Disc Designation. 



Fiber Length, mm. 



over 5.00 



4.00 to 

 5.00 



1 . 00 to 

 4.00 



37*75 in.. 



Annual Ring Designation. 

 Intervals 20 Years. 



X indicates location of maximum fiber in disc. 



+ indicates point of longest average fiber in disc. 

 O indicates point of longest average fiber in ring. 

 indicates limit of wood over about 50 years from pith. 



Fig. 1. — DiAGR.\M of Longitudinal Section of Ship. 2, Tree 1, Showing Location 

 OF Discs and of Points Where Fibers Were Measured. 



