PLATE III. 



COPPER. LEAD. BISMUTH. 



Cupric sulphide or lead sul- 

 phide, precipitated from solutions of 

 copper or lead by hydrogen sulphide. 



Cupric hydroxide passing into 

 cupric oxide. Cupric solutions pre- 

 cipitated by potassium hydroxide and 

 boiling. 



Cupric solutions treated with 

 ammonia water. 



Cupric carbonate, precipitated 

 from cupric solutions by sodium car- 

 bonate. 



Cupric ferrocyaiiide, precipita- 

 ted from cupric solutions by potassium 

 ferrocyanide. 



Lead iodide, precipitated from 

 lead solutions by soluble iodides. 



Lead solutions with soluble chlo- 

 rides, sulphates or carbonates. Bis- 

 muth solutions with alkali hydrox- 

 ides or carbonates. 



Bismuth sulphide, precipitated 

 from bismuth solutions by hydrogen 

 sulphide. 



