FIG. 79— CROSS SECTIONS OF WHITE PINE (2x4) SCANTLINGS SH0W1N(^, 

 BRANCHES BURIED BY TISSUE 

 Left column, readini; down: 1, living branches; 2, larger ones; 3. where four 

 limbs started to^'ether while the plant was very small, horizontal ones showing 

 dead ends; 4, similar case; 5, living branch which started when the tree at this 

 point was only two seasons old; 6, similar to No. 5. Right column, reading down: 

 I, oblique cut across dead stub; 2, ditto; 3, oblique limb buried but cut across; 

 4, dead limh being buried; 5, similar but at different angle; 6, limb which started 

 when the trunk at this point was probably six or seven years old, had a good chance 

 to grow for a few years and then was killed. 



