Hardening Iron and Steel. New PIode of Printing and Embossing Cloth. Baldwin's Automatic Lathe. Magnetic Figures with Iron Filings., scientific american, 1868-05-16

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Hardening Iron and Steel. New PIode of Printing and Embossing Cloth. Baldwin's Automatic Lathe. Magnetic Figures with Iron Filings., scientific american, 1868-05-16

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