II. 



MANGANESE. CHROMIUM. 



Potassium permanganate solu- 

 tion, more or less saturated. Borax- 

 bead colored by manganese. 



Mangaiioug sulphide, precipi- 

 tated from manganous solutions by 

 ammonium sulphide. 



_ 



Manganous hydroxide passing 1 

 into the higher oxides. Manganous 

 solutions precipitated by alkali hy- 

 droxides. 



Potassium dichromate solution 

 deoxidized by reducing agents. 



Chromic hydroxide, precipitated 



from chromic solutions by alkali hy- 

 droxides. 



Lead chromate. precipitated from 

 soluble chromates by lead acetate. 



Silver chromate, precipitated 

 from neutral chromates by silver ni- 

 trate. 



Mercurotis chromate, precipi- 

 tated from neutral chromates by mer- 

 curous solutions. 



