11 THE VOLUMETRIC METHOB. 



tation is assigned, for the second by adding together the quantity 

 of material, that is likely to fall in each compartment in th© 

 thinning and other improvement operations during the several 

 Periods of the Katation, 



This done, the Amlnagiste must next sum upi the total 

 quantity of produce that would be obtained in each, of the various 

 Periods. But as these sum totals can never, save by a very 

 exceptional chance, be equal to one another, he must set about 

 equalizing the quantities to fall in each. Period by transfers from 

 one compartment of the Trial Working- Scheme to another, taking 

 care that he does, not thereby anticipate or put off till too late the 

 exploitation of the crops so transferred. The first distribution of 

 the compartments amongst the various. Periods of the Rotation 

 being thus altered, the result ia a second Tabular Statement which 

 we -will term the Final Working Schbjvie, or simply The- Working 

 Scheme. 



Then by dividing the total quantity of produce to bQ 

 exploited during the First Period by the number of years in that 

 Period, he obtains the annual yield, i, e. the number of cubic feet 

 to be removed each year from the whole Working Circle both ia. 

 the Regeneration Fellings and the Improvement Cuttings.. 



SECTION II. 



Application of the. Voldmetric ilBOBOD, 



The preceding analysis of the Volumetric Method shows, thafc. 

 It requires two principal operations :^(i), the quantitative valuation, 

 of all the timber to be exploited in each compartment, both, in the 

 Regeneration Fellings and Improvement Cuttings during each of 

 the Periods of the Rotation ; (ii), the equal distributioQ of thisL 

 produce amongst the various Periods. 



We have stated above that before beginning any of these 

 operations the compartments jnust be provisionally grouped 

 together according to the Periods during which they would be 

 severally regenerated, if nothing more but their age and the Rules 

 for locating coupes were taken into account. Now as the stand- 

 ing timber has to be felled in equal quantities every year, we may, 

 for purposes o*" ralculation, suppose, each cojnpartment to b" 



