208 OKIO EXPERIMENT STATION: BULLETIN 194. 



EXPLANATION OF PLATE IV. 



Fig. 1. Hard maple sprayed during' tlie early spring with kerosene 

 emulsion containing 40% kerosene. The tree was severely i"- 

 juied . 



Fig. 2, Hard maple sprayed with kerosene emulsion containing 2\jfe 

 kerosene, Uninjured. 



