Pine-apple, 141 Pitcherie, chewing, 129 Polynesia, 128 Poorer classes, the, appetite stronger among, 253; food of, 266, 267 “Popular Science Monthly, The,” xxxiii, 53; Professor Chittenden’s article in, 69-91 Pork, 100, 141 Porridge, 97, 143, 172, 270 Potato, made digestible by saliva, 20; if masticated, need not produce fat, 21; experiments with, 38, 102; yields abundant sugar by long-continued mastication, 142, 146 Potatoes, boiled, 143, 172 Poverty, traced to perversion of nutrition, 73 Proteid, demanded by the appetite, xxxii; the putrid decomposition of, 47; minimum amount of, 74, 78, 79; Asiatics consume smaller proportion of, 82, 83, 85, 98, 100, 272, 394 ——, the high, xxxii, xxxiii ——, the low, xxxi, xxxii, xxxiii —— digestion, perfect, 394, 395 —— molecule, the, isolation of the tryptophane element of, 47 Physiology, experimental, 249; can make no pretence to guide the field of medicine, 251; merely confirms the precepts of instinct, 251 Psychic environment, 12 —— excitation, 259 —— influence, in digestion, 180-283 —— juice, the, 213, 257, 267 —— secretion, 261 —— stimulation, 249 Pultaceous foods, 95, 97 Pyloric sphincter, the, movements of, 314 Pylorus, the, stands guard over the intestines, 139, 141; observations of Fallopius upon, 302; ideas of early writers concerning, 303; later experiments, 304, 307, 308, 315, 316, 317, 325, 326, 328, 330, 331, 332, 333, 340, 341, 360 R Rabbit, the, experiments upon, 344, 359, 371 Rage, effect of, 388 Raiser, experiments of, 359, 371 Rectal injections, stimulating effect on movements of small intestine of, 367 Rectum, the, 374, 379, 382 Reed, Dr. Major Walter (martyr to science), 70 Regina Margherita Laboratory, the, summit Monte Rosa, 64, 68 Regurgitation, 35 Rhinitis, 144, 148, 149 Rhythmic segmentation, of the intestinal contents, 347-355, 358, 360, 362, 383, 386 Rice, 82, 132 Rickets, 144 Rigg’s disease, 159, 163 Rjasanzew, Professor, experiments of, 275 Roberts, Sir William, 75, 147 Rockefeller, John D., xxxv —— Institute of Preventive Medicine, the, 68 _Rollbewegung_, 345 Röntgen rays, the, Dr. Cannon’s studies with, 180, 284, 287-300, 301-341, 342-388 Roosevelt, President Theodore, 70 Root, Secretary of War, Elihu, 70 Rosa, Monte, 64, 68 Rossbach, experiments of, 305, 309, 311, 313, 314 Roux, experiments of, 314, 315, 327, 328 Royal Society, the, 68 Rumination, 35, 98 Russell, Dr. William, 145 Russia, physicians in, 260; food in, 267, 272 Russian Imperial Military School of Medicine, the, 68 —— peasant, the, 270 S Sabbatani, experiments of, 378 St. Martin, Alexis, investigations on, 305, 309