416 



HOW CROPS GROW. 



Vegetable parchment, .... 44 



Vegetable tissue, 246 



Vegetative organs 243 



Vernin, 118 



Vicin, 120 



Vitality of roots, 282 



Vitality of seeds 335 



Vitellin, 96 



"Water, 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 



"Water-oven, 88 



Water-culture, 181 



Water-glass, 135 



Water Boots, 273 



Wax, 83 



Wood, 41,305 



Wood cells 293 



Wood cells of conifers, . . . .301 



Woody stems, 305 



Woody tissue, 255 



Xylin, 61 



Xylose, 62 



Yeast 103 



Zanthophyl, 125 



Zein, 93 



Zinc M<t 



