DISCUSSION OF LOG RULES. 



45 



The following tables illustrate how the transformations described 

 above may be made : , 



TABLE 2. Average volume in board feet, as shown by the Spaulding 

 Log Rule, contained in merchantable portion of immature western yellow 

 pine trees of different merchantable lengths and diameters breast high. 



TABLE 2. 



This table is based upon the original measurements of 502 trees. 



