54 



THE COMMERCIAL HICKORIES. 



the loss through shakes and grub holes in many cases amounts to 

 as much as 50 per cent. 



TABLE 17. Comparison of strength and toughness of northern and southern hickories of 



the same age. 



Specific 



gravity 



dry. 



0. 621 

 .637 



TABLE 18. Summary of static bending tests of various hickories from several localities. 



