Proteid requirement, fuel value of food in experiments on, athletes, 188 fuel value of food in experiments on, professional men, 178, 180, 185 fuel value of food in experiments on, soldiers, 198 in dogs, experiments of Jägerroos, 236 in dogs, experiments of Munk, 232 in dogs, experiments of Rosenheim, 234 in dogs, experiments of author, 243 in man, 169, 170, 171, 172, 174–202 nitrogen excretion in experiments on, athletes, 186, 187, 188 nitrogen excretion in experiments on, in dogs, 245, 249, 250, 251, 252, 255 nitrogen excretion in experiments on, professional men, 177, 180, 185 nitrogen excretion in experiments on, soldiers, 197, 200, 201 relation to body-weight, 184, 188, 198, 227 sample diets in experiments on, 178, 182, 189, 195 Proteids, as tissue formers, 58 of wheat kernel, cleavage products of, 259 Proteoses, 26, 67, 69 absorption of, 41 cleavage by erepsin, 34 effects when injected into blood, 41 primary, 67, 69 secondary, 67, 69 Protoplasm, 51 Protoproteose, 67, 69 Ptyalin, 20 Purin bases, 71, 72 relation to uric acid, 73 Putrefaction, in intestine, 37 products of, 38 R Rats, effects of exclusive proteid diet on, 239 effects of rice on, 240 influence of meat diet on progeny of, 240 Renal activity, and diet, 297 and inorganic salts, 298, 299, 300 Rennin, in gastric juice, 26 Resistance of body to poisons, relation to low proteid diet, 226 Respiration calorimeter, 102 Respiratory foods, 58 Respiratory quotient, 107 influence of foods on, 107, 126 influence of metabolic change on, 108 of foodstuffs, 107 relation to work, 125 value of, in determination of substances oxidized, 125 Rest, carbon dioxide output during, 111 influence of, on oxygen consumption, 126 influence of, on respiratory quotient, 126 Rice, influence of, on growth in rats, 240 Rosenheim, Theodor, on proteid requirement in the dog, 234 S Safety of low proteid standards, 231 Saliva, adaptation of, 18, 19 function of, 20 psychical secretion of, 18 secretion of, 17, 18 Salivary digestion, in stomach, 23 products of, 21 Salts, _see_ Inorganic salts Saponification of fats, 36 Sarcosin, 74 Schnyder, 115 Scientific research and typhoid fever, 267 Seasons of the year, relation to diet, 296 Secretin, 32 Secretion, of gastric juice, 24 of pancreatic juice, 31, 32 of saliva, 17, 18 Sivén, on proteid requirement, 89 Skatol, 38 Sleep, heat production during, 104, 105 Soaps, 36 Sodium carbonate, in pancreatic juice, 32