INTRODUCTION 



There is no fundamental difference between the grading and measuring of 

 hickory trees and logs and those of other species and species groups. However, 

 bolts and billets of hickory that are produced for the handle industry or other 

 secondary industries do have specifications that are more or less unique. And, 

 in limited instances, other primary products of hickory are graded and meas- 

 ured in a novel manner. Thus the following pages include descriptive and tab- 

 ular material both of general utility and for specific application to hickory. 



MEASUREMENT OF TREES AND LOGS 



Log rules in International (|^-inch kerf), Scribner, and Doyle scales are 

 all used in estimating board- foot volumes for hickory logs. Log scaling is 

 basically unaffected by species and is not discussed herein. However, since 

 the Doyle log rule is used almost exclusively as the commercial scale through- 

 out the principal hickory-producing areas of the United States, it is presented 

 in table 1. 



Table l.-- Log scale Doyle rule -^ 

 (Volume in board-feet) 



Top 

 d.i.b. 

 (inches) 



Log length in feet 



10 



12 



14 



16 



8 



8 



10 



12 



14 



16 



10 



18 



22 



27 



32 



36 



12 



32 



40 



48 



56 



64 



14 



50 



62 



75 



88 



100 



16 



72 



90 



108 



126 



144 



18 



98 



122 



147 



172 



196 



20 



128 



160 



192 



224 



256 



22 



162 



202 



243 



284 



324 



24 



200 



250 



300 



350 



400 



26 



242 



302 



363 



424 



484 



28 



288 



360 



432 



504 



576 



30 



338 



422 



507 



592 



676 



32 



392 



490 



588 



686 



784 



34 



450 



562 



675 



788 



900 



36 



512 



640 



768 



896 



1,024 



38 



578 



722 



867 



1,012 



1, 156 



40 



648 



810 



972 



1, 134 



1,296 



jy Adapted from Schnur and Lane (8), 



- 2 



