283 



A few quinine-salts of the formula 



2(C 20 H 12 N0 2 ), HX 



were considered as anomalous, as basic compounds ; and it was not 

 until the methylic and ethylic derivatives of quinine, 



2C 20 H 12 N0 2 ,C 2 H 3 I and 



2C 20 H 12 N0 2 ,C 4 H 5 I, 



had been discovered that chemists began to consider the formula 



C 40 H 24 N 2 4 



as a more appropriate expression for the molecule of quinine. 



Probably further examination of the salts of ethylene-phenylamine 

 I retain this name for the present will furnish saline compounds 

 corresponding to the methyl- and ethyl-derivatives, showing that this 

 base, like quinine, is capable of forming two groups of salts. 



It deserves to be noticed that the diammonic nature of ethylene- 

 phenylamine is also strongly marked by its deportment under the 

 influence of heat ; for while all the monammonic basic derivatives of 

 aniline are volatile without decomposition, ethylene-phenylamine, 

 when submitted to distillation, is destroyed with reproduction of 

 aniline, like the well-established diamines belonging to this group, 

 melaniline, formyl-diphenylamine, &c. 



In describing the preparation of ethylene-phenylamine, it has been 

 mentioned that the action of bibromide of ethylene on aniline gives 

 rise at the same time to two other basic compounds. These sub- 

 stances, which are formed in smaller quantity, differ in a very marked 

 manner from the principal product of the reactions. Their study is 

 not yet completed, but it may even now be stated, that they have 

 the same composition as ethylene-phenylamine itself. One of these 

 substances, remarkable for its solubility in spirit, is capable of being 

 converted into ethylene-phenylamine by a simple molecular change. 

 The relation in which these three isomeric bodies stand to each 

 other is not yet finally fixed by experiment. The idea suggests itself 

 that it may possibly be represented by the formulae 



Solublebase C 16 H 9 N. 



Ethylene-phenylamine C 32 H 18 N 2 . 

 Insoluble base C 48 H 27 N 3 . 



