AMIDES OF THE FATTY ACIDS. 



307 



Carbon, 



Hydrogen, 



Nitrogen, 



I. 



76-74 



12-94 



II. 



76 65 

 12-89 



ill. 



5-02 



IV. 



4-85 



Mean. 



76-70 



12-92 



4-94 



Cod-Liver Oil. 



Cod-liver oil requires to be digested for a considerable time with ammonia 

 before it is acted upon. It does not yield very much amide, but a considerable 

 quantity of an oily and resinous matter is obtained from the mother liquor. It 

 is very soluble in alcohol, and when dry presents similar appearances to the 

 amides previously described ; but its analysis gives results Avhich at present I 

 cannot explain, and on that account I have not given it either a name or formula. 

 It fuses at 93° C, and becomes solid and transparent at 91° C. 



The following are the numbers obtained : — 



Carbon, 



Hydrogen, 



Nitrogen, 



I. 



II. 



III. 



IV. 



V. 



I. 

 75-60 

 13-03 



2150 grammes 



5960 



2534 



2114 grammes 



5875 



2465 



4740 grammes 

 0205 



4360 grammes 

 0193 



3305 grammes 

 0142 



II. 



75-79 

 12-95 



of substance gave 

 of carbonic acid, and 

 of water. 



of substance gave 

 of carbonic acid, and 

 of water. 



of substance gave 

 of nitrogen. 



of substance gave 

 of nitrogen. 



of substance gave 

 of nitrogen. 



III. IV. 



4-32 



4-42 



V. 



429 



Mean. 



76-70 



12-99 



4-34 



On comparing these results with those obtained from the other amides, it will 

 be seen that the carbon and hydrogen would correspond with the formula for 

 margaramide, but the nitrogen is nearly one per cent, too low ; the fusing point 

 is also much lower than that of this amide. It likewise remains transparent 

 when cold, which is a property belonging to oleamide, whilst the margaramide 

 becomes opaque and somewhat crystalline when cold. It is my intention to 

 make another examination of this oil, in order to ascertain the cause of these 

 unsatisfactory results. 



As it is my intention to continue this investigation, and also to examine the 

 products of decomposition of these amides, I shall at present confine myself to a 

 few remarks. 



From the results of the analyses it appears that linseed, poppy, and croton 

 oils yield margaramide, whilst oleamide is obtained from almond and seal oils ; 

 and, according to M. Bouis' experiments, ricinolamide is obtained from castor 



VOL. XXI. PART II. 4 N 



