In conclusion, the nutrition of man, if it is to be carried out by the individual in a manner adapted to obtaining the best results, involves an intelligent appreciation of the needs of the body under different conditions of life, and a willingness to accept and put in practice the principles that scientific research has brought to light, even though such principles stand opposed to old-time traditions and customs. The master words which promise help in the carrying out of an intelligent plan of living are moderation and simplicity; moderation in the amount of food consumed daily, simplicity in the character of the dietary, in harmony with the old saying that man _eats to live_ and not lives to eat. In so doing there is promise of health, strength, and longevity, with increased efficiency, as the reward of obedience to Nature’s laws. INDEX A Abderhalden, Emil, 35 Absorption, a physiological process, 41 diffusion as a factor in, 41 from the stomach, 31 in intestine, 37 of fats, 43, 49 of fats, in dogs on low proteid diet, 233, 261 of food products, by blood, 44 of peptones, 41 of proteid in dogs on low proteid diet, 233, 262 of proteid products, 47 of proteoses, 41 osmosis, as factor in, 41 paths of, 44 reconstruction of proteid during, 42 selective action, of sugars, 47 Acid, aspartic, 34, 67, 259 glutaminic, 34, 259 hydrochloric, 25, 26 uric, 73 uric, excretion of, as influenced by diet, 144 Acids, amino, 34 diamino, 34 Adenase, 71 Adenin, 72 Aldehydase, 64 Amino acids, 34, 67 Ammonia, 70, 259 Amylopsin, 32 Anabolism, 50 Animals, influence of low proteid diet on high proteid, 231, 233, 243 Animal starch, _see_ Glycogen Appetite, in relation to food requirements, 162 Arginin, 34, 68, 70, 259 Argutinsky, views on muscle work, 123 Aspartic acid, 34, 67, 259 Assimilation limits of sugars, 47 Athlete, photograph of, 190 Athletes, fuel value of food of, on low proteid diet, 198 strength tests of, on low proteid diet, 206 true proteid requirement of, 186 Atwater and Benedict, 109, 111 Autodigestion (_see_ Autolysis), 63 Autolysis, 12 Availability, of foods, 12 of carbohydrates, as source of energy, 45 B Bacterial flora in intestine, of carnivora, 292 of herbivora, 292 Bacterial processes in intestine, in relation to food, 292 Balance, nutritive, as affected by various factors, 117, 118 Basal energy exchange, 104 Beaumont, William, on movements of stomach, 27 Benedict, F. G., _see_ Atwater and Benedict Bergell and Lewin, 36 Beriberi, and diet, 224 Blood, absorption of food products by, 44 behavior of disaccharides when introduced into, 39 effects of injection of proteoses and peptones into, 41 relation of sugar in, to glycogen, 46 sugar in, 45