228 FOREST CULTURE AND 
a proportionate girth of the stem. The timber is ex- 
cellent. Fair progress of growth is shown by the 
young trees, planted even in dry exposed localities in 
Melbourne. The shady foliage and dense growth of 
the tree promise to render it one of our best for ay- 
enues. In its native localities it occupies fertile, 
rather humid valleys. 
Eucalyptus globulus, Labill. — Blue Gum - tree of 
Victoria and Tasmania. This tree is of extremely 
rapid growth, and attains a height of four hundred 
feet, furnishing a first-class wood ; ship-builders get 
keels of this timber one hundred and twenty feet long; 
beside this, they use it extensively for planking and 
many other parts of the ship, and it is considered to 
be generally superior to American Rock Elm. A test 
of strength has been made between some Blue-Gum, 
English Oak, and Indian Teak. The Blue-Gum ecar- 
ried fourteen pounds weight more than the Oak, and 
seventeen pounds four ounces more than Teak upon 
the square inch. Blue-Gum wood, beside for ship- 
building, is very extensively used by carpenters for 
all kinds of out-door work, also for fence-rails, rail- 
way-sleepers—lasting about nine years—for shafts and 
spokes of drays, and a variety of other purposes. 
Eucalyptus gomphocephala, Candolle.—The Tooart 
of South-west Australia; attainsa height of fifty feet. 
The wood is close-grained, hard, and not rending. It 
is used for ship-building, wheelwright’s work, and 
other purposes of artisans. 
Eucalyptus marginata, Smith.—The Jarrah or Ma- 
hogany - tree of South-west Australia, famed for its 
indestructible wood, which is attacked neither by 
chelura, nor teredo, nor termites, and therefore so 
