We do not in any way advise the use of condensed milk. Fresh milk should always be used where it is obtainable, but in traveling it sometimes has to be used. Holt says, "It should be diluted twelve times for an infant under one month and six to ten times for those who are older." Malted milk is a preparation suitable in some cases where fresh cow's milk is not obtainable. Even better than condensed milk, this food will be found serviceable in traveling, or in instances where only very bad cow's milk is within reach. SPECIAL FOODS Most patent foods are made up of starches and various kinds of sugars, and some of them have dried milk or dried egg albumin added. Many flours under fanciful names are sold on the market today. For instance, one flour with a very fanciful name is simply the old fashioned "flour ball" that our great, great grandmothers made; and, by the way, perhaps there is no flour for which we are more grateful in the preparation of infant food than the flour ball which is prepared as follows: A pound of flour is tied tightly in a cheesecloth and is put into a kettle of boiling water which continues to boil for five or six hours, at the end of which time the cheesecloth is removed and the hard ball, possibly the size of an orange, is placed on a pie pan and allowed slowly to dry out in a low temperatured oven. At the end of two or three hours, the ball, having sufficiently dried, has formed itself into a thick outer peel which is removed, while the heart which is very hard and thoroughly dry, is now grated on a clean grater, and this flour has perhaps helped more specialists to serve more sick babies than any other form of starch known. It is used just as any other flour is used--wet up into a paste, made into a gruel, which is boiled for twenty minutes before it is added to the milk. Whey is sometimes used in the preparation of sick babies' food and is prepared as follows: To a pint of fresh lukewarm cow's milk are added two teaspoons of essence of pepsin, liquid rennet or a junket tablet. It is stirred for a moment, then allowed to stand until firmly coagulated, which is then broken up and the whey strained off through a muslin. The heavy proteins remain in the curd, and the protein that goes through with the whey is chiefly the lactalbumin. CHAPTER XIX THE FEEDING PROBLEM