302 



DIVISION OF AREA. 



sometimes throw trees in a direction which differs from the 

 ordinary direction of gales. In many cases reliable informa- 

 tion can be obtained from local people who have lived for 

 some time in the locality. 



The laying-out of the system of rides is of great importance, 

 because it is used in the protection of the woods against 

 natural phenomena, and it leads to order in the management. 

 These advantages outweigh the loss of productive area, which 

 is, after all, very limited. Eegular networks of rides, with 

 right angles, are only practicable in the plains ; on hilly ground 

 they must accommodate themselves to the configuration of the 

 ground. The following example (taken from Judeich) will 

 illustrate this : 



The forest occupies a ridge, the slope of which is indicated 



by dotted contour lines . The top of the ridge, being 



much exposed, must be treated as a separate working section 



DIKKCTIOK. 



Fig. 51. 



