McCulloh, R. S. (Richard Sears), 1818-1894. Memorial to the Congress of the United States : requesting an investigation and legislation in relation to the new method for refining gold / of Prof. R.S. McCulloh.

McCulloh, R. S. (Richard Sears), 1818-1894.

Memorial to the Congress of the United States : requesting an investigation and legislation in relation to the new method for refining gold / of Prof. R.S. McCulloh.

Princeton, N.J. : J.T. Robinson, Printer, 1851.

Gold -- Metallurgy.

United States. Bureau of the Mint.

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