INDKX. 



Vision, astigmatism, 798 

 binocular vision, 811 

 center of, 799 

 chromatic aberration, 794 

 color vision, 807 

 complementary colors, 807 

 crystalline lens, 781 

 Daltonism, 807 

 dioptrics, 793 

 hypermetropia, 7M'i 

 irradiation, 808 

 lacrymal secretion, 814 

 lenses, 798 

 lymphatics, 799 

 movements of eyes, 812 

 myopia, 800 

 ophthalmoscope, 814 

 optic nerve, 785 

 perception of light, 792 

 perimeter, 815 

 phosphenes, 809 

 presbyopia, 796 

 retina, 782 



retinal epithelium, 785 

 rhodopsin, 785, 804 

 sensation of color, 806 

 Snellen's test-types, 803 

 spherical aberration, 794 

 transmission of light, 771 

 visual angle, 802 



apparatus (see eye), 

 structure of, 772 



purple, 785 



area, 815 



field, 818 



line, 802 



Vital capacity, 355 

 Vitellin, 40 

 Vitreous humor, 788 

 Vocal cords, 565, 568 



conditions of, 568 



false, 565 



true, 565 



Voice and speech, 569 

 height of, 569 

 organ of, 568 

 range of, 570 

 Vomiting, 87 

 causes, 88, 571 

 mechanism of, 87, 88 

 nerve center, 88 

 Von Bezold's ganglion, 251 

 Vowels and consonants, 571 



WALLERIAN degeneration, 676 

 Warm-blooded animals, 509 

 Water, 26 



daily amount, 26 



drinking, 26 



in faeces, 130 



in metabolism, 484 

 Weber's schema of circulation, 283 

 Wheat, 44 

 Whey, 42 



Widal reaction, 215 

 White columns, 617 

 White corpuscles (see blood-corpuscles), 



179 



Wine, 42 



Wing muscles of insect, 533 

 Wirsung's duct, 98 

 Word-centers, 573, 699 

 auditory, 573, 698 

 visual, 572, 698 

 Work, effect upon destruction of proteid, 



546 

 Wrisberg's cartilages, 565 



XANTHIN in urine, 450 

 Xanthoproteic test for proteids, 36 



YAWN, 377 



ZONULE of Zinn, 795 

 Zymogen, 99 

 Zymoids, 213 



