CHAPTER IX. 



GOLD MINING IN COLORADO 



Section I. — Gilpin county gold veins — Bobtail, Gregory, bates, Illinois, 



GARDNER, BURROUGHS, FLACK, CALIFORNIA, WINNEBAGO. 



Section II. — Treatment of the ores — Milling — Smelting — Bullion product 



OF GILPIN COUNTY. 



This cbapter will be devoted to a description of the present condition of 

 mining industry in Gilpin County, where, as already shown, the principal 

 gold-producing mines of Colorado are located.^ 



This county, the smallest in the Territory, lies on the eastern slope of 

 the mountains, and covers the area of country that is drained by North Clear 

 Creek and its tributaries. The accompanying map, on Plate XXIX, presents 

 the main topographical features of the region referred to,^ The extent of 

 country indicated in this map is about six miles long, east and west, by about 

 four miles wide, north and south. 



Central City, located at the junction of Spring, Nevada, and Eureka 

 gulches, is, as its name may imply, the center of mining activity. The most 

 important and best developed lodes of the region are grouped about this point 

 within a circle of two or three miles in diameter. A great number of veins 

 have been discovered and prospected within this area, and some of them have 

 been extensively developed, a fact clearly indicated by the many mining works 



^ The writer takes occasion liere to express his acknowledgment to many gentle- 

 men residing in the mining regions of Gilpin County for their courteous attention and 

 aid in obtaining desired information ; he is especially indebted to Professor N. P. 

 Hill, Mr. H. B. Brastow, Mr. G. L. Bradley, ]Mr. A. von Schultz, Mr. J. Alden 

 Smith, Mr. Joseph Thatcher, and Mr. Frank Young. 



^ The map here given has been prepared chiefly from one made and published by 

 Messrs. Morse and Hill, engineers residing at Central City ; and from topographical 

 details furnished to the writer by Mr. A. N. Eogers, an experienced topographer, 

 superintendent of the Bobtail mine. 



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