SPECIES OF WOODS. 



167 



Physical Qualities: Heavy (12tli in 

 this list), 45 lbs. per cu. ft.; sp. gr., 

 0.733.3; yerv strong (1st in this list); 

 elastic {9th in this list); veiy hard 

 (6th in this list) ; shrinkage, 5 per 

 cent. ; warps badlv, very durable ; hard 

 to work, tough : splits in nailing. 



Common Uses: Shipbuilding, con- 

 struction, '"tree-nails" or pins, wagon 

 hubs. 



Remarks: Widely planted and cul- 

 tivated east and west. Likely to he in- 

 fested with borers. 



Radial Section, 

 lite size. 



Cross-section, 

 magnified 37^2 diameters. 



Tangential Section, 

 life size. 



