on the Protochloride and Peroxide of Mercury, 511 



being such as to peroxidize the mercury ; and assuming the 

 remainder to be ammonia without loss, we have, 



)> 100-00 



100-00 



Giving a mean result of 



Mercury 83-68 



Oxygen 6 60 



Ammonia 4*10 



Water 5'62^ 



on abstracting the water, we have — 



Mercury 88-67") 



Oxygen 6*99 > 



Ammonia 4*34j 



The only analysis of this substance that I am aware of ha- 

 ving been published, is that of Guibourt, already quoted, and 

 he considers it to be a compound of oxide of mercury and am- 

 monia in such proportion that the hydrogen of the ammonia 

 could convert the oxygen of the oxide of mercury into water, 

 consequently his formula is the following (3 Hg + 2NH 3 ) and 

 the per centage result : 



Mercury 88'08l 



Oxygen 6*95 1 100-00 



Ammonia 4'97j 



with which my analyses may be considered as completely 

 agreeing. In the abstracts of Guibourt's paper that I have 

 seen, there is not any notice taken of the water present ; but 

 yet its constant value shows it to be a chemical ingredient^ and 

 we have its atomic proportion, thus — 



2Hg__405-6_83-68 



or nearly 



83-68 



3H 27 5*57 "' 5-62 



The compound (3 Hg + 2 NH 3 f 4 H) gives us in per cent, 

 composition, the following : 



Mercury 83*72" 



Oxygen 6*60 



Ammonia 4'72 



Water 4-96^ 



A result agreeing very closely with that of experiment. 



100 



