Entered as Second Class Matter June 9, 1900, at the Post-Office at Chicago, Illinois, under act of March 3rd, 1879 
Published Monthly by R. J. Haight, 324 Dearborn St., Chicago. 
Vol. XX. No. 8. 
OCTOBER, 1910 
„ , . . ($1.00 PerYear 
Subscription - Foreign, S1.26 
(Canada, $1.25 
SHOWING THR CONTRAST BETWEEN SPRAY'ED AND UNSPRAY'ED ELMS ATTACKED BY THE ELM 
LEAP BEETLE THE TREE ON THE LEFT WAS SPRAYED WITH ARSENATE OF LEAD. THE TREE 
TO THE RIGHT, ABOFT 25 FT, .AWAY, WAS NOT SPRAYED. (See page 373.) 
