SULPHITATIOX 



Effect of Quantity. 



297 



The filtrate became bright %vith 3-0 per cent, of Xorit. 



Effect of Temperature. 



Effect of Duration of Contact. 



Time, 

 mins. 



Per cent. 



colour 

 removed . 



Time, 

 mins. 



Per cent. 



colour 

 removed. 



Effect of Reaction. 



