I 



532 



MINING INDUSTEY. 



Name of claim. 



W. H. Cushman 



Burroughs Gold Mining Company- 

 Lacrosse 



Burroughs 



Colorado 



Conlee 



Ophir - - 



First National 



Gold Hill 



Baltimore and Colorado - 



Quartz Hill 



Gold Hill 



First National 



McCabe 



Andrew 



First National 



First National, (one-half interest) 



Length. 



267 

 155 



50 

 100 

 200 



20 

 462 



183 

 70 

 40 

 90 

 20 



233^ 

 66^ 

 90 



100 



200 



Depth reached. 



300 



220 



al^?> 



60 

 305 



30 

 560 

 265 

 128 

 200 

 240 



230 

 30 

 98 



60 



a Cut by tunnel. 



The section of the lode on Plate XXX, chiefly prepared from one made 

 in 1868 by Mr. A. Buddee, mining engineer, and supplemented by later data 

 in 1869, shows something of the development of these claims. 



Ophir Mine. — The Ophir is the deepest and most extensively worked of 

 all the mines on the lode. It is situated centrally, as regards the developed 

 portions of the vein, and may properly serve to illustrate the general features 

 of the latter. The Burroughs vein, as shown in the Ophir, resembles in most 

 respects the lodes that have already been described. The country-rock is the 

 same half-gneissic, half- granitic rock already observed. The walls are usually 

 well defined, smooth, and regular, sometimes carrying a thin gouge of clay, 

 sometimes having the seam of ore resting directly upon it without anything 

 intervening. The vein, however, is not wide as compared with other leading 

 veins, varying from 8 or 10 inches to 3 or 4 feet, seldom exceeding the latter. 



The vein-matter and the ore, consisting usually of a solid seam of the 

 latter from a few inches to more than a foot in thickness, and associated with 

 a belt of siliceous and feldspathic material highly charged with pyrites, pre- 

 sent the same general features in mode of occurrence and distribution that 



