Annual Report of the United States Geological Survey to the Secretary of the Interior, Part 3U.S. Government Printing Office, 1895 - Forest reserves |
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acid Alumina aluminum amount analyses auriferous average bauxite beds belt Bessemer black tin blast furnaces Britain brown hematite carbon cassiterite cent of iron cent of manganese clay coal Company containing copper deposits dikes district exports fault feet fissures following table France Geological Georgia gold grains granite hematite Hill imported inches iron and steel iron-ore Lake Superior lead limestone limonite lodes Long tons magnetic magnetite manganese manganiferous iron manufacture masses Metallic iron Metric tons miles mineral mines Mountain North Carolina obtained occur oolitic output oxide phosphorus piculs pig iron pisolitic portion pounds probably production of iron production of manganese production of pig Province pyrite quantity quartz red hematite region River rock sandstone saprolite schistose schists shale short tons silica silver slates smelting South Spain statistics stringers Sulphur surface thickness tion total production tungsten United Valley veins wash yield zinc
Popular passages
Page 604 - Nickel, nickel oxide, alloy of any kind in which nickel is the element of chief value, fifteen cents per pound. Zinc, spelter, or tiitenegue, in blocks or pigs, and old worn-out zinc, fit only tobe re m ami fact u red, one and one-half cent per pound; zinc, spelter, or tutenegue in sheets, two and one-half cents per pound.
Page 192 - ... follows: 1. Red hematite comprises those ores in which the iron occurs as an anhydrous oxide, giving a red streak on a porcelain plate, the color of the ore being generally a brownish red. or red, although sometimes a dark gray, almost black. This class includes "red hematite...
Page 538 - The process consists in providing a bath of fused fluorides to which alumina is added, and then reducing this alumina by the current from a dynamo. The bath is contained in carbon-lined iron pots or crucibles, which form the cathodes, while the anodes are large carbon cylinders which are made to dip into the baths. The specific gravity of aluminum being greater than that of the bath employed, the metal sinks to the bottom of the pots, and can be tapped off. To make alloys, the required metal (eg,...
Page 396 - The remainder is used in connection with iron and steel manufacture, chiefly in the production of steel and a pig iron containing considerable manganese for use in cast-iron car wheels. In the crucible process of steel manufacture manganese is charged into the pots, either as an ore at the time of charging the pots or it is added as spiegeleisen or ferromanganese at the time of charging or during the melting, usually toward the close of the melting, so as to prevent too great a loss of manganese,...
Page 442 - The second, and at present the only other producing district, is that known as the Carrizal, and sometimes as the Carrizal and Huasco from the ports of shipment. The manganese mines of this district were discovered in 1886, and at the end of that year a small lot was sent to the coast to be shipped. The lode had been often assayed before this, but as it was neither copper nor silver it was not considered of any value.
Page 192 - limonite," "turgite," "pipe" ore, "bog" ore, "goethite," "oolitic" ore, etc. (3) Magnetite comprises those ores in which iron occurs as a magnetic oxide, generally black or blueblack, or occasionally steel gray or greenish in color, and which when powdered give a black streak on a test plate, and are attracted by a magnet. In this class is included some "martite," -which is mined with magnetite.
Page 396 - ... as to prevent too great a loss of manganese by oxidation. In the bessemer and open-hearth process the manganese is added as spiegeleisen or ferro-manganese at' or near the close of the process, just before the casting of the metal into ingots. It has been found in recent years that a chilled cast-iron car wheel containing a percentage of manganese is much tougher, stronger and wears better than when manganese is absent. For this reason large amounts of manganiferous iron ores are used in the...
Page 457 - ... the next season, water, clay, mud, and boulders had to be cleared out before the manganese was touched. This system was continued up to 1892 with profitable results at first, owing to the high prices obtained for this ore ; but for the last few years, although yielding a profit that would be called excellent, if worked on a large scale, it was not considered sufficient to satisfy the then owner of the mines, and he had not the necessary capital to open them out in proper form. In view of this,...
Page 346 - The imports of fine copper contained in ores, and of regulus and black copper, and of ingot copper, old copper, plates not rolled, rolled plates, sheathing metal, and manufactures not otherwise specified, and of brass, are given in the following tables : COPPER. F...
Page 439 - Cape, near the line of their junction with the pre-Carboniferous rocks. In this range of measures the manganese of Teny cape appears to be principally connected with a compact red and gray limestone, which, from the analysis already given, may be called a dolomite.