250 



THE ROYAL SOCIETY OF CANADA 

 Table V 



The iron in the wash water and mother hquor was determined as 

 in previous estimations. In the case of the manganese the main 

 precipitate was fused with acid potassium sulphate, in a platinum 

 crucible, the fusion dissolved, and the manganese determined, either 

 by oxidizing it with sodium bismuthate and titrating with a standard 



