QUEENSLAND NATITE ASTRINGENT MEDICINES. 
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ammonia, and giving blue colouration with ferro-sulpllate, showing that 
it has nothing in common with kino-tannic acid. The phlobaphene 
obtained by boiling with hydrochloric acid is dissolved by borax with 
the same pink colouration as the kino-red. Still it is not identical with 
it, as is easily proved by the reaction with ferric salts. Besides 
that, kino-red dissolves only slowly in alcohol or alkalies, whereas 
Angophora-red is dissolved by those reagents very quickly. The 
phlobaphene behaves to reagents, if dissolved in alcohol, just as the 
Angophora-tannin does. 
Angophora gum dissolves in boiling water to about 65 per cent. 
A residue of 35 per cent, settles to the bottom after cooling. Some 
chemists called this residue “ catechin,” of course without looking at 
it, because any schoolboy can see that it is not catechin. It consists — 
(1) For the most part of ellagic acid ; 
(2) Of a small amount (1-1’5 per cent.) of a resinous 
matter taken out of the residue by benzene, and stained 
blue-black with ferric acetate after continued washing ; 
(3) Of a small amount of metarabin (1-2 per cent.) only, 
dissolved in hot solution of caustic potash ; 
(4) Of bark and impurities. 
An alcoholic solution of Angophora gum has a bright colour; and gets 
at once opalescent if diluted with water. It brightens up again when 
KOH is added. The fluorescent matter falls only out by addition of 
HC1, and swims to the top of the solution. It is nothing else but 
the small amount of resin and of ellagic acid which was dissolved in the 
alcohol. It is stained bluish by ferric salts. If chloroform is added 
to the opalescent liquid, it takes all ellagic acid up, and the bright 
solution swims on the top of the chloroform. The smell of the gum 
of Angophora lanceolata is due to a very small amount of an essential 
oil which resembles most the oil of camomile. 
Angophora suhvelutina , F. v. M., one of the apple-trees, grows 
plentifully on the Logan, near Waterford, and gives out a brittle 
reddish gum much used by settlers as a medicine for diarrhoea. Put 
in cold water it becomes whitish, some portion of astringent matter 
(Angophora-tannin and ellago- tannic acid) is dissolved, and a bulky 
whitish powdery substance subsides, winch consists for the most part 
of ellagic acid. 
Angophora intermedia , DC., and A. Woods iana, Bail., agree in all 
respects closely with A. lanceolata . 
The medicinal value of the Angophora gums must not be under- 
rated. Of a 10 per cent, solution 6 oz. or 8 oz. may be given for 
diarrhoea in twenty-four hours. In the stomach the ellago-tannic acid 
is precipitated first and causes vomiting sometimes, but, if the stomach 
bears it, it is dissolved as well as the ellagic acid by the pancreatic 
juice and by the secretions of the intestinal tract. In this way it 
reaches sick parts of the lower bowels better than stronger gums. 
By different methods, including LowenthaTs process, I found all 
the Angophora gums to contain about 40 per cent, of tannates soluble 
in water, and still they are better remedies for diarrhoea, especially for 
chronic forms of diarrhoea, than the gums of the ruby group. For 
