124 PRINCIPLES OF AMEKICAN FORESTRY. 



The preparation for this should consist in digging a hole 

 of sufficient sirie to take in the roots without crowding. 

 If the subsoil is very solid clay, it should be thoroughly 

 loosened up, and where practicable, it is a good plan to 

 dig a trench to the loose soil over a water pipe or sewer, 

 for by this means the roots get into loose soil, and drain- 

 age is secure, which is often much needed on such land. 



Fig. 36. — ^An overgrown wound where branch has been cut off, 

 but decay started before wound had healed over and is Uable 

 to continue farther. (After Hartig.) 



Sometimes a very stiff har dpan can be broken up to ad- 

 vantage by exploding a small dynamite cartridge in a 

 deep hole made with a crowbar. 



Before Setting the tree it should have all ^oken and 

 dead roots cut off. It should then be set an indi_or_two 

 deeper than it had been growing, the discoloration above 

 the roots indicating the depth at which it had stood. 

 If. however, good drainage cannot be secured, the tree 



