NOTES ON JAPANESE VEGETABLE OILS. 5 



2. Camellia Oil or Oil of Thea Japonica (i.) J^ois 



( Tsubahi-abura) . 



The sample used was commercially pure. 

 -^\ 0.9138. 



Iodine value (Hübl's method) 79.47 ; the oil, therefore, 

 belongs to the class of non-drying oils. 



The mixed acids obtained by saponifying this oil were 

 oxidised by potassium permanganate according to Hazura's 

 method, but at an ordinary temperature. A large quantity of 

 white lustrous crystals of m. p. 128-130° was obtained. The 

 acid equivalent w^as found to agree with that of dihydroxystearic 

 acid. No sativic acid or linusic acid was obtained. From these 

 facts it is evident that the principal acid in this oil is oleic acid. 



No solid bromine addition product was obtained. 



3. Oil of Tert'eya nuclfera S, et Z, 



{Kayano-abura) . 



This sample I made myself by pressing the seeds in the cold. 



The iodine value (Hübl's method) was found to be 137.3. 



The mixed acids obtained by saponifying the oil with alcoholic 

 potash were recrystallized from acetic acid or from alcohol. White 

 scaly crystals of m. p. 57.5° were obtained. This substance does 

 not change in the air, nor absorbs bromine in acetic acid solution. 

 The figures obtained for its acid equivalent were 270.3, 280 and 

 281 ; it therefore appears likely that the acid is stearic acid 

 CisH3602 = 284, or possibly a mixture of stearic and palmitic acids. 



A bromine addition product of the mixed acids was obtained 

 in the usual manner, its melting point, lié"", agreeing with that 



