66^ Yr ^XP 



TREE D.B.H. 

 12 CLASS (Incnes) 



50 

 <40 

 c30 

 20 

 c10 

 c 



1966 1967 1968 1969 1970 1971 



YEAR OF OBSERVATION 



Figure 2. — Tree mortality over the course of a beetle epidemic. . . . left segment . 



XP ^Yr^71 



TREE D.B.H. 

 12 CLASS (Inches) 



f50 

 <40 

 <30 

 <20 

 10 



V o 



1966 1967 1968 1969 1970 1971 



YEAR OF OBSERVATION 



Figure 3. — Tree mortality over the course of a beetle epidemic. . . . right segment . 



