Mineral Resources of the United States, Parte1U.S. Government Printing Office, 1912 |
Dentro del libro
Resultados 1-5 de 47
Página 21
... dredges . Of the deep mine product 94 per cent is from siliceous ores , the other 6 per cent being obtained from copper and lead ores . The production of copper comes chiefly from Shasta County ( over 80 per cent of the total ) with ...
... dredges . Of the deep mine product 94 per cent is from siliceous ores , the other 6 per cent being obtained from copper and lead ores . The production of copper comes chiefly from Shasta County ( over 80 per cent of the total ) with ...
Página 225
... dredges . The auriferous lode mines of southeastern Alaska produced $ 3,904,217 in gold in 1911 , against $ 3,839,626 in 1910 . The great Treadwell low - grade gold mines of the Juneau district con- tinued to be the heaviest producers ...
... dredges . The auriferous lode mines of southeastern Alaska produced $ 3,904,217 in gold in 1911 , against $ 3,839,626 in 1910 . The great Treadwell low - grade gold mines of the Juneau district con- tinued to be the heaviest producers ...
Página 226
... dredges produced 85.32 per cent of the total placer gold , and 38.84 per cent of the total gold from all sources in California in 1911 . Placer - gold production from all sources in California in 226 MINERAL RESOURCES .
... dredges produced 85.32 per cent of the total placer gold , and 38.84 per cent of the total gold from all sources in California in 1911 . Placer - gold production from all sources in California in 226 MINERAL RESOURCES .
Página 227
... dredges , $ 479,900 from 141 drift mines , and $ 164,680 from 210 surface or sluicing mines . The total gold output from California deep mines in 1911 , was $ 10 , - 752,381 , against $ 10,826,645 in 1910. Of this total $ 10,317,794 ...
... dredges , $ 479,900 from 141 drift mines , and $ 164,680 from 210 surface or sluicing mines . The total gold output from California deep mines in 1911 , was $ 10 , - 752,381 , against $ 10,826,645 in 1910. Of this total $ 10,317,794 ...
Página 228
... dredges and 9 placers , mainly in the Breckenridge district , yielded nearly 81 per cent of the placer output . The greater part of the remainder came from sluicing opera- tions in Park County and a dredge in Costilla County . Silver ...
... dredges and 9 placers , mainly in the Breckenridge district , yielded nearly 81 per cent of the placer output . The greater part of the remainder came from sluicing opera- tions in Park County and a dredge in Costilla County . Silver ...
Contenido
7 | |
91 | |
113 | |
119 | |
175 | |
181 | |
191 | |
209 | |
702 | |
721 | |
734 | |
740 | |
778 | |
788 | |
793 | |
873 | |
255 | |
315 | |
353 | |
399 | |
406 | |
420 | |
462 | |
505 | |
570 | |
602 | |
646 | |
889 | |
923 | |
941 | |
949 | |
955 | |
963 | |
973 | |
979 | |
987 | |
1005 | |
Otras ediciones - Ver todas
Términos y frases comunes
aggregated Amalgamation amounted Arizona average value base bullion bullion California carbonate centration clay products coal Colorado compared concen concentrating plant concentration mill containing copper-lead Creek crude Crusher cyanide plant decrease deep mines deposits depth district.-The dredges drilling dry or siliceous exports feet deep feet of drifts following table furnaces galena Geological gold and silver Grant County gravel Huntington mill Idaho important increase jigs Lake Superior lead and zinc lead concentrates lead-zinc lessees lode long tons magnetic manganese Mexico Michigan mineral production Missouri Montana Nevada Nye County old tailings operated ounces of gold ounces of silver oxidized pig iron placer mines pounds of copper pounds of lead principal production in 1911 production of gold pyrite recovered refined reported rock shipments shipped to smelters short tons silver mills smelters smelting Socorro County sphalerite sulphide Survey tion tonnage total value U. S. Geol United Utah vertical shaft yielded zinc concentrates
Pasajes populares
Página 213 - I refer you to the Annual Report of the Director of the Mint for the fiscal year ended June 30.
Página 340 - 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...
Página 339 - 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...
Página 383 - ... bonded 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...
Página 384 - ... 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 172 - Report on the geology and mineral resources of the central mineral region of Texas: Second Ann.
Página 353 - 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 397 - SCHRADER, FC, Mineral deposits of the Cerbat Range, Black Mountains, and Grand Wash Cliffs, Mohave County, Ariz.: Bull.
Página 396 - The following publications, except those to which a price is affixed, can be obtained free by applying to the Director...