DEFINITIONS AND GENERAL IDEAS, 3 



The distinction between two systems lies in the 

 method of reproduction adopted, whether by seed or 

 by shoots. 



In the same system, there are different ways of 

 working the forest ; hence the various methods of 

 treatment. 



A working circle is a certain extent of forest, 

 intended to furnish a succession of cuttings during 

 the whole length of the rotation, and which is 

 sufficiently homogeneous with regard to soil, climate 

 and species, to admit of one and the same system, 

 the same method of treatment and the same rotation. 

 It is termed regular when fin addition the various 

 crops composing it are of graduated ages, and each 

 age is equally represented. 



A portion of a working circle intended to be re- 

 generated in the course of one period is called 

 a periodic block ; there are as many blocks in a 

 working circle as there are periods in the rotation, 

 and they should be constituted so as to yield, as far 

 as possible, equal quantities of produce. 



A high forest is a forest composed of seedlings, 

 whatever be their age ; its object, generally speaking, 

 is to yield large timber, and its reproduction is 

 effected by seed. A coppice or copse is a forest 

 the reproduction of which is effected chiefly by 

 means of shoots or suckers. 



A forest is said to form leaf-canopy, when the 

 crowns of the trees touch each other without being 

 swayed about by the wind. 



There are various stages of leaf-canopy depending 

 upon the age and size of the trees that compose it, 



