42 
The resins of the grass-trees give an instance of this. Not oe f 
4 
compound of the Xanthorrheea resin is to be found inside of the bark 
of the stem, or inside of the cuticula of the leaves, or in the tissue of 
the flowers or fruits. The resin seems to be derived from Xanthorrhea 
tannin, but the way in which this is turned into the resin is up to the 
present date altogether enigmatical. 
HARD RESINS, DISSOLVED IN KOH WITH STRONG 
COLOURATION. os 
Xanthorrhea arborea, R. Br. Fl. Austr. vii, 115.  Grass-tree. — 
i 
conical piece of wood in the basal part of the stem. 
All the cells of this tissue are crammed full of needles of ea : 
of lime about 4 micromillimetres long and very thin. ach ae 
contains about 60 needles. Here and there rhombic plates of a 
see nelk (examined by microscopical reagents) take the place of #? 
es. j 
As no plant on the whole earth is known to contain mg a 1 
umber of rhaphides; and as the grass-tree resin 4 
: ; ; between the beat | 
least partly due to styrol. This substance, called aiso 
C,H;), was obtained by me, on distillation at a very mo 
from fresh grass-tree resin. Found by Stenhouse as eat y 
was not recogni t yrol Still it gives wl h HN 0, 
of nitro-styrol easily observable under the microscop ticed. AR? 
ic 
get sticky bef lting. flame and 
‘Slonsent isinteice melting It burns with a smoking glkalie® 
