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FIG. 82 HISTORY OF A STUB IN SIX CHAPTERS 



Reading down (left) 1, outside bark section showing extension of wood from 

 trunk to try to heal in the stub rotted out where the hole is left; 2, stub rotted out, 

 leaving hole. Decay of wood occurred after the tree was cut; 3, wood nearer h art 

 of tree. (Right) 4, decayed knot in place; 5, decayed spot beside almost hea'thy 

 knot; 6, knot in healthy condition except for checks decay not progressed so far. 

 In the lower right-hand corner of each section is shown a second knot left hy a 

 stub. In 4, 5 and 6 note holes caused by borers. Decay often enters by such means. 



