GROWTH OF OAK IN THE OZARKS 



11 



the net volume. Since gross volume possesses a great scientific 

 but small practical value it is usually expressed in solid measure 

 as in cubic feet. That portion of the total volume which finds 

 commercial use the net volume is ordinarily expressed in the 

 commercial unit of measurement; in this case the cord. To facil- 

 itate comparison with the total volume the used volume is also 

 expressed in cubic feet. The relationships of these volumes to the 

 diameter at breast-height are shown in Figures 5, 6 and 7. 



Tables V to VIII were read from the curves of Figures 3, 4, 

 5, 6, and 7. The first column shows the diameter outside the bark 

 at breast-height ; the following five columns show the correspond- 

 ing values read from the five curves. The last column shows the 

 distribution of the trees measured among the different diameter- 



TABLE III. DIAMETER GROWTH AT BREAST-HEIGHT WHITE OAK. 



