49 
Eucalyptus citriodora, Hooker. ; 
Of Queensland, combines with the ordinary qualities of many Eucalypts 
the advantage of yielding from its leaves a rather large supply of 
volatile oil of excellent lemon-liko fragrance. 
Eucalyptus diversicolor, F. v. Mueller. 
The Karri of S. \V. Australia, A colossal tree, exceptionally reaching 
to the height of 400 feet, with a proportionate girth of the stem. The 
timber is excellent. 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 avenues. In its native localities it occupies fertile, rather humid 
valleys. 
Eucalyptus globulus, Labill. 
Blue Gumtree of Victoria and Tasmania. This tree is of extremely 
rapid growth and attains a height of 400 feet, furnishing a first-class 
wood ; shipbuilders get keels of this timber 120 feet long ; besides 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 carried 14 lbs. weight more than the 
Oak and 1 7 lbs. 4ozs. more than Teak upon the square inch. Blue Gum 
wood, besides for shipbuilding, is very extensively used by carpenters 
for all kinds of out-door work, also for fence rails, railway sleepers_ 
lasting about 9 years,—for shafts and spokes of drays, and a variety of 
other purposes. 
Eucalyptus go'mphocephala, Candolle. 
The Tooart of S. W. Australia ; attains a height of 60 feet. The wood 
is close-grained, hard and not rending. It is used for shipbuilding, 
wheelwright's work and other purposes of artisans. 
Eucalyptus marginata, Smith * 
The Jarrah or Mahogany tree of S. W. Australia, famed for its inde¬ 
structible wood, which is attacked neither by Chelura nor Teredo noi 
Termites, and therefore so much sought for jetties and. other structures 
exposed to sea-water, also for any underground work, and largely 
exported for railway sleepers. Vessels built of this timber have been 
enabled to do away with all c. pperplating. It is very strong, of a close 
grain and a slightly oily and resinous nature; it works well, makes a 
fine finish, and is by shipbuilders here considered superior to either 
Oak, Teak, or indeed any other wood. The tree grows chiefly on iron¬ 
stone ranges. At Melbourne it is not quick of growth, if compared to 
our Bluo Gum {Sue. globulus, Lab.) or to our Stringybark (A. olligua 
l’tier.), but it is likely to grow with celerity in our ranges. 
Eucalyptus rostrata, Schleobtendnl. 
The lied Gum of Victoria, South Australia, aud many river flats in the 
interior of the Australian continent, although a native tree of this 
colony, it has been introduced into this list on account of its wood 
being of extraordinary endurance underground, and for this reason so 
highly valued for fence-posts, piles, and railway sleepers ; for the latter 
purpose it will last at least a dozen years, and, if well selected, much 
longer. It is also extensively used by shipbuilders — for maiu stem, stern 
post, iuner post, dead wood, floor timbers, futtocks, transomes, knight 
head, hawsepieces, cant, stern, quart- r and fushiou timber, bottom 
planks, hreasthooks and riders, windlass, howrails, &c. It should bo 
steamed before it is worked for planking, Next to the Jarrah from 
West Australia this is the best wood for resisting tho attacks of sea- 
worms and white ants. For other details of tho nses of this arid other 
native trees refer to the Reports of the Victorian Exhibitions of 1862 and 
