APPENDIX. 



19 



♦At 50, 60, etc., years from start of grove, 108 years ago, not fioiu start of each tree. 



Height growth 

 even-aged stand, 

 aftf-r tiri-. 



of different trees in an 

 grown up on oi)en laud 



Volume growth of same trees. 



/O XQ 00 "iO SO to 70 feo 90 ICr. 



Ykaks <jt' Age. 



10 3.0 00 Vo SO fco 7o i-0 <io iooin> 

 Years of Age. 



With the.se facts in hand, facts which are put before the eye again in 

 the shape of height and vohinie curves drawn on the same scale as before, 

 it is only necessarj^, in order to get the stand on the area at any given 

 time, to multiply through the contents of each of the model trees at that 

 time by the number of trees which in the present stand it was made to 

 represent. Thus at 00 years of age the larger trees in the stand are seen 

 to have been about 40 feet high. From data not here given they are 

 found to have been about 7 inches in diameter as well. ^Number 1 at that 

 time contained 6 cubic feet, and to get the stand of the quarter acre it is 

 to be multiplied b\- 12, the numl)er of trees in the present stand of which 

 it is the representative. Xumbers 3 and 4 have similarly to be multiplied 

 by 18 each, while number 2, representing 23 trees in the original stand 

 has to be multiplied only by 20.7. This tree, it will be remembered, was 



