308 Journal of the Asiatic Society of Bengai.. [August, 1912. 
substance was left behind as beautiful, white, branching needles, 
without admixture of any resinous matter. The crystals dis- 
solved in strong H, SO, and H NO, with a yellow colour and 
on dilution came out as a white precipitate. The substance 
tedious process of extracting the resin in order to get the crys- 
talline substance, it could be easily obtained by the direct 
steam distillation of the teak-wood saw-dust. For this purpose 
about 100 grams of freshly-made saw-dust from the sample of 
the wood to be examined, were subjected to steam-distillation. 
About 500 c.c. of the distillate was collected in each case, ex- 
tracted with ether, and treated as before. The results in each 
case are given below :— 
ample I.—Fine white needles were obtained without ad- 
mixture of any oily or resinous substance. 
ample Il.—The distillate contained no crystals but a 
small quantity of a brown oily substance. The ethereal solu- 
tion on evaporation left behind the oily substance together with 
an inappreciable quantity of crystals. 
ample I1I.—Though the distillate was cloudy from the 
beginning, crystals appeared only after some time. The ether- 
eal solution on evaporation left white crystals together with a 
small quantity of the oily substance on the side of the dish. 
p _—At first an oily substance came with the dis- 
tillate and the crystals appeared only when about 250 c.c. of 
the distillate had been collected. The ethereal solution on 
evaporation showed an oily substance mixed with some crystals. 
SS) —The crystals came from the very beginning 
and there was absolutely no oily substance mixed with them. 
Description of the samples examined :—Sample I was a ty pi- 
cal seasoned and II a typical unseasoned wood (vide supra). 
Samples III, [V and V were supplied from the workshop of 
the Dacca School of Engineering and were bought 3 months, 
3 years and 5 years back respectively as seasoned woods 
As a result of the present investigation the following con- 
clusions have been arrived at, viz., that :— 
1. Both alcohol and chloroform extract from seasoned as 
well as unseasoned teak-wood about 7 to 8%, of a soft resinous 
matter, melting below 100°. 
2. e percentage composition of the resinous extracts 
from old and new wood is practically the same. 
3. Teak-wood saw-dust yields on steam distillation either 
a crystalline or an oily substance or a mixture of the two,— 
the amount of the former as compared with the amount of 
the latter being a i of the amount of seasoning of the 
sample of wood examined. 
