SEED OILS 157 
‘thus formed from the remaining oil, found that bitaog oil con- 
tains 71.55 per cent of fatty oil and 28.45 per cent of resin. 
The resin is dark brown in color and melts at 30° to 35°. It 
is soluble in benzine, carbon disulphide, petroleum ether, alcohol, 
and other organic solvents. The resin had an iodine value of 
125.2 and the acid number (milligrams of caustic potash re- 
quired to neutralize one gram of resin) was 180.8. 
Since bitaog oil consists of a resin dissolved in a neutral oil, 
it is really a natural varnish and may be useful in the varnish 
industry. 
Watt * says that the nuts are collected twice a year in India, 
,and that they yield 60 per cent of oil. 
The seeds of other species of Calophyllum, especially Calo- 
phyllum blancot Pl. and Tr., also yield an oil used for illum- 
inating purposes. 
Calophyllum inophyllum has been grown sucessfully in planta- 
tions at Los Banos. In most cases the seeds showed fairly high 
percentages of germination. The average rates of growth of 
considerable numbers of trees are given in Table 27. 
TABLE 27.—Growth of Calophyllum inophyllum (bitaog) in plantations 
at Los Banos, Laguna. 

a —, 



Age. Deo Height. 
3 
Years. cm m. 
EEE eS Sa eee eek ees Ae te 8 a to ee .88 
Vecceee See Re St Sos. eee 2 Be ee eee ee ee ee pee 1.45 
1 AL cee ee ha Sie OS ee ee ee ee 2 1.93 
Poe onder cttec Secdbeh ace ase ea ee Se ere ee 3 3.35 
| (eeednstenspes actos pe a an ee ee ee eee 4 4.39 




According to Crevost + the growth of this species seems to 
be very rapid, and at the end of two years some seedlings begin 
to produce fruits. He says that in less than four or five years 
one can hardly count on anything like a normal, annual produc- 
tion which would perhaps be about 20 to 40 kilos according to the 
age of the tree. Several highways in Cochinchina and Annam 
are entirely bordered with this species. 
Calophyllum inophyllum is usually a medium-sized or large 
tree with a very short bole and dense, wide-spreading crown. 
It occurs on sandy beaches throughout the Islands. The bark 


, * Watt, George, The commercial products of India, (1908). 
+ Crevost, Ch., Bulletin Economique de |’Indochine, New Series, Volume 
8 (1906), page 392. 
