CONTENTS 



Page. 



Introduction 1 



Plan of installation 2 



METALS. 



Gold : 



Gold minerals ; . . 3 



Gold 3 



Placer gold 



3 



Quartz gold 4 



Sulpliuret gold 4 



Auriferous slate 5 



Sylvauite 5 



Gold ores 5 



Placer 5 



Quartzose 6 



Sulpburet s 



Telluride 9 



Fusion 9 



Processes of extracting gold 9 



Hydraulic gravel deposits 9 



North Bloorafield 12 



Amalgamating sulphureted ores 12 



Bob Tail Mill 12 



Smelting for several metals 13 



Newark Smelting and Refining Works 13 



Application of gold 15 



Gold leaf 15 



Iridosmine 15 



Silver: 



Silver minerals 16 



Silver 16 



Argentite 17 



Stephanite 18 



Pyrargyrite 18 



Proustite 19 



Hessite 19 



Tetrahedrite 19 



Cerargyrite '^0 



Emboli te 2O 



Sil ver ores 21 



Free-milling 21 



Roasting milling 23 



Ontario Mine 24 



Silver smelting 25 



Silver-lead smelting 26 



