324 Forestry Quarterly. 



Compilation of Final Volume Tables. 



In order to round off and harmonize the values given in the 

 fourth column of Tables i to 3, the average volumes for each 

 diameter class were plotted in the usual manner, and curves 

 were drawn for each Site Quality, due weight being given to 



LODGEPOLE PINE. 



Site Quality Volume Table. 



Arapaho National Forest, Colorado 



computed from actual scale of logs and props : scribner rule, decimal c. 



Values read from curves — Basis 2015 trees. 



Site Quality i Site Quality 11 Site Quality iii 



D. B. H. Feet Lin. Ft. Aver. Ft. -Lin. Ft. Aver. Feet Lin. Ft. Aver. 

 In. B M Props Total B M Props Total B M Props Total 

 Ht. Ft. Ht. Ft. Ht. Ft. 



6 o 20 52 o 18 40 o 15 30 



STUMP height equals i foot. Volumes in feet, B. M. include all ma- 

 terial down to the 6-inch diameter in the top ; linear feet from this point 

 to a minimum of 5 inches. This table is built from perfect trees, there- 

 fore, does not allow for defect. 



those points which represented the largest number of trees 

 These three curves each showed uniform increases of volume 

 with diameter, but did not always show uniform progression for 

 the same diameters in different sites. Theoretically this latter 

 uniformity could have been obtained by again plotting the values 

 from the first set of curves for each diameter class in the three 

 sites, but since for each diameter class there would have been 

 but three points, it was found difficult to draw uniform average 



