Whipped cream and ice cream are so familiar that they hardly need comment. Cream is such a rich food that it must be eaten in moderation. Otherwise it will cause discomfort and disease. Ice cream is made of milk and cream, in varying proportions, flavored to taste and frozen. It is not necessary to add eggs and cornstarch. If eaten slowly it is a good food, but taken in too large quantities and too rapidly it may cause digestive troubles. It is not best to chill the stomach. Those with weak digestion should be very careful not to do so. Buttermilk is sometimes flavored and frozen. This ice is easy to digest. Some doctors recommend this dish to their convalescents. It is an agreeable change, and can be eaten by many who are unable to take care of the rich ice cream. CHAPTER XIX. MENUS. For a balanced dietary we need some building food, protein; some force food, starch, sugar and fat; some of the mineral salts in organic form, best obtained from raw fruits and vegetables; and a medium in which the foods can be dissolved, water. We need a replenishment of these food stuffs at intervals, but it is not necessary to take all of them at the same meal, or even during the same day. Those who believe that all alimentary principles must enter into every meal must necessarily injure themselves through too complex eating. In talking of these alimentary principles, reference is made to them only when they are present in appreciable quantities. To have the subject better in hand, let us again classify the most important foods: Flesh foods, which are rich in protein. Nuts, which contain considerable protein and fat. Milk and cheese, which contain much protein. Eggs, taken principally for their protein. Cereals, the most important contents being starches. Tubers, containing much starch. Legumes, rich in protein and starch. Fresh fruits, well flavored and high in salt contents. Sweet fruits, containing much fruit sugar. Succulent vegetables, chiefly valuable because of salts and juices. Fats and oils, no matter what their source, are concentrated foods which furnish heat and energy when burned in the body. When people are free and active in the fresh air they can eat in a way that would soon ruin the digestive powers of those who lead more artificial lives. It is a well known fact that we can go hunting, fishing, tramping or picnicking and eat mixtures and quantities of foods that would ordinarily give us discomfort. The freedom and activity, the change and the better state of mind give greater digestive power.