ioo PRACTICAL TREE REPAIR 



inevitable swaying and twisting. The divisions 

 between the sections are certain, sooner or later, 

 to admit water, and calluses will not grow over a 

 filling which grinds against them in a wind. For 

 such cavities as this, asphalt is now being advocated 

 as a filling, but none of the different methods of 

 using it has been tried out long enough to make 

 its value absolutely certain. No large job of this 

 kind should be undertaken unless the probability 

 of large expense, and the possibility of ultimate 

 failure are squarely recognized. 



In this connection it may be note4 that when 

 the tree surgery companies publish photographs il- 

 lustrating their largest jobs, the pictures are always 

 observed to have been taken during the progress 

 of the job or immediately upon its completion. 

 When, however, they print pictures taken several 

 years after the work is done (as in showing callus 

 growth, which is supposed to be proof of success) 

 the pictures are almost invariably of simple basal 

 fillings. 



By keeping in mind this scale, indicating roughly 

 the relative costs and risks of the different classes 

 of fillings, and also the preceding list of " don'ts " 

 relative to expensive fillings in trees, it is possible 

 for the owner of trees, or his adviser, to arrive at 

 a pretty definite conclusion as to whether to order 

 his decayed trees filled or not. 



In view of what has already been said, it is 



