167 



SECTION. IV. 



Periodic Revision of the Organisation Project. 

 The complementary measures, the employment of which we 

 have just enjoined, are quite sufficient to provide against all contin- 

 gencies and to guarantee the success of the operations prescribed by 

 the Special Scheme of Exploitations. But this Scheme is drawn up 

 for the duration of one Period only, and consequently a fresh Scheme 

 must be prepared for the next following Period also. Like the first, 

 this latter will determine the succession of the exploitations for the 

 whole duration of the new Period, and fix the yield of the annual 

 fellings as wall as the quota of the Reserve Fund. 



The operation here sketched, which we have termed the Perio- 

 dic Revision of the Organisation Project, necessitates a new 

 and complete study of the forest at the end of each Period. That 

 study, while it brings out into prominence the results heretofore 

 achieved, shows in a clear manner the modifications that it would 

 be useful or necessary to make in the general management of the 

 forest. Among these modifications there would be some that would 

 in no way affect the ground-work of the Organisation Project; such 

 would be, for instance, any proposed change in the special treat- 

 ment of certain compartments. Other modifications may have for 

 result the alteration of the boundaries of the Block ; but so 

 radical a measure should be avoided except in cases of well proved 

 necessity. More generally it would be a change of Rotation that 

 would seem desirable, in which case it would be enough to prolong 

 or curtail the duration of each Period in the same proportion as the 

 Rotation, without in any way changing the General Working 

 Scheme. 



In a well treated forest, it generally happens that a portion of 

 the Reserve Fund is available for exploitation at the end of each 

 Period in the Block, of which the regeneration has just been 

 completed. The manner of turning this portion of the Reserve 

 Fund to account is obvious enough : it must form for the next fol- 

 lowing Period a resource to fall back upon in case of emergency, 

 and the produce furnished by it must not be considered as part of 

 the regular yield of the forest. In the event of urgent wants ari- 

 sin<T before a new Reserve Fund can be formed, it would be perfect- 



