240 



W. A. W. DE BEUZEV1LLE. 



Section VII taken 55 feet above ground level showed 46 lings 



„ VIII „ 83 ft. 6in. „ „ 32 „ 



Top 23 ft. 6 in. long; total height 107 ft.; age 06 years. 



Thus at 35 feet from the ground there were only 55 rings 

 as against 66 at the base. This means that the part of the 

 tree above 35 feet had been in existence only 55 years, so 

 that it took 66 - 55 = 11 years for the tree to reach a 

 height of 35 feet. Thus the following table is prepared: — 



Height of Section 



in 



feet. 



Number of rings. 



Number of years taken to 

 reach height of Section. 













66 







15 









63 



3 



25 









58 



8 



35 









55 



11 



45 









50 



16 



55 









46 



20 



83 ft. 



6 



in. 





32 



34 



107 













66 



From this table a curve showing the height at different 

 ages is plotted (see Fig. 1). 



120 



) 20 40 



Age in Years. 

 Fig. 1. Graphic representation of height growth. 



