116 PHILIPPINE RESINS, GUMS, AND OILS 
lent to one part of castor oil. These writers state that the 
soap-making quality of this oil was tested by the Bureau of 
Science with gratifying results and that the oil is now being 
used by at least one firm in Manila in this industry. 
Balukanag oil has the following chemical constants: 
Specific eravity atta: \ Co.) feces eee eee, eae 0.9203 
Speciticsrayityaatis 0s Cis ee ee 0.9188 
Butyro refractometer (reading at 30° C.)....0000-2. 60-61 
Todine value (Hanus) 2.0.55) <2 ee 80.78 
Reichert-Meissl: values.) ou. A SER Os eee 7.34 
Saponification ium er ae eee 192.02 
Free fatty acids (oleic)......... By he ee ae eee per cent.... 3.98 
Actas “walttes!> oie. cc nt eee ce... N/10 KOHS2 eae « 
Chisocheton cumingianus is a tree reaching a height of 20 
meters and a diameter of 45 centimeters. The flowers are fairly 
numerous, on long inflorescences. The leaves are compound 
with leaflets about 20 to 25 centimeters in length. The fruit 
is pear-shaped and when dry is about 8 centimeters in diameter. 
It contains nuts averaging 3 centimeters in length and 2.5 centi- 
meters in width. 
This species is distributed from northern Luzon to Mindanao. 
CHISOCHETON PENTANDRUS (Blco.) Merr. (Fig. 42). KATONG- 
MACHIN. 
Local names: Igiu (Tayabas); kdtong-bakdlau, malatumbdaga, kdtong- 
machin (Bataan); pamalat’dngen (Cagayan). € 
KATONG-MACHIN OIL 
Oil extracted from the fruit of this species is used locally as 
a hair cosmetic. 
Chisocheton pentandrus is a tree reaching a height of 30 
meters and a diameter of 40 centimeters. The leaves are al- 
ternate and compound. The leaflets are opposite, pointed at * 
the tip, rounded at the base, and 7 to 14 centimeters in length. 
The flowers are small and are borne on long-branched inflores- 
cences. The fruits are round, red, hairy, and about 1.5 centi- 
meters in diameter. 
This species is distributed throughout the Archipelago. 
Genus XYLOCARPUS 
XYLOCARPUS MOLUCCENSIS Lam. PIAGAU. 
PIAGAU OIL 
A. description and figure of this species and its local names 
are given in the bulletin on mangrove swamps. 
Heyne* says that, according to Wijs, the seeds contain 40 to 

* Heyne, K., De Nuttige Planten van Nederlandsch-Indié, Volume 3 
(1917), page 45. 
