ENDLICH.] 



GEOLOGY FAIR PLAY. 303 



. This last bed reaches to the summit of the moimtaiu. It is in bed 

 ISTo. 2, which is probably the equivalent of the Potsdam sandstone, that 

 all the gold, or most of it, in the region has been found, especially in 

 the lower part, where there are d.kes of volcanic rock. The gold-mines 

 of Mosquito and Buckskin Gulches are found here. All the sandstone 

 contains gold, but not in sufficient quantity to make it profitable to 

 mine. It is in bed No. 4 that the silver-bearing galena is found. This 

 limestone is lighter-colored than that on either side. It is probably a 

 part of the Quebec group. The ore occurs in segregations and impreg- 

 nations, and, as far as has been ascertained, is confined to the belt of 

 limestone represented by bed No. 4 in the section given above. The 

 accompanying map or diagram was made by Mr. Stevefis, who has 

 kindly allowed me to use it. It is not drawn on an absolutely accurate 

 scale, but will give a good idea of the various claims on Mounts Lincoln 

 and Bross. The i)rincipal ones are the Moose, the Baker, and the Hia- 

 watha. The ore, as has already been intimated, is galena, which, accord- 

 ing to the assays of Mr. Peters, carries from $3 to $200 in silver and as 

 high as $120 in gold, the coarser-grained galena always being the richer. 

 The gangue of all the mines in the limestone is barytic, both in massive 

 and crystallized form. The mines at Horseshoe Mountain are similar 

 to those of Mount Lincoln and Mount Bross. They occur in the same 

 belt of limestone, and their mode of occurrence is the same. The ore 

 is taken to smelting- works at Alma and Dudleyville, near the base of 

 Mount Lincoln. 



OKO CITY^ 



Oro City is at the head of California Gulch, a branch of the Arkansas 

 Eiver heading in the Park range. California Gulch has been the seat of 

 extensive placer-mines. At present, however, very little is done. There 

 are three or four claims being worked near Oro. The principal mining, 

 however, is done at the Printer-Boy lode. The following notes were 

 obtained from Mr. C. L. Hill, superintendent. The mine, of which a 

 diagram is shown in the illustration, is owned by the Philadelphia and 

 Boston Gold and Silver Mining Company, (J. Marshall Paul, of Colo- 

 rado, and H. M. Paul, of Philadelphia.) The discovery was made in 1868, 

 but no work was done until 1869. It was first worked by a company in 

 1870. As shown in the diagram, there are two shafts, a main one, 275 

 feet in depth, and a boundary one, 145 feet deep. These shafts are 367 

 feet apart, and between are two. levels. Above the upper one there 

 is a third level. From November, 1872, to the latter part of Sep- 

 tember, 1873, $75,000 was taken out; the average yield per week be- 

 ing 100 ounces. In September twenty-six men were employed, at $3.50 

 per day. The company owns a mill near the mine. The expenses of 

 mining and milling per week are $800. Besides the Printer-Boy, there 

 are the American Flag and several other lodes at the head of Califor- 

 nia Gulch. 



HOMESTAKE LODE, ETC. 



The Homestake lode is situated at the head of a small western 

 branch of the Arkansas Eiver, west of Tennessee Pass. The district is 

 called the Homestake district. There is a small settlement, to which 

 the name of Lake City has been given. It is just at the timber-line, 

 which here is about 11,500 feet. Besides the Homestake, which gives 

 its name to the district, there were at the time I visited the i)lace some 

 forty claims, very few, however, of any importance as yet. 



This lode was discovered in July, 1871, by W. A. Crawford and 



