510 Dr. Hofmann 07i the Metamorphoses of Indigo. 



The oblique rhombic prism 2 ^ is terminated by the end 

 planes c in such a manner, that the crystals present a tabular 

 appearance. The acute edges of the prism are truncated by 



the planes d and g. The planes g do not present themselves 

 at all, or if so, it is in the form of small triangles. 



From the measurement of the angles result the following 

 relation between the axes: — 6 : a : c=l : 0*989 : 0'84<3, and 

 the angle between the axes c and 6=72° 20'. 



This salt is isomorphous with the hydrochlorate of chlorani- 

 line. It belongs to the same crystalline system, and is formed 

 by the same planes. Still the character is somewhat differ- 

 ent, viz. the crystals are less extended in the direction of the 

 axis 6, so that the horizontal edge, in which the two planes a 

 cut each other, disappear, and the two planes d with the two 

 g form a four-sided summit: the angle of the prism 2 gx 2^ was 

 Tound here = 127° 48'. The angles of this salt however can 

 not be so well measured as in the analogous one. 



The analysis of the hydrochlorate of bromaniline gave the 

 following results : — 



1*1425 grm. of the salt gave 0'798grm. of chloride of silver. 



This corresponds to the formula CI H, C-^^< r> ^ k N, 

 shown by the following calculation : — 



as is 



Theory. 



1 equiv. Base .... =2130-35 82-40 

 1 ... Hydrochloric acid = 45515 17-60 



1 ----- ~ 



Experiment. 



17-71 



100- 



Hydrochlorate 1 2585-50 

 ot rSromanihne J 



Bromariiline and Bichloride of Platinum^ 

 ClH,C,,|g«|N+Cl,Pt, 



is precipitated by mixing hydrochlorate of bromaniline with 

 bichloride of platinum, and cannot be distinguished either 

 in its relations or aspect from the platinum salt of the cor- 

 responding chlorine base. The analysis already given by 

 the determination of the atomic weight furnished 26*19 per 



