Fig. 8 Photomicrograph of rusty gneiss close to ore, Hendricks mine, with irregu- 

 lar masses of pyrite scattered through quartz, pyroxene, chlorite and sericite. A 

 little mica and a few flakes of graphite are present. (Magnified 27.5 diameters) 



Fig. 9 Photomicrograph of lean ore, Hendricks mine. Large masses of pyrite, 

 bounded by sharp crystal faces, with quartz, chloritized mica and a little rutile. 

 (Magnified 27.5 diameters) 



