24 



Dr. Kane on the Compounds of Ammonia. 



portion of precipitate obtained, differing but very little in shade, from the 

 first ; this having been likewise collected, the liquor was treated by a third quan- 

 tity of water of ammonia, by which a precipitate was produced of a dark grey 

 colour ; after this had been removed, the remaining liquor was completely de- 

 composed by an excess of water of ammonia, and thus a precipitate of a grey 

 colour was obtained. 



There had been thus collected, from the one solution of protonitrate, four 

 portions of precipitate, which had gradually become lighter in colour according 

 as the quantity of ammonia added had increased ; numbering them in the order 

 in which they had been prepared, they were subjected to analysis : 



A. 7.748 of No. 1, dissolved in muriatic acid, gave, by proto-chloride of tin, 

 6.374 of mercury, or 82.27 per cent. 



B. 9,456 of No. 1 gave, treated in a similar manner, 7.791 mercury, or 

 82.39 per cent. 



C. 6.403 of No. 2, dissolved in muriatic acid, and decomposed by proto- 

 chloride of tin, gave 5.410 mercury, or 84.49 per cent. 



D. 7.093 of No. 3 gave, by proto-chloride of tin, 6.141 of mercury, or 86.7 

 per cent. 



E. 7.943 of No. 4 gave, similarly treated, 7.067 mercury, or 88,97 per 

 cent. 



These results, tabulated, are : 



The result of Mitscherlich's analysis are shown here, in order to understand 

 how far his numbers are reconcileable with mine ; he obtained 



98.73 



