COmPLKMBNTaKY prescriptions op the WOfeKtSG SCSEME. 1 67 



BUdden emergency, there would be no alternative but either to cut 

 nothing at all or to exploit small and immature timber." 



The remarks just quoted apply to high forests worked by the 

 Natural Method, in which of class forests the principal exploitations 

 come back to the same point only after a very long interval of 

 years. A Reserve Fund composed of trees all in one piece of forest 

 would ill fulfil the condition of always offering immediately available 

 resources, unless indeed it covered a very large area. But it is 

 easy to obtain the most desirable results by forming the Reserve 

 Fund of trees scattered over all the coupes and based on their ag- 

 gregate contents, a method of procedure in perfect keeping with 

 bi^h forest exjjloitations. 



In the organisation of high forests by area, the quantity of 

 standing material to be set aside for the Reserve Fund may be deter- 

 mined by one of two methods or by both together. The on^ 

 consists in leaving out of account the future increment when cal- 

 culating the annual yield ; the other in reducing by a certain 

 quantity the quota of the annual cuttings. Take, for instance, 

 a mass of forest 150 years old ; the mean annual growth is 

 evidently the 1/I50th, part of the contents of the standing timber. 

 Given the Block and Period to which this ma^s belongs, the quan- 

 tity of the stock to be reserved can be approximately deduced 

 from the annual rate of growth thus determined. On the other 

 hand, if the quota of the annual cuttings is 21,000 c. ft., 3,500 c. ft. 

 may be preserved each year from the quantity that can be cut to 

 form the Reserve Fund, In the laiter case, the amount of the 

 annual savings set aside is a determinate figure, while in the othei' 

 case the future increment can never bj known with certainty. 



However it be, the Reserve Fund when based on volume always 

 represents so much exploitable timber over and above the quota 

 of the annual cuttings, and sometimes also comprises trees with a 

 long future befoi'e them. At the moment of need, every cubic 

 foot saved up, may be utilized except this last class of trees. To 

 find out at any time the present quantity of the Reserve Fund< 

 we have only to know according to which of the two methods 

 above described it has been formed and the number of years it has 

 been in existence. To utilize it, there is nothing more to be done 

 than to cut everything in the Block under regeneration. 



