THE WOODSMAN S HANDBOOK. 
qo 
(os) 
The Doyle Rule. 
This rule is known in some sections as the Connecticut River 
Rule, the St. Croix Rule, the Thurber Rule, the Moore and Bee- 
man Rule, and the Scribner Rule. It is often called the Scribner 
tule because it is now printed in Scribner’s Lumber and Log 
Book. The Doyle Rule is used throughout the entire country and 
is more generally employed than any otherrule. It is constructed 
by the following :ormula: Deduct 4 inches from the diameter of 
the log as anallowance for slab; square one-quarter of the remain- 
der and multiply the result by the length of the log in feet. It 
was originally intended that in the use of this rule the average 
diameter of the log should be taken, but the usual custom is to 
measure the diameter inside the bark at the small end. 

