i KOrfcO ^ 
■a. 
No. Afe 
OFFICE OF 
STATE ENTOMOLOGIST 
UNIVERSITY FARM 
ST. PAUL. - MINN. 
CiRCULAR No. 46 
JAN. 15. 1918 
® • 
( 
';:3 
THE HYDROCYANIC 
ACID GAS TREATMENT 
FOR THE 
FLOUR MOTH 
{Reprint, with additions to date, and Comments 
upon Other Methods.) 
\ 
