142 Scientific Proceedings, Royal Dublin Society^ 



Distillation by Blicktield's process gave the following figures : — 



Total volatile acids, ..... 16-0 per cent. 



Insoluble silver salts, .... 13"6 per cent. 



Soluble silver salts, 2'4 per cent. 



Melting-point of insoluble volatile acids, . 1 9'0° 



SUMMAEY. 



The distillation constants of the fatty acids, alcohols, and phenols, soluble 

 in water, bear a relation to the molecular structure of the substance. 



The distillation of solutions containing a volatile solute can be applied to 

 detect changes in the state of molecular aggregation. 



The analysis of solutions of fatty acids by distillation may be extended to 

 differentiate butter-fat from other fats containing a relatively high proportion 

 of acids volatile in steam. 



