146 



Prof. B. Moore. On the Synthesis of [June 15, 



0-4 aramme of glycerine; No. 2, 0'8 gramme of sodium oleate only; No. 3, 

 0-8 gramme of sodium oleate after previous boiling ; No. 4 had nothing added and 

 was not boiled previous to digestion. 

 The results were as follows : 



It is here obvious, from inspection of the third column, that the amount of olein 

 formed, as shown by the difference between No. 4, in the olein column, and the 

 other three, is negligible and lies well within the limit of experimental error. 

 Column No. 4 shows that the difference between total ethereal extract and free 

 oleic acid is due to dissolved soap. 



ADDENDA TO THIS EXPERIMENT. 

 a. Controls with Distilled Water. 



An experiment was next instituted to control the above and succeeding experi- 

 ments of this series, by taking solutions in distilled water (a) of sodium oleate and 

 glycerine, and (5) of sodium oleate alone, in identical strengths with those used 

 above. The same amounts of solution, period of digestion, and modes of extracting 

 and titrating were employed. 



The following results were obtained : 



This demonstrates that the chief thing dissolved and extracted in these controls 

 was unaltered soap, and hence that the free oleic acid found in the case of the 

 other experiments was not due to the experimental procedures employed, and 

 further that the small amount of olein there found being no higher than here, was 

 due to experimental error. 



