114 LOGGING 



in which V is the volume in cubes, D the diameter in inches and 

 L the length in feet. One cube is assumed to be equal to 12 

 board feet. 



CUBIC MEASURE 



The chief use of the cubic measure is for the determination of 

 the contents of logs which, with the exception of the bark, are 

 used in their entirety, such as for pulpwood, excelsior wood and 

 rotary-cut veneer stock. 



The methods most commonly used are as follows : 

 Method of Cubing Logs by the Measurement of the Length and 

 Middle Diameter. — The volume of a given log is determined by 

 the formula 



V =AL, 



in which V is the volume in cubic feet, A the area in square feet 

 of the middle cross section and L the length in feet. 



This method is simple and it is easy to secure the measurements 

 provided the middle of the log can be reached. 



Method of Cubing Logs by the Measurement of the Length and 

 Both Ends. — This requires one more measurement than the 

 former and hence is not so rapid. It is adapted for use where the 

 middle diameter cannot be secured. 



The formula for determining the volume is 



2 



in which V equals the volume in cubic feet, B and b the area in 

 square feet of the large and small ends, respectively, and L the 

 length in feet. 



Cord Measure. — The standard cord contains 128 cubic feet of 

 stacked wood, or a pile 4 feet wide, 4 feet high and 8 feet long. 

 In some parts of the country, especially in the Middle West, fire- 

 wood is often sold by the "rick," which is a stack 4 feet high, 8 

 feet long and usually 12 or 16 inches wide. A stack of the 

 same height and length and 24 inches wide is sometimes called 

 a " single cord." 



Although a standard cord contains 128 cubic feet of stacked 

 wood, the sohd cubic contents are extremely variable, depending 



