LOG-SCALING RULES 215 



All saw timber will be scaled by the Scribner Decimal log rule. This 

 rule drops the units and gives the contents of a log to the nearest ten. 

 When the total scale of a log is desired, all that is necessary is to add 

 one cipher to the sum of the numbers read from the scale stick, except- 

 ing the contents of 6 and 8 foot logs, 6 and 7 inches in diameter. These 

 are given as 0.5, which, multiplied by 10, gives 5 feet as the actual con- 

 tents. 



In the absence of a scale stick, or where the position of logs in the 

 pile makes its use difficult, the diameters and lengths may be tallied 

 and the contents figured from a scale table later. 



Purchasers should be required to skid logs for scaling, if the cost of 

 scaling will be materially decreased by these requirements and if the 

 cost of logging will not be greatly increased. 



The forest officer should always insist on having one end of piles or 

 skidways even, so that ends of logs may be easily reached. 



When necessary and possible, the purchaser will be required to mark 

 top ends of logs to avoid question when they are scaled in the pile. 



Each log scaled must be numbered with crayon. The number will 

 be the same as that opposite which the scale of the log is recorded hi 

 the scale book. 



The logs in all skidways must be counted, and the number in each 

 checked with the entries in the scale book. 



Each merchantable log after scaling will be stamped " U.S." on at 

 least one end. Logs so defective as to be unmerchantable will not be 

 stamped, but will be marked " cull." 



On all national forests except those in Alaska and on the west slope 

 of the Cascade Mountains in Washington and Oregon, logs over 16 feet 

 long will be scaled as two or more logs, if possible in lengths not less 

 than 12 feet. 



The following table shows how the lengths will be divided when 

 scaling logs 18 to 60 feet long. The number of inches to be added to 

 the diameter at the small end of each log, to cover taper, is placed under 

 each length. 



For example, a 42-foot log 16 inches in diameter at the top would be 

 scaled as 



One 12-foot log with a diameter of 16 inches. 



One 14-foot log with a diameter of 17 inches. 



One 16-foot log with a diameter of 19 inches. 



