636 + XI=647 



INDEX. 



Van't Hoff, chemistry in space, 94, 

 105. 



Variability in nature, 431. 



Variations, 56, 246, 342, 406, 413. 



Variation, continuous, 432 ; discon- 

 tinuous, 432 ; definite, 433, 438 ; 

 fortuitous, 433 ; indefinite, 438. 



Variations, nature of organic, 430; 

 origin of, 433. 



Vauquelin, 98. 



VejJoosky, 387. 



Venetz, 260. 



Vernon, 394. 



Vertebral theory of skull, 835. 



Verworn, 297, 314, 315 ; behaviour of 

 Protozoa, 458 ; on cellular phy- 

 siology, 313 ; Neuron theory, 

 306, 309; on Johannes Muller, 

 286 ; quoted, 315, 452 ; proto- 

 plasm, 317. 



Vestigial organs, 342. 



Virchow, 312, 359, 362 ; quoted, 813 ; 

 genetic continuity, 370, 397 ; 

 origin of cells, 357. 



Vital force, 286, 321, 322, 326. 



Vitalism, 321. 



Vogel, 197, 218. 



Vogelsang, 273. 



Vogler, 219. 



Voit, 300. 



Volcanoes, 851. 



Volkmann, 300. 



Volta, 158. 



Volcox, 300. 



Von Baer, 369, 376 ; quoted, 355. 



Von Mohl, 332, 338, 856, 358. 



Vulpian, 452 ; on nerves, 304. 



W. 



Walcott, 350. 



Waldeyer, Neuron theory, 306. 

 Walker, S. C, on Neptune, 185. 

 Wallace, Alfred Russel, 427, 435, 



456, 492 ; on sexual selection, 437. 

 Waller, 307. 

 Wallich, 278. 

 Ward, on correlation of mind and 



brain, 447. 

 Wasmann, on animal behaviour, 468. 

 Waterston, 93, 148, 170, 208. 

 Weber, 300, 453. 

 Wchftr^s IftTir 454 

 Weismann, 400. 402, 403, 414, 415, 427. 



438, 439 ; genetic continuity, 399 ; 



Germ-Plasm (1898), 401 ; germi- 



nal selection, 434 ; non-transmis- 

 sion of acquired characters, 412 ; 

 origin of variations, 416 ; regen- 

 eration, 396. 



Weldon, 245. 



Werner, 251, 396. 



Wheatstone, 160. 



Wheeler, 390. 



White, Gilbert, on earthworms, 269. 



Whitman, on protoplasm, 362. 



Willfarth, on bacteroids, 124. 



Williamson, 119 ; on etherification, 

 103. 



Willis, 304. 



Wilson, E. B., quoted, 855, 359, 370, 

 389, 398 ; cell-theory, 811 ; experi- 

 mental embryology, 384 ; proto- 

 plasm, 317, 358 ; The Cell in De- 

 velopment and Inheritance, 401. 



Wilson, J. T., quoted, 823. 



Windle, 381. 



Winkler, 53, 73 ; discovery of germa- 

 nium, 112 ; supposed uniformity 

 of nature, 54. 



Wislicenus, 10.5. 



Wohler, 98, 300 ; radicals, 102 ; syn- 

 thesis of urea, 99. 



Wolf, 205. 



Wolff, 396. 



Wollaston, 105, 212. 



Words of animals, 42. 



Wroblevski, 95, 96. 



Wundt, 455 ; physiological psychol- 

 ogy, 451. 



Wurtz, 103, 104, 274. 



X, 



X-rays, 163. 



Young, James, 155. 

 Young, Thomas, 144, 



151, 152. 

 Yung, 391. 



Zach, von, 183. 

 Zacharias, 315. 

 Zinin, 99. 

 Zirkel, 272. 



on Light, 



Zittel,'K. A. von, quoted, 258, 851. 

 Zittel's history of geology and 



paleeontology, 225. 



7 



