EXOGENOUS SERIES-BROADLEAF WOODS. 15 



Chestnut Oak. Quercus prinns Linn. 



Nomenclature. (Sudworth.) 



Chestnut Oak (local and com- Tanbark Oak (N. C.). 



mon name). Swamp Chestnut Oak (N C ) 



Rock Oak (N. Y., Del., Pa.). Mountain Oak (Ala.). 

 Rock Chestnut Oak (Mass., 

 R. L, Pa., Del., Ala.). 



Locality. 



Maine to Georgia, westward intermittently to Kentucky and 

 Alabama. Best development in southern Alleghany Mountain 

 region. 



Features of Tree. 



Seventy-five to eighty feet in height, three or four feet in 

 diameter. Leaves resemble those of chestnut. 



Color, Appearance, or Grain of Wood. 



Heartwood dark brown, sapwood lighter, close-grained, medullary 

 rays conspicuous. 



Structural Qualities of Wood. 



Heavy, tough, hard, strong, and durable in contact with soil. 



Representative Uses of Wood. 



Largely used for railway ties. Bark rich in tannin. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



46. 

 Modulus of Elasticity. 



1,780,000. 

 Modulus of Rupture. 



14,600. 



Remarks. 



Prinus is a Greek name applied to a species of oak, 



