Lipolysis, by pancreatic juice, 36 Liver, function of, as regulator of carbohydrate, 45 glycogen in, 46 synthesis of proteid by, 48 Luxus consumption, of proteid, 59 Lüthje, 101 Lymphatics, absorption of food products by, 44 Lysin, 34, 68, 70, 259 M Maltose, 21, 37 behavior when introduced into blood, 39 Man, conservation of energy in, 103 energy produced by, 106 experiments on oxygen consumption in, 126 fasting experiments on, 80, 84 food of, 2 metabolism of energy in, 103 minimum proteid requirement in, 170, 171, 172, 174–208 work experiments on, 110–116 Mastication, importance of, 23 Meat, influence on growth in rats, 239 Metabolic changes as influencing respiratory quotient, 108 Metabolism, 51 and old age, 296 endogenous, 145 exogenous, 145 Folin’s theory of proteid, 144 influence of proteid on, 83 influence of carbohydrates on proteid, 92, 94, 95, 96, 97 influence of fat on proteid, 92, 93, 96, 97 influence of proteid on proteid, 88 of energy in man, 103 of fat during fasting, 84, 86 oxidation in, 60 of proteid during fasting, 83, 86 Pflüger’s theory of proteid, 138 processes of, 51 significance of exogenous and endogenous proteid, 49 significance of proteid, 131 Voit’s theory of proteid, 134 Methyl glycocoll, _see_ Sarcosin Methyl guanidin, 74 Milk sugar, assimilation limit of, 47 behavior when introduced into blood, 39 utilization of, 40 Mineral matter, _see_ Inorganic salts Minimum proteid requirement, 59 Mixed diet, philosophy of a, 92, 276 Monotony of diet, influence of, 242 Morphotic proteid, 134 Munk, Immanuel, on proteid requirement in the dog, 232 Muscular movements of stomach, 27–30 N Needs of body for food, 169 Nephritis, in relation to diet, 297 Neumann, R. O., on low proteid diet, 286 Nitrogen, distribution of, in the urine in relation to diet, 144 needs by body, 4 utilization of, in dogs on low proteid diet, 262 Nitrogen excretion, as influenced by proteid, 59, 87, 90 during fasting, 80, 84 during work in fasting, 125 during excessive work, 114, 127 during hard work on proteid diet, 123, 124 in experiments on proteid requirement, in dogs, 245, 249, 250, 251, 252, 255 in experiments on true proteid requirement, athletes, 187, 188 in experiments on true proteid requirement, professional men, 176, 177, 181, 185 in experiments on true proteid requirement, soldiers, 199, 200, 201 relation to work, 122, 123, 124 Nitrogen equilibrium, on low proteid diet, 176, 177, 181, 188, 200, 201, 249, 250, 251, 252, 255 Nitrogen requirement, in dogs, 234–236, 245–255 in man, 180, 184, 185, 187, 198, 227 relation to body-weight, 184, 248 Nitrogenous equilibrium, 78