FELLING-PLAN. 



129 



increment for this period also as nearly as possible. As the end 

 of sub-period I 1 , approaches, a revision is made of the estimates 

 of yield in the various remaining compartments, so as to be then 

 able to determine more accurately what should be felled in sub- 

 period I 2 . And of course adjustments have often to be made 

 between Periods I. and II., and between sub-periods I 1 , and I 2 , 

 of Period I., in order to try and equalise the Annual Falls. 



