224 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



Designating the salts by Roman numerals : — 



SbCl 3 . SbOCl . 2 KCl I. 



SbCl 3 . 2 KCl [hexagonal] II. 



SbCl 3 . 2 KCl . 2 H 2 III. 



During these experiments a number of mixtures of the two salts 

 were crystallized in dishes under varying conditions. 



Regarding salt I. (SbCl 3 . SbOCl . 2 KCl), the evidence indicated 

 that it crystallizes best from solutions by spontaneous evaporation in 

 a cool place. Solutions should be preferably not too concentrated, and 

 contain no large amount of free acid, i. e. no acid used in assisting 

 the solution. 



The hexagonal salt II. (SbCl 3 . 2 KCl) results by evaporating either 

 by heat or a vacuum desiccator a solution of almost any proportion 



