Times of eating, 188. Quantity to be eaten, 218. Bad effects of eating too much, 222. Are mixtures of food hurtful?, 226. Food of children, 204, 232. Food of the poor too scanty, 247. Errors of over-feeding and underfeeding children, 234, 249, 259, 273. Proper food of man, 251. Different kinds of food suitable in different climates, 143; for different constitutions, 252; and at different ages, 255. Sensations after eating furnish a valuable guide, 280. Food of invalids, 286. French meals, 210. See _Meals_. _Eating._ Gall-bladder, 174. Gall-stones, 175. Game, 286. Gastric juice, 61, 87. Secreted only when there is food in the stomach, 93. Its chemical composition, 96. Acts only upon dead inorganic substances, 97. Its power of coagulating milk and albumen, 100, 116. Its antiseptic quality, 100, 117. Adapted in different animals to the nature of the food, 101. Modified in the same individual according to the wants of the system, 104. On which of its elements does its solvent power depend?, 112. The amount secreted always in proportion to the quantity of aliment required by the body, 105, 220. Its secretion retarded by disagreeable mental emotions and feverishness, 106, 322. Indispensable to digestion, 112. Thoroughly mixed with the food in the stomach, 124. Adaptation of food to its qualities in different individuals, 141. Quantity secreted at each meal, 289. Time occupied by its secretion, 295. Gizzard of granivorous birds, 50, 71. Grief enfeebles digestion, 126, 297. Growth, periods of, require an increased supply of food in vegetables, 8; and animals, 9, 22, 221. Diet during, 315. Gullet, 55. Head, Sir Francis, quoted on the quantities of cold water drunk at the brunnens of Nassau, 196; and on the prejudicial effects of intemperate eating, 222. Heidler, case quoted from, 229. Herbivorous animals have large organs of digestion, 68, 140, 145. Their gastric juice, 102. The digestion of their food partly effected in the intestines, 180. Hippocrates, his theory of digestion, 109. Horse, should not have diet suddenly changed, 103. Digestion of the, 181. Is not fed immediately before or after a journey, 293. May sometimes drink a little though perspiring, 313. Hufeland quoted on the beneficial influence of laughter in aiding digestion, 127.