ABSOLUTE FORM QUOTIENT 349 



had time to fill up in the top portions. The absolute form factor for 

 form class, 0.744, according to Jonson's measured series, is 0.519, as 

 compared with 0.524 from the computed series. 



Red Pine — Form Class 7Q.5. 



Only seven trees belonging to this form class were analyzed. These 

 trees were all taken from a very much over-crowded stand of young 

 red pine and they can hardly be considered as normal. The series ob- 

 tained, however, compared very closely with Jonson's Scotch pine 

 series in the lower half of the stem, but showed a marked falling off in 

 the top sections. The average age of the trees was 42 years, average 

 height was 46 feet, and average d.b.h. only 5.2 inches. 



White Pine — Form Class ^g.J — Average 5 Trees. 



Diam. at 



sec. in per cent 



of d.b.h. (b.h.) I II III IV V VI VII VIII IX 



White pine 100 93. 85.5 77.8 69. 59.7 49.4 37.6 25.5 12.5 



Scotch pine 



computed 100 93. 85.6 77.6 69. 59.7 49.6 38.4 25.7 11.8 



Variation 



in per cent ±0 —0.1 -fO.2 ±0 .... —0.2 —0.8 —0.2 -fO.7 



Absolute form factor, white pine 0.400, Scotch pine 0.400. 



Average age. 40 years. 



Average height, 41 feet. 



Average d. b. h., 6.3 inches. 



White Pine — Form Class 6j.§ — Average i^ Trees. 



Absolute formfactor, white pine 0.365, Scotch pine 0.366. 

 Average age of trees, 40 years. 

 Average height, 49 feet. 

 Average d. b. h.. 6.2 inches. 



