286 The Philippine Journal of Science 1923 



gave, however, about the same results as with 1 per cent. Pos- 

 sibly this was due to the fact that the catalyst was not working 

 so effectively in this particular reduction. 



Lumbang oil consists almost entirely of a mixture of linolenic, 

 linolic, and oleic glycerides. When lumbang oil is completely 

 hydrogenated the reduction product should, theoretically, have 

 no iodine value, and the melting point should be approximately 

 71.6°, which is the melting point of pure stearin. With a catalyst 

 containing 3 per cent nickel, hydrogenation for twenty hours 

 at practically atmospheric pressure gave a sample having a 

 melting point of 67.5° to 71.5° and an iodine value of only 1.08. 

 This result would seem to indicate that the hardened lumbang 

 oil, which had the appearance of a hard, white solid, was nearly 

 pure stearin. 



The results obtained experimentally agree fairly well with the 

 results estimated from the composition of the oil, and indicate 

 that lumbang contains no considerable quantity of saturated 

 glycerides of low melting point. The result of complete hydro- 

 genation serves, therefore, as a kind of check on the composition 

 of the oil as determined by analysis. 



PILI NUT 



Pili-nut oil is obtained from the nuts of Canarium ovatum, 

 which is a tree reaching a height of about 20 meters and a 

 diameter of 40 centimeters. This species is very abundant in 

 southern Luzon. The fruits are 6 to 7 centimeters in length 

 and consist of hard, thick-shelled, triangular nuts surrounded 

 by a small amount of pulp. Pili nuts are rich in oil and when 

 roasted have a delicious flavor. They are used in making con- 

 fections and by many are considered superior to almonds. Pili- ' 

 nut oil is light yellow, has an agreeable odor and taste, and is 

 suitable for culinary purposes. 



The composition 1S of pili-nut oil has been determined by 

 means of the lead-ether and bromo-derivative methods. Table 

 3 shows that pili-nut oil consists largely of the glycerides of 

 oleic and palmitic acids and contains also a small percentage of 

 stearic glyceride. 



" Composition determined by A. P. West and S. Balce, antea 269. 



