Photographs by Henry R. Francis. 



TREES ALOXG CITY STREETS WHICH HAVE BEEN SEVERELY INJURED. 

 The illustration at the left shows the result of the work of decaying agen- 

 cies that have gained entrance to the interior of the tree through a wound 

 in the trunk. An attempt has been made to repair this injury by filling 

 the cavity with concrete, but the filling has nearly all crumbled away and 

 the tree is in worse shape than before the filling was inserted. The better 

 method is to protect the trunks of trees from injury by supplying an ade- 

 quate tree guard in the beginning. The illustration on the right shows an 

 American Elm that has been killed by injuries which it has received at the 

 base. Under many circumstances it is possible to provide protection for 

 the roots by the use of an iron grating. 



