TOTAL PER CENT OF WASTE IN LOG 57 



too much on small logs, where the slab waste is normally high, and too 

 little on large logs, where the greater portion of the deduction is for saw 

 kerf. Such a rule can be correct only for a single diameter class where 

 the two errors happen to balance. 



On the other hand, if too small a deduction is made for slabs, and 

 too large for sawdust, small logs may be overscaled, while the increasing 

 per cent of utilization possible in larger logs will not be shown in the 

 scale (Column 8), and the rule therefore tends to under-scale large sizes. 



