280 WOOD AND FOREST. 



Selection Forests. The typical virgin forest, Fig. 12.5, is one in 

 which trees of all ages are closely intermingled, and it may be either 

 "mixed" or "pure." If a farmer had a woodlot of this character and 



Fig-. 125. Vil-yin Forest. Trees of All Agres. Jackson Co., North Carolina. 

 L^.S. Forest Service. 



every year went over it with the ax, cutting out such trees as he 

 needed for liis purpose, and also trees whose removal would improve 

 the woods, Ijut talving care not to cut out each )ear more than the 



