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Oliver Evans papers on patents, manufacturing and business matters, 1793-1818, 1900

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Wynn Laurence LePage papers, 1857-1869, 1929-1974

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Henry R. Heyl papers, 1876-1917 (inclusive)

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Oliver Wolcott Gibbs papers, 1847-1910 (inclusive)

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William N. Jennings scrapbook, photographs, and negatives, 1882-1937 (inclusive)

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Henry Butler Allen papers, 1933-1959 (bulk) 1924-1959 (inclusive)

Held at: The Historical and Interpretive Collections of The Franklin Institute [Contact Us]

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Frederick Graff maps, technical drawings, and plans on Philadelphia (Pa.) water engineering projects, circa 1683-1875

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Sellers family papers on machinery, 1845-1893 (inclusive)

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Orville and Wilbur Wright papers on aeronautical engineering, 1889-1930 (inclusive)

Held at: The Historical and Interpretive Collections of The Franklin Institute [Contact Us]