214 



WORKING PLANS 



Very few high forests in England have anything approaching 

 a proper series of age classes, and it is often the main object 

 of the compiler to obtain it as soon as possible. 



Felling Series. 



Where the woods consist wholly of broad-leaved trees, or 

 of a mixture of conifers and broad-leaved trees, the working 

 circle need not be divided. But in extensive pure conifer 

 woods there is danger of serious damage by insects if a felling 

 is made adjoining an area cut within the last three or four 

 years, which is stocked with a young plantation. To avoid 

 this the working circle is divided into several felling series^ 

 and a felling is made in a different one each year, so that the 

 crops in a series vary by a fixed number of years. Thus, if 

 it is decided that three full years should elapse before a cutting 

 is made next to a previous one, the working circle is divided 

 into four series A B CD, and the fellings proceed as indicated 

 in the following diagram. 



Felling Series C. Felling Series^. 



Wind 

 direction. 



Felling Series D. Felling Series B. 



It will be seen that the working circle will contain, at the 

 end of the rotation, a complete series of age classes as before, 

 but these will not follow each other regularly over the area. 

 The felling series need not be marked on the ground, but, in 



