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w:Edward Wright (mathematician) - Public Domain
unknown - Public Domain
NoraAaron - CC BY-SA 3.0
photographer-Kerr, New York - Public Domain
Wierzba -
Contemporary portrait - Public Domain
Lincoln Ellsworth - Public Domain
Unknown photographer -
Muesse - CC BY 3.0
J. R. Diamond - Public Domain
w - CC BY 3.0
Louise Blangini (lithographer) - Public Domain
Jean-Louis Laneuville - Public Domain
anonymous - Public Domain
Seneca Ray Stoddard - Public Domain
Public Domain
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w:Edward Wright (mathematician) - Public Domain
Wright, Edward, 1558?-1615
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unknown - Public Domain
McCabe, Joseph, 1867-1955
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NoraAaron - CC BY-SA 3.0
Brookner, Jackie
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photographer-Kerr, New York - Public Domain
Gardner, Rita
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Wierzba -
Wershba, Joseph
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unknown - Public Domain
Togan, Ahmed Zeki Velidi, 1890-1970
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Wise, Thomas James, 1859-1937
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Walker, Joseph Reddeford, 1798-1876
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Hayler, Franz
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Bernard, S.-F. (Simon-François), 1817-1862
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Smith, William H. (William Hugh), 1826-1899
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Contemporary portrait - Public Domain
Duppa, Brian, 1588-1662
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Collins, Michael, 1890-1922
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Lincoln Ellsworth - Public Domain
Polar Star (Airplane)
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Unknown photographer -
Thomas, A. E. (Albert Ellsworth), 1872-1947
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Seckendorff, Friedrich Heinrich von, Reichsgraf, 1673-1763
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Muesse - CC BY 3.0
Spranger, Eduard, 1882-1963
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Duff, Andrew
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Fée, Antoine Laurent Apollinaire, 1789-1874
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J. R. Diamond - Public Domain
Ballin, Hugo, 1879-1956
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w - CC BY 3.0
Vani Jairam
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Louise Blangini (lithographer) - Public Domain
Blangini
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Jean-Louis Laneuville - Public Domain
Debry, Jean-Antoine-Joseph, 1760-1834
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unknown - Public Domain
Keppel, Frederick P. (Frederick Paul), 1875-1943
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Shepard, Edward Morse, 1850-1911
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anonymous - Public Domain
Eustis, William Henry, 1845-1925
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Kwitney, Alisa, 1964-
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Seneca Ray Stoddard - Public Domain
Durant, William West, 1850-1934
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Diesendorf, Margaret 1912-
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Public Domain
Whiting, William, 1813-1873