JXUKX. 



887 



VASH-DII.ATATOK NKUVKS. 



Vaso-dilatator nerves, 300, 308, 475 

 Vasp-motor nerves, 



distribution of, 298 



effect of section, 298 et *,</. 



experiments on, 306 



influence upon blood-pressure, 304 

 Vase-motor nerve-centres, 298, 661 



nervous system, 296 et geq. 



reflex action, 306 

 Vegetables as food, 455, 464, 466 

 Vegetable cells, 6 



protoplasmic movement in, 13, 14 

 Veins. 215 



cardinal, 837 



circulation in, 276 et seq. 

 velocity of, 2(14 



collateral circulation in, 2l6 



development, 836 



distribution, 215 



pressure in, 291 



rhythmical action in, 270 



structure of, 216 



umbilical, 823 



valves of, 2l6 ft srq. 

 Velocity of blood in arteries, 262 

 in capillaries, 264 

 in veins, ill. 



of circulation, id. 



of nervous force, 1 72 

 Ven:e ndvehentes, 836 



revehentes, ib. 

 V. ntilation, 381 

 Ventral cerebellar tract, 615 

 Ventricles of heart. Sec Heart. 

 Ventricular diastole, 232 



systole, ib. 

 Ventriloquism, 737 



rine, effect of, on muscular con- 

 traction, 125 

 Vermicular movement of intestines, 



536 



Vertebra", development of, 824 

 Vesical, germinal, 22, 802 

 Vesiculii- seminales, 796 

 Vestigial fold of .Marshall, 838 

 Vibrations, conveyance of to auditory 



Ilerve, 722 i't */. 



Vicrordt's haematochometer, 263 

 Villi in eliorion, function of, 822 



of intestines, 448 

 Vi-reral elett-, and arches, development 



of, 827 et tea. 



connection with cranial nerves, 830 

 Visceral mesoblast, 811 



plates, 813 

 Vision, 740 

 angle of, 757 

 at different distances, adaptation of 



eye to, 750 / -t - 

 corpora quuilri-einina. the principal 



nerve-centres of, 637 

 correction of aberration, 765 et seq. 

 of inversion of image, 787 



WOLFFIAX BODIES. 



Vision con tin m-tl. 



defects of, 763 et seq. 



distinctness, how secured, 789 et seq. 



duration of sensation in, 770 



estimation of the size and form of 

 objects, 787 9 



focal distance of, 759 



impaired by lesion of fifth nerve, 791 



single, with two eyes, 782 et seq. 

 Visual area, 6"8 



judgments, 787 et seq. 

 Visual purple, 752, 780 

 Vitellin, 462 

 Vitelline duct, 852 



membrane, 80 1 



spheres, ib. 



veins, 830 



Vitreous humour, 741. 754 

 Vocal cords, 727, 733, 734 



action in respiratory actions, 734 



approximation of, effect on height of 

 note, ib. 



vibrations of, cause voice, 734, 735 

 Voice, 727, 735 



range of, 737 



Volkmann's lucmadromometer, 263 

 Voluntary muscle, 85 et seq. 



nerves of, 93 



Voluntary tetanus, 128, 162 

 Vomiting, 525 



action of stomach in, ib. 



centre, 526 



nerve actions in, 525 



voluntary and acquired, ib. 

 Vowels and consonants, 738 



W. 



Waldeyer, stages of karyokinesis, 18 

 et sry. 



Wallerian degeneration method, 167, 

 170, 609 



Waller, apparatus for gas analysis, 



383 



on the electrical currents of the eye- 

 ball, 781 



Water hammer pulse, 2f) 



Wave of blood causing the pulse, ib. 

 velocity of, ib. 



Weber- I'echncr law, 692, 702 



Weber's paradox, 135 



Weight, influence on capacity of respi- 

 ration, 355 



Whey proteid, 458 



White corpuscles. f>er Blood-cor- 

 puscles, white ; and Lymph-cor- 

 puscles. 



White tibrp-cartilage, 55 

 fibrous tissue, 44 

 spot, 749 



Woittian bodies, 856 et seq. 

 duct, 856 



