‘67 
ANALYSIS of the inspissated juice— . 
Water; —..: pa ee cee 187 
Arabin ... oa eck wie > aba hues glee 
Tannin (derived from protocatechuic acid)... 76°8 
arabin precipitated from the solution by alcohol without addition of 
acid or “oni It is not coagulated by ferric salts, but faintly stained 
em 
: e watery solution of the gum has a strong blue fluorescence 
eractly like the esculine from the bark of Aiseulus Hippocastanum. 
fuorescence is destroyed by slight acidulation, and recovered by 
heutralisati 
llow by KOH, whereas the tannin of C. tomentosum gets pink 
. KOH, 
N20H, NH,OH produce a magnificent pink colouration ; cyanide of 
: per m 
molyh ra Uranium acetate and CuSO, give a light-brown ; ammon. 
‘ pink-} Teaction, and ferri-cyanide of potassium in ammonia 
~br 
; —. albumen of eggs, and alkaloids. It yields a red phlobaphene 
| aos with dilute HCl. 
: YS. 
OR as 18% 
i i vi * ove 
eo ee 
Fluorescent body Sow we oo 
2 100°0 
This thecarpus Biackii, Benth., Fl. Austr. ii. 271, Bloody-bark. 
: sia dries up to a brownish gum resembling the 
a of te. Still, 
ee : Siderophloia : 
> There is not more than 4 per cent. of arabin present in the gum, 
3 i" by aleohol on standing. ‘ ees 
decpoti  &Kes a still smaller proportion of a resin out of the _ y 
‘epost Which is held suspended in it like in an emulsion. ae 
the ether on & watch-glass in concentric rings after the = 
‘apgtte colourin -; gives the same reactions 
WS that g phlobaphene of L. Blackii gives the 
Mt riby ge gum of Millettia and as the Bucalypt gums of the gummy 
Le oe 
. 
