220 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



fact that the per cent of chlorine in SbCl 3 is 47.04, in KC1 is 47.53, 

 and in this salt is 47.20, it is evident that an excess of potassic chloride 

 would explain the discrepancy from the calculated results, and not ma- 

 terially interfere with the per cent of chlorine. 



The crystals of this salt are, as has been stated, hexagonal plates. 

 These plates pile up in layers, leaving the prism faces very much 

 striated. This process of formation would tend to the occlusion of 

 mother liquor rich in potassic chloride. As a matter of fact, a micro- 

 scopical examination of the smallest, clearest, and most perfect crystals 

 revealed numberless cavities with air bubbles and bubbles of liquid. 

 This was the only salt in which such cavities and bubbles were found. 



SbCl 3 . 2 KC1 [Monoclinic]. 



