1 62 PRACTICAL TREE REPAIR 



place. In that case the filling must be elastic. 

 Use asphalt briquettes and a mixture of hot as- 

 phalt and sawdust, or the mixture alone. In 

 every case a dressing of asphalt must complete the 

 filling. 



For the odds and ends of small holes, in so far 

 as they need filling, a mixture of asphalt and saw- 



Asphalt 

 Dressing __,_^^ 



''As'phalt- 

 Sawdust FiHinj 



Shallow cavity under a callus filled with asphalt- 

 sawdust mixture 



dust, or excelsior, or both, is the safest material 

 to use. For instance : It is often found that the 

 surface of a large old bark wound is decayed three 

 or four inches deep. In cleaning away the decay 

 the healthy calluses at the sides of the wound 

 may be undermined several inches. The asphalt- 

 sawdust mixture is just the thing with which to 

 fill in under the overhanging callus. A few nails 

 can be driven through it as it is cooling. 



The commonest and simplest form of large 



