165 



can be done at present whether the Bize of exploitability for the sal should be raised 

 to exactly 6' 9" or to more or less. 



When the necessity for suoh. an intermediate revision 

 comes under consideration, a careful enquiry should be made 

 as to how the plan has worked in the past period. An 

 examination of the work done in the forest vdll show 

 whether the method of treatment has given sa,tisfaetory 

 results ; whether the cuttings were suitably located ; and 

 also if other works, cultural and otherwise, such as those of 

 regeneration, road-making, and cultivation, have been satis- 

 factorily carried out in accordance with the plan and with 

 what results. Mistakes in the original plan, or the manner 

 of carrying it out, will thus he brought to light, and steps 

 can be taken to avoid their recurring, if possible, during the 

 next period. In such a case, the work done at the time of 

 preparing the working-plan can again be made use of, only 

 sulSsequent changes being taken into account. Suoh alter- 

 ations will also be made in the scheme of working as expe- 

 rience has proved to call for. The importance and extent of 

 the changes to be introduced will decide whether an entirely 

 new plan should be framed or not, or whether the old one 

 can be altered suflBciently to satisfy the new conditions. 



