Image from Wikimedia Commons
Holmes - CC BY-SA 4.0
Unidentified -
J. B. Forrest, engraver, New York City, circa 1842 - Public Domain
Hedvig Bjerknes - CC BY-SA 4.0
unknown - Public Domain
Internet Archive Book Images -
InstituteatGG - CC BY-SA 4.0
Public Domain
Cassidy Turner - CC BY-SA 3.0
Toepoet - CC BY 3.0
…trialsanderrors - Public Domain
Jacobs, Konrad -
Шведе, Роберт Густавович -
Sherwin Carlquist - CC BY-SA 3.0
Image from Wikimedia Commons
Holmes - CC BY-SA 4.0
Faulkner, Thomas, 1777-1855
Image from Wikimedia Commons
Unidentified -
Hawken, R. W. H. (Roger William Hercules), 1878-1947
Image from Wikimedia Commons
Pope, Jack, 1913-
Image from Wikimedia Commons
Fesch, Willem de 1687-1761
Image from Wikimedia Commons
J. B. Forrest, engraver, New York City, circa 1842 - Public Domain
Davezac, A. (Auguste), 1780-1851
Image from Wikimedia Commons
Hedvig Bjerknes - CC BY-SA 4.0
Bjerknes, Jakob, 1897-....
Image from Wikimedia Commons
unknown - Public Domain
Abbott, Lawrence F. (Lawrence Fraser), 1859-1933
Image from Wikimedia Commons
Internet Archive Book Images -
Emerson, Isaac E. (Isaac Edward), 1859-1931
Image from Wikimedia Commons
Webster, W. F. (William Franklin), 1862-1936
Image from Wikimedia Commons
unknown - Public Domain
Andreä, Johann Valentin, 1586-1654
Image from Wikimedia Commons
Galiani, Ferdinando, 1728-1787
Image from Wikimedia Commons
unknown - Public Domain
Schwechten, Franz Heinrich, 1841-1924
Image from Wikimedia Commons
O'Reilly, Bill, 1905-
Image from Wikimedia Commons
Fisher, Clara, 1811-1898
Image from Wikimedia Commons
Fabroni, A. (Angelo), 1732-1803
Image from Wikimedia Commons
InstituteatGG - CC BY-SA 4.0
Spence, Christopher, 1970-
Image from Wikimedia Commons
Albert de Luynes, Charles d', 1578-1621
Image from Wikimedia Commons
Papus, 1865-1916
Image from Wikimedia Commons
Oguri, Kōhei, 1945-....
Image from Wikimedia Commons
Leonhard, Wolfgang
Image from Wikimedia Commons
Public Domain
Huggins, Charles, 1901-1997
Image from Wikimedia Commons
Cassidy Turner - CC BY-SA 3.0
Hannah, Daryl
Image from Wikimedia Commons
Ferrer Guardia, Francisco, 1859-1909
Image from Wikimedia Commons
Toepoet - CC BY 3.0
Tucker, Beverley Dandridge, 1846-1930
Image from Wikimedia Commons
…trialsanderrors - Public Domain
Fealy, Maude, 1881-1971
Image from Wikimedia Commons
Jacobs, Konrad -
Schoenberg, I. J.
Image from Wikimedia Commons
Lambert, Aylmer Bourke, 1761-1842
Image from Wikimedia Commons
Шведе, Роберт Густавович -
Lazarev, Mikhail Petrovich, 1788-1851
Image from Wikimedia Commons
unknown - Public Domain
Giordani, Pietro, 1774-1848
Image from Wikimedia Commons
Sherwin Carlquist - CC BY-SA 3.0
Carlquist, Sherwin John, 1930-....