46 



SMITHSONIAN INSTITUTION 



Fig. 2>7- — Silver mass from Keeley Mines, Silver Centre, Ontario. Weight 

 263 pounds, estimated to be 80 per cent pure silver. 



VTS*- 



B*' 



1|«.; 



»■$$; 



A Hi 



1 



Fig. 38. — The vein here shown varies in width from 6 to 25 centimeters, 

 consisting of silver and calcite. 



