5 
designation of “ White-top.” The outer hark of this tree is fibrous and eloselv 
matted, forming, if I may make the comparison, a sort of middle link between 
such fibrous-barked trees as the Stringybarks and such smooth ones as our White 
Gum. I do not know that the term “ black,” as applied to the butt, is particularly 
appropriate ; the word “ grey ” would be better, though exception could be taken 
to this adjective also. 
Aboriginal Names. —“Yarr-warrah ” of the Illawarra blacks, according to 
the late Sir William Macarthur. Another New South Wales aboriginal name was 
“Benaroon.” By the aborigines of South Queensland it was known as “Tclieergun” 
and “Toi.” 
In a collection of specimens made by George Caley are two twigs which 
belong to this species, and which are labelled as follows by him, Tarundea being 
the aboriginal name:— (a) “ Pilularis ? Smaller Blackballed Gum. Tarundea, Feb. 
15, 1805.” (b) “ Great Blackbutted Guoi with large capsules. Tarundea, Jan., 
1808.” 
Leaves. —The oil has been described by Messrs. Baker and Smith in the 
“ Research on Eucalypts ” as follows :— 
Whence collected 
for Oil. 
Specific Gravity 
at 15° C. 
Specific Rotation 
M... 
Saponification 
Number. 
i 
Solubility in 
Alcohol. 
Constituents 
found. 
Canterbury, 
Bel more, Cur- 
rawang Creek. 
0-885 
to 
0-903. 
-4-8° + 12-3° 
but first fraction 
always 
lsevo-rotatory. 
5-9 
1 7 vols., 80% to 
insoluble. 
Phellandrene, 
pinene, 
sesquiterpene, 
alcohols. 
Note the pale underside of the leaf. 
Bark .—Has fibrous bark on the butt, while the branches are smooth, like 
those of a gum. 
Timber. —Pale-coloured, more or less fissile, though sometimes quite inter¬ 
locked in grain. It is a strong, durable, thoroughly safe, and well-tried timber. It 
is usually readily diagnosed by the presence of narrow, concentric gum-veins, but 
sometimes these gum-veins are nearly or wholly absent. As a rule they are too 
narrow to cause deterioration. Sometimes, particularly on the Northern Rivers, it 
is free from gum-veins, and then presents considerable similarity to Tallow-wood 
(E microconjs ), for which it is occasionally substituted. It occasionally, though 
rarely, shows pin-holes. 
It is one of the best hardwoods we have for house and ship building. It is 
useful for bridge-planking, though inferior to Tallow-wood for that purpose. It has 
been tested for many years for blocks for wood-paving, with most satisfactory 
