136 PHILIPPINE RESINS, GUMS, AND OILS 



sario. A few of these constants have also been determined by 

 Aguilar. These results are recorded in Table 21. Bagilumbang 

 oil, like lumbang, has high iodine and saponification values and 

 its physical and chemical properties are generally satisfactory. 

 However, when the bagilumbang nuts were kept about sixteen 

 months, they underwent so great a change in the oil value that 

 the yield by expression was reduced from 56 to 40 per cent of 

 the weight of the kernel, and the oil was high in acid value and 

 much darker in color than that obtained from the fresh nuts. 



Table 21. — Constants of bagilumbang oil. 



Constants. 



Sample. 



l.a 



2.b 



„ .^ . fl5.0°C 



Specific gravity 



Acid value (milligrams of potash per one gram of oil) 



Acid value (cc. O.l N KOH) 



Saponification value 



Iodine value (Hanus) 



Maumene value 



Refractive index (60° C) 



Hehner value 



Melting point 



Solidifying point 



0.9368 

 2.150 



-[ 2.22 



200.5 191 



158.5 166 

 86.2 



1.483 - 



95.79 



2°-4°C. 



-6.5C. 



" Richmond, G. F., and Rosario, M. V. del. Commercial utilization of some Philippine 

 oil-bearing seeds: preliminary paper. Philippine Journal of Science, Volume 2 (1907), page 

 439. 



•> Aguilar, R. H., A comparison of linseed oil and lumbang oils as paint vehicles. Philip- 

 pine Journal of Science, Volume 12 (1917), page 235. 



According to Aguilar, the nuts of Aleurites trisperma may be 

 crushed and finely ground in an oil mill and the oil extracted 

 directly from the crushed nuts. However, he found that the 

 oil thus obtained was dirty, highly contaminated with shell par- 

 ticles, dark colored, and had a relatively high acid value. Owing 

 to the small amount of labor involved in shelling the nuts, it 

 seems desirable to extract the oil from the kernels rather than 

 from the whole nuts. It probably would be more profitable to 

 cultivate Aleurites trisperma than Aleurites moluccana, as the 

 nuts of the former are more easily shelled than those of the 

 latter, and, moreover, bagilumbang oil resembles tung oil more 

 closely than does lumbang oil. 



However, Aleurites trisperma is not so abundant as Aleurites 

 moluccana and consequently the supply of bagilumbang nuts can- 

 not be depended upon until planted trees have begun to bear. 

 The attention of manufacturers should, therefore, be directed 

 for the present to the production of lumbang oil rather than 



