428 



INDEX 



Winter wheat, 275. 



Wire worm, 195. 



Wolf, 399. 



Wood, structure of, 343, 344*, 345. 



Woolly aphis, 213, 221. 



Worm, 188. 



Wound, disinfection of, 254. 

 Wriggler (larva), 206. 

 Wrigglers, 205, 207*. 

 Wyoming, 146, 163, 164, 275. 



Yellowstone, 163. 



