Jackson.] 342 [October 4, 



lead and silver, and a black ore quite soft, fine grained, containing 

 arsenic, antimony, lead, sulphur and silver. 



The above varieties of ores occur in places where the vein is hard 

 and compact, but a large portion of them are decomposed and occur 

 in the vein apparently mixed up with vein stuff; where this occurs 

 the vein is soft and requires no blasting, and when the ores are taken 

 out they resemble coarse sand slightly stained with oxide of iron. 



The ore that has been shipped from this mine will average about 

 35 per cent, of lead and contains from 100 to 190 ounces silver to 

 2000 lbs; perhaps 150 ounces would not be far from the actual 

 average. 



I have assayed specimens of galena from this mine which con- 

 tained 450 ounces silver to the ton, and others of the antimonial 

 galena carrying as high as 520 ounces. One peculiarity of the ores 

 from this mine is, that the percentage of silver in the ores is 

 constantly varying, and bears^no ratio whatever to the amount of 

 lead contained — for instance, one piece of galena contained 94 

 ounces silver to the ton, while another specimen identical as to looks 

 and the per centage of lead, contains 150 ounces. But as I did not 

 intend to particularize, I must pass on. 



There are two or three districts where silver abounds in ores 

 free from lead. The principal district producing what are classed 

 here as milling ores is East Caiion, situated some fifty-three miles south- 

 west from the city. The ores found in Ci this district" are quite rich in 

 silver. The silver exists in the form of horn silver, chloro-bromide, 

 carbonate of silver and decomposed antimonial silver ; as yet no sul- 

 phide of silver has been found that I am aware of. I have some very 

 fine specimens of horn silver from this district, also some from " Tin- 

 tic" some seventy-five miles south-southwest from here. I have found 

 specimens carrying as high as 60 ounces of silver. Copper is not very 

 abundant; however, there are several localities in which it occurs in 

 paying quantities. At "Tintic" they have a very large deposit, the 

 ores are principally carbonates, and some very fine specimens of 

 azurite are found. I am inclined to think that at a depth the ores 

 will change, but what they will be below water level is hard to tell. 

 There is one species of ore from this locality which resembles stib- 

 nite somewhat in looks and in the form of crystalization but it con- 

 sists of arsenious acid and copper ; as yet I have not had an oppor- 

 tunity to fully analyze it. There are some ores also in the "Cotton- 



