There may exist certain conditions of the mother in which nursing her own infant would be inadvisable or even impossible. Syphilis contracted late in the pregnancy, and tuberculosis, are contraindications, owing to the danger of the mother infecting the child. Inversion of the nipples, their excoriation, or persistent sensitiveness may make it impossible. In marked general debility of the mother from any cause whatever, it would be injurious to the mother and the child. After the mother and the new-born infant have had some hours of rest and sleep, it is advisable to apply the child to the breast, to receive by this first effort the small quantity of milk which is an especial provision to act as a natural purge and to start the bowels of the child into a healthy activity; this also excites the milk glands to secretion. The mother's milk in full supply may be expected in from forty to sixty hours after delivery. Nursing.-- When the mother's nipples are of the normal size and well formed, the healthy infant instinctively suckles at once when placed at the breast, but sometimes it has to be taught; by squeezing out a few drops of milk to wet the nipple, the child will usually take hold, or a little sugar and water may be put on the nipple; a little patience and tact are all that is necessary to insure success. But the infant must be taught to nurse at once before the breasts become engorged with milk. Under ordinary circumstances the child is to be kept at the breast for one year. But if within this time the menstrual period should recur and be profuse, or should the woman again become pregnant, the quality of the milk becomes poor, and necessitates the immediate weaning of the child; the character of the milk is also altered, and even its secretion may be checked. Nervous agitation may so alter the quality of the milk as to make it poisonous. A fretful temper, fits of anger, grief, and sudden terror not only lessen the quantity of the milk, but render it thin and unhealthful, inducing disturbances of the child's bowels, diarrhea, and so forth. Position of the Mother When Nursing.-- When in bed in the recumbent position, the mother should lie on that side from which the infant is going to nurse; when up, the mother should sit erect. Care of the Nipples.-- Immediately after each nursing the nipples should be washed off in a saturated solution of boric acid in cold water, and dried with a soft cloth. If they are disposed to crack, anoint them with cocoa-butter immediately after each cleansing. If the skin of the nipple is very sensitive, a nipple-shield should be used for the first few days; or should the nipple become sore at any time, the shield can be resorted to. The nipple-shield must fit tightly; the best ones are made of glass with a rubber tip. In the intervals of nursing the nipple-shield should be kept in cold water after it has been thoroughly cleansed by being brushed on both sides.