50 
probably Westerberg’s amyrin. 
. Amorphous resin, easily soluble in alcohol, and perhaps 
identical with the colophony of turpentine. ; | 
Crystallised resin, identical with Baup’s elemin, melting | a 
200 degrees C., and not easily dissolved in benzol, but soluble in 20 
parts of alcohol of 88 vol. 5a 
As to the commercial value of the resin, it must be stated that itis 
the best substitute for elemi, and that it is a very good healing agent 
for cuts, sores, and chronic ulcers, as it has been proved by exper 
ments 
. 
- 
is 
Pittosporum undulatum, Vent., Fi. Austr. i. 111. Mock 
is end 
Mr. Maiden remarks, has a delicious odour. Tt dissolves aime 
entirely in alcohol, ether, chloroform, benzol, and the essential oils, 
but sometimes up to 17 per cent. of metarabin are left. 
On application of heat a colourless volatile oil is distilled off, 
oating on water and reminding one of the smell of the flowers.“ 
resin left behind is hard and nearly colourless. Its alcoholic solution | 
: : , owing to 
is not affected by ferric salts, but is stained yellow by pai” Xan- 
NaOH,NH,OH) and ammon,. molybdate in HNO,, golden yon 
antimon. tartar with NH,Cl. no reaction; copper acetate Wit" 
HCO, no reaction; uran. acetate light-brown. Does not cong 
gelatine but precipitates sulphate of cinchonine, resembling 12 * 
respect the yellow colouring matter of Xanthorrhwa 
.. . . 3 W : 
e gum present at times (metarabin) contains the same yello : 
dye and is stained golden by KOH. : | 
ANALYSIS— . 2 
A. Volaileoill ., .2 128 B, Volatileoil «= = 
Hard resin .. $42 Hard resin ee i 
Metarabin 25 . : ua 
99°5 99°9 
_ Grevillea striata, R. Br., Fl. Austr. vy. 462. Beefwood. 
resin of this endemic Australian tree has been described pe 
Maiden as quite free from odour and of a dark reddish-brow? 4, 
It has a bright fracture, but softens by the warmth of the eee 
which it adheres. It melts at 70° C., but does not at first get tous" 
/ 
