PLANTING AND CARE OF TREES 



125 



and manufacturing plants may be found in various stages of 

 decreptitude. The only remedies for this trouble are the passing 

 of city ordinances that aim to regulate the smoke nuisance and 

 the avoiding of species like the Elm^ the Sugar Maple^ and others, 

 that are especially susceptible to gas poisoning. 



Injuries From Overhead Wires — The construction and opera- 

 tion of overhead telephone and electric lines is responsible for 



Fig-. 51. A row of trees that liave been butchered by electrie linemen. 



much serious injun^ to shade trees. The careless chopping out of 

 branches to admit of the free passage of wires may be seen almost 



