DISCUSSION OF LOG RULES. 35 



The following is a comparison of log rules which may be expressed 

 in the form: 



Bangor: (Original values slightly erratic) 



Boynton: (Original values erratic) 



.350) ^ _ .07 L = B.M. 



4 X 12 



Parsons: (Original values erratic) 



- - .246) -- - l L = B.M. 

 4 X 12 



Warner: (Original values erratic) 



Spaulding: (Original values slightly erratic) 



[TT D* 1 



(1 .266) - -- 2 L = B.M. 

 ' 4 X 12 J 



Hannah : (Original values very erratic) 



Applies approximately to logs from 12" to 42" in diameter. 

 This rule is very poorly constructed. 



Wilcox: (Original values erratic) 



[(1 .340) 2] L = B.M. 

 L -4X12 J 



Finch and Apgar: (Original values very erratic) 



