CHAPTER Ii. 



i:he volumetric method of organisation. 



SECTION I. 



DESCRIPTION OF THE METHOD. 



o»;o 



The various volumetric methods of forest organisauiuix are 

 based on tte division of the rotation and the quantity of produce 

 into equal and Corresponding portions. Among these methods we 

 will describe that of Harfcig, from which all the rest have been 

 derived and which gives a good general idea of them all. Ta 

 estimate the total quantity of produce that the forest can furniah, 

 it is indispensable to know befoifehand when each of the crops 

 composing a Working Circle will be fit to cut. The Am^nagiste is 

 thus obliged to make a forecast of the various ages at which the 

 different crops should be exploited. The rotation having been 

 determined and the order of the successive annual exploitatiotis: 

 fiied pi'ovisionally, this forecast naturally follows as the next step. 

 Dividing the rotation into a certain number of equal periods, the 

 Am^nagiste must make a trial distribution of the various compart- 

 ments amongst these periods taking Care to follow, the order indicated 

 by the age of the ci^ops and the Rules for locating cOupes. This dis- 

 tribution takes the form of a tabular statement, divided into as many 

 compartments as there are periods in the rotation, and which we 

 •*vill call the .Trial Working Scheme. He must then estimate 

 the quantity of produce which each compartment of the forest is 

 likely to yield during the course of the different periods. A separate 

 estimate must be made for the principal and the accessory pro- 

 duce, for the first by supposing that each compartment will be 

 regenerated towards the middle of the period to which its e-xploi- 



