1 2 ILLUSTRATIONS. 
Page. 
Fig. 12. Plan and longitudinal section of the workings of the Aspen mine, 
Hazleton Mountain 162 
13. Sketch plan of underground workings of the North Star (King Solo- 
mon ) mine . . . . ... . . . 164 
14. Cross section of the Tomboy and Iron lodes through No. 2 raise, be- 
tween the 600-foot and 200-foot levels 209 
1"). Cross section of the Tomboy and Iron lodes through No. 12 raise on 
the Iron lode and a neighboring raise (projected) on the Tomboy 
lode ... '. 210 
16. Longitudinal and transverse sections through the Guston mine 224 
17. Plan of a portion of the underground workings of the Genesee- 
Vanderbilt mine 228 
18. Plan of fourth level of the Genesee-Vanderbilt mine, showing method 
of prospecting for ore bodies with the diamond drill 229 
19. Sketch plan showing changes in position of the Genesee-Vanderbilt 
ore bodies with depth 230 
20. Sections through the National Belle mine, showing ore bodies stoped 
and natural ore caverns . ....... 232 
21. Sections through the Silver Bell mine, showing ore bodies stoped .. 237 
22. East-and-west section through the Saratoga mine (after G. E. 
Kedzie) ... . 242 
23. Diagrammatic east-and-west section, illustrating in a general way 
the occurrence of ore in the Saratoga mine 243 
