536 



INDEX. 



Van't Hoff, chemistry in space, 94, 

 105. 



Variability in nature, 431. 



Variation, continuous, 482; discon- 

 tinuous, 432 ; definite, 433, 438 ; 

 fortuitous, 433 ; indefinite, 438. 



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



Variations, nature of organic, 430 ; 

 origin of, 433. 



Vauquelin, 98. 



V^jdovsky, 387. 



Venetz, 260. 



Vernon, 894. 



Vertebral theory of skull, 335. 



Verworn, 297, 314, 315 ; behaviour of 

 Protozoa, 458 ; on cellular phy- 

 siology. 313 ; Neuron theory, 

 306, 309; on Johannes Mttller, 

 286 ; quoted, 315, 452 ; proto- 

 plasm, 318. 



Vestigial organs, 342. 



Virchow, 812, 359, 362 ; quoted, 313 ; 

 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, 251. 



Volkmann, 300. 



Volta, 158. 



Volvox, 300. 



Von Baer, 369, 876 ; quoted, 355. 



Von Mohl, 332, 338, 356, 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, 807. 

 Wallich, 278. 

 Ward, on correlation of mind and 



brain, 446. 



Wasmann, on animal behaviour, 468. 

 Waterston, 93, 148, 170, 208. 

 Weber, 800, 458. 

 Weber's law, 454. 

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



438, 439 ; genetic continuity, 399 ; 



Germ-Plasm (1893), 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, 396. 



White, Gilbert, on earthworms, 269. 



Whitman, on protoplasm, 362. 



Willfarth, on bacteroids, 124. 



Williamson, 119 ; on etheriflcation, 

 103. 



Willis, 304. 



Wilson, E. B., quoted, 355, 859, 370, 

 889, 398 ; cell-theory, 311 ; experi- 

 mental embryology, 884 ; proto- 

 plasm, 817, 858 ; 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, 105. 



Wohler, 98, 800 ; radicals, 102 ; syn- 

 thesis of urea, 99. 



Wolf, 205. 



Wolff, 396. 



Wollaston, 105. 212. 



Words of animals, 42. 



Wroblewski, 95, 96. 



Wundt, 455; physiological psychol- 

 ogy, 451. 



Wurtz, 103, 104, 274. 



X-rays, 163. 



Y. 



Young, James, 155. 



Young, Thomas, 144, 206 ; on Light, 



151, 152. 

 Yung, 391. 



Z. 



Zach, von, 183. 

 Zacharias, 815. 

 Zinin, 99. 

 Zirkel, 272. 



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

 Zittel's history of geology and 

 palaeontology, 225. 



