Puare IX.

ie

A. Microphotograph of polished ore from the Silver
Standard mine. High grade ore, magnified 395 diam-
eters. 1, zinc blende; 2, tetrahedrite (freibergite); 3,
chalcopyrite); 4, galena. (Page 32.)

B. Silver Cup basin. North side of Ninemile
mountain. (Page 34).