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Show 68 district was discovered in May of the present year, by Jerome Childs. It was organized in July, and has been worked since that time. It may be reached from Galiente by following the road of the Gerro Gordo Freighting Company to Tate's Station, and thence to the district, distance 156 miles. Or another route is by way of the Olancha, Independence, and Galiente road to Darwin, 152 miles, and thence by pack- trail to the district, 12 miles. As far as discovered, the lodes and deposits have no definite direction. They are found in a belt of limestone, 3 miles wide, which runs from north to south. The veins are richest in white limestone. When they approach the granite, the ore changes from galena to copper- galena in schist is found in the granite. The country- rock along the summit of the range, from Shepherd's Gaiion to a few miles south of Darwin, is granite; thence to Darwin Wash it is slate. At an altitude of ' 5,000 feet limestone appears, and at irregular intervals on the eastern slope granite and limestone occur. Some ores are reduced by smelting, others by the milling process. Galena is the principal product. The base metals are lead, iron, and a little copper. Assays from the mines on Lookout Hill average $ 150 per ton. The assay yield, in general, varies from $ 25 to $ 3,000 per ton. Iron is a constituent of some ores to the extent of 30 or 40 per cent. Gold is present, sometimes to an important degree, and 12 or 14 locations of gold ledges have been made. Some assays have shown $ 9,000. The iron sulphides are reduced by the roasting process. About 60 locations have been made, most important of which are the Lookout, Minnietta, Modoc, Confidence, Minute Gun, Lone Star, Antelope, Bismuth, Capital, Royal Arch, and De Soto. The Lookout and Confidence, on the north side of Lookout Hill, run nearly parallel and a little north of east. The Modoc, on the south side, runs southeast. The ledges apparently bear toward the center of the hill. The Lookout and Minnietta contain galena that is nearly pure. Gray carbonate and chloride are also found in the Minnietta. Quartz shows most plainly in the Confidence. In general, a great amount of ore is in sight along the ledges, but the mines are not yet sufficiently developed to decide concerning the permanency of the vein. A granite vein thrusts out of the limestone at one- half mile below Silver Springs. A ten- stamp mill, erected in the district, will cost* $ 50,000. This would be greatly decreased by the completion of the Los Angeles and Independence Bailroad. Cost of mining or milling labor per diem is $ 4. Cost of sinking a shaft is $ 10 or $ 12 per foot. Supplies are brought from the railroad at Caliente, and from Owen's Biver Valley, by way of Darwin. Timber is 8 or 9 miles distant. Water is obtained chiefly from springs. The Minute Gun Spring, above the principal mines, flows two inches of water, miner's measurement; Silver Spring, on a level with the mines, is of equal size, and the Lillian Spring yields one inch of water. Other supplies could be brought in pipes from Egau's Falls on the north, or Snow's Gaiion on the south. There is but little game in the district. It is peopled by 40 persons. The roads are poor. No freight- lines are yet organized. TEMESCAL TIN MINES, CALIFOBNIA. Examined by Lieut Uric Bergland, May 4,1S76. These mines, not worked at present, are in the southern part of San Bernardino County, on the southwestern slope of the Temescal Mount- |
