148 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, fine-grained, whitish, fairly durable 

 and is used in house construction. In Cagayan, the bark is used 

 as a substitute for gogo. 



This species is distributed from northern Luzon to Mindanao. 



Genus NEPHELIUM 



NEPHELIUM LAPPACEUM L. USAU OR RamBUTAN. 



RAMBUTAN TALLOW 



A description, figure, and the local names of this species are 

 given in the section on edible plants. 



Hefter t states that the seeds of Nephelium lappaceum yield 

 40 to 48 per cent of rambutan tallow. 



According to Baczewski t this tallow has the following con- 

 stants : 



Specific gravity 0.9236 



Solidifying point .38^-39" 



Melting point 42°-46° 



Saponification value 193.8 



Iodine value 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. 



t Hefter, G., Technologic der Fette und Ole, Volume 2 (1908), page 652. 



t Baczewski, M., Chemische untersuchung der Samen von Nephelium lap- 

 paceum und des darin enthaltenen fettes. Monatshefte fiir Chemie, 

 Volume 16 (1895), page 866. 



