ILLUSTRATIONS. 
Page. 
Plate I. Geologic map of Tonopah mining district 7 
Fig. 1. Plan of portion of Mizpah vein 18 
2. Map showing outcropping veins at Tonopah 19 
3. Detailed vertical section of one of minor Valley View veins 22 
4. Ideal cross section of Tonopah rocks 26 
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