44 
tom the grass-tree resin, after having been shaken with the one 7 
more turned golden by addition of KOH. It got pink now (like) 
B 
° 
= gs 
a 
3 
} 
to 
° 
+ 
B 
on 
oft 
> 
a 
© 
° 
Bb 
io) 
ie 
ol 
r=] 
N 
ei 
° 
a) 
c. 
a 
sd 
= 
® 
= 
5 
ct 
Es 
= 
2 
this case on ferric salt, alkaloids, and gelatine). Ferric sce 
more produced a brown precipitate, and gelatine and sulp 
cinchonine were added without turbidity. cae 
Infusion of grass-tree gum acts very peculiarly on eae 
chloroform. If a few drops of this are added, crystalline Ls pe 
seen to fall out of the watery liquid and to settle just on t ge : 
of the chioroform. Some of them are rounded, and loo Bre 
seythe-stone under the microscope. They behave to ferric $ skp 
KOH like those taken up by ether, which dissolves them _- re 
They can be sublimated without decomposition, and they rep We might 
yellow dyeof natural origin contained in the grass-tree resin. ae 
it Xanthorrheaxanthin. It is derived from the bags: Lge 
leaves, like the yellow colouring princi ples—-Qneramy tia (from 
: tter 
crimson. A vegetable dye nearly related to the colourmg ™@ 
the grass-tree resin was Found by me in the gums of pore: bark 
australe (also in the bark), Ceratopetalum gummiferum, and in 
The tannin contained in the grass-tree leaves is stained Bae : 
. Copper acetate gives & slight sia ri 
oids are not precipitated by it. Gelatine gives a dense yh “ble i 
alcohol, and there stained brown by KOH and HSV, | treated with 
the watery infusion of the X. arborea resin 18 se melting 
acetic ether, beautiful crystals of benzoic acid are taken out, pensole 
on application of heat, and erystallising again on cooling. and 
acid present in the resin can be weighed directly by this pr | 
I found it to be contained in fresh resins at 5-6 per cent. i 
‘4 
and bleaching powder. > pict a 
__ From 20 grams of grass-tree resin I obtained 5 grams rio | 
acid in the following manner :—20 grams of the powders. a recelteh . 
