Bui. 24, Bureau of Forestry, U. S. Dept. of Agr. 



BEFORE CUTTING 



PLATE VI. 



Age 



10 20 30 40 50 60 70 SOYrj 



AFTER CUTTING 





20 30 40 50 60 70 BOYra. 



AFTER 40 YEARS 



50 60 70 





AFTER 60 YEARS 



Ag 60 70 80 10 ___ 20 30 40 SO 60 Yr. 



DIAGRAM TO REPRESENT THE PROGRESS OF CUTTING IN REGULAR SEED FOREST. 

 Each tree represents one even-aged division. Only one division in ten is represented. 



