INJURIES. 



17 



PREVENT A SPLIT OR 

 MtND A SPLIT BY CHAIN 

 » BOLTS, NOT BY A BAND, 



Fig. 11 The Right and Wrong of Tree Doctoring. 



If the cavity cannot be drained, if it is unsightly, or if the tree 

 needs support, a concrete filling may be placed. Before doing this 

 any but a pocket cavity should be shaped so that moisture will drain 

 from it, and set with nails or wires to hold the concrete in place. 



In many cases it is advisable simply to clean the cavity, and, 



