494 



APPENDIX C 



TABLE LXXXI 



Tables for Values in Schtffel's Formula for Cubic Volumes of EhrrniE Stems. 



)ntents of trees by a short method (Sphiffel's 

 +0.66fa). 



This tabic is for use in calculating the cub: 

 formula): 



r = H(0. 



The field measurements necessary for this calculation are the diameter breast-high and the 

 diameter at the middle height of the tree. To find the volume look up 0.16 of the area corre- 

 sponding to the D.B.H. of the tree. Add to this 0.66 of the area corresponding to the diameter 

 at the middle height. The sum of the two multiplied by the height of the tree equals the total 

 volume of the tree in cubic feet. Thus, if the total height of the tree is 62.5 feet, the diameter 

 breast-high 10.4 inches, and the diameter at the middle 8.1 inches, from tables 0.16B and 0.666 

 it is found that the areas corresponding ot these diameters are 0.094 and 0.236, respectively. 

 Their sum, 0.330, multiplied by the height, 62.5, equals the volume, 20.6 cubic feet. 



