LOUD BYKON AND KELLY MINES. 



313 



connection with the fissures and pipes, is admitted by all who have care- 

 fully studied the deposits. Occasionally the ore contained in small pockets 

 in the limestone will present a fairly uniform composition, but differing 

 widely from that found in adjacent bodies, and in some of these zinc and 

 copper accumulate in relatively large quantities as compared with the 

 entire mass of ore. Such variations appear to be much more common on 

 Prospect Ridge than on Ruby Hill. 



Two of the most singular and interesting of these isolated deposits 

 were found near the summit of Prospect Ridge, on two adjoining mining 

 properties, known as the Lord Byron and Kelly mines. They resemble 

 each other so closely that they may very properly be considered as having 

 a common origin and possibly filling the same fissure, the connection 

 between them being concealed beneath the surface. 



The following analyses of these complex ores were kindly made for 

 the. writer by Dr. W. F. Hillebrand, of the U. S. Geological Survey: 



