INDEX 



587 



Woodchucks, 243. 

 Woolly aphis, 310. 

 Wounds, waxes for, 514. 



Xenon, 25. 

 Xyleborus pyri, 326. 



Yellows, 277. 

 Yen, 523. 



Yields of forests, 204; 

 tables, 125, 127. 



of seeds, 105 



Youatt, on gestation, 342. 

 Ytterbium, 25. 

 Yttrium, 25. 



Zebrina, 189. 



Zebu, milk of, 443. 



Zinc, 25. 



Zinc chloride to preserve fruits, 653. 



Zirconium, 25. 



Zizania, 191. 



Printed in the United States of America. 



