364 Philippine Journal of Science 
1919 
while above that temperature they are yellowish and become 
highly viscous. 
The crude crystals separated from the oil were dissolved in 
absolute alcohol and forty-three parts of water were added. 
Then the solution was cooled in order to precipitate the crystals. 
Under atmospheric pressure it was sublimated again, and the 
pure crystals were obtained. 
I. 0.2319 gram of crystals gave 0.6822 gram C0 2 and 0.2442 gram H a O. 
II. 0.2159 gram of crystals gave 0.6381 gram CO- and 0.2268 gram H,0. 
C 
H 
Required for 
C ; ,Ho»0. 
Per cent. 
81.08 
11.71 
Found. 
Per cent. 
I. II. 
80.23 80.61 
11.69 11.76 
These percentage numbers agree quite well with those of 
sesquiterpene alcohol. The molecular weight of the crystals 
(231 to 234) also approximates that of the sesquiterpene alcohol 
(222). Such being the case, there is no doubt that the crys- 
talline substance contained in Foochow cedar is a sesquiterpene 
alcohol. 
Mr. K. Kafuku studied this crystal in detail and expressed 
the view that cedrol, a sesquiterpene alcohol that has been ex- 
tracted from red cedar ( Juniperus virginiana L.), is the same 
substance. 
Table XXIII. — Compaidson of Foochow cedar crystals with cedrol. 
Foochow 
cedar crys- 
tals. 
I 
Cedrol. I 
i 
Melting point °C_ 
Boiling point — 
Optical rotatory power . degrees.. 
86 
292 to 294 
a +10.9 
86 to 87 
291 to 294 
b+9.5 
° In 10 per cent chloroform solution. 6 In 11.3 per cent chloroform solution. 
Cedrol, the principal ingredient of Foochow cedar oil, is not 
identical with guajol. It is a striking fact, however, that both 
cypress pine and Foochow cedar, which are said to be highly 
resistant to the attack of termites, contain antiseptic compounds 
that belong to the same group, the sesquiterpene alcohols. 
Besides Foochow cedar, another species is contained in the 
genus Cunninghamia. A few years ago, Dr. B. Hayata described 
this species from Formosa, giving it the name Cunninghamia 
konishii. At present it is not known whether it is resistant to 
the attack of termites or not; but, as it is very closely allied to 
