296 



INDEX 



ence of light on growth of roots, 96; 

 on leaf-fall, 217, 218; on protective 

 adaptations, 54 ; on resistance to 

 desiccation, 254 ; on resting periods 

 of seeds, 208. 



Wigand, 7. 



Wildemann, de, 41, 42. 



Will, 252, 255. 



Wille, 29, 67 ; on growth of walls of pollen- 

 grains, 30. 



Willows, influence of desiccation on seeds 

 of, 254. 



Winkler, 144, 147, 156, 157, 208; on vitality 

 of willow seeds, 254. 



Winogradsky, on influence of peptone, c., 

 on nitrifying bacteria, 112. 



Witch's broom, 171. 



Wittlin, 105. 



Wittmack, 21 1. 



Wittrock, 254. 



Wolkoff, on influence of light on growth, 97. 



Wollenweber, 122. 



Wollny, 70, 1 06, 120. 



Woloszczak, on vitality of willow seeds, 

 254. 



Wood, contraction of, on drying, 67 ; limit 

 of elasticity of, 56. 



Wood-cylinder, diagram of, 48. 



Wortmann, 29, 101 ; on relation between 

 growth and stretching, 30 ; on stretch- 

 ing due to turgor, 60. 



Wound-reactions, 133, 135. 



Wiillner, 244. 



Wiithrich, 260 ; on equivalent solutions, 

 273. 



Xenomorphosis, 72. 



Xylem, grand period of growth of, 13. 



Yasuda, 119. 



Yeast, accommodation of, to poisons, 262 ; 



growth of, at high pressures, 126, 127 ; 



influence of cold on, 239 ; life of, in 



absence of growth, 223. 

 Yellowstone Park, organisms in hot springs 



of, 77. 

 Young, 56. 

 Yucca, effects of inversion of, 109; strains 



in branches of, 63 ; verticibasality of, 



1 60. 



Zacharias, 33, 40. 



Zea Mays, influence of absence of oxygen 

 on resistance to heat, 228 ; tempera- 

 ture on growth of, 77; resistance of, 

 to heat, 231 ; temperature limits for 

 growth of, 76. 



Ziegler, 43 ; on cell-division in absence of 

 nucleus, 43. 



Zimmermann, 31, 40, 41, 42, 43, 45, 54, 83, 



93, i?8. 



Zinc, accumulation of, 266. 



sulphate, poisonous action of, 261. 



Zones of growth, relation between, 1 1 ; 

 length of, 12. 



Zoocecidia, 171. 



Zoospores, influence of light on formation 

 of, 91 ; limits of temperature for forma- 

 tion of, 80. 



Zopf, 84, 90, 92, 117. 



Zumstein, 112. 



ERRATA 



Page 128, note 2, for Scholz read Scholtz 

 ,, 145, note i,for Weise read Weisse 



Oxford : Printed at the Clarendon Press, by HORACE HART, M.A. 



