252 PROCEEDINGS OF THE AMERICAN ACADEMY 



aqueous solution of the chloride is boiled with argentic oxide, it be- 

 comes strongly alkaline, but it is necessary to boil for some days in 

 order to convert it completely into the free base. 



Dlhenzyldimethylammonic CJilorplatinate, [ ( C^H^ ), ( CHg) jNJ^P tClg. 

 — This substance was prepared by adding an alcoholic solution of the 

 chloride to chlorplatinic acid, and purified by recrystallizing from 

 water. Its composition was determined by the following analysis. 



0.2012 gr. of the salt gave 0.0454 gr, of platinum. 



Calculated for [(C,H7)2(CH3)2N]2PtCl6. Found. 



Platinum 22.64 ' 22.56 



It is nearly insoluble in cold water, but crystallizes from a hot 

 aqueous solution in large shining yellow plates, often a centimeter in 

 length, or in feather-like forms. 



