
CUBIC MEASURE. 69 
from 500 to 1,000 board feet. So much depends upon the quality 
of the wood, the purpose for which it is to be used, the method of 
piling, etc., that no constant converting factor can be given. 
Bark is piled in stacks and measured in the same way as fire- 
wood. 
CUBIC MEASURE. 
The cubic foot is not generally used in the United States. When 
used it is employed to measure spars and other long sticks and 
occasionally to measure cord wood. From the statement just made 
the New Hampshire or Blodgett Rule must be excepted, because 
that rule is based on an artificial cubic foot, established by statute, 
and larger than the standard cubic foot. (Cf. page 44. ) 
In measuring logs for their cubic contents, it is customary to 
take the average diameter of the log, either measuring it at the 
middle point or averaging its two end diameters. The measure- 
ment is taken inside the bark. 
The cubic foot is often used by foresters in studying the growth 
of trees. It is also used as a basis for the construction of tables of 
contents of standing timber, as explained on page 109. 
Cubic Contents of Logs, including Slabs. 
The table which follows shows the total cubic contents, includ- 
ing slabs, of logs of different diameters and lengths. The diame- 
ters given are obtained by averaging both ends of the log or by 
measuring its diameter at the middle point with calipers. This 
table assumes that the contents of a log are equivalent to the con- 
tents of a cylinder having the same length as the log and the same 
diameter as the average diameter of the log. 
The rule for determining the contents of logs is as follows: Find 
the area in square feet of a circle having the same diameter as the 
average diameter of the log, and multiply this by the length. The 
result is the contents in cubic feet. The areas of circles of different 
diameters have been computed and will be shown among the tables 
in Part II of the Woodsman’s Handbook. 
Tn using the table for cubic feet more accurate results can be 
obtained for short than for long logs. 
