FOUEST COMMISSIOXEU'S REPORT. 



33 



AGE AND DIMENSIONS OF I,050 SPRUCE TREES. 



(a) Averaged in Classes According to Age. 



Class. 





01 







Pi 



01) 





be 





be 



m 

 bll 



a 



43 



s 



> 



<5 



(b) According to Butt 

 Diameter. 



be 



a 

 <a 

 be 



« 



Under 1'25 j'ears 



1-2.5-150 



iriO— 175 



175—200 



200—225 



225—2.50 



2.50—275 



275-300 



Over 300 



In. 



8.0 



8.5 



S.6 



8.9 



9.9 



10.0 



10.3 



11.5 



12.0 



9.2 



A log of the above dimensions contains 23 cubic 

 feet, or about 120 board feet. 



Under 10 in 



10-11 



11-12 



12—13 



13—14 



14—15 



15—16 



16—17 



17-18 



18—19 



19-20 



Over 20 ... . 



162.0 

 170.1 

 171.7 

 174.0 

 189.1 

 185.4 

 197.7 

 214.0 

 217.1 

 228.7 

 230.1 

 244.8 



A 13i inch tree, of course, is not as a rule older than a 14i inch tree. The irregu- 

 larity shown in the series would doubtless be corrected if a larger number of 

 trees was taken. 



Average of 50 pine logs: Age, 102.8; butt diauietor, 16.1; leii^'th, 30.3; top diam- 

 eter, 11. A log of these dimensions contains 30 cubic feet, or about 175 board feet. 



In regard to the age and size of pine far less satisfactory infor- 

 mation is at hand. Fifty trees from all conditions and of all siz s 

 form a very small basis for generalization. The figures will tell 

 something however A considerably larger log than the spruce is 

 only 103 years of age, while the average yearly growth ratdntained 

 is two and one half times that of spruce. This relation of the two 

 species is doubtless approximately true on the average and in the 

 long run. 



Another matter on which these figures throw light is the taper of 

 spruce logs. This varies so much that when it is of account it is 

 3 



