INDEX 



587 



Woodchucks, 243. 

 Woolly aphis, 310. 

 Wounds, waxes for, 514. 



Xenon, 25. 

 Xyleborus pyri, 326. 



Yellows, 277. 

 Yen, 523. 



Yields of forests, 204 ; of seeds, 105 

 tables, 125, 127. 



Youatt, on gestation, 342. 

 Ytterbium, 25. 

 Yttrium, 25. 



Zebrina, 189. 



Zebu, milk of, 443. 



Zinc, 25. 



Zinc chloride to preserve fruits, 553. 



Zirconium, 25. 



Zizania, 191. 



