Introduction. General. Cow's milk: I. Nutritional value as estimated in laboratory experiments. A. Raw milk (and butter in the cases of vitamins A and D). (a) General. (6) Vitamins. (i) Vitamin A. (ii) Vitamin B complex, (iii) Vitamin C. (iv) Vitamin D. (c) Other factors, (i) Lactose. (ii) Soft-curd milk, natural and artificial, (iii) Minerals, (iv) Milk proteins. B. Treated milk, (a) Heated milk. (i) General, (ii) Vitamins, (iii) Other factors. (6) Irradiated and vitaminized milk. • C. Milk products. (a) Cheese. (i) General, (ii) Vitamins, (iii) Other factors. (6) Dried and evaporated milk. II. Nutritional value of milk for human beings. A. Raw milk, (a) General. B. Treated milk, (o) Heated milk. (i) General. (ii) Minerals. (6) Irradiated, vitaminized and mineralized milk, (c) Soft-curd milk (artificial). C. Milk products, (a) Cheese.