Bowels described, 154. Their different coats-- the peritoneal, 156; muscular, 158; and mucous, 160. Action of purgatives on the, 158, 162. Contain air, 160. Their sympathy with the skin, 161. Excretion and absorption of the, 161. Conditions essential to their perfect action, 169. Their vermicular or peristaltic motion, 158, 179, 330. Their nerves, 169. Why most open when vegetable food is used, 183, 326. Do not naturally require the aid of laxatives, 238. Their uses, 324; as an outlet of waste matter, 325. Their action bears a relation to the kind of food, 326. Causes of their inactivity considered, 330. Natural aids to their action, 159, 330. General neglect of these, 331. Bad health thence arising, 332. Their regularity important, 337. Bowel-complaint frequently produced by chill of the skin, 162, 325. Brachet, his experiments shewing that hunger is an affection of the brain, 14. Quoted on hunger, 20. Brain the seat of the sensations of hunger and thirst, 12. Should not be overtasked in childhood, 271. Influence of its state upon digestion, 296, _et seq._ Breakfast, proper time for, 193. Labour before it improper without refreshment, 193. Diseases easily caught before breakfast, 194. Reading newspapers during it improper, 52. Liquid food necessary, 307. Brigham, Dr, referred to, 271. Caldwell, Dr, quoted on intemperate eating in America, 223; on the influence of the state of the brain as a source of indigestion, 301. Carnivorous animals have small organs of digestion, 68, 140, 145. Their existence necessary, 98. Their gastric juice, 102. Carsewell, Prof., on softening and erosion of the dead stomach by the gastric juice, 99, _note_. Cassius, his leanness as described by Shakspeare, 300. Cheerfulness promotes digestion, 126, 297. Chewing, 40. See _Mastication_. Chicken, 286. Children, great importance of regulating their diet properly, 204, 232. Prevalent error of over-feeding them, 233, 273. Suffer also from deficiency of food, 249. Animal diet not to be given them too early, 264. Impropriety of tasking and confining them too much at school, 269. Dull children often become talented men, 270. Whether they ought to be allowed wine, 315. Cholera, loss of the fluid parts of the body in, 38, 162, 305. Chyle, 62. Its composition the same, from whatever food derived, 58. Chylification described, 152. This subject rather obscure, 153. Chyle converted into blood in the lungs, 167. Chyme, 62, 127. Clark, Dr, on the great importance of the proper regulation of diet in youth, 266, 267, 276. Clarke, Adam, a dunce at school, 270.