118 



EXPERIMENT STATION. 



[Jan. 



with ether, which dissolved the imsaponifiable matter. The 

 amount was very small and presumably phytosterol. Morawski 

 and Stingl^ report .22 per cent, unsaponifiable matter. 



The percentage of insoluble acids including unsaponifiable 

 matter (Hehner number) is reported by only two analysts. 



Solidification of the insoluble acids was rather difficult, owing 

 to the high percentage of liquid fatty acids, which Lane^ re- 

 ports as 80.26 per cent. The solid acids are said to be largely 

 palmitic. The neutralization number and mean molecular 

 weight agree closely with the calculated results for total fatty 

 acids, and such should be the ease in the absence of any ap- 

 preciable amount of soluble acids. 



The iodine number, as recorded by every observer, shows a 

 high content of unsaturated acid. 



The result obtained ou the ]\Iassachusetts sample l)y Wijs' 

 solution was somewhat higher than the others, indicating an 

 oil of slightly different composition. The liquid acids are prob- 

 ablv a mixture of oleic and linolic aci'ds, as the high iodine 

 number (130.77) is equivalent to 152 per cent, of oloin, thus 

 proving the presence of an unsaturated acid of a greater iodine 

 absorption than oleic, — presumably linolic. Assuming that 

 the total stated by Lane is reasonably accurate, the amount of 

 each acid can be calculated by means of their theoretical absorp- 

 tion. Let X and y represent the percentages of oleic and linolic 



1 From Lewkowitsch. 



2 Average. 



