Image from Wikimedia Commons
Photouploader - Public Domain
unknown - Public Domain
John C. H. Grabill - Public Domain
unknown photographer - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Contemporary portrait - Public Domain
The American Monthly Review of Reviews - Public Domain
part of Brady-Handy Photograph Collection (Library of Congress). - Public Domain
Bain News Service, publisher - Public Domain
Llanta. - Public Domain
Not stated - Public Domain
Carl Schorlemmer and Arthur Smithells - Public Domain
Unknown - Public Domain
Public Domain
Image from Wikimedia Commons
Gevaert, F.A. (François Auguste), 1828-1908
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Manasseh ben Israel, 1604-1657
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Photouploader - Public Domain
Wegener, Paul, 1874-1948
Image from Wikimedia Commons
unknown - Public Domain
Rodbell, Martin, 1925-1998
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Pearson, Oliver P. (Oliver Payne)
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Kiner, Ralph
Image from Wikimedia Commons
John C. H. Grabill - Public Domain
Watson, Elmo Scott, 1892-1951
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unknown - Public Domain
Harcourt, Edward, 1757-1847
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unknown photographer - Public Domain
Bushman, Francis X., 1903-1978
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Ferry, Orris S. (Orris Sanford), 1823-1875
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Russell, John H. (John Henry), 1872-1947
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Contemporary portrait - Public Domain
Collins, Anthony, 1676-1729
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Santos, José Eduardo dos, 1942-
Image from Wikimedia Commons
The American Monthly Review of Reviews - Public Domain
Abbot, Willis J. (Willis John), 1863-1934
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part of Brady-Handy Photograph Collection (Library of Congress). - Public Domain
Fenn, S. S. (Stephen Southmyd), 1820-1892
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Malte-Brun, Conrad, 1775-1826
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Bain News Service, publisher - Public Domain
Clews, Henry, 1836-1923
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Foscolo, Ugo, 1778-1827
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Cooper, Duff, Viscount Norwich, 1890-1954
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Warren, John Borlase, Sir, 1753-1822
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Selous, Henry Courtney, 1803-1890
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Llanta. - Public Domain
Hommaire de Hell, Xavier, 1812-1848
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Leontief, Wassily, 1906-1999
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Foley, John Henry, 1818-1874
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Not stated - Public Domain
Pease, Lute, 1869-1963
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Carl Schorlemmer and Arthur Smithells - Public Domain
Schorlemmer, Carl, 1834-1892
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Unknown - Public Domain
Pereira, Jacob Rodrigues, 1715-1780
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unknown - Public Domain
Goold-Adams, Hamilton John, Sir, 1858-1920
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Public Domain
Brooks, Noah, 1830-1903
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Turner, Charles Yardley, 1850-1918.