466 Forestry Quarterly. 



Crown Space Computation. 



Proportional Crown Space 

 Crew, of Average Mature and Relative Total Space. 



Young Trees. 



1 2 to I 218X1 =2i8>| r53% 



93X2 =i86|404|4^^^ 



2 2.5 to I 262X1 = 



66X2.5 



3 2.7 to I 237X1 ==237^/46% 



103X2.7=278/^ ^154% 



Apportionment oe Areas Between Young and Mature 



Timber. 



Mature. Young. 



262-^ r6i% 



Resulting Distribution oe Areas. 



Young 

 Crew. Veteran. Mature. Merchant- Immature. Total. 



able. 



It appears that Crew No. i has mapped a much smaller area 

 to veterans, and also to immature timber, than Crews 2 and 3. 

 When the yields were computed, it was seen clearly that this crew 

 had been mistaken in their judgment on both points. 



