TRANSPLA^'TIXG FOREST-TREES. 193 



office of a leader, by which the growth of the season is pre- 

 served, at the expeuse of the comeliness of the tree. The 

 snbsequeut yearly accretions of wood will be in a direction 

 tending to bring the trunk into symmetrical form, but perfect 

 symmetry will never be reached. The formation of wood 

 may proceed quite as rapidly after as before the injury, but 

 the value of the timber will be lessened, especially if, as 

 sometimes happens, similar injuries follow in succeeding 

 years. 



These insects are more plentiful and destructive on warm, 

 sandy soils than on low and colder ones. In wet swamps 

 they are seldom found, and, consequently, trees growing in 

 such places are more symmetrical and taller than those of the 

 same diameter growing upon uplands. In selecting a loca- 

 tion for a pine forest, low land should be preferred, for this, 

 and probably for other reasons. 



Alden S. Bkadfokd, Siij)en'isor. 



25 



