_What changes in the food are required by slight indisposition?_ For slight general disturbances such as dentition, colds, sore throats, etc., it is usually sufficient simply to dilute the food. If this is but for two or three feedings, it is most easily done by replacing with boiled water an ounce or two of the food removed from the bottle just before it is given; if for several days, a weaker formula should be used. _What changes should be made for a serious acute illness?_ For such attacks as those of pneumonia, bronchitis measles, etc., attended with fever, the food should be diluted and the fat reduced as described on page 95. It should be given at regular intervals, rather less frequently than in health. Water should be given freely between the feedings. Food should not be forced in the early days of an acute illness, since the loss of appetite usually means an inability to digest much food. _What immediate changes should be made in the food when the child is taken with an acute attack of gastric indigestion with repeated vomiting, fever, pain, etc.?_ All milk should be stopped at once, and only boiled water given for ten or twelve hours; afterward barley-water or whey may be tried, but no milk for at least twenty-four hours after the vomiting has ceased. When beginning with modified milk the quantity should be small and the fat low, which may be secured by the use of the Fourth Series of formulas in the place of the First or Second Series. The proportion of lime-water may be doubled. _What changes should be made for an attack of intestinal indigestion attended by looseness of the bowels?_ If this is not severe (only two or three passages daily) the fat should be lowered in the manner stated just above, and the milk should be boiled for five minutes. If curds are present in the stools, it may be still further diluted. If the diarrhoeal attack is more severe, and attended by fever and foul-smelling movements of greater frequency, all milk should be stopped immediately and the diet mentioned just above under the head of acute disturbances of the stomach should be employed. _What changes in the food should be made when the child seems to have very little appetite and yet is not ill?_ The number of feedings should be reduced, the interval being lengthened by one hour or even more. No greater mistake can be made than to offer food every hour or two to an infant who is not hungry. Such a course only prolongs and aggravates the disturbance. _What other conditions besides the food greatly Influence the child's digestion?_ Proper clothing, warm feet, regular habits, fresh air, clean bottles, and food given at the proper temperature are all quite as important as the preparation of the food; quiet peaceful surroundings and absence of excitement are also essential to good digestion. COMMON MISTAKES IN MILK MODIFICATION AND INFANT FEEDING