EXOGENOUS SERIES-BR04DLE4F WOODS. 133 



j\ Tuart. Eucalyptus gomphocephala. 



Nomenclature. 



Tuart (local and common Tooart (Australia) 



T name )/ A White Gum (Australia). 



Tewart (Australia). 



Locality. 



Australia. A few specimens have been acclimated in California. 

 Features of Tree. 



One hundred to one hundred and fifty feet in height, four to six 

 feet in diameter. Lower branches forty or more feet from 

 grounJ. Bright, cheerful appearance, straight trunk, gray- 

 white bark. Californian specimens have reached heighfs of 

 eighty feet within twenty-four years. 



Color, Appearance, or Grain of Wood. 



Heartwood light yellow, compact appearance, fibres interlaced. 

 Structural Qualities of Wood. 



Very hard, heavy, strong, tough, rigid, durable, seasons well. 

 Difficult to split or work. Strength and durability are very 

 pronounced. Tuart is one of the strongest of all woods. 

 X/Representative Uses of Wood. 



Keels, buffers, stern-posts, frames, wheel-hubs, shafts. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 

 67 (Ednie-Brown).* 



Modulus of Elasticity. 



2,300,000 (Ednie-Brown).* 



Modulus of Rupture. 

 9300 (Ednie-Brown).* 



Remarks. 



Highly prized locally. One of the strongest of woods. Gom- 

 phocephala refers to peculiarities in lid of calyx-tube. 



The Red Gum (Eucalyptus rostrata) is one of the leading Australian 

 species. Baron von Mueller considered it " perhaps the most important 

 of the whole genus."* Trees are one hundred feet or more in height. 

 The wood is of a rich red color that darkens with age. It has a close, 

 complicated grain, so that it is difficult to split, and it is remarkably uni- 

 form, durable, strong and hard. Australians use it for ship-building, 

 piles, posts, paving, curbs, poles, and house blocks. It is said to resist 

 the attacks of marine life and termites. The flowers yield honey. There 

 is a ruby-red exhudation known in medicine as " kino." The young bark 

 is red, hence the name red gum. Rostratus refers to the beaked flower- 

 bud coverings. Red gum bids fair to become one of the most successful 

 eucalypts in America. 



* Report on Forests Western Australia, Presented to Parliament, 1896. 



t "It is the tree which produces directly to the Colony by far the most revenue 

 of all our trees." Jos. H. Maiden. Director Botanical Garden, Sydney, N. S. W. 



