190 OUR NATIONAL FORESTS 



diameters are measured inside the bark at the top 

 end of the log and diameters are rounded off to the 

 nearest inch above or below the actual diameter. 



In the case of logs each one is numbered and the 

 number entered in a scale book with the correspond- 

 ing board foot scale of the log. In the case of ties, 

 posts, poles, mining timbers, etc., each pile or skid- 

 way is numbered and the count or scale entered 

 opposite the corresponding number in the scale 

 book. 



Disposal of Slash. One of the most important 

 features in National Forest timber sales is the dis- 

 posal of the brush or slash after logging. On ac- 

 count of the great diversity of conditions which 

 obtain on the Forests, the best way to dispose of 

 brush is not everywhere the same. Piling and 

 burning is required where the fire risk is great; 

 otherwise the method promising the best silvicul- 

 tural results is used. 



When piling and burning is necessary, all tops 

 and debris, including large chips made from hewing 

 ties, are piled at a safe distance from standing trees. 

 The piles are not allowed to be made in groups of 

 seedlings or young growth, against dead snags, near 

 living trees, or on stumps, large tops or logs, but 



