INDEX TO VOLUME II. 



511 



Distance, judgments of, by means of auditory 

 sensations, 389 



perception of, 354 



visual perception of, 348 

 Disuse, effect of, on muscles, 77 

 Dizziness, 405 



Dogs, removal of cerebrum in, 267 

 Domestication, effect of, on menstruation in 



animals, 460, 462 

 Dorsal nerve-roots, efferent fibres in, 203 



roots, degeneration resulting from injury to, 

 227 



spinal nerve-roots, number of fibres of, 230 

 Dreams, 293 

 Du Bois-Reymond's key, 30 



law of stimulation, 32 



theory of currents of rest, 148 

 Ductus cochlearis, structure of, 374 



endolympliaticus, 373 



venosus of the embryo, 476 

 Duration of electric currents, effect of, on their 



irritating power, 46 

 Dynamic equilibrium, organs of, 407 

 Dyspepsia accompanying the climacteric, 490 

 Dyspnoea, effect of, on the iris, 324 



Ear, analysis of composite tones by, 384 

 anatomy of, 362 



discriminative sensibility of, for pitch, 385 

 fatigue of, 387 

 imperfections of, 388 

 membranous labyrinth of, 372 

 ossicles of, 365 



sensibility of, in perception of time intervals, 

 388 

 Earth-worms, regeneration of lost parts in, 496 

 Efferent fibres of the optic nerves, 240 

 impulses in reflexes, co-ordination of, 214 

 neurones of the dorsal spinal nerve-roots, 203 



of the spinal cord, 203 

 paths from the cortex, course of, 244 

 Ejaculation, 465 

 Ejaculatory duct, 447 

 Elasticity of muscle, 105 



Electric currents, correlation of their duration 

 witli histological structures, 47 

 effect of, on muscles, 61 

 on nerves, 62 

 the duration of, 46 

 their density, 41 

 galvanic effect of, on normal human nerves, 



51 

 influence of their direction in nerves, 48 



of varying duration of, 47 

 methods of detecting, 145 

 spread of, in moist conductors, 41 

 stimulating effect of, 28 

 organ, 145 

 Electrical changes iii I lie retina, 331 

 phenomena of muscle and aerve, 144 



of nerves, interpretation of, 158 

 st imulation of nerve, 25 

 of nerves, law of, :;■_' 



Electrodes, shielded, 1 1 



varieties of, 29 

 Electrostatic changes, stimulating action of, 42 

 Electrotonic changes of conductivity, 50 

 of irritability, til 



in human nerves, 65 

 twitch, 157 

 Electrotonus, 62 

 Embryo, nutrition of, 175 



rate of growth of. 1-7 

 Emmctropia, 313 

 Emmetropic eye. 312 



Encephala, classification of, according to 

 weigbt, 275 



Encephalon, specific gravity of, 275 



weight of, -.'7 1. ■- , 7."i 

 End-bulbs, sensory, 392 

 Endolymph, 372 



End-organs, importance of, in touch sensations, 

 396 



transmission of excitation by means of, 82 

 Energy liberated in contracting muscles, 138 

 Engelmann's theory of the nature of muscular 



contraction, 105 

 Environment, influence of, on organisms, 493 

 Epididymis, 1 17 

 Epigenesis, theory of, 500, 504 

 Epiglottis, 121 



Epinephrin, action of, on muscles, 138 

 Equilibrium of the body, definition of, 404 



relation of the cerebellum to, 273 



sense of, 404 

 Erection, 464 



spinal centre for, 464 

 Erector clitoridis muscle, 464 



penis, action of, in erection, 464 

 muscle, 449 

 Eserin, action of, on nerve and muscle, 60 

 Ether, action of, on coagulation of muscle- 

 plasma, 164 

 on conductivity of nerves, 93 



effect of, on nerve-currents, 155 



vapor, action of, on nerves, 60 

 Eustachian tube, 363 

 function of, 369 

 Excitability, changes in, during Wallerian de- 

 generation. <>!> 

 Exercise, effect of, on growth, 489 



on muscular endurance, 76 

 Exhaustion of muscles, 72 

 Explosive consonants, 437 

 Extensibility of muscle, 105 

 External auditory meatus, 362 



ear, anatomy of, 362 



rectus muscle, 299 

 Extractives, nitrogenous, of muscle, 166 

 Extrapolar region, 62 



Eye, abnormal positions of, after cerebellar 

 injury, 272 



adaptation of, to light, 326 



axes of rotation of, 299 



chromatic aberration of, 316 



constants, changes in, during accommodation, 

 311 



defects in the dioptric apparatus of, 314 



dioptric apparatus of, 300 



mechanical movements of, 298 



movements, binocular co-ordination in, 300 

 extent of. 298 



muscles of. 299 



innervation of, 300 

 optical constants of, 303 



power ill', ::n| 

 positions of, 299 

 refractive media of, 302 



surfaces of, 303 

 spherical aherral ion of, 315 



V M.i.nri w tubes, 1 13, 156 



False amnion, 173 



Falsetto register of the voice, 133 



Far-point of vision, 312 



Fatigue, cerebral amemia from, 288 



curve with repealed single contractions. 111! 



effect of. mi In i<_;lit of coui racl ion. 113 



on muscular conl raction, 130 



on rigor caloris, 165 

 morlis. Kin 

 from voluntary muscular contraction, 134 

 in nerve-fibres, 195 



of central nervous system, 289 



