xv, 4 Oshima: Formosan Termites 365 
Foochow cedar, an investigation of its chemical properties was 
made. 
Some fine, fresh material was forwarded by the authorities of 
the Bureau of Forestry, from the mountain in Giran. It was 
treated in the same way as Foochow cedar, being cut into thin 
pieces and extracted by means of steam distillation. It is rather 
striking that exactly similar oil and crystals were obtained from 
Randai cedar and from Foochow cedar. However, the per- 
centage of the oil in Randai cedar, 1.62 per cent, differs slightly 
from that in Foochow cedar, 4.6 per cent. 11 
STUDIES ON CAMPHOR GREEN OIL 
[The following is a result of the joint work of M. Oshima, naturalist, and Kinzo Kafuku, 
former expert chemist, of the Government Institute of Science, Formosa.] 
As shown in the preceding pages, a sesquiterpene alcohol 
(C 15 H 2U 0) seems to be one of the chemicals that are effective 
in preventing the attack of termites. It is highly expensive to 
import cypress pine or other immune timbers for the sake of 
building ordinary houses. Moreover, it is almost impossible to 
get a sufficient quantity of guajol or cedrol for use in 
conferring immunity upon nonresistant timbers. Under these 
circumstances the work was extended to discover some home 
product from which sesquiterpene alcohol could be obtained. As 
a first step camphor oil was investigated, because the heavy oil 
of this is greenish and viscous like the oil extracted from cypress 
u Foochow cedar; Cunninghamia sinensis R. Br. Trunk 10 to 15 meters 
tall, branches whorled. Leaves very densely and alternately arranged, 
distichous, coriaceous, 3 to 7 centimeters long, 5 to 7 millimeters broad, 
linear-lanceolate acuminate, slightly serrulate at the margin, polished 
above, dull below. Male flower 10 to 15 millimeters long, 3 to 4 millimeters 
broad, yellow. Cone 3 to 4 centimeters long and broad ; middle scale 
15 to 18 millimeters long and wide; seeds 6 to 7 millimeters long, 5 to 
6 millimeters broad, very complanate, surrounded by a small wing. 
Randai cedar; Cunninghamia konishii Hayata. Trunk tall, branches 
terete, glabrous. Leaves linear falcate, acute, slightly carinate on the 
back, lanceolate, 15 millimeters long, 2.5 millimeters broad, slightly obtuse 
at the apex, slightly serrulate at the margin, coriaceous, slightly glaucous. 
Cone ovately globose, 20 centimeters long, 15 millimeters broad. Scales 
rounded. Seeds very small, ovately elliptical, surrounded by a small wing. 
The grain of Randai cedar is finer than that of Foochow cedar. When 
freshly cut it emits a sweet fragrance. The heartwood has a dark reddish 
color. At present it is hard to find this wood in the market, but the 
Bureau of Forestry of the Government of Formosa plans to supply it 
as a building material in Formosa in the near future. 
