45 



expensive to install, but what is called the " ring construction " sys- 

 tem may be used to advantage in many instances, particularly in the 

 suburbs. In this way it is possible to run a line through avenues of 

 fine trees in the country districts without necessitating pruning or 

 disfiguration. In cities and larger 

 towns the proper solution of this 

 problem consists in burying the 

 wires in conduits, and although this 

 is somewhat expensive it is being 

 done more and more each year. It 

 is often quite useless to start an 

 avenue of trees under a mass of 

 wires with the expectation of making 

 them thrive. In many cases permis- 

 sion has been given to install poles 

 and wires on private property, and in 

 this case it is necessary for the abut- 

 ter to give the company right of 

 way for an indefinite period of time. 



So far as trolley wires are con- 

 cerned, the conduit system is out of 

 the question in the smaller towns at 

 present on account of cost, but 

 electric lighting wires may often 

 be run over private property in the 

 rear of houses, or buried in con- 

 duits, much to the advantage of the 

 trees and streets in general. 



In cities high poles are occasion- 

 ally used, the wires being placed as 

 far above the streets as possible, 

 which prevents considerable dam- 

 age, particularly to young and mid- 

 dle aged trees. „. e,. • 



° _ rig. ?5. ishowing maple tree killed by 



On general principles it is not direct current from trolley system. 



wise to allow wires to be attached 



to trees, although this is often done. Trolley and electric light 



wires are frequently guyed to trees, but they are a source of danger, 



