66 



PRIHCIPLES OF AMERICAN FORESTRY. 



The size of the openings will depend here as in the 

 strip method on the species grown and natural con- 

 ditions. Generally the first openings will be from one- 

 fourth to one-half acre or more, and the strips taken 



FIG 10. Diagram illustrating the system followed in the group 

 method of cutting. Cuttings are begun at points marked 1, and 

 are gradually extended by successive cuttings as indicated by 

 Figs. 2, 3, 4/and 5. After Schlich. 



around them should in width not greatly exceed the 

 height of the trees in the strips next to be cut. Succes- 

 sive strips should be cut only when the previous strips 

 had become well stocked with trees, i.e. when regenera- 

 tion is accomplished. 



