166 SOAPS AM) I'KOTKINS 



ing to HAZURA, consist approximately of 40 percent olcic acid 

 and >0 percent linolic acid. 



Sesame Oil. This oil cont ains, according to FARXSTEINER, 12. 1 

 to 14.1 percent of solid acids, the liquid acid making up the 

 remaining fraction holding usually about 15.8 percent linolic acid 

 and 72.1 percent oleic acid. 



Olive Oil. According to TOLMAN and MuNSON, 1 the solid 

 fatty acids of this oil, as obtained from different source-, vary 

 U-t ween '2 and 17.72 percent. These solid fatty acids are chiefly 

 palmitic acid with a trace of arachidic. Stearic acid is alrnt. 

 The liquid fatty acids, according to HAZURA and GB&BSNEB, 

 consist of 93 percent, oleic acid and 7 percent linolic acid. 



Castor Oil. The whole oil on standing in the cold deposit- 

 3 to 4 percent of stearic and ricinoleic acids (KRAFFT 2 ) and 1 

 percent dihydroxy stearic acid (JUILLARD). The liquid fatty acids 

 of castor oil consist chiefly of ricinoleic and some isoricinoleic 

 acid. Oleic acid seems to be absent (HAZURA and GRUSS- 



XKK 3 ). 



Cod Liver Oil. Crude cod liver oil contains a considerable 

 portion of stearic and palmitic acids. The oil as it comes to 

 market has usually been freed from these. In the liquid oil 

 small quantities of acetic, butyric, valeric and capric acids have 1 

 been found by various authors. There is an absence of oleic 

 acid, and it is believed that the bulk of the fatty acids is made 

 up of acids less saturated than those of the oleic acid series. 

 According to HEYERDAHL 4 the following percentages of different 

 acids have been definitely isolated. 



Palmitic acid 4 percent 



Jecolfic arid 20 percent 



Therapip acid 20 percent 



Palm Oil. This is a mixture of glycerids of oleic acid and 

 various solid fatty acids. Ninety-eight percent of the solid fatty 

 acids is palmitic acid and 1 percent or less is stearic acid. HA/JKA 

 and r.ui \KR have discovered linolic acid among the liquid 

 fatty acids of this oil. 



i L M TOLMAN- and L. S. MuNSON : Jour. Am. ("hem. Boc., 2.Y av> <1903). 

 'F. KRAFPT: Her. <1. deut. chem. Geselbeh., 21. 2730 KS8). 

 QuotM by .1. LBWKOWRBCH: oils. \-'-^- ami Waxes, :>th Kd.. iv 

 London (1914). 



* J. LEWKOWITSCH: Oils, Fats and Waxes, 5th Ed, 2, 430, London (1914). 



