- Scientific American. -- Supplement

New York: Scientific American, 1870. Broadside. 1p. Folio (16½" X 23"). Very good. Some original mailing folds archivally strengthened on verso, but recto is clean and handsome, with very few edge tears. Titled "Scientific American. -- Supplement" in a large and splashy typeface, this large broadside advertising this mainstay publication features a large steel engraving of "Railroad Bridge Over the Susquehanna at Havre de Grace" occupying nearly the entire top half. The lower half, divided into three columns, includes a full 1870 calendar, lengthy subscription information for Scientific American, and some boilerplate advertisements. Picturesque and ideal for display. .

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