Image from Wikimedia Commons
Sara McGaughey Rand, author. - Public Domain
The National Academy of Sciences - Public Domain
Unknown author - Public Domain
Machahn - Public Domain
Gage Skidmore - CC BY-SA 3.0
Jeff Hardcastle - CC BY 2.0
unknown photographer - Public Domain
Werk: Werner F. Kunz (Freigabe durch Erben) Fotografie: H87 -
unknown - Public Domain
Lent - CC BY-SA 4.0
User at project link - Public Domain
nach einem Gemälde von E. Hader, 1885 herausgegeben von Sophus Williams Verlag Berlin. - Public Domain
Engraved by J. K. Campbell, Sr. for Munsell & Co. of New York - Public Domain
Image from Wikimedia Commons
Marañón, Gregório, 1887-1960
Image from Wikimedia Commons
Sara McGaughey Rand, author. - Public Domain
McGaughey, Edward W.
Image from Wikimedia Commons
Berzelius, Jöns Jakob, friherre, 1779-1848
Image from Wikimedia Commons
The National Academy of Sciences - Public Domain
Adkins, Homer, 1892-1949
Image from Wikimedia Commons
Unknown author - Public Domain
Costa, Alexandrina Maria da 1904-1955
Image from Wikimedia Commons
Herring, Thomas, 1693-1757
Image from Wikimedia Commons
Machahn - Public Domain
Montgelas, Maximilian Joseph, Graf von, 1759-1838
Image from Wikimedia Commons
Gage Skidmore - CC BY-SA 3.0
Mansfield, Harvey Claflin, 1932-....
Image from Wikimedia Commons
Jeff Hardcastle - CC BY 2.0
Barnes, Alan, 1940-
Image from Wikimedia Commons
unknown photographer - Public Domain
Nescio, 1882-1961
Image from Wikimedia Commons
Treitschke, Georg Friedrich, 1776-1842
Image from Wikimedia Commons
Werk: Werner F. Kunz (Freigabe durch Erben) Fotografie: H87 -
Brunner, Emil, 1889-1966
Image from Wikimedia Commons
Bowers, Claude Gernade, 1879-1958
Image from Wikimedia Commons
Johnson, Eastman, 1824-1906
Image from Wikimedia Commons
Haydon, Benjamin Robert, 1786-1846
Image from Wikimedia Commons
unknown - Public Domain
Hecker, Friedrich, 1811-1881
Image from Wikimedia Commons
Eaton, Daniel Cady, 1834-1895
Image from Wikimedia Commons
Robbins, Asher, 1761-1845
Image from Wikimedia Commons
McLeod, Kembrew, 1970-....
Image from Wikimedia Commons
Matos, Norton de
Image from Wikimedia Commons
Lent - CC BY-SA 4.0
Dunn, Gano, 1870-1953
Image from Wikimedia Commons
User at project link - Public Domain
Liviabella, Lino, 1902-1964
Image from Wikimedia Commons
nach einem Gemälde von E. Hader, 1885 herausgegeben von Sophus Williams Verlag Berlin. - Public Domain
Benedix, Roderich, 1811-1873
Image from Wikimedia Commons
Steiner, George, 1929-....
Image from Wikimedia Commons
Weisskopf, Victor Frederick, 1908-2002
Image from Wikimedia Commons
Kirsch, Sarah
Image from Wikimedia Commons
Engraved by J. K. Campbell, Sr. for Munsell & Co. of New York - Public Domain
Lanman, Charles, 1819-1895
Image from Wikimedia Commons
Sprague, Frank J. (Frank Julian), 1857-1934
Image from Wikimedia Commons
Kaukonen, Jorma
Image from Wikimedia Commons
Ciechanowiecki, Andrzej, 1924-2015