Gold and Silver: Comprising an Economic History of Mining in the United States, the Geographical and Geological Occurrence of the Precious Metals, with Their Mineralogical Associations, History and Description of Methods of Mining and Extraction of Values, and a Detailed Discussion of the Production of Gold and Silver in the World and the United StatesJ. Wiley & Sons, 1908 - 727 strani |
Iz vsebine knjige
Zadetki 1–5 od 100
Stran 33
... Mill and the signing of the treaty . It is claimed that the knowledge of the discovery was not known to the Mexicans , while the Amer- ican officials affected ignorance . The following extract from an unofficial letter written on March ...
... Mill and the signing of the treaty . It is claimed that the knowledge of the discovery was not known to the Mexicans , while the Amer- ican officials affected ignorance . The following extract from an unofficial letter written on March ...
Stran 50
... mills erected in the vicinity of Prescott were either upon worthless lodes or upon those in which ores predominate which ... mill is in process of erection at Apache Pass , where the gold lodes are attracting much attention and give ...
... mills erected in the vicinity of Prescott were either upon worthless lodes or upon those in which ores predominate which ... mill is in process of erection at Apache Pass , where the gold lodes are attracting much attention and give ...
Stran 51
... mill of the Silver King mine and seemed to be very much interested in what he saw . Later , he told that he was Sullivan , the original discoverer of the mine . The story he told showed that it was not lack of faith , but lack of funds ...
... mill of the Silver King mine and seemed to be very much interested in what he saw . Later , he told that he was Sullivan , the original discoverer of the mine . The story he told showed that it was not lack of faith , but lack of funds ...
Stran 55
... mill was not sufficiently deep he had hit upon the plan of cutting the excavation deeper by the action of running water , accomplished in this case by turning on a full head of water from the mill - pond by simply raising the gate ...
... mill was not sufficiently deep he had hit upon the plan of cutting the excavation deeper by the action of running water , accomplished in this case by turning on a full head of water from the mill - pond by simply raising the gate ...
Stran 56
... mill at the time of the discovery , left for San Francisco about the middle of February , taking with him some of the gold . There he met Isaac Humphrey , who had worked in the Georgia gold mines ; he at once pronounced it gold and ...
... mill at the time of the discovery , left for San Francisco about the middle of February , taking with him some of the gold . There he met Isaac Humphrey , who had worked in the Georgia gold mines ; he at once pronounced it gold and ...
Druge izdaje - Prikaži vse
Pogosti izrazi in povedi
Alaska amalgamation andesite argentiferous assay auriferous average bed-rock blende calcite California Carolina cent chalcopyrite chlorination Colorado Comstock lode considerable copper country-rock County Cripple Creek cyanide cyanide process Deep Mines deposits depth diorite discovered discovery district dollars drift employed extraction feet free-gold furnace galena gangue gold and silver gold production gold-bearing granite gravel gray copper Gulch Hill hydraulic Ibid Idaho igneous rocks inches iron Jour lead limestone located mercury method Mexico mill Mineral Industry Mineral Resources Mines and Minerals Montana Mountain Nevada North North Carolina occur operations ore-bodies ounces output oxide placer mines placers porphyry precious metals Press probably production of gold pyrite quantities quartz quartz-veins Rept River roasting rocks schists shaft silver production Silver-bearing slate sluices smelting solution South stamps stope sulphides sulphurets surface TABLE tellurides tellurium tetrahedrite timber tion tons Total tunnel usually Utah veins width yield zinc