80 



the number of trees to be felled each year is prescribed. 

 The number of stems to be felled in each size or age-class 

 should be stated. 



When first applying such a method to a forest, the num- 

 ber of stems to be felled would not of course, as in the 

 example given, be the difference between the numbers of 

 trees in the various classes. In such a case, the number of 

 stems to be left on the ground having been determined in 

 the manner explained, reference would be made to the 

 results of the enumeration and the number of trees to be 

 felled would be deduced therefrom. 



Thus, suppose an enunaeration of the block or compartment to he exploited, con- 

 taining UOO acres, gave the following results ; — 



Class 



In order that the capital should be constituted in the manner required, it 

 would be necessary at the iiist operation to lell and reserve, on an average per acre 

 of the coupe — 



Of Class 



There would he reserved of Class IV 118 trees instead of 108, to make up for 

 the deficient number of trees reserved in Class 111. 



It need hardly be said that, when a mixed crop is dealt 

 with, the felling of each species should not be separately 

 prescribed as has been sometimes done in Indian working- 

 plans. At most the relative proportion of each kind should 

 be prescribed. This " storeyed forest " method of treatment 

 lias been seldom described, though it has been largely 

 applied in certain parts of Prance. It is stated to be parti- 

 cularly well-suited to hill forests, in which the uncovering 

 of the soil leads to a dense growth of forest w^eeds and thus 

 prevents reproductiou. 



