Vol. VIII, No &.] Seasoned and Unseasoned Teak-wood. 305 
[N.8.] : 
hoice of samples.—The old teak-wood examined was 
obtained from a broken piece of furniture which was at least 
respectively. 
Method of extraction.—Fresh saw-dust was made from 
the samples of wood to be examined and dried completely in a 
vacuum dessicator. The extraction of the resin from the dried 
saw-dust was carried out with the required solvent in a 
Soxhlet’s extraction apparatus, so that the amount of resin 
a 
dessicator until the weight was constant. In order to guard 
against any oxidation of the resin during the process of drying, 
care was taken, in each case, from the very beginning not to 
bring it in contact with air for any length of time. 
e extract from old teak-wood was a homogeneous 
resinous mass without appreciable admixture of any oily sub- 
stance, whereas in the extract from fresh teak-wood there was 
an oily substance present. The resins in both cases melted 
below 100°C. and were found to contain C,H and O only. The 
ash left on ignition was negligible. The alcoholic resinous 
extracts from old and new teak-woods gave the following 
results on combustions :— 
Old teak-wood extract. 
I II III IV Vv VE 
C—69° 71% 69°33% 68:00% 67-89% 69°60% 6901% 
H~7°6 %  F21% T6T% 81% «642% 856% 
O—23°69 % 23°46%, 24°4389% 25°30% 23°98% 24-44% 
Fresh teak-wood extract. 
VII VIII IX x 
C—69-95% 69°75%, 70:39%, 69°47, 
H— 7-52%, 713%, 53%, 690% 
O—22-53%, 23-129, 22-08%, 23-63%, 
Particulars about the combustions.—I. The resin, which was 
dried only in a vacuum dessicator, was taken after the weight 
was constant. ‘1779 gram gave °4540 gram of CO, and -1242 
gram of H,O. Found C=69-71%, H=7:60%, 0=23°69% (by 
difference). 
II. The dry resin was just melted in the steam oven, 
which required about three minutes, in order to get it in a 
homogeneous condition, introduced into the boat and cooled in 
