PEDALINEM 31 



Ihe oil-cake has tlie following composition : 



Water 825 



Fat 7-63 



Non-nitrogenous matter 40-90 



Albumenoids containing 5 '25 



per cent, nitrogen ......... 32"82 



Ash 10-40 {BramiL) 



For further information on Sesame oil we would refer 

 the reader to Vol. II. of Allen's Commercial Organic Analysis, 

 and to Branut's work on Oils and Fats. The authors of the 

 PharmacograpMa say :— " The oil is a mixture of olein, stearin 

 and other compounds of glycerin with acids of the fatty series! 

 We prepared with it in the usual way a lead plaster, and treated 

 the latter with ether in order to remove the oleate of lead. 

 The solution was then decomposed by sulphuretted hydrogen 

 evaporated and exposed to hyponitrlc vapours. By this process 

 we obtained 72-6 per cent, of Elaidic acid. The specimen of 



iequently, contained 76-6 

 per cent, of olein, inasmuch as it must be supposed to be present 

 in the form of triolein. In commercial oils the amount of 

 olein is certainly not constant. 



" As to the solid part of the oil, we succeeded in removing 

 faty acids, freely melting after repeated crystallizations at 

 67 a, which may consist of stearic acid mixed with one or 



Sesame 



tj 



-Im 



more ol the allied homologous acids as Dalmi 

 By precipitating 



Heintzj we final!" 

 63 



stearic acids. 



"The smaU proportion of solid matter which separates from 

 the oil on congelation cannot be removed by pressure, for even 

 at many degrees below the freezing point it remains as a soft 

 magma; m this respect Sesame oil differs Ur.r^ ^\.., .* .i- ._ 



contains 



has 



It 



may be obtained in solution by repeatedly shaking £ve volumes 



