56 



NATIONAL FOREST MANUAL TIMBER SALES. 



be cut on both sides affected by the curve, thus determining the 

 amount of loss caused by the sweep. It should be remembered that 

 boards sawed near the slab are always narrower and contain fewer 

 board feet than those sawed from the balance of the log. 



No deduction should be made for curve or sweep in logs over 16 

 feet long. 



Except in rare cases, crotches do not affect the scale of logs suffi- 

 ciently to require deductions. If sawyers do their 

 work properly they will cut back on the log sufficiently 

 to eliminate the part affected by the crotch. 



The sealer should obtain the average diameter of the log imme- 

 diately below the enlargement caused by the crotch. 



Scribner Decimal "C" Log Rule. 



FOR LOGS UP TO AND INCLUDING 32 FEET IN LENGTH. 

 [Contents of logs.] 



