STANDARD MEASURE. 33 



Just as in the case of the Adirondack standard, lumber men are 

 accustomed to convert the Blodgett Rule into board measure. The 

 statute requires that the ratio of the Blodgett standard to the thou- 

 sand feet shall be as 100 is to 1,000, or 10 board feet in every cubic 

 foot. In practice, however, the lumber men consider that there 

 are 115 Blodgett feet in 1,000 board feet when the diameter meas- 

 urement is taken at the middle of the log and 106 Blodgett feet per 

 1,000 board feet when the measurement is taken at the small end 

 of the log. These figures are fair averages for small logs only, and 

 in practice are suitable for converting the scale of a large lot of 

 small logs lumped together from one measure to the other. It is 

 not, however, fair to construct a log table for board measure by 

 dividing the values in the Blodgett Rule by the constants 106 or 

 115. Factors that are good for small logs give too low results for 

 large ones; and this is the case \\ith the New Hampshire Rule. 



OTHER STANDARD RULES. 



Another standard rule is the so-called Cube Rule of the Ohio 

 River. This is based on the hypothesis that a log 18 inches in 

 diameter is the smallest one from which a 12-inch square piece can 

 be cut. To use local phraseology, an 18-inch log will cube once, 

 meaning that for each linear foot there will be 1 cube. To esti- 

 mate the contents of a log, square the diameter in inches, multiply 

 by the length in feet, and then divide by the square of 18. Alge- 

 braically: 



D 2 



Ordinarily 12 board feet are allowed for 1 cube. This rule is 

 known also as the Big Sandy Cube Rule. 



The Twenty-two Inch Standard Rule, sometimes called the 

 Saranac River Standard Rule, is still used to some extent in New 

 York State and probably elsewhere. The unit is a log 12 feet long 

 and 22 inches in diameter at the small end inside the bark. The 

 rule is used in the same way as the Nineteen-inch Standard Rule, 

 and a table may be constructed on the same principle. The 22- 

 inch standard log contains 252 board feet (Scribner Rule). Com- 

 mon usage gives four standards to the thousand board feet. 



38850 Bull. 3610 - 3 



