GROWTH BY THE STEM. 



35 



In another case, by making four deep and wide in- 

 cisions into the trunk of a tree {fig. 6.), and removing 



6 



the centre, the upper part of the trunk was placed 



may be assumed that the removal of any ring of bark, so broad that 

 the wound cannot be healed over in a single season, 'will cause the 

 death of the tree. — During the deep snows of winter, in the northern 

 States, young apple-orchards are often destroyed by field-mice, which 

 girdle the trees near the ground, and they perish in the course of the 

 ensuing season. The trees may however be preserved, by taking a 

 suitable circle or section of bark, in the spring, from the limb of 

 another apple-tree, and adapting it carefully to the wounded bark, 

 the edges of which are to be pared to an even line, and the whole 

 bound up and covered with grafting clay. It is not absolutely ne- 

 cessary that the bark introduced should encompass the whole trunk ; 

 as the union by a single portion will preserve the life of the tree, 

 and the remainder of the wound will gradually become covered with 

 new bark. A. J. D.] 



