164 THE PRINCIPAL SPECIES OF WOOD. 



Great Silver Fir, White Fir. Abies grandis LinJL 



Nomenclature. (Sudworth.) 



Silver Fir (Mont., Idaho). Yellow Fir (Mont., Idaho). 



Oregon White Fir, Western Lowland Fir. 

 White Fir (Cal.). 



Locality. 



Vancouver region, northwestern United States. Best in west 

 Washington and Oregon. 



Features of Tree. 



Two hundred to sometimes three hundred feet in height, two 

 to five feet in diameter. Leaves deep green above, silvery 

 below, usually curved. A handsome tree. 



Color, Appearance, or Grain of Wood. 



Heartwood light brown, sapwood lighter. Coarse-grained, com- 

 pact structure. 



Structural Qualities of Wood. 

 Light, soft, not strong. 



Representative Uses of Wood. 



Lumber, interior finish, packing-cases, cooperage. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



22. 

 Modulus of Elasticity. 



1,360,000. 

 Modulus of Rupture. 



7000. 



Remarks. 



Forms important part of local mountain forests and furnishes 

 much lumber locally. Best on rich bottom lands, but found at 

 altitudes of five thousand and six thousand feet. The balsam 

 secreted in blisters on young bark is used in medicine. 

 Grandis refers to the great stature of the tree. 



