Sage O” xia eee nee 
Vol. VIIL, No. 8.] Seasoned and Unseasoned Teak-wood. 307 
[NV.S.] 
ticed the formation of these crystals in a similar way and also 
as a sublimate when the resin was melted and allowed to vola- 
talize. In order to get the crystals in the latter way *4 gram 
of the resinous substance from old teak-wood was taken in a 
dry test tube, heated on an oil bath gradually to 200°, and kept 
at that temperature for 30 mins. A white sublimate was 
found to consist of regular prismatic crystals; but the quan- 
tity of the crystalline product obtained either way was very 
small 
As the crystals were conspicuously absent in the resin 
from fresh wood, it was evident that they were formed by 
J 
of seasoning of the wood from which the resin was obtained. 
An attempt was therefore first made to separate the crys- 
talline substance from the resin. But following Romanis’s 
directions (loc. cit.) for the separation of the crystalline sub- 
stance from the tar obtained by the destructive distillation of 
teak-wood, it was found that caustic soda would not extract 
any crystalline substance from the resin. 
e gram of the resin was next extracted with a compara- 
tively small quantity of chloroform, when about 80% of it was 
dissolved. The chloroform solution was filtered and shaken 
up first with an excess of a solution of sodium carbonate and 
then with one of caustic soda, but neither of the reagents was 
found to éxtract anything from the chloroform solution. That 
part of the resin which was difficultly soluble in chloroform was 
brownish white in appearance and rather easily soluble in 
caustic soda. Onacidificationit gave a brown precipitate which 
could not be crystallized. It was therefore concluded that 
that part of the resin which was soluble in caustic soda was 
not easily solubie in chloroform, and conversely that the part 
soluble in chloroform was not appreciably soluble in caustic 
soda, and further that the separation of the crystals from the 
resinous substance could not be effected in the way described 
above 
It was found however that the crystals could be separated 
by subjecting the resin to steam distillation. 1:2 gram of the 
resin from old teak-wood was subjected to steam distillation 
with 100 c.c. of water in a 500 c.c. flask. The distillate was 
cloudy and contained a white, fatty-looking substance, which on 
examination was found to consist of clusters of beautiful, needle- 
shaped crystals. About 500 c.c. of the distillate was collected 
and shaken up with a small quantity of ether, which dissolved 
the whole of the solid substance leaving the aqueous solution 
completely colourless. The ethereal solution was se arated 
and allowed to evaporate slowly in a glass dish, when the solid 
