OF SILVER. 409 



and 3 '058 is not quite fth less than the weight 

 of an atom of phosphoric acid. It is obvious 

 that neutral phosphate of silver is composed of 



1 atom phosphoric acid 3-5 



1 atom oxide of silver 14*75 



18-25 



There was an excess of oxide in the salt which 

 I obtained ; for that salt was composed of 



1 atom phosphoric acid 3'5 



I atom oxide of silver 14-75 + 2-13 



This surplus amounts nearly to fth part, which 

 I consider as too small to constitute an atomic 

 addition. 



When the yellow phosphate of silver is digest- 

 ed in phosphoric acid, we obtain a white salt, 

 which I have not analyzed, but which is certainly 

 either a neutral phosphate or a biphospate of sil- 

 ver, probably the latter. 



If we were to suppose the yellow phosphate of 

 silver a mixture of 6 atoms neutral phosphate of 

 silver and 1 atom diphosphate of silver, we would 

 obtain very nearly the same constituents that I 

 procured. For 



6 atoms phosphate of C Phosphoric acid 21 ^ 

 silver weigh \ Oxide of silver 88-5 J 



fAcid . . 3-5) 



1 atom diphosphate 33 



