1862.] 313 



especially is obtained in so large a quantity from this source, that 

 M. Eugen Sell, a young chemist working in my laboratory, was 

 enabled to engage in a more minute investigation of this substance. 



The bases which accompany the monamine and diamine of the 

 toluyl-series being liquids, their separation is by no means easily ac- 

 complished. Theory suggests that this mixture consists chiefly of 

 the higher homologues of the toluyl-bases. These substances being 

 far more easily prepared from their pure hydrocarbons*, I have for the 

 present refrained from entering very minutely into the examination 

 of these oils. The following remarks are therefore exclusively devoted 

 to the fraction of the bases which boils at the highest temperature. 



On collecting separately what comes over above 330, a brown, vis- 

 cid, scarcely mobile liquid is obtained, which at the^first glance appears 

 to present scarcely sufficient interest for a more minute examination. 

 This liquid proved to be a mixture of several compounds. Treated 

 with dilute sulphuric acid it solidified into a semisolid crystalline 

 mass, which by filtration separated into a crystalline sulphate almost 

 insoluble in water, and a sulphate easily soluble, the base of which 

 forms the subject of this communication. 



Decomposed by means of caustic soda, this sulphate yielded a viscid 

 basic oil, which after some days solidified into a semisolid crystalline 

 mass. This was purified from adhering oil by pressure between 

 folds of bibulous paper, and crystallized first from water, and subse- 

 quently once or twice from boiling alcohol. Long white silky needles 

 were thus obtained easily soluble in alcohol and ether, difficultly 

 soluble in water, fusible at 192, and boiling beyond the range of 

 the mercurial thermometer, but distilling without decomposition. 



When submitted to combustion, this substance was found to contain 



C 6 H 7 N, 



and thus to have exactly the same composition as aniline, from which 



* I may mention in passing, that dinitrocumol, C 9 H IO (N0 2 ) 2 obtained by sub- 

 mitting cumol to the action of a mixture of nitric and sulphuric acids, when di- 

 stilled with iron and acetic acid, yields cumylene-diamine, a beautiful crystalline 

 base, 



fusible at 47, the composition of which was determined by the analysis of the 

 base itself and of the platinum-salt. 



