64 



KOUNI) TIMBER. 



EXPLANATION. First find the width in inches in the left 

 hand column, and the length in feet at the heads of the 

 other columns ; then trace the two until they meet, and the 

 figures so found will express the contents in feet and inches. 



ROUND TIMBER. 



Round timber when squared is estimated to lose one- 

 fifth ; hence a ton of round timber is said to contain only 

 40 cubic feet. 



Sawed lumber, as joists, plank, and scantlings, are now 

 generally bought and sold by board measure. The dimen- 

 sions of a foot of board measure is 1 foot long, 1 ft. wide, 

 and 1 inch thick. 



