MILL TALLIES 



151 



TABLE OF LOSS BY HOLES OR ROT NEAR THE CENTER 



OF LOGS, GOOD FOR DEFECTS MORE THAN 4 



INCHES FROM THE BARK 



on arbitrary rules or on guesswork. Proper discount may 

 vary greatly, too, with the mill practice and product. A 

 mill with a box factory attached, or sawing round-edged 

 stuff which is measured regardless of crooks, wastes little 

 or nothing on account of defective form. For a mill 

 which can market only three-inch deals at a profit, an 

 entirely different system of scaling is appropriate. 



SECTION VII 

 MILL TALLIES 



Thousands of unrecorded tests of scale rules have doubt- 

 less been made at the saw, using local and current scaling 

 and sawing methods. During the last few years a number 

 of such tests have been made under stated conditions so 

 carefully guarded that they may serve a general purpose. 

 Reference is made to the tests recorded on pages 143 and 

 144 of this work. The following also are reliable and of 

 interest to northern workers in timber. 



The wide variation in the yield of logs as sawed under 

 different conditions is a matter of great importance in 

 several ways to the worker in timber, chiefly, perhaps, for 

 its bearing upon timber estimates. The relative compe- 



