0 Se epee LAP ES erd Re 8 
AUSTRALIAN VEGETABLE EXUDATIONS. — 403 
of the powder being a dark pink. It was apparently very liquid 
when exuding, as the adherent wood and bark are varnished with 
it. It burns with a very smoky flame, resembling ordinary resin 
in this respect, and burns away almost without residue. When 
treated with ether the resin slowly dissolves, forming a lemon 
coloured solution. The powder acts in a very peculiar manner in 
ether, agglutinating itself at once into an elastic ball which can 
be stretched in the same way as caoutchouc, thus preventing the 
solution of the resin in the interior portions. In rectified alcohol 
the resin goes into solution, forming a bright orange coloured 
liquid, the residue not agelutinating. When the resin has been 
removed and the residue dried, it powders readily to a light brown 
colour. The resin is of an orange brown colour. 
The gummy portion, after thoroughly washing with alcohol, is 
much swollen and somewhat elastic. When dried until of con- 
stant weight it was found to amount to 20-02 per cent. of the 
whole. The original substance in powder on being heated in an 
oven until of constant weight, 2°14 per cent. was lost ; this was 
Probably moisture contained in the gummy portion, as no volatile 
oil appeared to be present. The resin when evaporated to dry- 
hess and heated till of constant weight equalled 77-2 per cent, 
While the ash only amounted to -2 per cent., so that the proximate 
Constituents may be stated as 
meth thc: ... 77:20 per cent. 
Gummy substance? 20-02 
Moisture, etc. ... 214 y 
Ash deh vane ‘20 ” 
99-56 
: The gummy portion contains some albuminoids, as indicated by 
‘Presence of nitrogen. The dried portion after separating ie 
— 18 not soluble in water on boiling in any degree ; when boiled 
a = dilute soda it becomes brown, but only a small portion goes 
to solution, nor is it soluble in dilute acids. From the above it 
