X, A, 2 Brill and Agcaoili: Philippine Oil-bearing Seeds 119 



Redman, Weight, and Block '^ have determined the drying 

 rates of linseed, china wood, fish, and soya bean oils. Raw 

 linseed oil reached a maximum increase in weight of 11.7 per 

 cent at the end of the sixth day; china wood oil shows an in- 

 crease of 10.5 per cent between the eighth and ninth days; the 

 fish oils show an increase of 13 per cent between the third and 

 fourth days; while soya bean oils show an increase of 7.7 per 

 cent between the sixth and seventh. (Compare with the results 

 as recorded in Table XII). Lippert ^- gives the increase for raw 

 linseed oil as 12.4 per cent on drying. Meister ^-^ says that china 

 wood oil is slower in absorbing oxygen than linseed oil, and 

 although the film forms in from one to two days it does not 

 become firm until the fifth or sixth. The lumbang oils compare 

 very favorably with china wood oil and linseed oil in rate of 

 drying, quality of film, and the per cent change in weight when 

 drying. The results of these investigators are especially in- 

 teresting in comparison with the results obtained by us as set 

 forth in Tables XII and XIII. 



SUMMARY 



The percentage yields, chemical constants, physiological prop- 

 erties, and commercial possibilities of cato, calumpang, and pili 

 nut oils have been given and discussed. 



An investigation of the drying qualities of the oils from the 

 nuts of calumpang, cato, lumbang bato, lumbang banucalag, 

 kapok, pili, palo maria de la playa, and palo maria del monte is 

 recorded, demonstrating that lumbang bato and lumbang banu- 

 calag are drying oils of high quality, comparing favorably with 

 linseed and china wood oils, and that the others have no appre- 

 ciable drying qualities. 



"Journ. Ind. & Eng. Chem. (1913), 5, 630. 

 "Journ. Franklin Inst. (1899), 156. 

 "Journ. Soc. Chem. Ind. (1911), 30, 95. 



