146 PHILIPPINE RESINS, GUMS, AND OILS 
ARANGEN OIL 
The seeds of this species yield a solid fat used for illumina- 
tion. The people of the hills back of San Fernando, La Union, 
chiefly the Igorotes, have extracted this product for many years. 
The seeds are crushed and then boiled, when the oil floats on the 
surface. Wells,* who examined this product, says that even with 
potash it makes a good hard soap. 
Ganophyllum falcatum is a tree reaching a height of about 
25 meters and a diameter of about 70 centimeters. The leaves 
are alternate, 20 to 35 centimeters long, and pinnate with alter- 
nate leaflets which are inequilateral, pointed at the tip, oblique 
at the base, and from 5 to 12 centimeters in length. The flowers 
are small, yellowish, and occur in large numbers on compound 
flowering shoots. The fruits are about 1.5 centimeters in length, 
pointed at the tip, rounded at the -base, and contain a single 
seed. The wood is hard and heavy, of fine texture, yellowish 
white, apparently durable, and is used locally for posts and 
other structural parts of houses. 
This species is distributed from northern Luzon to Mindanao. 
Genus NEPHELIUM 
t 
NEPHELIUM LAPPACEUM L., UsAu oR RAMBUTAN. 
RAMBUTAN TALLOW 
A description, figure, and the local names of this species are 
given in the bulletin on edible plants. 
Hefter + states that the seeds of Nephelium lappaceum yield 
40 to 48 per cent of rambutan tallow. 
According to Baczewskiz this tallow has the following con- 
stants: 
Speelfic., eravity:......22 hoy a ee 0.9236 
Solidif-yin eo: Jyoti Aico aa oe ee eee 38°-39° 
Melting’ point:3 W 2. v:.2.06 832 ees ee ee ee .... 42°-46° 
Saponifieation “value. =) 420" e es eee 2. LORS 
Todine> .valtte:t 55 - ess, oe ay es ne ee 39.4 
The insoluble fatty acids of this tallow contain 45.5 per cent 
of oleic acid. 


* Wells, A. H., Chief, Division of Organic Chemistry, Bureau of Science, 
Manila. 
+ Hefter, G., Technologie der Fette und Ole, Volume 2 (1908), page 652. 
+ Baczewski, M., Chemische untersuchung der Samen von Nephelium lap- 
paceum und des darin enthaltenen fettes. Monatshefte fiir Chemie, 
Volume 16 (1895), page 866. 
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