Ii6, THE PRINCIPAL SPECIES OF WOOD. 



Teak. Tectona grandis. 



Nomenclature. 



Teak. Teek. 



Indian Oak. Sagwan. 



Locality. 



India, Burma, Siam, Ceylon. 



Features of Tree. 



Eighty to one hundred feet in height, three to four feet in 

 diameter, sometimes larger. Straight trunk, large drooping 

 deciduous leaves. 



Color, Appearance, or Grain of Wood. 



Variable, brownish-yellow, straight, even-grained. 



Structural Qualities of Wood. 



Moderately hard, strong, easily worked, stands well, oily, 

 fragrant, resists termites, preserves iron. 



Representative Uses of Wood. 



Furniture, ship-building, timbers, backing for armor-plates. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 

 50 (Laslett). 



Modulus of Elasticity. 

 1,338,000 (Lazlett). 

 2,100,000 (Thurston). 



Modulus of Rupture. 

 15,000 (Thurston). 



Remarks. 



The oil is thought to preserve iron and repel termites. Burma, 

 Malabar, Rangoon, and other teaks take names from districts 

 producing them. The distinct African teak (Oldfieldia afri- 

 cana) affords wood sometimes marketed as African mahog- 

 any and sometimes as African oak. (Forestry methods, see 

 " Burma Teak Forests," Sir Dietrich Brandis, "Garden and 

 Forest," Vol. IX, "Forestry and Irrigation," Vol. IX, No. 3, 

 P- J 39-) 



