INDEX 



381 



Water, ground, 144 



hygroscopic, 144 



importance of, to life of cell, 101- 

 129 



intermediate factors in movement 

 of, 193-196 



loss by plant, 155-180 



osmotic, 182-184 



path of, 181-182 



rate of movement of, 193-196 



relations, 101-196 



reserve in soil, calculation of, 145- 

 146 



retaining force of soil for, 143-145 



rise in trees, 187-191 



saturation of cells, with, 101-102 



tension in vessels, 187-191 



translocation of, 181-191 



in vessels, 184-187 

 Weaver, on root systems, 132 

 Went, on growth-promoting sub- 

 stance, 287-288, 311, 320 

 Wieland, on anaerobic respiration, 



272 

 Wiesner, on light in plant growth, 40 

 Willstatter, on anthocyans, 206 



on assimilation rate, 33 



on chlorophyll, 20-21 



Willstatter, on enzymes, 210-211 



on iron in chlorophyll, 24 



on photosynthesis, 29-30 

 Wilting, coefficient, 145 



permanent, 172 



physiology of, 172-173 



temporary, 172 

 Winkler, on chimeras, 365-366 



on oxygen determination, 12 

 Winogradsky, on iron bacteria, 257 



on nitrification, 256 



on nitrogen-fixing bacteria, 57-58 



on sulphur bacteria, 70, 256 



Xanthophyll, 21 

 Xeromorphism, 178-180 

 Xerophytes, 173-177 

 sclerophylous, 176 



Y 



Yeast, 259-261, 278 



in alcoholic fermentation, 260 



ZALENSKY,.on leaf structure, 178 



on stomata, 166-167 

 Zymase, in fermentation, 262, 270 



