INDEX 



473 



UHLENHUTH on blood, 318 

 Ullman on grafting, 425 

 Ulothrix zonata, sporulation in, 



189 



Units of Spencer, 251 

 Universal donors in blood trans- 

 fusion, 324 



recipients in blood transfusion, 

 324 



VACCINATION, 392 



Vaccine treatment, 399 



Vacuoles, contractile, 73, 101 

 in cells, 101 



Van Dusch, 25 



Van Helmont, 22 



Variety, 309 



Vascular system, development | 



of, 129 

 tubules of plants, 130 



Vaucheria, reproduction in, 189 



Vegetable cells, 97 



Vena? cavse, 141 



Venus' fly-trap, 35, 36 



Vernon on sex determination, 243 



Verworn, 153 



Vesication, 60 



Virgil on spontaneous genera- 

 tion, 21 



Virulence, 364 



Viscera, regeneration of, 415 



Vision, development of, 159 



Vitalists, 81 



Vitreous body, 160 



Volvox, 120 

 globator, 117, 119 



Von Baer, 214, 234 

 on classification, 308 



Von Eiselberg on transplanta- 

 tion, 428 



Vorticella, conductivity in, 70 

 mechanical stimulation of, 45 

 nucleus of, 99 



WAGNER, 203 

 Waldeyer, 104 



Wallace and evolution, 288 

 Warm-blooded animals, effect of 



temperature on, 39 

 Wassermann and Schultze on 



blood, 318 

 Water, stimulating influence of, 



50 



vascular system, 131 

 Weismann on chromosomes, 104 

 on Spencer's theory of heredity, 



251 

 Weismann's theory of germ 



plasm, 259 



White blood-corpuscles, develop- 

 ment of, 134 

 granules of, 95 

 Wilson on sex determination, 



244 



on Weismann's theory, 266 

 Wilson (H. V.), 404 

 Wilt disease of cucumbers, 334 

 Windows of Herrick, 157 

 Wolff (Caspar Frederick), 213 

 Woodruff, 184 

 Worms, locomotor apparatus of, 



128 



vascular system of, 131 

 Wounds, healing of, 414 

 Wright and opsonins, 389 



X-ELEMENT in sex determination, 

 245 



YERKES, 172 



Yolk, 216 



Young on sex determination, 242 



Youth, 91 



ZONA pellucida, 100 

 Zooprecipitins, 317 

 Zoospore, 190 

 Zygospore, 193 

 Zygotes, 189 



