208 OHIO EXPERIMENT STATION: BULLETIN 194. 



EXPLANATION OF PLATE IV. 



Fig. 1. Hard maple sprayed during- the early spring- with kerosene 

 emulsion containing- 40$. kerosene. The tree was severely ir- 

 juiecl. 



Fig. 2, Hard maple sprayed with kerosene emulsion containing- 2\)Jo 

 kerosene. Uninjured. 



