Mineral Resources of the United StatesU.S. Government Printing Office, 1912 |
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Página 248
... copper or lead bullion . COPPER ORES . The production of silver from copper ores was 16,759,638 fine ounces in 1911 , against 16,024,543 ounces in 1910 , corresponding to an increased copper output in 1911. The silver production from ...
... copper or lead bullion . COPPER ORES . The production of silver from copper ores was 16,759,638 fine ounces in 1911 , against 16,024,543 ounces in 1910 , corresponding to an increased copper output in 1911. The silver production from ...
Página 255
COPPER . By B. S. BUTLER . INTRODUCTION . In the production of metallic copper suitable for commercial purposes three distinct processes are usually required , namely , mining , smelting , and refining . The Lake Superior native copper ...
COPPER . By B. S. BUTLER . INTRODUCTION . In the production of metallic copper suitable for commercial purposes three distinct processes are usually required , namely , mining , smelting , and refining . The Lake Superior native copper ...
Página 256
... copper and of furnace - refined or ingot copper of the Lake district . SUMMARY OF STATISTICS . The following statistical statement summarizes the copper industry in the United States in 1910 and 1911 : Summary of statistics of the ...
... copper and of furnace - refined or ingot copper of the Lake district . SUMMARY OF STATISTICS . The following statistical statement summarizes the copper industry in the United States in 1910 and 1911 : Summary of statistics of the ...
Página 257
... copper metal market . The average price of copper for the year , 12.5 cents a pound , was slightly below that of 1910 and the lowest yearly average price since 1902. Near the close of the year , however , the price of copper was notably ...
... copper metal market . The average price of copper for the year , 12.5 cents a pound , was slightly below that of 1910 and the lowest yearly average price since 1902. Near the close of the year , however , the price of copper was notably ...
Página 264
... copper in various stages of manufacture , which it was found necessary to reduce by curtailing the current production . During 1911 domestic consumption and exports of copper ex- ceeded production , so that at the close of the year ...
... copper in various stages of manufacture , which it was found necessary to reduce by curtailing the current production . During 1911 domestic consumption and exports of copper ex- ceeded production , so that at the close of the year ...
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Términos y frases comunes
1911 were valued Alaska amalgamation Arizona average barrels base bullion Bull California cents per pound chalcocite clay products coal coke Colorado concentrates copper County cyanidation decrease deep mines deposits Derived product includes developed district domestic dredges drilling estimated exports feet figures furnaces gold and silver hematite Idaho imports for consumption included under Miscellaneous increased industry iron-ore Lake Superior lead limestone long tons magnetic magnetite manganese manganiferous manufacture metal Mexico Michigan mill mineral production mineral waters Minnesota Missouri Montana Nevada operations ounces in 1910 ounces of silver oxide Pennsylvania pig iron placer mines placers plant pounds of copper principal production in 1911 production of gold pyrite Quantity ranks refined reported rock Sand and gravel Sand-lime brick shipment short tons siliceous smelter smelting spiegeleisen stone sulphide Tennessee tion tonnage total output total production total value U. S. Geol Utah Value included Virginia yielded zinc content zinc oxide
Pasajes populares
Página 333 - Provided, That on all importations of lead-benring ores the duties shall be estimated at the port of entry, and a bond given In double the amount of such estimated duties for the transportation of the ores by common carriers bonded for the transportation of appraised or unappraised merchandise to properly equipped sampling or smelting establishments, whether designated as bonded warehouses or otherwise.
Página 211 - WORLD'S PRODUCTION OF GOLD. The production of gold in the world since 1860 is shown in the following table from the report of the Director of the Mint for the fiscal year ended June 30, 1911.
Página 783 - Sphalerite, or zinc blende, is the next important metallic mineral, but it occurs much less plentifully than galena. It is recovered as zinc middlings in the concentration of the fluorspar. The difficulty of making a clean separation of the zinc middlings has kept down the production of zinc. None has been sold from southern Illinois in the last four years.
Página 376 - ... methods under the supervision of government officers, who shall be stationed at such establishments, and who shall submit the samples thus obtained to a government assayer, designated by the Secretary of the Treasury, who shall make a proper assay of the sample and report the result to the proper customs officers, and the import entries shall be liquidated thereon, except in case of ores that shall be removed to a bonded warehouse to be refined for exportation as provided by law. And the Secretary...
Página 376 - PAR. 194. Zinc in blocks or pigs and zinc dust, one and three-eighths cents per pound; in sheets, one and five-eighths cents per pound; in sheets coated or plated with nickel or other metal or solutions, one and three-fourths cents per pound: old and worn-out, fit only to be remanufactured, one cent per pound.
Página 171 - VAN HISE, CR, and LEITH, CK, The geology of the Lake Superior region: Mon., vol.
Página 347 - States as shown by the report of the Bureau of Statistics of the Department of Commerce and Labor...
Página 148 - The next two pages, the southeast quarter of the northeast quarter and the southwest quarter of the northeast quarter, and so on through the other quarters of the section.
Página 784 - ... ores is so small that it is disregarded in the assay and sale of the concentrates. For this reason the smelter reports must be relied upon for the silver production. As may be seen by inspection of the table, the quantity of silver produced in any year bears no direct ratio to the quantity of concentrates smelted during that year.
Página 335 - It is not be be denied that for the individual year this gives closer figures. It is just as true that account of trade stocks should also be taken to arrive at accurate results; but this is manifestly outside the scope of this bureau. It has been found impossible to obtain a statement of stocks from one large producer since 1906 ; hence consumption has been calculated without reference to domestic stocks. A very considerable part, however, amounting to between one-fourth and one-fifth of the lead...