First Century of National Existence: The United States as They Were and are ... Mineral Wealth ... Public Lands ... Internal Trade ... Immigration ... Banking ... Insurance ... Literature and Authors ...L. Stebbins, 1874 - 586 pages |
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Page 29
... pyrites are both often found in these Tennessee pots . " - Iron Manu- facturer's Guide , p . 603 . INDIANA , ILLINOIS , and IOWA contain no important bodies of iron ore . The coal measures , which cover large portions of these states ...
... pyrites are both often found in these Tennessee pots . " - Iron Manu- facturer's Guide , p . 603 . INDIANA , ILLINOIS , and IOWA contain no important bodies of iron ore . The coal measures , which cover large portions of these states ...
Page 49
... pyrites . then so highly valued that an offer of £ 500 , - In the twelve months preceding April 1 , 000 , made for it by an English company , was 1857 , 300 tons had been mined and sent to refused by the proprietor , Mr. Schuyler . In ...
... pyrites . then so highly valued that an offer of £ 500 , - In the twelve months preceding April 1 , 000 , made for it by an English company , was 1857 , 300 tons had been mined and sent to refused by the proprietor , Mr. Schuyler . In ...
Page 70
... pyrites and some galena . Nearly all the gold was obtained within 70 feet of the surface . Mining Company , for the purpose of apply- ing the same system to the high grounds in White county , recently a part of Haber- sham , in which ...
... pyrites and some galena . Nearly all the gold was obtained within 70 feet of the surface . Mining Company , for the purpose of apply- ing the same system to the high grounds in White county , recently a part of Haber- sham , in which ...
Page 71
... pyrites . This renders its extraction more difficult ; but processes have lately been de- vised which , without increasing materially the expense , will raise the production of gold per cord of ore to three or five - fold what it has ...
... pyrites . This renders its extraction more difficult ; but processes have lately been de- vised which , without increasing materially the expense , will raise the production of gold per cord of ore to three or five - fold what it has ...
Page 74
... pyrites it is held very tenaciously , as if combined itself with the sulphur , like the other metals . However finely such ores are pulverized , every micro- scopic particle of pyrites appears to retain a portion of gold , and prevent ...
... pyrites it is held very tenaciously , as if combined itself with the sulphur , like the other metals . However finely such ores are pulverized , every micro- scopic particle of pyrites appears to retain a portion of gold , and prevent ...
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