840 OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE V 



TREE BUTCHEKY AND GAS INJURY 



Fig. 1. — The butchery practiced by aerial linemen in order to stop inter- 

 ference with their wires is an important source of injury to trees in cities. 

 Treeb so beheaded rarely thrive afterwards and their natural beauty is forever 

 ruined. A better scheme is to adopt the cable system either aerial or sub- 

 terranean and to run all necessary aerial lines through the alleys, where they 

 interfere but little with the trees. 



Fig. 2. — A row of trees killed by a leaking natural gas main, Akron, Ohio. 

 The first evidence of gas injury usually is a wilting of the leaves, and may or 

 may not be accompanied by discoloration. If trees in the vicinity of gas lines 

 are noticed suddenly to become sickly, an immediate examination should be 

 made and the leak if present should be stopped. As a rule, however, trees do 

 not survive if injured sufficiently for the symptoms to be indicated by the wilt- 

 ing foliage. Moreover, there is little to be done by way of counteracting gas 

 injury, about the only thing being that of digging up and aerating the soil. 



