Entered at the Post Office of New York as Second Class Matter. Copyrighted 1890 by Munn & Co.) [ $ A YEAR. WEEKLY., scientific american, 1890-01-18

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Entered at the Post Office of New York as Second Class Matter. Copyrighted 1890 by Munn & Co.) [ $ A YEAR. WEEKLY., scientific american, 1890-01-18

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