Another excuse, and one fostered to some extent by physicians, is, that certain breast-milks are “poison for the baby.” This has even less foundation in fact; and here again the fault must be looked for in the baby rather than in the mother. Outside of certain variations in the fat-content, all breast-milks are alike in composition. In proof of this Finkelstein has fed these babies at the breast of tried wet-nurses with absolutely no benefit, while the children of the wet-nurses would thrive at the breast of the “poison-milk mother.”
Abscess of both breasts may force a temporary cessation of nursing, but the breast should be regularly emptied until the inflammation has subsided; and then the nursing should be re-established. Cracked or sunken nipples may render nursing impossible, but they do not stop the flow of milk. In both these latter conditions the milk may be manually expressed or removed with the breast-pump. In this connection I wish to recommend the improved Jaschke pump, in which, by means of a releasing valve, the sucking movements of the child can be very closely imitated.
Where artificial feeding must be started early, cow’s milk is almost universally employed. Whenever possible, “certified milk” should be used; the ordinary milk, however, can be boiled with little or no harm. In diluting and preparing this milk, we have the choice of several methods. The so-called percentage feeding, favored in America, is difficult and cumbersome, and has no advantages over its simpler rivals. Pfaundler’s rule may be safely employed. It is as follows: One-tenth body-weight of milk, one one-hundredth body-weight of sugar diluted up to one liter; give 200 c.c. five times in twenty-four hours. Even simpler is the following: One-third milk for the first month, one-half for the second month, two-thirds for the third and fourth months, each with the addition of 4 to 6 per cent sugar. Either milk-sugar or ordinary granulated sugar may be employed. The malt sugars and extracts should be reserved for sick children. After the second month, oatmeal water may be used as a diluent in place of plain water.
Recently Friedenthal, a Berlin physiologist, has attempted an exact imitation of mother’s milk, including that important element, the salt, which had, until recently, been entirely neglected. Langstein is very enthusiastic over this milk as a food for healthy infants; but Finkelstein, in a personal communication, assured me that it has not as yet proved itself. Schloss, dissatisfied with the results of the Friedenthal milk, has modified it in the direction of casein milk by replacing the milk-sugar with the malt preparations, and increasing the protein content. He claims good results, and is supported by Leopold, of New York, who has used it extensively. But we must leave the final word as to both these milks for the future to decide. From the sixth to the ninth month for both breast-fed and bottle-fed babies, cooked cereals, toast, and vegetables should be gradually added to the diet. At the ninth month, unless this is one of the hot summer months, the nursling should be weaned, and a small amount of cow’s milk substituted. The weaning should be gradual by omitting one nursing period each week. The one important exception to the foregoing rules for the first year of life, is the premature infant. In the ninth month of fetal life, reserves of calcium and iron are stored up in the body, which the infant gradually uses up during the first nine months of extra-uterine life. The premature infant lacks this store, and manifests it in different ways. As early as the second or third month a breast-fed premature infant may develop a most extensive craniotabes. This is not due to a true rachitis, i.e., disturbance of calcium metabolism, but to a want of calcium in the body. Small amounts of cow’s milk, which contains much more calcium than human milk, or calcium in the form of calcium lactate or chloride, will remedy this condition. A similar process happens in the case of iron. The premature infant is born with a hemoglobin percentage of 100 to 110; by the third or fourth month this may sink to 40 per cent, and for this reason green vegetables should be added to the diet as early as the fourth month.
The diet of healthy children in the second year should include cooked cereals, vegetables, toast, cooked fruits, and meat-juices; and the quantity of cow’s milk should be limited to one and one-half pints in twenty-four hours. The question of the addition of meat to the diet is important. Some authors have recently advocated the giving of meat as early as the ninth month. During the past year, working in Finkelstein’s laboratory, I have been able to gather some facts which have a direct bearing on this question. (Zeitschrift für Kinderheilkunde, July, 1914.) By means of the new electrometric determination of absolute acidity (that is, the number of H ions), I was able to show that the acidity of the stomach before the eighteenth month of life is insufficient to permit any peptic, i. e., protein, digestion. Solomon, working in the same clinic, in a report not yet published, has shown the same thing from a clinical standpoint. He found that on a meat diet up to the end of the second year large quantities of muscle fibers passed through with the bowel-movement unchanged; but after that age they rapidly decreased in number. It is, therefore, worse than useless to add meat to the diet before the beginning of the third year.
Eggs frequently produce profound disturbances in young infants, perhaps on account of the absorption of egg albumin, unchanged, in the blood-stream; and they should be kept from the diet-list until the beginning of the fourth year.
These rules for feeding are generalized, and there may be many exceptions. Each child is to some extent a law unto itself, and this is especially true of those children with nervous or exudative diathesis.
In conclusion, I wish to make a plea for greater uniformity in our rules for infant-feeding. Even more than in strictly medical affairs has the public the right to demand information. Heretofore, every new book and every public lecture on infant-feeding has deviated markedly from its predecessors, until the confused laity, and even general practitioners, have turned in disgust to proprietary foods and formulas. Pediatrics is a new science, and as such is bound to undergo rapid changes and conflicting opinions. But that need not hinder us from agreeing on certain fundamental facts which can be given as guides to the general practitioner and to the public.
I believe that the simple rules for infant-feeding here laid down are neither too conservative nor too radical to serve as a basis of agreement upon which the medical profession may show to the public a united front on this important question. Such uniformity of opinion—and the sooner it can be reached the better—will not fail to have a beneficial effect on both the profession and the public.