358 
Philippine Journal of Science 
1919 
chemical properties of these extracts has been made as shown 
in the following pages. 
[The following is based mainly on the work by Kinzo Kafuku, former expert chemist of the 
Government Institute of Science, Formosa.] 
A block of cypress pine weighing 36 kilograms is sliced into 
thin pieces and placed in a large extractor. After extracting 
for three days continuously, using 90 per cent alcohol, the 
alcohol is distilled off, and by means of steam distillation the 
light and the heavy oils are separated from the resinous sub- 
stances. Upon cooling delicate needle-shaped crystals appear 
in the heavy oil. Because of their viscous nature, it is very 
hard to separate the oils from the water by filtration. There- 
fore, a proper quantity of ether is added in order to transfer the 
oils to that layer. After separating the layer of ether with a 
separatory funnel, ether is eliminated by distillation. Then that 
which remains is heated under low pressure (30 millimeters), 
and the ether and water are completely driven off. Thus, 375 
grams of the sample (1.04 per cent per kilogram of wood) are 
obtained. Alcohol, instead of benzene, is used as a solvent be- 
cause it is more economical and has the same power of extraction 
in this case. 
Crude oil . — The crude oil extracted from cypress pine is a 
viscous substance having a greenish brown tinge and a slight 
acid reaction; it evaporates at 280° C. under ordinary pressure. 
Table XVI. — -Properties of the crude oil from cypress pine. 
Specific gravity (at 17° C.) 1.002 
Refractive index (at 20° C.) 1.5084 
Optical rotatory power ( [ a ] D in 20 per cent ethyl 
alcohol) (degrees) +18 
Acid value 18.13 
Ester value 51.50 
Ester value after acetylation 196.1 
These ester values indicate the presence of about 90 per cent 
of alcohol (C 15 H 26 0). 
The result of the elemental analysis is as follows: 
0.1863 gram crude oil gave 0.5473 gram C0 2 and 0.1849 gram H 2 0. 
Besides this, the existence of the ester (15 per cent) and of 
phenol (10 per cent) is also proved. But as the percentages 
THE VOLATILE CONSTITUENTS OF CYPRESS PINE 
:er ccmu 
81.08 80.12 
11.71 11.11 
Found. 
Per cent. 
c 
H 
