116 



PHILIPPINE RESINS, GUMS, AND OILS 



is edible when cooked, also contains an oil which is occasionally 

 extracted locally and used for lighting and in cooking. Its 

 chemical properties have not been investigated. 



Mr. E. Tabat, who kept a record of the yield of a number of 

 trees, found that an average tree produced 33 kilos of nuts in 

 one year. The cost of gathering the nuts was 2.5 centavos per 

 kilo, and of husking them, 1.5 centavos per kilo. 



Mr. Tabat tried three methods of removing the soft covering 

 of the nuts and found that the best method was to place them 

 in fresh water for at least 24 hours, after which the soft part 

 was easily removed. If the fresh nuts were put in sacks and 

 piled in a corner and the soft covering allowed to rot, many of 

 the nuts were spoiled, apparently by the heat produced by the 

 decay of the soft, outer coverings. This method also resulted 

 in the loss of sacks. He found it inadvisable to remove the 

 soft covering by means of hot water, as this frequently cooked 

 the nuts, thus greatly impairing their keeping qualities. 



Brill and Agcaoili * analyzed what they called long and short 

 varieties of pili nuts from Canarium pacJujphyllum. The results 

 are recorded in Tables 12 and 13. 



Table 12. — Composition of the kernels of pili nuts. 



Moisture 



Fat 



Protein (N x6.25) 



Sucrose 



Reducing sugars 



Starch (by difference) 



Crude fiber 



Ash 



Table 13. — Chemical constants of pili oil. 



Long. 



Short. 



Specific gravity at 30° C 



Butyro refractometer reading at 30° C 



Iodine value (Hanus) 



Reichert-Meissl value 



Saponification number 



Free fatty acids (oleic) per cent. _ 



Acid value cc. N/lO NaOH— 



* Brill, H. C, and Agcaoili, F., Philippine oil-bearing seeds and their 

 properties: II. Philippine Journal of Science, Section A, Volume 10 (1915), 

 page 110. 



