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  1. 1
    Philadelphia, Feb. [blank], 1795 Sir, Having from early age been concerned in working mines, and smelting and refining ores in Europe, and also several years engaged in the same line in the United States, I wish to become useful in promoting the opening of mines in this country

    Philadelphia, Feb. [blank], 1795 Sir, Having from early age been concerned in working mines, and smelting and refining ores in Europe, and also several years engaged in the same li... by Henfrey, Benjamin

    Published 1795
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  2. 2
    A plan with proposals for forming a company to work mines in the United States and to smelt and refine the ores whether of copper, lead, tin, silver, or gold

    A plan with proposals for forming a company to work mines in the United States and to smelt and refine the ores whether of copper, lead, tin, silver, or gold by Henfrey, Benjamin

    Published 1797
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  3. 3
    A plan with proposals for forming a company to work mines in the United States and to smelt and refine the ores whether of copper, lead, tin, silver, or gold

    A plan with proposals for forming a company to work mines in the United States and to smelt and refine the ores whether of copper, lead, tin, silver, or gold by Henfrey, Benjamin

    Published 1797
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