every young mother should nurse her own baby if possible; but, on the other hand, to-day it not infrequently happens that the mother may have an apparent flow of milk, quite sufficient for the infant in quantity, but that milk may be devoid of the necessary supply of fat or sugars or some other ingredient for complete nutriment. When this is so, it is often wisest to allow the mother to nurse the child partly and to supplement its diet by other milk. Various schools of doctors and maternity nurses have differed even on this matter, but it is quite obvious that if the actual food value of the mother’s milk is below a certain point then the added value of its individual vitamine-like qualities will not wholly compensate for the loss of actual nourishment. Among baby’s rights, I should perhaps also make it clear that there is his right that he should not be used as a bulwark between his mother and another baby in a way which is sometimes recommended so that a mother may go on nursing her infant for a very long time, sometimes even into its second year, in the hope that this nursing may prevent her conceiving again. Such a course of action is very harmful both to the child and to her and should never be followed. Such a practice is, of course, much less common in this country (except among aliens) than it is abroad where I have seen healthy children of even three or four years of age nursing upon their mother’s knees.