~Malnutrition~ is not confined to the children of the poor, though it is more common with infants of parents who have not the means to secure the best milk and give them the benefit of wholesome surroundings and plenty of sunshine. But babies of people in moderate circumstances, and even of wealthy parentage, are at times badly nourished, and require the same exacting care, the same attention to the food, the fresh air, and the sunshine that the poorer babies need in order to survive. Malnutrition may be the result of insufficient food, and it may also be due to the lack of one definite food element. Again, it may be brought on by some deformity of the mouth or stomach, which make it impossible for the baby to get all the food which he requires for his maintenance and growth. He may be born prematurely and his digestive apparatus not be sufficiently developed to care for the amount or type of food necessary for his needs, or he may have some congenital weakness which interferes with the absorption and assimilation of his food. All of these points must be considered. ~Evidences of Correct Feeding.~--If the baby shows a steady gain, both in weight and growth of stature, without digestional disturbances, the food given him is probably correct, but it must be kept in mind that nutritional disturbances, such as rickets and scurvy, are slow in developing, and do not manifest themselves with anything like the rapidity of digestional disturbances. Hence the nurse must take care as far as she is able, not only to prevent the food from causing indigestion, but also to see that it is not given in such a form as to induce those graver and more lasting nutritional disturbances which affect the entire system from infancy throughout the life of the individual. SUMMARY ~Breast Feeding versus Artificial Feeding.~--There is no doubt about the fact that the breast-fed baby suffers less from digestional disturbances and has more resistance to disease than the baby fed even upon a perfectly prepared artificial food. The majority of diseases manifested by artificially fed infants have their origin in the following errors in diet. ~Over-Feeding.~--Resulting in acute gastro-intestinal disturbances (colic, enterocolitis, colitis, constipation). ~Under-Feeding.~--Resulting in chronic, and acute deficiency diseases (scurvy, rickets, malnutrition). ~Evidences of Dietetic Errors.~--The stools, showing characteristic evidences of excessive quantities of, protein, fat, or carbohydrates in the formula. Loss of weight or failure to gain. The development of deficiency diseases (scurvy, rickets, xerophthalmia, rickets and malnutrition). ~Evidences of Correctness in Feeding.~--Normal gain, freedom from gastro-intestinal disturbances, and deficiency diseases. Rosy cheeks, bright eyes, and a vigorous body.