364 



INDEX 



Vegetable crops, fertilizing con- 

 stituents of, 115 



yields of, 114 

 Veins, 312 

 Villi, 332 

 Virgin dip, 91 



soils become acid, 246 

 Viscoid, 69 

 Viscose, 69 

 Vivianite, 171 

 Volatile oils, classification of, 81 



definition of, 79 



methods of extraction of, 80 



properties of, 80 



W 



Waste water in soil, 181 



Water, absorption of, by seed, 19 

 amount of, in seeds, 18 

 determination of, in plants, 108 

 function of, in plant, 41 

 for germination, 18 

 passage of, into plant, 29 

 in soil, composition of, 179 

 soluble arsenic, 284 (footnote) 

 vapor in air, 132 

 withdrawal of, from roots, 30 



Wavellite, 172 



Waxes, 78 



Weende method for analyzing 

 foods, 107 



Weight of air, 131 



Well-rotted manure, 263 



Wheat seed, discussion of compo- 

 sition of, 117 



Whey, 349 



White alkali, 192 

 corpuscles, 314 



Wood ashes, 236 

 gum, 71 



Wool waste as a fertilizer, 219 



Xanthoproteic reaction, 96 

 Xylan, 71 

 Xylose, 71 



Yellow dip, 91 

 Yields of crops, 113 



Zein, 95 



