1132 



INDEX 



Vision, contrast, 1016 



duration of stimuli, 1009 



experiments, 1058 



pick's theory, 1010 



Holmgren's wools, 1069 



irradiation, 1021 



Listing's law, 1023 



Maxwell's spot, 1065 



measurement field vision, 1063 



ophthalmometer, 1062 



ophthalmoscope, 1065 



perimetry, 1018 



persistence theory, 1010 



Purkinje's figures, 1070 



relation of rods and cones to, 1005 



skiascopy, 1066 



stereoscopic, 999 



Talbot'slaw, 1010, 1070 



theory of identical points, 997 



Young-Helmholtz theory, 1013 

 Visual acuity, 1068 



centres, 931 



path, 894 



purple, 812, 1007 

 Vital capacity, 235, 297 

 Vitamines, 619 

 Vitreous humour, 460 

 Vivi-diffusion apparatus, 48 

 Vocal cords, 301 



in voice production, 302 

 movements of, in respiration, 



305 



paralysis of, 310 

 Voice, 301 



air-pressure necessary for, 303 



falsetto, 306 



in children, 304 



nervous mechanism of, 309 

 Voltaic current, alterations in excita- 

 bility and conductivity pro- 

 duced by, 816 

 stimulation by, 783 

 Volume pulse, 127 

 Voluntary contraction, 734 



Voluntary contraction, electrical changes 



in, 736 

 fatigue in, 727 



movements, acquisition of, 945 

 Vomiting, 328 



centre, 330 



induced by apomorphine, 329, 330 

 Vowel cavities, 308 



formation, theories of, 308 

 Vowels of timbre, 307 



Warmth, sensations of, 1041 

 Water, absorption of, 440 



in diet, 617 



production of, in the body, 608 

 Weber's law (stimuli), 1057 

 Wernicke, aphasia of, 9315 



zone of, 936 

 Wharton's duct, 385 

 Wheatstone's bridge, 699 

 Whey protein, 348 

 Word-blindness, 937 



-deafness, 933, 937 

 Wounded vessels, sealing of, 46 



Xanthin, 579, 582 



fever, 68 1 



Xantho-proteic reaction, 8 

 Xerostomia, 394 



Yawning, 282 



Yeast and vitamines, 620 



test for sugar, 518 



Yellow atrophy, acute, and excretion of 

 amino-acids, 576 



spot, 1064 

 Young-Helmholtz theory, 1013 



Zein, as a food, 604 

 Zone of Wernicke, 936 

 Zoosterins, 360 

 Zymase, 331 

 Zymogen, 350 

 granules, 370 



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