Mineral Resources of the United States, Parte1U.S. Government Printing Office, 1911 |
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Página 226
... feet and a station cut out at the 1,800 - foot level . From the shaft station on the 1,450 - foot level , which is at that point 181 feet in the foot - wall country rock of the lode , the main crosscut has been driven to the hanging ...
... feet and a station cut out at the 1,800 - foot level . From the shaft station on the 1,450 - foot level , which is at that point 181 feet in the foot - wall country rock of the lode , the main crosscut has been driven to the hanging ...
Página 227
... feet deeper , giving it a depth of approximately 1,450 feet , and ore was partly developed on the 1,210 - foot level . The ore sent to the mill during the year was derived principally from the 990 - foot level . The Ready Bullion shaft ...
... feet deeper , giving it a depth of approximately 1,450 feet , and ore was partly developed on the 1,210 - foot level . The ore sent to the mill during the year was derived principally from the 990 - foot level . The Ready Bullion shaft ...
Página 228
... feet of tram ( in part gravity and in part horse tram ) , and bunk houses were constructed and the shipment of ore was begun . The ore was derived partly from an open cut on the apex of the deposit and partly from a large chamber stoped ...
... feet of tram ( in part gravity and in part horse tram ) , and bunk houses were constructed and the shipment of ore was begun . The ore was derived partly from an open cut on the apex of the deposit and partly from a large chamber stoped ...
Página 229
... feet an ore body about 30 feet in thickness is said to have been penetrated . At Landlocked Bay considerable development work was under- taken , and an ore bunker was constructed at the beach . Near Cor- dova and Orca prospecting was ...
... feet an ore body about 30 feet in thickness is said to have been penetrated . At Landlocked Bay considerable development work was under- taken , and an ore bunker was constructed at the beach . Near Cor- dova and Orca prospecting was ...
Página 230
... feet or more thick . The schists of this belt are much jointed and locally faulted , and the veins occur along joint planes and local fault planes and have themselves been in places much broken and faulted . The rich ore that has thus ...
... feet or more thick . The schists of this belt are much jointed and locally faulted , and the veins occur along joint planes and local fault planes and have themselves been in places much broken and faulted . The rich ore that has thus ...
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Términos y frases comunes
aggregated amounted antimony Arizona associated metals average value base bullion bauxite California cents per pound Colorado compared concentration mill consumption containing Copper Company copper-lead County in 1909 Creek cyanide decrease deep mines deposits district in 1909 district.-The dredges exports feet fine ounces fluorspar Geological Survey gold and silver gold production Idaho imports increase Lake Superior lead and zinc lessees long tons manganese miles Mineral mines produced Mining Company Montana Nevada Nye County operated ounces of gold ounces of silver oxide pig iron placer gold placer mines plant pounds of copper pounds of lead produced in 1909 producing mines production of gold pyrite Quan Quantity quartz quicksilver recovered refined reported rock sand-lime brick shaft shipments shipped to smelters short tons siliceous silver mills silver production smelters smelting Socorro County sold or treated sphalerite spiegeleisen tity tonnage tons of concentrates total value U. S. Geol Utah yield
Pasajes populares
Página 195 - Provided, That on all importations of lead-bearing 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 195 - ... warehouses or otherwise. On the arrival of the ores at such establishments they shall be sampled according to commercial 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...
Página 122 - DISTRIBUTION, BY PRODUCING STATES AND TERRITORIES, OF THE PRODUCT OF GOLD AND SILVER IN THE UNITED STATES FOR THE CALENDAR YEAR, 1905.
Página 215 - Minerals, crude, or not advanced in value or condition by refining or grinding, or by other process of manufacture, not specially provided for in this Act.
Página 196 - Provided further, That all labor performed and services rendered pursuant to this section shall be under the supervision of an officer of the customs, to be appointed by the Secretary of the Treasury, and at the expense of the manufacturer...
Página 566 - That when wheels for railway purposes, or parts thereof, of iron or steel, are imported with iron or steel axles fitted in them, the wheels and axles together shall be dutiable at the same rate as is provided for the wheels when imported separately. 172. Aluminum, aluminum scrap, and alloys of any kind in which, aluminum is the component material of chief value...
Página 500 - The completion of the White River branch of the St. Louis, Iron Mountain and Southern Railroad and of the St.
Página 203 - Statistics of the recovery of secondary zinc were collected from all the important secondary smelters and refiners. The statistics of domestic consumption are taken in part from the smelter returns and in part from the records of the Bureau of Statistics of the Department of Commerce and Labor, and the tables for foreign production and consumption were compiled from the sources indicated. i In Mineral Resources for 1906, p. 461, zinc derived from ore was called "primary" spelter to distinguish it...
Página 42 - Mr. James M. Swank, general manager of the American Iron and Steel Association, corroborates the testimony of Mr.
Página 196 - ... metals of home or foreign production: Provided, That the bonds shall be charged with...