X, A, 2 Brill and Acjcaoili: Philippine Oil-bearing Seeds 



111 



EXAMINATION OF THE DRYING PROPERTIES OF VARIOUS PHILIPPINE 



OILS 



Richmond and Rosario' had planned to examine the oils of the 

 Philippines for their drying qualities, but for various reasons 

 were unable to do so. A great deal of interest is shown 

 in drying oils by manufacturers, because of the wide and varied 

 uses 'to which such oils are put. On this account we have made 

 a rather extensive examination of the drying qualities of these 

 oils and a critical study of some special tests for their distinction. 



Table IX. — Solubility of Philippine vegetable oils in alcohol and ether. 



Botanical name. 



Local name. 



Solubility of oil in — 



Absolute alcohol. 



90 per cent 

 alcohol. 



Ethyl ether. 



Sterculia fwtida 



Chisochiton dumi/i- 



giamis. 

 Aleurites moluccana _ 

 Aleurites trisperma _ , 



Ceiba pen tandra 



Canarium pachy- 



pkylhnn. 

 CalophyUuifi ino- 



phylltirn. 

 Calophyllum wallich- 



ianum. 



Calumpang- 



Cato 



Insoluble (1-4) ... 

 Soluble (1-1) 



Insoluble 



do 



Not so readily. 

 Easily. 



Do. 

 Do. 



Do. 

 Do. 



Do. 



Do. 



Lumbang bato 



Lumbang banu- 

 calag. 



Insoluble (1-4) ... 



do 



Soluble (1-1) 



do 





do 



Pili 



Palo maria de la 



playa. 

 Palo maria del 



monte. 



do 



do : 



Soluble (1-1) 



do 



do 



do 







This scheme would make it possible to distinguish lumbang 

 bato from lumbang banucalag, since the former is insoluble in 

 absolute alcohol in the proportion of 1 to 4, while the latter is 

 soluble in the proportion of 1 to 1. 



Aleurites moluccana afid Aleurites trisperma. — These oils, 

 known locally as lumbang bato and lumbang banucalag, respec- 

 tively, have been discussed by Richmond and Rosario.-^ 



A good deal of contradictory information has been recorded 

 in the literature in regard to the properties of the press cake. 

 Drury, Useful Plants, has this statement: 



The cake, after expression of the oil, is a good food for cattle, and 

 useful as manure. 



The United States Dispensatory states: 



The cake left after the expression of the oil, given to a dog in the 

 dose of about half an ounce produced no vomiting, but acted strongly as a 

 purgative. 



' Loc. cit. 



Loc. cit. 



