LOG RULES IN USE, BASED ON CUBIC VOLUME 



29 



equivalent to 25.6 cubic feet. In application the log is measured at 

 the small end and its contents are taken as that of the corresponding 

 small cylinder. The taper is disregarded. 



When D = diameter of standard log in feet or in inches; 

 L — length of standard log in feet. 



The volume of the standard is .7854 D 2 L. 



Let d and I equal the diameter and length of any other log, whose 

 volume will be .7854 d 2 l. 



The volume of any log is found in terms of standard units by the 

 formula, 



.7854rf 2 Z d 2 l 

 ~ .7854Z) 2 L~ D 2 L' 



The market is still a common standard of log measure on the 

 Hudson River watershed in the Adirondack region. 



Its neglect of the taper makes the Adirondack standard unsuitable 

 for measurement of pulp wood, but were it applied at middle of log 



on the Saranac river drainage in New York, termed the Twenty-Two-Inch Standard. 

 The standard log is here 22 inches at small end, and 12 feet long, containing 31.68 

 cubic feet. It is assumed that one standard equals 250 board feet which equals 

 65.8 per cent of the cubic contents of the small cylinder. There have been still other 

 log standards, which are now obsolete. 



In principle and practice, these standards coincide closely with the use of the 



cubic meter, the only difference being in the size or cubic contents of the unit. The 



difference in shape, or use of a cylinder instead of a cubic foot, is of no significance. 



Since the cubic meter contains 35.3156 cubic feet, the market is a smaller standard. 



The cubic volumes are convertible from one of these standards to another by using 



25.6 

 the proper ratios; markets to cubic meters =.725; markets to cubic feet 25.6 



oo.ol 



