MURIATES AND CHLORIDES. 229 



ing these well known substances. Their con- 

 stituents, as determined by numerous experi- 

 ments, are as follows : 



(1.) Calomel or protochloride of mercury, 



1 atom chlorine 4--5 



1 atom mercury . 25 



295 



( 1 2.) Corrosive sublimate or perch! oride of 

 mercury, 



2 atoms chlorine . 9 



1 atom mercury 25 



34- 



Chenevix's analysis of calomel is very near the 

 truth, but his analysis of corrosive sublimate is 

 not quite so accurate that of Zaboada is the 

 best which I have seen. 



19. Neither does the oxide of silver combine chloride ot 

 with muriatic acid. The precipitate from nitrate S1 

 of silver by common salt, when well washed and 

 dried in the open air, loses, when fused, about 2 

 per cent, of water. Now, this small fractional 

 part of an atom of water can only have been 

 mechanically attached to the precipitate. This 

 precipitate is a chloride of silver, composed of 



1 atom chlorine . 4'5 



1 atom silver 13-75 



18-25 

 PS 



