AMIDES OF THE FATTY ACIDS. 303 



Theory. Mean. 



C 36 . 216 76-86 76-44 



H 35 . 35 12-45 12-70 



N . 14 4-98 4-88 



O, . 16 5-71 5-98 



281 100-00 100-00 



Castor Oil. 



I had commenced the examination of the action of ammonia upon castor oil 

 previous to the publication of M. Bouis' paper upon the same subject, but as he 

 has described ricinolamide, and some of the products of its decomposition, I did 

 not continue my own experiments in that direction, though I made a partial ex- 

 amination of the mother liquor filtered from the amide. 



When this filtrate is concentrated by evaporation, the addition of hydrochloric 

 acid to it causes the separation of an oil which was collected upon a moistened 

 filter, washed with water, and then dissolved in ammonia. The addition of 

 chloride of barium to this solution gave a precipitate, which was purified by re- 

 peated crystallizations from alcohol. It fuses under alcohol, and adheres to the 

 bottom of the vessel, but is more readily soluble in alcohol than oleate of baryta. 

 By analysis it was found to be ricinolate of baryta. 



•3120 grammes of substance gave 

 •0995 ... of sulphate of baryta. 



•2444 grammes of substance gave 

 •0785 ••• of sulphate of baryta. 



•3333 grammes of substance gave 

 •1070 ... of sulphate of baryta. 



•3108 grammes of substance gave 

 •6675 ... of carbonic acid, and 

 •2533 ... of water. 



I. II. III. IV. 



58-57 

 9-05 



Carbon , 



Hydrogen, 



Baryta, 



. 20-95 

 Theory. 



21-10 



21-09 



Mean. 



C 36 

 H 33 

 5 



BaO . 



. 216 

 33 

 . 40 

 . 76-6 



59-08 



9-02 



10-95 



20-95 



58-57 



9-05 



11-33 



21-05 



365-6 100-00 100-00 



The cause of the presence of ricinoleic acid in the mother liquor is explained 

 by a remark made by M. Bouis in his paper, viz., that ricinolamide is decom- 

 posed by acids even in the cold. A small quantity of this amide must have been 



VOL. XXI. PART II. 4 M 



