416 



HOW CROPS GROW. 



Vegetable parchment, .... 44 



Vegetable tissue, 246 



Vi'nvtative organs, 243 



Vcrniu, 118 



Vicin, 120 



Vitality of roots, 282 



Vitality of seeds, 335 



Vltellin, 96 



\\'at(>r. Composition of . ... 37 

 Water, Estimation of . . . . 39 

 Water. Formation of .... 24 

 Water in air-dry plants .... 39 

 Water In fresh plants, . ... 38 

 Water in vegetation, Free ... 39 

 Water in vegetation, Hygro- 

 scopic, . . 39 



Watrr-ovoii, 38 



Water-culture, 181 



Water-glass, 135 



Water Hoots, 273 



Wax, 83 



Wood, 41, 305 



Wood cells, 293 



Wood cells of conifers, . . . .301 



Woody stems, 305 



Woody tissue 255 



Xylin, 61 



Xylose, 62 



Feast 103 



Zanthophyl, 125 



Zein,' 93 



Zinc 21fl 



