EXOGENOUS SERIES-BROADLEAF WOODS. 131 



Jarrah. Eucalyptus marginata. 



Nomenclature. 



Jarrah (local and common name). 

 Mahogany Gum (Australia). 

 Locality. 



Western coast of Australia. Some specimens acclimated in 

 California. 



Features of Tree. 



Ninety to one hundred or more feet in height, two to five feet 

 in diameter. Fifty or more feet to lowest branch. Dull, 

 sombre appearance. Branches concentrated at top. Few 

 California specimens are over thirty feet in height. 

 Color, Appearance, or Grain of Wood. 



Reddish, resembles mahogany, also Kauri wood. 

 Structural Qualities of Wood. 



Heavy, non-absorbent, somewhat oily, durable in contact with 

 the soil, receives good polish. Characteristic odor, wears 

 thin evenly, not easily inflammable. Said to repel teredo and 

 termite. 



Representative Uses of Wood. 



Marine work, exposed positions, ship-building, bridge timbers, 

 street-paving (London and Paris). 



Weight of Seasoned Wood in Pounds per Cubic Foot. 

 65 (Ednie-Brown).* 



Modulus of Elasticity. 



2,080,000 (Ednie-Brown).* 



Modulus of Rupture. 

 8900 (Ednie-Brown).* 



Remarks. 



Chief timber tree of southwestern Australia. Often confused 

 with Karri. Muller calls it the least inflammable of woods. 

 Marginata refers to thick-edged leaves. 



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



The Red Mahogany (Eucalyptus resinifera) has very limited local ranges. 

 The hard, heavy, durable, rich-red wood resembles mahogany and is used for 

 shingles, posts, piles and pavings. It can be used in furniture. 



Manna Gum (E. viminalis) grows very rapidly, but the wood is not as 

 serviceable as that from Blue Gum. Red Gum and Blue Gum are likely to grow 

 wherever the Manna gum will grow. 



The Victoria Stringy-bark (E. macro rhyncha) has a thick, dark-gray, fibrous, 

 durable bark that is used in Australia for roofing out-buildings; strings are 

 obtained from it. The hard, durable wood is used for lumber, shingles and fuel. 



