64 THE COMMERCIAL HICKORIES. 



and for thrifty trees of the same age there are no differences in value 

 according to geographic regions or local soil conditions. Strength 

 and toughness ace not affected by the change from sapwood to 

 heartwood. The best criterion of the value of the wood is its weight. 

 To help prevent shortage in the supply, hickory users should take 

 action to prevent waste through placing red hickory upon an equal 

 footing with the white, to secure economy in usage through closer 

 cooperation, and to improve the economic position of the tree 

 through the adoption of a just log measure. 



