52 



THE WOODSMAN'S HANDBOOK. 



The pulp manufacturer would of course ascertain how much 

 pulp he could get from a hundred cubic feet of logs, the shingle 

 manufacturer how many shingles, the veneer manufacturer how 

 many square feet of veneer, and the lumberman how many feet 

 board measure, and the price would be fixed accordingly. 



IEach manufacturer must finally find for his own mill a converting 

 factor if close calculation is desired, because such items as the 

 width of saw, the product, and the methods of the sawyer will 

 vary the output in different mills. An approximate factor may be 

 found, however, for the same general class of material and product. 

 In the case of lumber (1-inch boards) this factor varies with the 

 diameter of the logs. From mill studies conducted by the Forest 

 Service the averages for a number of mills have been determined. 

 The factors of course apply only to straight, *sound logs, since 

 the deduction for defect is made bythe sealer in the cubic-foot 

 scale. Hardwoods run a little lower for the larger diameters. 



TABLE 6. Relation between Solid Contents of 12-foot Logs in 

 Cubic Feet and Saw Cut in 1-inch Boards. 



< 



a Saw test for Forest Service in Maine, 1902, by H. D. Tiemann. 

 & Based on 167 logs, largely hemlock, some spruce and pine, 

 c Based on 224 logs, largely spruce, some pine. 

 d Based on 56 logs, largely hemlock, some spruce. 



