16 



Copper continued. 



Treatment of the refinery slag. 



Kratz smelting. 



Miscellaneous foreign operations. 

 Various forms of copper. 

 Results of treating copper in various ways. 

 Defects in copper. 



Wearing of copper sheathing in use in Her Majesty's Navy. 

 Alloys of copper. 

 Copper and its alloys in use. 

 Defects and wearing of brass. 

 Special applications of copper. 



Zinc : 



Experiments. 



Zinc ores. 



Products of the operations for the extraction of zinc. 



Metallic zinc. 



Alloys of zinc. 



Products of the process of " galvanizing iron with zinc. 



Lead : 



The properties of lead experimentally illustrated. 



Ores of lead. 



Illustrations of lead smelting. 



Accidental products. 



Pattinson's process for the extraction of silver from lead. 



Parke's process of desilverization. 



Cordurie's process. 



Purification of hard lead. 



Lead fumes. 



Illustrations of the smelting of complex ores containing 



lead and other metals, as carried 011 in the Har/. 

 Lead working near Freiberg, 

 Miscellaneous foreign lead smelting. 

 Samples of metallic lead. 

 Defects and corrosions of lead. 

 Alloys of lead. 



Various uses of lead and its alloys. 

 Type metals. 



Silver : 



Experiments. 



Silver ores. 



The smelting of silver ores. 



Amalgamation processes. 



Refining silver by cupellation. 



