32 



and divide by the square of the diametcrr of the standard; then 

 divide by the length of the standard and multiply by the length 

 of the log. 



THE NINETEEN-INCH STANDAND RULE. 



One of the standards in most common use is the so-called Nine- 

 teen-inch Standard, or ''market," of which the unit is a log 13 

 feet long and 19 inches in diameter at the small end inside the 

 bark. Expressed algebraically, the formula for determining the 

 contents of a given log by the nineteen-inch Standard Rule is: 



V=p^ L ij 



19^>^13 

 in which V represents the volume in standards, D the diameter 

 inside the bark at the small end,' and L the length of the log. 



This log rule is most commonly used in the Adirondack Moun- 

 tains of New York. It is particularly popular in measuring pulp 

 wood, because the rule is based on volume and not on board 

 measure. 



Standard measure is commonly, though incorrectly, translated 

 into board measure by multiplying the volume of a given log in 

 standards by a constant. In the case of the Nineteen-lnch Stand- 

 ard Rule it is assumed that one standard is equivalent to 200 board 

 feet, and the number of standards in a lot of logs, multiplied by 

 200, gives the approximate board contents. 



THE NEW HAMPSHIRE (BLODQETT) RULE. 



Although usually not recognized as a standard log rule, the 

 Blodgett Rule, which has been adopted as the statute rule of New 

 Hampshire, is nothing more nor less than a standard rule based on 

 the same principles as that of the Adirondack ''market." The 

 Blodgett standard a^ssumes as a unit a log 1 foot long and 16 inches 

 in diameter. The contents in so-called cubic feet (more correctly, 

 standards) of a log of any dimensions is found by the following 

 formula: 



in which T'is the volume in standards or ''Blodgett cubic feet," D 

 the diameter in inches, and L the length of the log in feet. ^ 



