PLATE IV. 



FIG. T. — siidw illy- dee)) burning of 

 liirgf limb b\ liijili-tenslon alter- 

 njitiiii;: cunvnt wiiv. 



Fig. 8. — Showing elm tree killed by 

 direct current (reversed polarity) 

 from electric railway system. Note 

 effects of Inirning at the base of the 

 tree. 



