﻿I'UlUI'l'INK OIL-BEARING SEEDS. 



443 



Aleurites trisperma. — Another species of candle nut, called lumbang 

 banucalag in Cavite and baguilumbang in Tayabas, is entirely confined 

 to the Philippines, where it is widely distributed, but not so abundant 

 as the first variety. The tree is about 40 feet high, and the fruit 

 matures in June and .Tidy. Both species are propagated by seed or by 

 cuttings and are of very rapid growth. The oil expressed from the 

 Aleurites trisperma is more viscous and darker colored than that from 

 Aleurites moluccana. Locally it is used principally for painting boats. 

 The seeds of this variety of candle nut are comparatively thin shelled and 

 are easily crushed. 



One kilo of unshelled nuts produced 357 grams of shells and 043 

 grains of kernels. One kilo of unshelled nuts, crushed and pressed, 

 yielded 327.28 grams of oil or 32.72 per cent which corresponds to a 

 yield of 50.9 per cent calculated on the kernels. The oil dries more 

 rapidly than linseed oil or the lumbang bato previously described, and 

 is so closely allied to the Chinese wood oil as to make its differentiation 

 difficult. 



A careful study of the drying properties of the two species of Aleurites 

 oils found in the Philippines as compared with Chinese wood or tling 

 oil (Aleurites sp.) and linseed oil, is now being made in this laboratory. 

 Considerable confusion and great variation in the recorded constants for 

 the Chinese variety of Aleurites exist in the literature." Certain observers 

 name two varieties of trees- producing Chinese wood or tihig oil and as 

 this oil is considered of great value in the manufacture of varnishes and 

 linoleum, the study which we have undertaken for the establishment of 

 its similarity or identity with the oils furnished by the local species is 

 important. The results are not ready for publication. 



Table II. — Table of oil constants. 



Property. 



Specific gravity at 15° C 



Acid value (milligrams of potash per one gram 



of oil) , 



Saponification value (milligrams of potash per 



one gram of oil) 



Iodine value (Hanus) 



Maumeng value 



Refractive index at 60° C 



Hehner value 



Melting point 



Solidifying point 



Lumbang 

 bato 



(Aleurites 

 moluc- 

 cana). 



0. 925-0. 927 

 2. 115 



193. 5 



•150.2 



100 



1. 4648 



95.54 



-12° C. 



-22° C. 



Lumbang 

 banucalag 



(Aleurites 

 trisperma). 



0. 9368 



2. 150 



200. 3 



200.5 



»158.5 



8G.2 



1.483 



95.79 



2 to 4° O. 



—6. 5° C. 



Chinese 

 wood" or 

 tiing oil 

 (Aleurites 



sp.). 



0. 9425 

 4.547 

 4.568 



189.3 



155.7 



105 



1.5032 



94. 32 



2°C. 



7. 5° C. 



Linseed' 1 

 oil. 



0. 9368 

 3.18 



. 186 



179 



103 

 1.1687 

 94.43 



-25° C. 



•Average 8 determinations. 

 b Average 4 determinations. 



e Oil obtained on the Hongkong market. 



■' Pure oil obtained from expression of hand-picked seed. 



'■ Krir. Hull. (1906), 117: Hull. Imp. Inst. (1907), 5, 134, 



