At no time should an infant remain in the bed with its mother after it has finished nursing; at night this rule must be rigidly enforced, for mothers have been known to fall asleep and smother the baby, an accident known as over-lying. Infants can frequently be trained to go without feeding in the middle of the night even when a month old; and such training is always advisable, since it affords the mother opportunity for six or eight hours' continuous sleep. Before and after each nursing the mothers' nipple should be cleansed with a solution of boric acid made by placing a tablespoonful of the powder in a tumbler which is then filled with water. Such cleansing protects the breasts against infection, a complication which the nursing mother must spare no pains to prevent. Now and then, in spite of conscientious efforts to harden them, the nipples become sore. If they crack, the baby's mouth must not come in direct contact with them, since nursing with a cracked nipple is a common source of a gathered breast. Fortunately when a nipple cracks we may employ a shield, obtainable at any drug-store, which enables the infant to nurse without any danger to the mother. Most babies will take the shield as well as the breast itself; nevertheless, its use should be discontinued as soon as the nipple heals, for while the shield is used the secretion of milk is not stimulated as vigorously as when the infant nurses directly from the breast. In the rare cases in which the shield cannot be used satisfactorily the infant must be taken from the breast temporarily and given a bottle. Radical as this advice may appear, the mother must consent to follow it, for, as I have pointed out, to permit an infant to nurse a cracked nipple is extremely hazardous. When treatment is begun promptly the cracks will generally heal within twenty-four hours. HYGIENE OF THE MOTHER.--Since the mammary glands manufacture their product from the constituents of the mother's blood and their activity is controlled by her nerves, it is clear that her physical condition and her state of mind will influence the secretion of milk. Intelligent women who understand this desire to know how they should live that they may best insure an ample supply of good milk. Fortunately the first important step toward success has been taken when a mother wishes to nurse her baby; but there are also necessary wholesome food, habits conducive to health, and a mind free from worry.