*Models.*—The use of prepared models of the different bodily organs is strongly urged. These may be so used in elementary courses as to obviate much of the dissections upon lower animals. Although the actual tissues cannot be so well portrayed, the general form and construction of organs are much better shown. Models well adapted to class or laboratory work are easily obtained through supply houses. Illustrations of several of these are shown in connection with the "Practical Work." INDEX Abdomen; dissection of, 169. Abdominal cavity, 7, 138, 152. Absorption, 173-186. Defined, 18, 173. Accommodation, 379. To illustrate, 391. Acid reactions, 171. Acquired reflexes, 314. Adipose tissue, 5, 178. Afferent neurons, 296. Air, 76. Changes it undergoes in lungs, 101. Complemental, 89, 103. Reserve, 89, 103. Residual, 89, 103. Tidal, 88, 103. Air passages, 80. Albuminoids, 119. Purpose served by, 121. Alcohol, A cause of crime, 333. Effects on circulation, 55, 56. Effects on digestion, 167. Effects on energy supply, 195. Effects on respiratory organs, 98. Effects on social environment, 413. Effect on temperature regulation, 271. Effects on waste elimination, 212. General considerations, 412-415. Alimentary canal, coats of, 138. Alimentary muscles, work of, 159. Alkaline reactions, 171. Alveoli, 82. Amylopsin, 155, 156. Anatomy, defined, 1. Animal heat, 192. Anopheles, 401. Antiseptic ointment, 275. Antitoxin, 405. Appetite, natural, 163. Aqueous humor, 377. Arachnoid, 299. Arteries, 47. Bronchial, 84. Functions of, 51. Pulmonary, 84. Renal, 202. To illustrate elasticity of, 62. Why elastic, 48. Articulations, 230-232. Kinds of, 230. Assimilation, 18, 182. Astigmatism, 384. Atlas, 223. Atoms, defined, 105. Attraction sphere, 15. Auditory canal, 358. Auricles, 42. Axis, 223. Axis cylinder, 284. Axon, 283. Form and length of, 284. Function of, 306. Structure of, 284. Bacteria, 394. Ball-and-socket joint, 231. Basement membrane, 197. Basilar membrane, 363. Bathing, 272, 274. Biceps muscle, action of, 263. Bicuspids, 143. Bile, 154, 155. Binocular vision, 381. Blind spot, 377. To prove presence of, 390. Blood, 24-39. Changes in, 34. Checking flow from wounds, 58. Coagulation of, 31. Experiments with, 37-39. Flow of, how regulated, 50. Functions of, 33. Hygiene of, 34-36. Physical properties of, 24. Quantity of, 33. Supply to lungs, 82. Velocity of, 54. Where found, 24. Blood platelets, 25. Blood pressure, 52, 70. Blood pressure and velocity, 52. Blood vessels, to strengthen, 57. Body, organization of, 19. Bone groups, 223-229. Bones, 216-242. Adaptation of, 228. Composition, 217. Gross structure of, 218. Minute structure of, 219. Observation on gross structure, 241. Properties of, 217. Table of, 229. To show composition of, 241. To show minute structure of, 242. Bowels, rules for care of, 166.