Bark.
This is called "Grey" and "Black Wattle" near Sydney, "Silver Wattle" and "Sally" near Gosford, but dealers will not have it, and it hardly pays to cut up and pass with better bark. A sample of a black bark, stained, leopardlike, with whity-green patches, and bearing lichens, yielded the writer 18.03 per cent. of tannic acid and 42.35 per cent. of extract. It was from Penrith, N.S.W.
A sample from Penshurst, Illawarra line, near Sydney, gave the author (Proc. R.S. N.S.W., 1888, p. 269) 39.98 per cent. of extract and 14.42 of tannic acid. Eeight of tree, 10 to 15 feet; diameter, 1 1/2 to 2 inches; collected September, 1887; analysed August, 1868. A light-coloured bark, very thin, of the thickness of stout brown paper, and reminding one strongly of that of A. longifolia.
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A very promising-looking bark obtained from the same locality in February, and analysed the same month, gave 19.75 per cent. of tannic acid and 46.95 per cent. of extract. It is fairly thick, pale in colour, has little fibre, and its low percentage of tannic acid is certainly disappointing. I doubt whether a finer sample of this bark is obtainable; if this surmise is correct, the value of this bark is fixed at under 20 pet cent. of tannic acid.