If the mother does not have enough milk properly to nourish her baby, one or more breast feedings can be replaced each day by a bottle. Under careful control by weekly weighing, this substitution can often be carried on very gradually, and the baby still kept on the breast for weeks and even months. One nursing after another is replaced by a bottle, the latter given as far apart as possible, until finally the mother is unable to give even two feedings a day, using both breasts each time. Nursing should then be stopped. The common custom of giving the baby the breast finally "only at night," when the baby should be asleep, is evidently objectionable. Unless it is desirable to wean the baby, the method of giving the bottle after each feeding is to be condemned. The baby quickly prefers the easy-flowing bottle to the breast, and the latter is neglected often very rapidly. Less milk is secreted, as a consequence, nursing is still more unsatisfactory, and the baby soon refuses the breast altogether. In either method a nipple should be used from which the milk comes with considerable difficulty.