INDEX 



751 



Ventrolateral cerebellar tract, 593. 



Veratrin, effect of, on muscular contraction, 



437, Fig. 175. 

 Vermis of cerebellum, 607. 



function of, 609. 



Vertigo, an effect of cerebellar lesions, 608. 

 Vesical plexus, 392, Fig. 145; 393. 

 Vesicular glands, 691. 

 Vesicular noise, 322. 

 Vestibular nerve, 480, 681. 

 Vestibulo-spinal tract in cord, 593, 595. 

 Vibration frequency of tone, 489. 

 Vibration limits for organ of hearing, 490. 

 Vicia Faba, root tubercles of, 23, Fig. 18. 

 Vision, 508; see also Eye. 



binocular, 551, 552, Fig. 242; 555. 



direct and indirect, 514. 



limits of, 517, 518. 



line of, 518. 



stereoscopic, 558. 

 Visual angle, 518, Fig. 214; 556, 557. 



importance of, for perception of depth, 556. 

 Visual area for exact vision, 657. 

 Visual area of cortex, 655, 663. 

 Visual axis, 525; see also Optical axis. 

 Visual conducting pathways, 657. 

 Visual purple, 537, 541. 



Visual sensations, as effected by eye move- 

 ments, 552. 



elaboration of, 660. 



projection of, to external world, 552. 

 Visual substances, 546. 

 Vital capacity of the lungs, 320. 

 Vitalism, theory of, 2. 

 Vitellin, 75. 

 Vitellinic acid, 76. 

 Vitreous body, 508, 509. 



entoptic phenomena in, 521. 



refractive index of, 509. 

 Vocal cords, 502. 



movements of, in respiration, 312; 504, Fig. 



202. 



in vocalization, 503, Figs. 200, 201 ; 505. 

 Voice, 502. 



change of, 692. 



pitch of, determination of, 505. 



production of, 504. 



registers of, 504. 



Voit's theory of proteid metabolism, 134. 

 Volta's discovery, 47. 

 Volume, breath, 319. 



pulse, 204. 



Voluntary muscular contractions, 430. 

 Vomiting, 286. 

 Vorticella, 44, Fig. 28. 



contraction in, independent of NaCl, 25. 



motility of, 43. 



Vowels, how produced, 505, Fig. 204; 506, Fig. 

 205. 



Wagner's hammer, 421, Fig. 159. 

 Wallerian degeneration, 567. 

 Warm-blooded animals, 46, 398, 405, 406, 

 441. 



reaction of, to external temperature, 114. 

 Water, absorption of, 302. 



a constituent of living substance, 20. 



determination of, in metabolism experi- 

 ments, 85 seq. 



elimination of, through expired air, 89, 342, 



404. 



through kidneys, 89, 379. 

 through skin, 89, 397, 404. 



requirement in fasting, 95. 

 Wave lengths of visible light rays, 536. 

 Weber's theory of the pulse, 213, Fig. 85. 

 Weber's law, 456. 

 Weight, estimation of, 469, 470. 



growth in, of human body, 707 seq. 



sensation of, 471. 

 White matter of spinal cord, 562. 

 White rami communicantes, 686, 689. 

 Will, influence of, as stimulus, 570. 



power of, over pain, 466. 

 Window, oval, of ear, 496. 



round, of ear, 497. 

 Witch's milk, 704. 

 Word blindness, 663, 669. 

 Word deafness, 664. 



Work, assimilation and, 63; see also Muscular 

 work. 



external, and total energy, 113. 



of heart, 178. 

 Worker, moderate, nutritive requirements for, 



142. 



Woman's milk, 701. 



Women, nutritive requirements for, 143. 

 Wundt's tetanus, 421. 



X rays, 58. 



Xanthin, 76, 252, 413. 

 Xanthin bases, 76, 434. 

 Xantho-protei'c reaction, 72. 



Yellow as brightest light, 541. 

 Yellow-blue blindness, 547. 

 Yellow spot, 517. 

 Yolk spherules of ovum, 695. 

 Young, metabolism in the, 118. 



nutrition of the, 143. 



Young-Helmholtz' theory of color vision, 544. 

 Youth, age of, 706. 



Zona pellucida, 16, 695. 

 Zonule of Zinn, 533, Fig. 228. 

 Zymase, 40. 

 Zymogens, 38, 244. 

 activation of, 38, 252. 



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