Se 
ntains 80 per cent. of tannin by 42 of arabin. It was not 
id. 
62 ag 
E. ae F. vy. M., Fl. Austr. iii. 221. Narrow-leaved Ironbark. 
This gum ¢ ; 
tested i allie acl 
busta, Sm., Fl, Austr. iii. 228. Swamp Mahogany Gum. : 
my a 
Only 99:5 of tannin with 41 per cent. of arabin was found in 
Queensland sample. 
E. saligna, Sm., Fl. Austr. iii. 245. Grey Gum. My sam 
=— i Loewenberg’ s method, gave 28°4 per cent. of tannin aby Ps 
of arabin. 
B.—GumMs or tHE Rusy Group. 
The gums of this group contain about 5-6 per cent. ee arabin, 
which is mostly present as metarabin. It settles to the bottom with 
i urities i | eS 
oh 
oa 
oo 
— 
™m 
fae) 
ic} 
mm 
jc 
*< 
Qu 
~ 
77) 
2 
° 
pry 
4 
@ 
Ru 
ag 
| 
ie] 
i) 
=] 
7) 
cr. 
© 
i 
° 
e 
‘7 
=) 
B 
Qu 
mee 
a 
3 
» The colouring ee soe agrees with that of the gummy group. 
Especially cyanide of m gives a beautiful yermilion, and ferrie 
acetate a delicate blue Scanicn in very diluted gum solutions. 
The tannin is identical with that of the gummy group and with 
that of Lonchocarpus Blackii and Millettia megasperma 
oa acid was found in the gum of JZ. Lowastona at 13 
per cen 
Eucalyptus hemastoma, Sm., F). Austr. iii. 212. Scribbly Gum 
ANALYSIS— 
— ati — 
tarabin ith i I se ve 
Tannic acd with sl she ses vas | oe 
Gallic acid E: cae eet. 
Topeaitiee a 54 
100°0 
E. acmenioides, Schau., Fl, Austr. iii, 208. Stringybark. 
ANALYsIS— : 
vee and Sa see = 
acid « ith’ ia oF : a 
Tanniii with soluble plaka phidtapine eee 
Gallic acid a coo ee 
‘buputitiee a ee a a a eee 
100°0 
Similar to Eucalyptus hemastoma gum are the gums oe 
pilularis, Sm. Satay (65 per cent. tannin, 5°7 mete B. ake 
mo Sm. , Blu m (62 per cent. tannin, 7 per 
se gums were a examined for gallic acid aie : 
ear to the gum of EF. acmenioides a3 the gums of E. eugene 
Sieb., Heten dee (tannin 65, metarabin 7 per cent.) ; Z. piP. pane 
Sm., Stringybark (66 per cent, tannin, 11 per cent. ‘metarabin); & 
P vanchontond, F. v. M. (68 per ese tannin, 6'4 metarabin). 
acid, 5 
: The percentages come as near as aasle. . Mr. sors ; oe 
which are hygroscopic, and co more 
aeieeting to the state of the atmos 
