724 



INDEX 



Diencephalon, 600, 601, 617; see also 'Tween- 



brain. 

 Diet, see Nutrition and Nutritive requirements. 



animal and vegetable, 145. 



construction of, 145. 



digestibility of, in stomach, 293. 



importance of variation in, 134. 



mixed, utilization of, 139. 



natural, of man, 146. 

 Difference tones, 501. 

 Difflugise, motility of, 45. 

 Diffusion, absorption and, 353 ; see also Osmosis. 



of odors, 486, 487. , 



relation of, to excretion, 41. 

 Digestibility of food in stomach, 293. ^ 

 Digestion, artificial, 244, 248. 



definition of, 38. 



Bacterial, in intestine, 297. 



in different divisions of alimentary canal, 

 290 seq. 



in intestine, 294 seq. 



in large intestine, 298. 



in mouth, 290. 



in stomach, 291. 



in unicellular organisms, 38. 



intracellular and extracellular, 38. 



metabolism and work of, 108. 

 Digestive enzymes, 243; see also Enzymes, 

 Digestive fluids, 242 seq.; see also under 

 individual names. 



methods of study of, 243. 



secretion of, 256 seq. 



Digestive glands, 256 seq. ; see also individual 

 glands. 



conditions for secretion in, 256. 



electric phenomena of, 48, 49, 257. 



extracts of, 243. 



fistula? of, 243. 



heat production in, 257. 



morphological changes in, 260, Fig. 100; 261, 

 Fig. 101; 262, Fig. 102; 272, Fig. 109; 

 277, Fig. 111. 



specific excitants of, 264, 271, 275. 

 Digestive products, effects of injection of, into 



blood, 250. 



Digestive system, function of, 30. 

 Dihexosamin, 249. 

 Dilator center of pupil, 529. 

 Dilator nerves of pupil, 528. 

 Diopter, definition of, 513, note. 

 Dioxy-phenyl-acetic acid, 384. 

 Dioxy-pyrimidin, 76. 

 Direct vision, 514. 

 Direction, lines of, in vision, 518. 

 Directive influences on movements of organ- 

 isms, 59, note. 



Disaccharides, properties of, 81. 

 percentage composition of, 82. 

 Discrimination time, 676. 



Discus proligerus, 695. 

 Dispersion circle, 517. 

 Dissimilation equivalent to oxidation, 27. 

 Dissimilation, necessity of, to growth, 26. 

 Dissimilation source of kinetic energy, 26. 

 Dissociation, electrolytic, 32. 

 Distances, estimation of, with eye, 554. 

 Distribution of blood in body, 239. 

 Diuresis, 390. 



Diuretic substances, 273, 389, 390. 

 Dizziness in the deaf and dumb, 481. 

 Dog, extirpation of cerebrum in, 625. 



extirpation of spinal cord in, 581, 582, 587. 

 Dorsolateral cerebellar tract, 593. 

 Double refraction of contractile protoplasm, 20. 

 Double vision, 555. 

 Dromotropic effect of vagus, 189. 

 Dry rigor, 20. 

 Dry substance, determination of, in food, 84. 



utilization of, in body, 139. 

 Dulcite, 80. 



Duodenum, influence of, on evacuation of 

 stomach, 285. 



secretion of pancreatic juice and, 270. 

 Dyspnoea, 332. 



Ear, analysis of sound in, 493, 498. 



auditory ossicles of, 495. 



beats, how explained, 501. 



cochlea of, 498. 



combination tones in, 501. 



Eustachian tube of, 497, 498. 



excitation of auditory nerve in, 498. 



external. 494. 



movements of, on stimulation of brain, 



658. 

 vasodilator nerves of, 235. 



intrinsic muscles of, 497. 



middle, 494, 495, Figs. 196, 197. 



organ of Corti in, 499, 500, Fig. 199. 



otolith sacs of, 473, 481. 



resonance theory of hearing in, 498. 

 objections to, 501. 



resonators in, 498. 



semicircular canals of, 473. 



transmission of sound in, 493. 



tympanic cavity of, 495, 497. 



tympanic membrane, 494, 495, 496. 

 Earthworm, phototaxis of, 57. 

 Echinoderms, galvanotaxis of, 60. 

 Echinoderms (Asterina), geotaxis of, 56. 

 Eck fistula, 227, 274, 371. 

 Edestin, 70, 71. 

 Egg, white of, 245. 

 Egg albumin, 74, 264. 

 Eggs, dependence of, on oxygen, 26. 



osmotic phenomena in, 34. 



thigmotactic influence of, 697. 

 Ejaculation, 693. 



