VII. On a new Compound of Chlorine and Cyanogen. 

 By James Stenhouse, Esq.* 

 T^HIS somewhat remarkable compomid may be obtained by 

 -*- two processes, both of which I shall now minutely de- 

 scribe. The first way in which I obtained it was by decom- 

 posing an alcoholic solution of bicyanuret of mercury by dry 

 chlorine gas. The method of proceeding is the foUowino-. 

 Four or five ounces of bicyanuret of mercury should be finely 

 powdered, and introduced into a tubulated retort, and the 

 same weight of strong alcohol poured over them. It is proper 

 to agitate the mixture for some time, and even to heat it a 

 little, in order to saturate the alcohol completely with the 

 salt. The retort is then to be kept as cool as possible by 

 being placed in a vessel of cold water, a copious stream of 

 which is to be kept falling upon it during the whole process. 

 The chlorine to be introduced into the solution of the bic\'- 

 anuret of mercury must be dried, by being passed through an 

 intermediate vessel containing sulphuric acid : it may then be 

 conveniently introduced into the solution by a lube passed 



* Communicated by the Author; liaving appeared in Lich'tg s Annalen 

 for January, 1840, 



