CENTRAL AND EASTERN NEVADA. 401 



from 2 to 6 feet thick, and sometimes thicker, dipping eastward at 30°, or 40° 

 on the south end of the openings, and steeper on the north end. The inclosing 

 rock at the El Dorado is a hard quartzite, mixed in places with bands or belts 

 of slate. Further north, as at the Arizona, the inclosing rocks are more slaty 

 in structure and general character. The general course of this ledge is north 

 15° to 20° west, true ; and the various claims above named, regarding them 

 as on one vein, cover several thousand feet. The El Dorado South own 2,000 

 feet, and have extracted from surface workings near the croppings a large 

 amount of " chloride ores," yielding from $150 to $300 per ton, and even more. 

 This work is said to have been the source of great profit to the owners. In 

 depth the vein had not been extensively wrought. A shaft, or incline, had been 

 sunk 130 feet, showing a large vein of quartz, carrying a good deal of ore ; but 

 at the time referred to, operations were confined to the surface-diggings, which 

 were very rich in chloride of silver. 



Adjoining this claim on the north is the El Dorado North, which has less 

 development, but very good prospects. The Atlanta, the Arizona, and some 

 others have opened this vein still further north. The Arizona was at work in 

 June, 1868, and was producing some excellent ore from within 50 or 60 feet 

 of the surface. The developments were not extensive, but were deemed very 

 encouraging. 



The principal mining developments of this region are centered in the 

 locality of the veins described in the foregoing paragraphs. There are, how- 

 ever, in addition to these, many locations of promise, some in the immediate 

 vicinity, others within a few miles, chiefly along the slate belt, some of which 

 will probably become important. The Spanish district, seven miles north and 

 west of the region just described, is very well spoken of, but was not visited 

 by the writer. 



Combination and Belmont Mills. — There are two mills in the vicinity 

 of Belmont; one belonging to the Combination Company, the other to the 

 Belmont Company. The former is a large, handsomely-built establishment, 

 not far from the mine. It was completed early in 1868, at a cost of not less 

 than $225,000. The methods of treatment, both wet and dry, are the same, 

 in aU essential features, as those already described elsewhere. A few notes 

 51 



