122 forest commissioner's report. 



Scaling Logs. 



Logs are scaled in board feet, and cubic feet — or some other 

 solid measure. A board foot scale does not give the solid con- 

 tents of the log, but the number of sound boards one inch thick 

 a foot wide and a foot long that can be cut from the log. Cubic 

 foot measure gives the number of solid cubic feet of wood in 

 the log, regardless of what merchantable product may be taken 

 from it. Another solid content measure is the standard, which 

 gives the amount of solid wood in the log in terms of pieces of 

 a given size. Board foot scale is usually applied to logs that 

 are to be manufactured into lumber, while cubic foot and 

 standard scales are taken of pulpwood and some other products. 



A good board foot scale to use is the Maine or Holland Rule. 

 A good solid content rule is the Blodgett. 



Board Foot Measure — Maine Rule. 



The Maine or Holland Rule gives the number of inch boards 

 a foot square that may be sawed from logs of different diame- 

 ters and lengths. The diameter is taken at the top end, inside 

 the bark — no bark should be included. The lengths may be taken 

 to the odd feet, but the logs should be cut at even lengths, so 

 that they will measure an even number of feet — 12, 14, 16, etc. 

 Care should be taken to obtain an average diameter at the top 

 end, and, in sound logs, measure to the nearest inch. It is cus- 

 tomary however to drop to the inch below, that is if a diameter 

 measures 16.7 inches call it 16 inches. But it is more exact in 

 sound logs of any size to raise than to lower. 



To scale logs, then, by the Maine Rule, measure the diameters 

 at the top end inside the bark, and the lengths, and obtain the 

 board foot contents from the rule given below. Example : A 

 log measures 16 inches diameter, and 16 feet long. Refer to 

 the rule and look down the left hand column headed "Length 

 in Feet" to the figure 16. Then across to the column headed 

 "16," under "Diameter in Inches." The board foot scale in 

 this case reads 179 b. f. — which is the scale of the log. 



If there is rot in the log deduction must be made. The worst 

 form of rot is center or heart rot, which appears in the end of 

 the log. Deduct for this form of rot as follows: 



