Drink necessary to supply the waste of the liquid portions of the body, 36. Bad effects when withheld, 37. Absorbed directly from the stomach into the system, 38, 79, 117, 140, 195. Temperature of drinks considered, 308. Water as a drink, 314. Wine and other fermented liquors, 314. Spirits hurtful, 316. Sudden changes of its temperature hurtful to the teeth, 45. See _Liquid_. _Thirst._ Dunglison’s Elements of Hygiene quoted and recommended, 305, 311. Duodenum, 62, 170. Eating ought not to be too rapid, 51, 122. Times of, 188. Eating too much, a prolific source of disease, 24, 219. Conditions to be observed before and after eating, 273. See _Food_. _Meals._ Epiglottis, 55. Excrement, 153, 178. Excretion of waste matter into the bowels, 161. Exercise renders appetite keen, 19, 21, _et seq._ Prevents costiveness, 180, 332. Improper immediately before and after meals, 288. Farinaceous food, 118, 138, 284. Fat and oily food, 281, 285. Fermentation and digestion different processes, 110. Fermented liquors, 314. Fever, loss of appetite during it a wise arrangement, 31, 107. Fish, 286. Fluids. See _Drink_. _Liquid._ _Thirst._ Follicles of the stomach, 77. Food necessary to supply waste of the substance of living beings, 5. Requisite quantity varies according to circumstances, 6, _et seq._ Warning given by hunger when food is required, 10, 11, 19, 218. Most necessary during growth, 22, 315; and when the life is active, 23, _et seq._ Error of eating too much, 24, _et seq._, 219. Thirst varies in intensity according to the kind of food, 37. Mastication, 40, insalivation, 49, and deglutition of food, 55. Its quality modifies the amount of saliva secreted, 53. The most opposite kinds of food reduced by digestion to the same substance, 58. Different stages through which food passes between its reception into the stomach and its assimilation, 61. Size of the stomach varies according to its quality, 67. Advantages of our want of consciousness of its presence in the stomach, 85. Sudden and extreme changes of diet injurious; and why, 103. Ought not to be rapidly swallowed, 51, 122. Thoroughly mixed with the gastric juice in the stomach, 124. Concentrated food, why digested with difficulty, 125, 142, 326. Ought not to be taken till previous meal is digested, 129. Comparative digestibility of different kinds of, 133. Animal food more digestible and nutritious than vegetable, 118, 138, 281, 283; and why, 141. Farinaceous food, 118, 138, 284. Soup, 117, 125, 139, 281, 312. Changes of food in the bowels, 152. Injection of food into the bowels, 164.