INDKX. 



5J>7 



Van Hasselt, ii. 242 

 Van Helmont, ii. 13 

 Vane of feather, i. 508 

 Variety of forms, i. 10 

 Variety, law of, i. 40 

 Vascular plexus, ii. 338 

 Vascularity of bone, i. 331 

 Vauquelin, ii. 202 

 Vegetable kingdom, i. 12, 33 

 Vegetable organization, i, 55 

 Vegetable nutrition, ii. 13 

 Velella, i. 178 

 Velocity of birds, i. 523 

 Velocity of salmon, i. 386 

 Velocity of sound, ii. 372, 373 

 Velvet coat of antler, i. 451 

 Vena cava, ii. 209 

 Vena portse, ii. 314 

 Venous sinus, ii. 245 

 Ventricles of brain, ii. 499 

 Ventricles of heart, ii. 238 

 Veretillum, ii. 73, 427 

 Vertebra, i. 346 

 Vertebrata, i. 322, 347 

 Vertebrae offish, i. 370 

 Verticillated arrangement, i. 78 

 Vesicles of plants, i. 56 

 Vessels, i. 90; ii. 10 

 Vessels, annular, i. Q5 

 Vessels, beaded, i. 63 

 Vessels, moniliform, i. 63 

 Vessels, proper, ii. 43 

 Vessels, spiral, i. 64 

 Vestibule of the ear, ii. 381 

 Vestibular tube, ii. 385 

 Vibrations, nervous, ii. 506 

 Vibrio, i. 53 

 Villi, secreting, ii. 311 

 Viper, ii. 536 

 Vision, ii. 398, 419 

 Vision, erect, ii. 463 

 Visual perceptions, ii. 462 

 Vital functions, i. 32 ; ii. 6, 62 

 Vital organs, ii. 318 

 Vitality, i. 35 

 Vitreous humour, ii. 413 

 Vitreous shells, i. 212 

 Vitrine auditive, ii. 383 

 Viviparous animals, ii. 537 



Voice, ii. 397 



Voltaic battery of torpedo, ii. 



513 

 Voluntary motion, i. 31 ; ii. 475 

 Voluta, i. 222; ii. 113, 431 

 Volvocina, ii. 427 

 Volvox, i. 169, 170 

 Voracity of hydra, ii. 68 

 Vorticella, i. 'l65, 169; ii. 84, 



523 

 Vulture, ii. 363 



Wading birds, i. 516 

 Walking, i. 436, 479 

 Waller, ii. 120 

 Walrus, i. 423; ii. 126 

 Warfare, animal, i. 39 ; ii. 60 

 Warm-blooded circulation, ii. 



251 

 Wasserbar, i. 52 

 Water-rat, ii. 171 

 Waterton, ii. 365 

 Water not the food of plants, 



ii. 14, 15 

 Water-beetle. See Dytiscus 

 Water-boatman. See Notonecta 

 Weber, ii. 384, 393, 395, 429 

 Whale, i. 328, 423, 427, 428 ; 



ii. 122, 123, 20 1, 259, 396, 



450, 502 

 Whalebone, ii. 123 

 Wheatstone, ii. 388, 389 

 Wheel animalcule, i. 52 

 Wheel spokes, spectrum of, ii. 



466 



Whelk. See Buccinum 

 Whiskers, i. 108 ; ii. 351 

 Whorls of plants, i. 78 

 Whorls of shells, i. 217 

 Wild-boar, ii. 144 

 Willow, spongiole of, i. 69 

 Wings, i. 308 

 Winged insects, i. 268 

 Withers, i. 458 

 Wo If- fish, ii. 179 

 Wolff, ii. 645, 548 

 Wollaston, i. 80; ii. 50, 439, 

 512 



