10 
The best time to apply the arsenical is when the eggs hatch, or 
shortly afterwards, and the best methods of spraying shade trees are 
discussed in Farmers’ Bulletin No. 99. 
Approved: 
JAMES WILSON, 
Secretary of Agriculture. 
Wasuineton, D. C., December 2, 1907. 
[Cir. 97] 
O 
