THE COMSTOCK MINES. 157 



In the accounts just given of the Chollar-Potosi it should be observed 

 that all ore extracted came from the old works, (excepting 119 tons in 1868,) 

 and little, if any, was hoisted from any considerable depth, but run out to the 

 surface by way of tunnel. The costs of sinking the new shaft, in the eastern 

 country-rock, and of prospecting the ground in connection with it, are stated 

 in such manner as to show the expense, per ton of ore produced, for carry- 

 ing on that work ; but of all the ore in question only 119 tons came from the 

 shaft or connected works, the whole, with the exception above made, having 

 been produced, as first stated, in the old mine. 



The work performed at the new shaft for the outlay shown in the fore- 

 going accounts was, during year ending May 31, 1868, as follows: 



Feet. 



Sinking vertical shaft, from a depth of 651^ feet to a depth of 930 feet, 

 in.aU 278^ 



Sinking the inchne shaft from bottom of last named, (including cost of 

 timbering, repairs, placing pumps, and operating hoisting works) 241 



Sinking winze ' 106 



Drifting 1,278 



Costing, as shown in statement, $106,960 59 



In addition to which there was expended for machinery and fi-eight 25,105 27 



The work performed in this department, during the year ending May 

 31, 1869, was as follows: 



Feet 



Sinking the incline, below point already reached, 1,169 feet from sur- 

 face to point, 1,392 feet from surface 223 



Drifting on 500-foot station 514 feet. 



Drifting on 920-foot station 280 feet. 



Drifting on 1,000-foot station 145 feet. 



Drifting on 1,100-foot station 994 feet. 



Drifting on 1,240-foot station 330 feet. 



Total .-. 2, 263 feet. 



