Bui. 24, D'v. of Forestry, U. S. Dept. of Agr 



Plate XXXIV. 



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CO 



-I 

 a 



TO < 



5' '^ 

 TO ^ 



i i 



-. m 



CO 2 



CD _ 



n) z 



B> 



E 



o O 



^ O 



> 



m 2 



o 33 

 ^" m 



X I 

 c O 



3 ° 

 tr m 



O m 



O 



2 O 



15 > 



o 



