HEIGHT AND DIAMETER BASIS 



553 



Table 3 — Top Cutting Limit in Inches of IVestcrn Vellouj Pine Volume Tables. 



Note. — Four other tables are to a fixed S-inch, and one to a G-inch top. 



The variations in these figures are surprising and would not seem to 

 indicate any great consistency in the ideas of what constitutes used 

 length. Of course it might be argued that for different regions there 

 would naturally be differences in form and hence in utilization, but the 

 above table seems to indicate that some of the most extreme variations 

 are in the same or similar regions. Compare, for example, the first 

 three columns, or again the fourth and fifth. The following table gives 

 the actual cutting practice of two adjacent logging operations in very 

 similar timber on the east side of the Sierras, and that of the volume 

 table used by the Forest Service for that region. The fourth column 

 gives a forester's estimate of the merchantable limit made after falling, 

 but in advance of marking or bucking, for the trees represented in 

 cokmin 3. 



