James Martineau
1923 · Fine
€40
Abraham Kuyper
1911 · Fine · NL
€30
Carl David Tolmé Runge
1916 · Fine
€50
John Dewey
1910 · Fine
€30
Rudolf Otto
1929 · Fine
€35
Walter E. Thirring
1906 · Fine
€40
Henry Sinclair Hall, Samuel R. Knight
1904 · Fine
€30
Ika A. Thomése
1935 · Fine · NL
€35
Thompson, D'Arcy Wentworth
1931 · Fine
€35
Ernst Heinrich Philipp August Haeckel
1900 · Fine
€30
Mādhavakara.
1924 · Fine
€30
Morris Raphael Cohen
1935 · Fine
€35
Alfred North Whitehead
1930 · Fine
€40
Nicolass Muller
1915 · Fine · NL
€35
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
H. Newell Martin
1903 · Fine
€40
H. G. Wells
1919 · Fine
€35
Pieter Joseph Cruse
1911 · Fine · NL
€30
Antoni Christiaan Winand Staring
1900 · Fine · NL
€30
F. Matthias Alexander
1935 · Fine
€35
J. Arthur Thomson
1909 · Fine
€45
L. A. Waterbury
1913 · Fine
€45
Carlton C. Curtis
1907 · Fine
€50
Erwin Madelung
1935 · Fine
€40
John Willis Clark
1918 · Fine
€50
Hilaire Belloc
1929 · Fine
€35
George M. Gould
1900 · Fine
€35
Eduard Strasburger
1935 · Fine
€45
C. Snouck Hurgronje
1935 · Fine · NL
€30
Frederic William Farrar
1905 · Fine
€35
George Bernard Shaw
1927 · Fine
€30
Eduard Strasburger
1924 · Fine
€40
Peter Kropotkin
1910 · Fine
€50
Theodore Shennan
1912 · Fine
€45
Charles David Hodgman
1916 · Fine
€45
Jan van Leeuwen
1935 · Fine · NL
€45
George Washington Carey, Inez E. Perry
1914 · Fine
€30
Steven S. Zumdahl
1915 · Fine
€45
Mortimer Menpes, Dorothy Menpes
1901 · Fine
€40
Alexis Thomson
1912 · Fine
€30
Alfred Russel Wallace
1935 · Fine
€35
Lewis Beesly, Thomas Baillie Johnston
1928 · Fine
€50
Henry Gray F.R.S., Henry Vandyke Carter
1915 · Fine
€50
Maximilien Marie
1925 · Fine
€35
Jan Frederik Beerens
1910 · Fine · NL
€50
Wood, Robert Williams
1919 · Fine
€40
W. L. van Helten
1935 · Fine · NL
€35
Jesse Feiring Williams
1924 · Fine
€35
Henri Poincaré
1910 · Fine
€30
Willem Jan Maria Westerwoudt
1915 · Fine · NL
€40
Inge, William Ralph
1926 · Fine
€50
Ernest Thompson Seton
1929 · Fine
€35
Peter Lund Simmonds, Simmonds P. L. (Peter Lund)
1923 · Fine
€50
Smithsonian Institution
1935 · Fine
€45
Romain Rolland
1918 · Fine
€50
H. Newell Martin, Ernest Gale Martin
1904 · Fine
€40
Mary Shelley
1935 · Fine
€40
Austin M. Patterson
1935 · Fine
€35
Klaas Johan Pen
1935 · Fine · NL
€35
George Sydenham Clarke
1910 · Fine
€30