CHAPTEE, III. 



FOREST ORGANISATION BY AREA, 



SECTION I 



DESCEIPTION OF THE METHOD. 



The Method of Forest Organisation by Area is based on the 

 twofold division of the Rotation and of the Working Circle into 

 equivalent or corresponding portions. It begins, by first dividing the 

 Rotation into a certain number of, usually, equal Periods, and then 

 the Working Circle into as many portions, each to be regenerated, 

 in regular succession, during the respectively corresponding Period. 

 These portions of the Working Circle we will term PerioMC 

 Blocks. They are intended to be expkited in equal periods of 

 time, and ought therefore to be so formed that they may, as far 

 as possible, furnish severally the same yield. 



The correlative division of the Rotation into Periods and the 

 Working Circle into Periodic Blocks must be made according to 

 certain rules, which we will examine further on. 



It is generally exhibited in the form of a table, in which the 

 various compartments belonging to the several Periodic Blocks are 

 grouped together according to their respective Periods, the charac- 

 teristic letter and area of each compartment being duly entered. 

 This table is thus a general skeleton plan of the exploitations, 

 and constitutes what we shall call the General Working Scheme. 

 Being drawa up once for all for the duration of a whole Rotation, 

 it should contain nothing more than what concerns the simple 

 composition of the Blocks, i.e., give the compartments of which 

 they are composed and the order in which they are to be 

 tegenerated. 



