INDEX 



923 



VISION. 



Vision, 810 



angle of, 822 



at different distances, adaptation of eye to, 824 

 et seq. 



correction of aberration, 830 et seq. 



defects of, 828 et seq. 



distinctness, how secured, 856 et seq. 



duration of sensation in, 836 



estimation of the size and form of objects, 854- 

 856 



focal distance of, 824 



range, 827 



relation of nerve-cells arid fibres, 854 



single, with two eyes, 850 et seq. 

 Visual area, 735 



apparatus, relations of nerve-cells and fibres, 

 854 



axis, 822, 851 



impressions, 752 



judgments, 854 et seq. 



plane, 851 



purple, 817, 847 



sensations, 836, 841 et seq. 



word-centre, 741, 809 

 Visuo-psychic region, 737 

 Visuo-sensory cortex, ib. 

 Vital action, 327 



force, 2 

 Vitamine, 491 

 Vitellin, 429, 487 



membrane, 871 

 Vitello-intestinal duct, 886 

 Vitreous humour, 811, 819 

 Vocal cords, 801 



action in respiratory actions, 804 



approximation of, etfect on height of note, 805 



vibrations of, cause voice, 806 

 Voice, 799 et seq., 806 



range of, 806 

 Volt's diet, 480, 618, 629 



on " circulating protein," 622 

 Volkmann's haemadromometer, 282 



experiment on lymph hearts, 318, 319 

 Volta on galvanism, 116 

 Voluntary muscle, 63 et seq., 140 et seq. 



nerves of, 70 

 Voluntary tetanus, 104 

 Vomiting, 556, 557 



action of stomach in, ib. 



centre, ib. 



nerve actions in, ib. 



voluntary and acquired, ib. 

 Vorticellae, 82 



Vowels and consonants, 808 

 Vulpian's experiments on nerve regeneration, 

 149, 151 



w. 



Wagner's hammer, 90 



Wallerian degeneration method, 146, 149, 151, 156, 



651, 652 

 Waller, dynamograph, 132 



electrocardiogram, 245 



fatigue theory, 133 



on the electrical currents of the eyeball, 849 



on the passage of blood-corpuscles, 297, 298 



ZYMOLYSIS. 



Waller continued 



on work of heart, 247 



" sound-picture " theories of, 798 



variation in nerve action, 159 

 Wander cells, 31 

 Water-hammer pulse, 291 

 Wave of blood causing the pulse, ib. 



velocity of, ib. 

 Weber-Fechner law, 763 

 Weber's experiment on velocity of blood-flow, 281 



on heart- beats, 249 

 Weber's paradox, 112, 114 

 Weigert's method, 651, 739 

 Weismann's germ plasm, 859, 861 



somatoplasm, 861 



Wertheimer's investigations into pancreatic secre- 

 tion, 520 



Wharton's jelly, 36 

 Whey protein, 482 



White corpuscles. See Blood-corpuscles, white ; 

 and Lymph-corpuscles. 



emigration of, 298 

 White fibro-cartilage, 37, 38 



fibrous tissue, 29, 80 



spot, 814 



Widal's reaction, 476 

 Wooldridge's method of preparing tissue-fibrino- 



gen, 431 



Word- centres, 809 

 Worms, circulatory system in, 230 

 Wright, Hamilton, sleep theory, 746 

 Wright's opsonins, 476 

 Wrisberg, cartilages of, 800, 805 



pars intermedia of, 675 



Xanthine,166, 432 

 Xantho-proteic reaction, 425 



Y. 



Yawning, mechanism of, 382 



Yeast plant, cells of, in process of budding, 5, 439 



Yellow elastic fibre, 29, 30 



fibro-cartilage, 37,40 



marrow, 41 



spot of Sommering, 814 

 Yeo's experiment on gaseous exchanges in the 



heart, 254 



Yolk-sacs, 888 et seq. 

 Yolk-spherules, 870 

 Young-Helmholtz theory, 842 et seq. 



Zona fasciculata, 340 



Zona pellucida, or striata, 19, 870, 881 



Zonule of Zinn, 820 



Zuntz, on mountain sickness, 400 



Zymase, 439 



Zymogen, 441, 449, 499, 509 



Zymolysis, reversible, 614 



