SPECIES OF WOODS. 



71 



Physical Qualities: Weight, medium 

 (32n(:l in this list), 32 lbs. per cu. ft., 

 sp. gr., 0.0104; very strong (18th in 

 this list) ; very elastic (8th in this list) ; 

 soft (3Sth in this list) ; shrinkage, 4 

 percent; warps little ; durable; trouble- 

 some to work; likely to split along an- 

 nual rings in nailing. 



Common Uses: Heavy constriiction, 

 railroad ties, house trim, ship building, 

 cars, doeivs, biidges. 



y- 



Remarks: Wood hai'dly distinguish- 

 able from long-leaf pine. Often forms 

 pure forests. The most desirable yellow 

 pine, much less resinous and more easily 

 worked than others. 



Section, 

 size. 



Cross-section, 

 magnified 37 H diameters. 



Tangential Section, 

 life size. 



