T I M 



If G as well as L be in feet, 



.03 L G 2 cubic feet true content. 



Sometimes a certain allowance is made in girting- a tree for the thick- 

 ness of the bark, which is generally one inch to every foot in girt, or 



j of the whole girt ; in that case, 



L G 2 



-r^Tj- = cubic feet customary. 



L G 2 



= cubic feot true content. 



If the tree tapers regularly from one end to the other, take half ths 

 sum of the girts at the two ends for the mean girt. If the tree do not 

 taper regularly, but is unequal, being thick in some places and small in 

 others, it is usual to take several different dimensions, the sum of which 

 divided by the number of them is accounted the mean girt. But when 

 the tree is very irregular, it is best to divide it into several lengths, and 

 to find the content of each separately. That part of a tree, or of the 

 branches, whose % girt is less than J a foot, is not accounted timber. 



TIMBER, on the strength and stress of. See Elastic bodies, equilibrium, 

 of. 

 TIME, equation of. See Equation ofTimo. 



TIME, various tables relating to.( Vince.) 



TABLE L 



For ccnverting degrees, minutes, and seconds into sidereal time. 



