BOARD AND CORD MEASURE 211 



foot. At $9 M., 1 sq. ft. is ^%^ ; at $8, j\^. Multiply the number 



of square feet B.M. by the price per square foot. 



To find the B.M. , multiply the length in feet by the thickness and 



width in inches, and divide the product by 12. Thus, a plank 18 ft. 



18 X 2 X 8 



long, 2 in. thick, and 8 in. wide contains — = 24 ft. B. M. 



1^ 



Or, the length of the plank in inches may be multiplied by the end 



area in square inches, and the result divided by 144. For example, 



the number of feet B. M. in a piece 18 ft. long, 2 in. thick, and 8 in. 



wide, will be 216 in. (18 ft. X 12) multiplied by 16 sq. in. (2 X 8, the 



end area), or 3456 sq. in., 1 in. thick; dividing by 144, the result is 



24 ft. B.M. 



Cord Measure (The Woodsman's Handbook, U. S. Forest Service) 



Firewood, small pulp-wood, and material cut into short sticks for 

 excelsior, etc., is usually measured by the cord. A cord is 128 cubic 

 feet of stacked wood. The wood is usually cut into 4-foot lengths, in 

 which case a cord is a stack 4 feet high and wide, and 8 feet long. Some- 

 times, however, pulp-wood is cut 5 feet long, and a stack of it 4 feet high, 

 5 feet wide, and 8 feet long is considered 1 cord. In this case the cord 

 contains 160 cubic feet of stacked wood. Where firewood is cut in 

 5-foot lengths, a cord is a stack 4 feet high and 6^ feet long, and contains 

 130 cubic feet of stacked wood. Where it is desirable to use shorter 

 lengths for special purposes, the sticks are often cut U, 2, or 3 feet 

 long. A stack of such wood, 4 feet high and 8 feet long, is considered 

 1 cord, but the price is always made to conform to the shortness of the 

 measure, 



A cord foot is one-eighth of a cord, and is equivalent to a stack of 4- 

 foot wood 4 feet high and 1 foot wide. Farmers frequently speak of 

 a foot of cord wood, meaning a cord foot. By the expression "surface 

 foot " is meant the number of square feet measured on the side of a stack. 



In some localities, particularly in New England, cord-wood is meas- 

 ured by means of calipers. Instead of stacking the wood and computing 

 the cords in the ordinary way, the average diameter of each log is de- 

 termined with calipers and the number of cords obtained by consulting 

 a table which gives the amount of wood in logs of different diameters 

 and lengths. 



