INDEX 587 



Vagus, preparation, 558; inhibits heart-beat, etc., 559, 560, 



561. 



Vapor pressure, 15. 

 Vasodilator nerves, 575. 

 Vasomotor centre, 570 ; fibres in anterior roots, 572 ; functions 



of cord, 570 ; reflexes, 576 ; sciatic, 574. 

 Veratrine, influence on contraction, 345. 

 Vision, acuteness, 465, 466; blind spot, 499; color blindness, 



501 ; field of, 500; yellow spot, 499. 

 Volume of contracting muscle, 331. 

 Volume tube, 332. 



WOHLER'S discovery, 3. 



Work adder, 359. 



Work done, influenced by load, 358. 



