BENEDICT. — DOUBLE HALOIDS. 227 



mond-shaped tablets, but the plane of symmetry is parallel to A, and 

 octahedral faces are all wanting.* This occurs 

 when there is a thin layer of mother liquor in 

 the crystallizing dish. Obviously, this would be 

 taken at first sight for trimetric, but measure- 

 ment of angles and stauroscopic observations in- 

 disputably prove otherwise. 



No crystals were obtained crystallizing in any manner like leaves. 

 In some cases there was obtained, when an exceedingly thin layer of 

 liquid was allowed to evaporate, an arborescent formation as a thin 

 coating on the bottom of the dish. This was SbCl 3 . 2 KG. 



The salt Jacquelaine f described as in oblique rhombic prisms, with a 

 formula SbCl 3 . 2 KG, may have been the salt described here as the 

 mouocliuic form of II., but it is rather singular that he made no men- 

 tion of the hexagonal form which is the first to be obtained. On the 

 other hand, it is quite possible that he meant the monoclinic salt, 

 SbG 3 . SbOG. 2 KG, which is the first to crystallize from molecular 

 solutions of SbG 3 . 2 KG. 



The writer is engaged in an investigation of the double salts of 

 antimonious chloride with the bivalent metals. 



* This paper, page 220. t Ibid., page 212. 



