SEED OILS 159 
It would seem that it might be worth while to examine the 
seeds of other Philippine species of Shorea and also of species 
of Hopea, as there are in the Philippines 21 species of Shorea 
and 13 of Hopea. 
Family FLACOURTIACEAE 
Genus PANGIUM 
PANGIUM EDULE Reinw. PANGI. 
PITJOENG OIL 
A description, figure, and the local names of this species are 
given in the bulletin on edible plants. 
Pangium edule has seeds which yield about 50 per cent of 
pitjoeng, or samaun, oil having the following constants (Lew- 
kowitsch) : 
STEE GT Ob SCE R Chace a ani RE Tm RE RENRe ec = a 0.937 
SELL EDRACCE (3) OS A) | | eee ae ee ee ae 2 178-183 
ANC CRIN ere UU se cae a 8, a a Se 89.94 
Mibote testat ts fable aClOs 25 wo or Seo A 44,4 
According to Lewkowitsch: * 
The seeds contain a cyanogenetic glycoside of which some passes into 
the oil when it is prepared by the natives, and is only removed by pro- 
longed boiling. The oil prepared in a very primitive fashion by the 
natives of Java, by heating the dry seeds and passing the mass between 
* boards, is used as an edible oil. 
Hefter + says that this oil is used as an illuminant and for 
making soap. 
Family LECYTHIDACEAE 
Genus BARRINGTONIA 
» BARRINGTONIA ASIATICA (L.) Kurz. BOTONG. 
Local names: Balubitédon (Guimaras Island); bitdon (Surigao); boo- 
ton, bétong (Tayabas); boton (Tayabas, Camarines, Albay, Zamboanga) ; 
lugo (Cagayan); palaupalau (Negros). 
BOTON OIL 
Watt + states that: 
In the Moluccas a lamp-oil is said to be expressed from the seeds of 
this plant. (Treasury of Botany.) 

* Lewkowitsch, J., Chemical technology and analysis of oils, fats, and 
waxes, Volume 2 (1914), page 496. 
+ Hefter, G., Technologie der Fette und Ole (1908), page 687. 
t Watt, G., Dictionary of the economic products of India, Volume 1 
(1885), page 403. 
