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Show 65 locations of mineral deposits, containing silver in quantity, have also been made in^ or near Grapevine Canon, and named Armstrong district. None of these ledges have been developed, and very little work has been done. The outcrop at the U- be- he- be district is encouragingly spoken of, but at present the region is not very accessfble. SUMNER DISTRICT, CALIFORNIA. Examined by Douglas A. Joy, October, 1875. This district lies about 1 mile north of Kernville, on the west side of the North Fork of Kern River, on the eastern slopes of the foot- hills leading down into the canon of the same. Its post- office is Kernville. It is 40 miles to the railroad at Oaliente, with which town it is connected by freight and stage lines. Gost of freight from that point, 1£ cents per pound. The roads are very good. The veins are true fissure- veins, with slickensided walls. The wall-rock is granite. The adjacent country is of azoic formation. Ores are worked by milling and amalgamation. The average assay in the Sumner lode is $ 16 per ton. The bullion consists of 66 per cent, gold, 31 per cent, silver, and 3 per cent, of base metals. A newly- discovered lode, the Mineral King, is said to assay from $ 100 to $ 400 per ton in silver and $ 50 in gold. In the Sumner lode the rock is principally a gold- ore. The quartz contains free gold, ruby silver, and pyrites. Antimony, arsenic, and iron are the base elements. Water- level is reached at a depth of 118 feet. In the Sumner Mine the shaft is 290 feet deep, with 3 levels, each 300 feet in length. The vein is from 30 to 40 feet in width. A plunger- pump is connected with this mine. The vein of the Mineral King is 22 feet in width, and contains ruby silver and free gold. It was struck at a depth of 109 feet. Its tunnel is 50 feet in length. At these mines there is one mill with 80 stamps and one with 16. Each stamp weighs 900 pounds, and makes 80 drops per minute. Each stamp will crush a ton of ore per day. There are six pans and settlers. Amalgam is strained cold. The mill is run by the water- power of Kern Eiver. Cost of milling and mining labor at Kernville is $ 3 per diem. Grain is 4 cents per pound. Good pine timber grows on the surrounding mountains. The water of Kern River is abundant and good. There are 1,200 inhabitants in the district, including Kernville. Domestic animals are numerous, and game is not scarce; the deer, bear, quail, and cab bit are found. BOSS SPRING DISTRICT, CALIFORNIA. Examined by Lieut Rogers Birnie, jr., 1875. This district is in thePanamint Range, between Panamint Valley and Death Valley. It is bounded on the north by Gottonwood Gaiion and \ on the south by Kose Spring Gaiion. The ledges lie in the main range I and in the foot- hills and spurs which slope into Death Valley on the east. The district is of irregular shape. Its outcroppings and developments |