INDEX. 



1045 



Electrical changes with respiratory 



movements, 698 

 Electrocardiograms, 545 

 Electrodes, non-polarizable, 100 



stimulating, 86 

 Electrolytes, effect of, on osmotic 



pressure, 1034 

 Electrotonic currents, 107 

 Electrotonus, 87 



Eleventh cranial nerve, nucleus of, 250 

 Embryo, nutrition of, 995 

 Endocrin system, 873 

 Endogenous fibers of spinal cord, 170 

 Energy of muscular contraction, 37 

 Enterokinase, 797, 799, 805 

 Entoptic phenomena, 366 

 Enzymes, adenase, 756, 857 



amylase, 802 



arginase, 856 



chemistry of, 757 



classification of, 752 



deaminizing, 754 



definition of, 752 



endoenzymes, 752 



enterokinase, 797, 805 



erepsin, 802, 806 



exoenzymes, 752 



general properties of, 754 



glycolytic, 756 



guanase, 756, 858 



historical account of, 747 



intracellular, 975 



inverting, 806 



lipase, 803 



nuclease, 756 



of muscle, 64 



oxidases, 754, 976 



pepsin, 784 



peroxidases, 976 



protective, 753 



ptyalin, 771 



rennin, 788 



reversible reactions of, 750 



specificity of, 751 



trypsin, 798 

 Epi critic sensations, 279 



sensibility, 278 

 Epigenesis,*1006 

 Epinephrin, 884, 886, 887 



increased, effect on heart-beat, 604 



physiological action of, 883 

 Erection, physiology of, 1007 

 Erepsin, 806 

 Ergograph, 48 

 Erythroblasts, 440 



Erythrocytes. See Red blood-cor- 

 puscles. 



Erythrodextrin, 772 

 Eserin, action of, on iris, 328 

 Ethereal sulphates, 862 

 Eupnea, 653 

 Eustachian tube, 391 



Evolution, hypothesis of, in heredity, 

 1010 



Exogenous fibers in spinal cord, 170 



Exophthalmic goiter, 878, 879 



Expiration. See also Respiration. 

 definition of, 649 

 expiratory center, 700 

 muscles of, 652 



Expired air, composition of, 669 

 injurious effects of, 670 



Extensibility of muscle, 20 



Extensor thrust reflex, 158 



Eye, abnormalities in refraction of. 



319 



accommodation in, 313 

 action of drugs upon, 328 

 acuity of vision in, 343 

 after-images in, 352 

 as optical instrument, 306 

 binocular field of vision, 372 



perspective, 378 

 chromatic aberration in, 319 

 color blindness of, 354 

 contrasts in, 353 

 vision in, 349 

 complementary colors, 351 

 corresponding points in, 372 

 dark adapted, 338, 346 

 diffusion circles in, 313 

 diplopia in, 370, 373 

 direct field of vision in, 342 

 entoptic phenomena in, 366 

 far point of distinct vision, 316 

 function of cones, 358 



of rods, 358 



fundamental color sensations, 351 

 horopter, 375 



indirect field of vision in, 342 

 inversion of image in, 311 

 light adapted, 338, 347 



reflex in, 326 

 movements of, 368 

 muscular insufficiency, 370 

 nature of visual stimuli, 338 

 near point of distinct vision, 316 

 nodal point of, 310 

 ophthalmoscopic examination of. 



331 

 optical defects of, 319 



delusions. 382 

 physics of formation of image in, 



309 



qualities of visual sensations, 349 

 reduced schematic (Listing), 310 

 refractive power of. 317 

 size of retinal images, 312 

 spherical aberration in, 319 

 steroscopic vision, 378 

 struggle of visual fields, 375 

 suppression of visual images, 375 

 theories of color vision, 360 

 threshold stimulus of, 345 



