LIST OF PLATES. 



The Plates illustrating this volume, as well as those of the accompanying Atlas, 

 were engraved and printed by Julius Bien, of New York. 



Peontispiece. 



Plate 



I. 



n. 



HI. 



IV. 



Y. 



VI. 



vn. 

 viii. 



IX. 

 X. 



XL 



XII. 



XIII. 



XIV. 



XV. 



XVT. 



XVII. 



XVIII. 



XIX. 



XX. 



XXI. 



xxn. 

 xxin. 



XXIV. 



XXV. 



XXVI. 



XXVII. 



XXVIII. 



XXIX. 



Shaft-landing of Savage Mine facing title. 



Washoe Sections opposite page. . 18 



Shaft Timbering do 103 



Shaft Timbering do 104 



Stope and Tunnel Timbering do 113 



Stope Timbering do 114 



Drift-car; Ventilating appliances do 117 



Hoisting Cage do 119 



Hoisting Cage, with Eccentric Safety do 120 



Mining Pumps do 124 



Oscillating Bob do 128 



Friction Gearing for Hoisting do ■. 134 



Crown Point Hoisting Works do 136 



Hale and Norcross Hoisting Works do 138 



Winding Machinery do . 



Savage Hoisting Works do. 



Sectional View of Savage Works do . 



Separator or Settler do. 



Eetorting and Melting Furnaces do . 



Two Five-Stamp Batteries do . 



Details of Stamping Machinery do. 



Grinding and Amalgamating Pans do . 



McCone's Pan do. 



Sectional View of Mill do . 



Boasting Furnace ; Amalgamating Barrel do . 



Oreana Furnaces do . 



Toyabe Sections do . 



Eeese Eiver Mines do . 



White Pine Sections do. 



Map of Gilpin County Gold Eegion, Colo- 

 rado do . 



Gilpin County Mines do. 



139 



140 

 146 

 200 

 203 

 206 

 213 

 219 

 224 

 230 

 266 

 302 

 327 

 356 

 417 



492 

 498 



