8 Dr. E. J. Mills's Researches on Melting-point. 



subsequently to myself, published an account of the deriva- 

 tive having the lower melting-point) confirms my determina- 

 tion. The substance with which I have dealt seems, then, 

 to be isomeric with Lesimple's. Trichloraniline yields a non- 

 electric powder, which, in consequence of the woolliness of 

 this body, is rather difficult to obtain. The powder cakes 

 somewhat on drying. The melting-point is exceedingly sharp, 



Table VII. 





A3. 



A t . 



A 6 . 



A 6 . 



A, 



A,. A 9 . A 9 . 





77-06 





 77-05 



77-08 : 



7706 



77-07 



7703 77-02 : 77-00 





•03 



•05 ' -05 



03 



•07 



•03 77-02 -02 





•01 



•05 -05 



•03 



•07 



•03 77-05 , -02 





•06 



•08 I -08 



•09 



•04 



•06 77-07 



•02 





•06 



•05 



•08 



•06 



•07 



06 77-02 



•02 





•09 



•08 



•08 



•06 



•10 



•03 17702 



•05 





•03 



•08 



•08 



•01 



•12 



•06 1 7699 



•02 





•03 



•02 



05 



•06 



•10 



•03 | 76-99 



•02 





•03 



•05 



•05 



•06 



•10 



•03 J 7707 



•05 





•06 



•08 



•05 



•09 



•10 



•06 7705 



•07 





•11 



•08 



•05 



•03 



•07 



•03 



77-10 



•00 





06 



•08 



•05 



•03 



•10 



•06 



7702 



•02 



Mean 



77-05 



77-06 



77-06 



77-05 



77-08 



7704 



77-04 



77-03 



Probable error . . . 



•005 



•004 



•003 



•005 



•004 



003 



•006 



■004 



Thermometer . . . 



2 



2 



2 



2 



2 



2 



2 



3 



3. Monobromaniline. — In order to prepare this substance, 

 the best commercial aniline was heated to 100° for three 

 hours with -^ part of mercuric bromide, which gave rise to 

 the formation of a trace of rosaniline. The liquid was for the 

 most part distilled off, cohobated for twelve hours with an 

 equal weight of glacial acetate, and then distilled to 130°. 

 The residue, after treatment with hot water, and pressure, was 

 powdered finely, and rapidly stirred in a large bulk of water ; 

 into this, 1*75 part of bromine was gradually introduced. 

 The brominated acetanilides thus produced were decomposed 

 with alcoholic potash, and the resulting bromanilines separated 

 by treatment with aqueous hydric chloride. The principal 

 product was dibromaniline. 



Specimens A and B were obtained by partially attacking 

 with alcoholic potash the mixed bromacetanilides ; the un- 

 attacked residue yielded no more on renewing the treatment. 

 They were crystallized several times from naphtha and spirit . 

 The remainders of A and B were further crystallized thrice 

 from spirit (A B). The mother-liquids of these preparations 



