142 THE PRINCIPAL SPECIES OF WOOD, 



Bull Pine, Yellow Pine, Western Yellow Pine. 



Pinus ponder osa Laws. 



Nomenclature. (Sudworth.) 



Big Pine. Heavy-wooded Pine. 



Longleaved Pine. Western Pitch Pine. 



Red Pine. Heavy Pine (Calif.). 



Pitch Pine. Foothills Yellow Pine. 



Southern Yellow Pine. Montana Black Pine. 

 Locality. 



Rocky Mountains, westward intermittently to Pacific Ocean. 



Features of Tree. 



One hundred to sometimes three hundred feet in height, six 

 to sometimes twelve feet in diameter. Thick, deeply furrowed 

 bark. Leaves in tufts of threes. 



Color, Appearance, or Grain of Wood. 



Thin heartwood is light red, sapwood nearly white. Rather 



coarse grain, compact structure. 

 Structural Qualities of Wood. 



Variable, heavy, hard, strong, brittle, not durable. 



Representative Uses of Wood. 



Lumber, railway ties, mine timbers, fuel, etc. 



Weight of Seasoned Wood in Pounds per Cubic Foot 



29. 

 Modulus of Elasticity. 



1,260,000. 

 Modulus of Rupture. 



10,200. 



Remarks. 



Ponderosa, signifying " heavy," refers to great size. 



