90 PROCEEDINGS OP THE AMERICAN ACADEMY 



may easily be modified to suit this view, and will all be symmetrical, 

 and suggestive of various possible isomerisms. 



The study of other complex inorganic acids will, doubtless, throw 

 further light upon the subject, and to it I shall continue to devote my 

 leisure. It already begins to appear that inorganic compounds may 

 possess an unexpected degree of complexity, and that very wide fields 

 of research in inorganic chemistry are still open. 



(7b he continued.) 



