50 KANSAS CITY REVIEW OF SCIENCE. 



9 

 known rich mining districts, having each its own particular town or outlet as 

 follows: Ouray, having the Sneffels, Uncompahgre, Bear Creek, Red Mountain 

 Gulch and Poughkeepsie Gulch mines tributary to it ; Lake City, having the rich 

 mines of Hensen Creek, Engineer Mountain, and a large number immediately 

 around the town itself; San Miguel, haying the celebrated gold and silver mines 

 of Marshall Basin, Ingram Basin, Bear Creek, Turkey Creek, and twenty miles 

 of placer claims on the San Miguel River; Ophir, having its own rich mines all 

 around it; Rico, being the center of all the mines of Dolores County, and hav- 

 ing an outlet by the Denver & Rio Grande Railroad near Durango, and at a dis- 

 tance of about twenty-eight miles. With the exception of the latter, all these are 

 tributaries to the main line of the Denver & Rio Grande Railroad. Silverton has 

 tributary to some remarkably good mines immediately around the town, and 

 those of Cunningham Gulch, Eureka Gulch and Animas Forks, and has its out- 

 let, as aforesaid, by the Denver & Rio Grande Railroad, now under construction 

 from Durango to Silverton. Production for this region in 1880, $891,042. 



JEFFERSON COUNTY. 



The smelting-works at Golden are worked to their full capacity. The mines 

 of Gilpin and Clear Creek Counties are sending them large quantities of ore, 

 and there is received from the Robert E. Lee mine, of Leadville, one car of ore 

 per day, which yields from $100 to $600 per ton. 



LAKE COUNTY. 



The mines in and around Leadville continue in the flourishing condition 

 noted for some time past. The roads which at this season of the year are generally 

 impassable on account of the melting snow, are reported in excellent shape, and 

 the large shipments from the mines are maintained. 



The report of the smelters for the quarter ended March 31st is a gratifying 

 one, showing the aggregate product to have been $4,031,433, as against $3,097,- 

 820 for the same last year — an increase of nearly one million dollars thus far this 

 year. This shipment is the largest ever made by the mines during the same 

 length of time ; and as the smelters have large quantities of ore on hand, and 

 the mines are increasing their output, it may be taken as an indication that the 

 product of the Leadville mines for 1882 will largely exceed that of any previous 

 year. The mines are in good condition, and the shipments large and steady. 



One of the most convincing indications of Leadville's prosperity is the large 

 stocks on hand at the smelters, which, although working to their utmost capacity, 

 can not treat all the ore they receive, and are accumulating large quantities in 

 their bins and yards. The mines of Fryer Hill continue to be the leading fea- 

 tures of interest, though there is a large increase in the output of the Carbonate 

 Hill mines. Production for the census year, $82,687 in gold, $13,326,999 in 

 silver. 



