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T. E. THORPE. 



fat and other admixtures. This was effected by neutralising the free 

 acid witli standard Na OH solution and extracting with light petroleum 

 from 50 per cent alcoholic solution; the alcohol was then expelled from 

 the neutral solution which on acidification again yielded the free acids. 



Four experiments on about 20 grams fat respectively gave the follo- 

 wing percentages : 



(1). (2). (3). (4). 



Neutral Fat 61,3 61,9 61,8 61,1 



Free acids... 37,5 36,7 37,2 37,9 



98,8 98,6 99,0 99,0 



Mean values. Neutral fat 61,5 



Free acids 37,3 



98,8 



The phosphorus was found to be distributed as follows: 



Neutral fat, (mean) 0,058 % P X 0,6152 0,03 % 

 Free acids, „ 1,38 „ X 0,3728 0,51 % 

 Acid liquid (from local saponification) 0,07 % 



0,61% 



As against direct fusion. ... 0,60 



A neutral fat was thus obtained free from acidity and almost free 

 from phosphorus. 



The composition of the original fat is then approximately 



Lecithin 15,04% 



Free acid (as oleic) 23,20 



Neutral fat (by différence) 61,76 



100,00 



whereas actual experiment gives 



Lecithin and free acid 37,3 % 



Neutral fat 61,5 % 



98,8 



