STREET TREES. 



33 





Fig. 14. Trees on curb, A, must compete with electric wires. Those 



inside walk, B, have head-room. Note fine row, C, protected 



from street by sidewalk. 



3. If lighting wires must be run with a line of trees con- 

 sider whether they shall be carried on high poles over the 

 trees, on crossarms projecting into the street, or through the 

 bodies of the trees. The chief objection to the first plan, 

 next to its unsightliness, is that the growth of the trees will 

 almost surely bring the upper shoots into contact with the 

 wires and thereby cause them to be broken and wiring 

 the tree crowns distorted. At the same time J5jimd 0r 

 the wires will be disturbed, and the current per- <** 

 haps grounded. This is rarely a good plan. Carrying wires 

 on projecting crossarms is objectionable because it interferes 

 with the freedom of the roadway, and looks badly. The de- 

 vice should be resorted to only in exceptional cases. As a 

 rule it will be found most practical and most WirlnR 

 satisfactory to carry wires through the bodies through 

 of trees and quite low down. They must be 

 insulated, of course, but when that is done properly the trees 

 will not be injured and the wires themselves will be less dis- 

 turbed by the normal tree movements. Trolley feed wires 



3 



