If the child seems hungry the quantity of food may be increased; but if the child will not readily take any more in quantity the strength may be increased by the use of the next higher formula. One should, however, be extremely careful under these circumstances not to coax or force a child; for this plan is almost certain to cause disturbance of digestion and actual loss in weight. A better policy is that of looking after the other factors in the child's life,--the care, sleep, fresh air, etc., for with these rather than with the food the trouble often lies. _What should be done with infants who in spite of all variations in the milk continue to have symptoms of indigestion and do not thrive?_ Except inmates of institutions who form a class by themselves, most infants who receive proper care thrive upon milk if the proportions suited to the digestion are given. Still there are some who do not. The nutrition of such is always a matter of difficulty. If a wet-nurse is available the employment of one is the thing most likely to succeed, particularly if the infant is under four or five months old. If the infant is older, or if a wet-nurse cannot be obtained, some of the substitutes for fresh cow's milk may be tried. One of the best is condensed milk, Borden's Eagle brand, canned, being preferred. This is more likely to agree if the symptoms are chiefly intestinal (colic, flatulence, curds in the stools, constipation or diarrhoea) than if they are chiefly gastric (vomiting, regurgitation, etc.). _How should condensed milk be used?_ For an infant three or four months old with symptoms of indigestion, it should at first be diluted with 16 parts of boiled water, or, sometimes preferably, with barley-water. With improvement in the symptoms the dilution may be made 1 to 14, 1 to 12, 1 to 10, and 1 to 8, these changes being gradually made. The intervals between feedings and the quantities for one feeding are given on page 108. _How long should condensed milk be continued?_ In most cases it should be used as the sole food for a few weeks only. Afterward, one feeding a day of a weak formula of modified milk (e.g., No. III or IV of the Second Series, page 71) may be given; later two feedings, and thus gradually the number of milk feedings is increased until the child is taking only modified milk. Condensed milk is not to be recommended as a permanent food where good fresh cow's milk can be obtained. _What are the objections to its use?_ It is very low in fat and proteids, and high in sugar. This accounts for its easy digestibility, and also explains why children reared upon it often gain very rapidly in weight, yet have as a rule but little resistance. They are very prone to develop rickets and sometimes scurvy. _Are the proprietary infant foods open to the same objections as condensed milk?_ They are. What has been said of condensed milk applies equally well to most of those that are sold in the market as substitutes for milk.