56 



Cross section at 114 feet from the ground of tJie average tree of group. 

 Site /. — Dominant group of 16 trees. 



Cross Section: No. 7. 



Height from ground, 114 feet. 

 Width of bark, 8 millimeters. 

 Number of rings in sap, 34. 

 Width of sap, 33 millimeters. 

 Number of rings. 122. 



Number 











Accretion for 



of rings 











decades. 



.'pfintpr to 



Kadius 



Diamf>+fir 



Area 





periph- 

 ery).) 











Area. Diameter. 



I 





Mm. 



Mm. 



Inches. 



Sq.ft. 



Sq.ft. 



Inches. 



10 



18 



36 



1.4 



0.01 



0.01 



1.4 



20 



36 



72 



2.9 



.04 



.03 



1.5 



30 



52 



104 



4.2 



.10 



.06 



1.3 



40 



67 



134 



5.4 



.16 



.06 



1.2 



50 



81 



162 



6.5 



.23 



.07 



1.1 



60 



94 



188 



7.5 



.31 



.08 



1.0 



70 



108 



216 



8.6 



.40 



.09 



1.1 



80 



119 



238 



9.5 



.49 



.09 



.9 



90 



130 



260 



10.4 



.59 



.10 



.9 



100 



140 



280 



11.2 



.68 



.09 



.8 



no 



151 



302 



12.1 



.80 



.12 



.9 



120 



161 



322 



12.9 



.91 



.11 



.8 



122 



162 



324 



13.0 















Cross section at 129 feet from the ground of the average tree of group. 



Site /. — Dominant group of 16 trees. 



Cross Section: No. 8. 

 Height from ground, 129 feet. 

 Width of bark, 6 millimeters. 

 Number of rings in sap, 31. 

 Width of sap, 30 millimeters. 

 Number of rings, 91. 



Numlier 











Accretion for 



of rings 











decades. 



(center to 



Eadius. 



Diameter. 



Area. 









periph- 

 ery). 











Area. 



Diameter. 

 Inches. 





Mm 



Mm. 



Inches. 



Sq.ft. 



Sq.ft. 



10 



14 



28 



1.1 



0.01 



0.01 





20 



29 



58 



2.3 



.03 



.02 





30 



43 



86 



3.4 



. .06 



.03 





40 



56 



112 



4.5 



.11 



.05 



1. 1 



50 



70 



140 



5.6 



.17 



.06 





60 



81 



162 



6.5 



.23 



.06 



.9 



70 



92 



184 



7.4 



.30 



.07 



.9 



80 



104 



208 



8.3 



.38 



.08 



.9 



90 



• 116 



232 



9.3 



.47 



.09 



1.0 : 



91 



117 



234 



9.4 















The preceding tabulations are used for constructing the average tree 

 of the group, as shown m fig. 13. 



height growth. 



The progressive development of the height growth is determined by 

 means of graphical interpolation, taking as a basis the heights and 

 ages of the cross sections as expUiiued under caption ^'Rate of growth." 

 The tree under analysis reached the height of the first cross section 

 (18 feet) in the course of 17 years (age of tree minus age of section) j 



