TANS. 325 
acid. ‘These leaves were previously dried at 100° C., as usual. 
Mueller and Rummel found 4.68 per cent of tannic acid in the 
“fresh leaves.” Making allowance for moisture, the results closely 
approximate. 
In all the colonies. 
70. Eucalyptus siderophloia, Benth. (Syn. Z. resinifera, A. 
Cunn., non Smith; Z. persicifolia, DC.; and prob. £. 
fibrosa, F.v.M.) ; N.O., Myrtacez, B.FI., iti., 220. 
“Tronbark.” (For other vernacular names, see ‘‘ Timbers.’’) 
This bark, which contains more or less kino disseminated 
through it, is occasionally used for tanning. Sometimes the 
Sydney fishermen use it for tanning their sails and nets, but it 
discolours them. 
At p. 193 (Proc. R.S., N.S.W., 1887) the author describes 
an examination of the bark of a sapling of this species. The bark 
differs from that described (Joc. cit., p. 39, see “Kinos”’), in 
containing but traces of kino visible to the naked eye, and con- 
sisting of the whole thickness of the bark. The complete difference 
will be apparent from the following description of the bark now 
referred to. Itreminds the author very strongly of virgin cork, more 
sO, in fact, than any other specimen of Eucalyptus bark examined 
by him up to the present time. It is deeply fissured, light 
(though not quite so light as cork bark), and these particular 
specimens certainly might be used as floats for fishermen’s nets. 
It is very soft and elastic, and can easily be indented, and even 
torn away by the finger-nail. In a word, it is simply inferior cork. 
Its outer surface has nothing of the hardness characteristic of Iron- 
barks, though it possesses their rugged, furrowed appearance. 
Prevailing colour, light grey. The corky portion is readily detach- 
able, and about an inch in thickness. It yields 14.2 per cent. 
of extract, and 6.702 per cent. of kino-tannic acid. Leaves of this 
yielded (Joc. cit., p. 269) 22.93 per cent. of extract, and 5.95 per 
cent. of tannic acid. 
Southern Queensland, south to Port Jackson. 
71. Eucalyptus Sieberiana, v.47. (Syn., £. virgata, Sieb:) ; 
N.O., Myrtacez, B.FI., iii., 202. 
