As a rule the appetite is a reliable guide not only as to how much to eat, but also as to the choice of food, for without exception what is good for the mother is good also for the child. Generally the diet should be a mixed one, consisting of milk, gruels, soups, vegetables, bread, and meat. In order that monotony may not dull the appetite, no one article of food should be employed continuously. With this exception food should be selected with regard only for its wholesomeness and digestibility. All food is milk-making food; no sharp distinctions between the various kinds can be recognized. Milk, because it contains all the elements necessary for perfect nutrition, is particularly wholesome. Water also, since it forms such a large proportion of their milk, should be taken freely by nursing mothers. Generally it proves advantageous to take milk or some other nutritious drink between meals and again before retiring at night, but the danger of ruining in this way the appetite for solid food must not be overlooked. It ought to be unnecessary to say that a nursing mother should deny herself any article of food, no matter how much she may want it, if she knows it will disagree with her; but she must remember also that the same article of food will not necessarily disagree with other mothers. Generalizations of this kind are largely responsible for the wrongful tendency to reject from the dietary many altogether harmless articles. There would be little left for a nursing mother to eat if she avoided every article of food which one person or another assures her will damage her milk. No belief regarding what a nursing mother should eat is held more widely, I suppose, than that she should abstain from salads, tomatoes, and fruits which contain acid. This view is erroneous. The very idea upon which it is based is incorrect, since acids are neutralized as soon as they pass from the stomach to the intestines and cannot enter the milk. With certain persons some varieties of fruit invariably cause indigestion. Lactation does not correct such an individual peculiarity, and a nursing mother who knows she possesses it will act accordingly. Occasionally those who have no such idiosyncrasy worry after they have eaten something which contains an acid because they have heard it will do harm. In such cases it is the mental state of the woman which disturbs her milk and upsets the baby. With the exception of those who have such an idiosyncrasy and those inclined to worry, nursing mothers may partake of fruits and salads with impunity.