138 Journal of the Asiatic Society of Bengal. [February, 1907.] 



In tbe present instance a basic mercnroso- mercuric nitrate 

 has been formed, in wbicb a part of the mercurous itiercury has 

 been replaced by silver. Evidently we have here a remarkable 

 case of isomorphism. I am not aware of any instance in which 

 univalent mercury is isomorphously replaced by silver. 



:fS 



