SPECIES OF WOODS. 



69 



O.G'JfJiJ; very strong (7th in this list); 

 very elastic (4th in this list) ; hardness, 

 medium (33d in this list) ; shrinkage, 

 4 per cent; warps very little; quite 

 durable; works hard, tough; splits 

 badly in nailing. 



Common Uses: .Joists, beams, bridge 

 and building trusses, interior finish, ship 

 building, and general construction work. 



Kemarks: Almost exclusively the 

 source of turpentine, tar, pitch and resin 

 in the United States. Known in the 

 English market as pitch pine. 



Radial Section, 

 life size. 



Cross-section, 

 magnified 37l-^ diameters. 



Tangential Section, 

 life size. 



