EFFECTS OF GAS, ELECTRICITY, ETC. 

 ON TREES. 



G. E. STONK. 



INFLUENCE OF ILLUMINATING GAS. 



Undoubtedly a larger number of trees suffer from the effects of 

 escaping illuminating gas in the soil than formerly. The increased 



Fig. 17. The .same civity iJioperly lilled with reinforced 

 cement. 



death rate from this cause may be accounted for by the fact that gas 

 is now more extensivt-ly used, and the larger pipes and different 

 types of connections now in use, together with the modifications in 

 the methods of laying and calking the joints are no doubt responsi- 



