6 AET. 4. — T. KAMETAKA : 



of tetrabromostearic acid Ci8H32Br402. This oil therefore contains 

 linolic acid C18H32O2 or its isomers besides stearic acid. 



4. Soja bean Oil or Oil of Glycine hispida llaxim. 



[Daidzu-abura). 



The sample used was pure oil obtained from Tokushima. 

 A bromine addition product of the mixed acids was obtained 

 melting at 110°. This appears to be tetrabromostearic acid 



Ci8H32Br402 . 



Oxidation of the mixed acids by Hazura's method gave 

 dihydroxystearic acid and sativic acid, the yield being about 

 27.5 parts of the former and 10 parts of the latter from 100 

 parts of the oil. 



From these experiments it can be seen that the unsaturated 

 acids in this oil are principally oleic acid and linolic acid, or 

 its isomer. 



5. Oil of I*erilla ocymoides L. 



[Eno-ahura). 



A commercially pure sample was employed. 



The bromine addition product of the mixed acids prepared 

 in the usual manner sej^arated out from hot glacial acetic acid 

 as a white voluminous precipitate, which under the microscope 

 showed no crystalline structure but consisted of fine oily drops, 

 m. p. 181°. A bromine determination gave the following result : — 



From 0.2235 gr. substance 0.3160 gr. AgBr was obtained, 

 .-, Br =62.61^/^. Calculated for the formula dsHooBrcO., Br = 

 63.32«/^. 



