ALINHMEXT CHARTS IN FOREST MENSURATION 



795 



since they are to be used only when values of the II scale and of the B 

 scale have been used in conjunction. The smallest values on this V axis 

 are headed lA. since they are for use when the I and A scales liave been 



Fig. 13. — Graph for finding volumes of trees in ciil>ic feet by Schiffel formula. 



Tlie broken line indicates that the volume of a tree 4a inches in diameter at breast height 

 and 3 J inches in diameter at one-half the height and uo feet tall is 645 cubic feet. 



