Nutrition, economic, experiments upon problem of, ix, x, 48-52; active interest now taken in, x; the financial saving the least of the profits in, xi; the key to England’s welfare, xxv; attitude of the scientific mind towards, xxvii; little accurate knowledge concerning, xxx; psychology of, 6-7; appetite the most important factor in, 6; mechanical and chemical physiology of, 8; its entire principle simple and practical, 19; does not advise avoiding starchy foods for stout people, 21; assures that the same food will add or decrease weight, 21; keeps one in perfect condition, 22; its requirements not hardships but pleasures, 22; not a joke or fad, 24; an appeal to self-examination and self-instruction, 24, 25; first scientific recognition of principles of, 26; medical science not possessed of final information concerning questions of, 52; plan for institution of an international inquiry into the subject of, 53-55; proposed to found an international laboratory of research for the study of, 55-68; no question of greater importance, 72; poverty and vice traced to perversion of, 73; great need of thorough physiological study of, 74; effect of the mental state upon, 74 Nutrition, animal, 56, 57, 58 Nutritive equilibrium, 37; experiments in, 37-39 Nuts, 141, 173; usefulness of, 397 Nuttall, Dr. George H. F., 26, 39, 47 O Œsophagus, the, may protect the stomach, 139, 192, 285, 286, 289, 291, 292, 297, 299, 300, 303, 304, 307, 316, 325, 326, 336, 341 Openchowski, experiments of, 305, 325 Orang, the, 115 Oranges, 169 O’Reilly, Surgeon-General, xvii, 69, 70 Ozawa, Professor, 55 P Pabulum, the, derivation of, 40, 41 Pacific Islands, the, 124 Padua, Italy, 28 Palate, the, “the dietetic conscience,” 75 Pancreas, the, excited by the vagus and the sympathetic nerves, 183, 270; special relations of acids to, 270, 271, 273, 274, 279 Pancreatic digestion, 395 —— gland, the, 269, 270, 271, 280 —— juice, the, experiments for, 267, 270, 273, 279, 360, 395 Paris, 56, 65 Pastry, 132, 172 Patagonians, the, 128 Pathology, 249 Pavia, University of, 26 Pawlow, Dr. Prof. J. P., 6, 7, 12; researches of, 61, 67, 68; his demonstrations of psychic influence in digestion, 180-283 Peas, 132 _Pendelbewegung_, the, 342 Pendulum movement, the, 358-360 Penegal, xxxiii Peptic digestion, 318, 335 Peristalsis, 327, 330, 333, 337, 340, 343, 344, 346, 348, 355-357, 361, 365, 377, 378, 383, 384, 386, 388 Peristaltic wave, the, 343, 353, 365 Pflüger’s Archives, 182 Pharynx, the, 285, 286, 290, 298 Philippines, the, 69 Physicians, most of them called on to restore appetite, 254; their indifference to appetite, 257; in Russia, 260; should bear in mind the question of psychic secretion, 261 Physiology, applied, 251