Herbert Spencer
1882 · Very good
€105
Charles Riborg Mann
1916 · Very good
€35
Friedrich Fröbel
1919 · Good
€20
Maatschappij der Nederlandse Letterkunde te Leiden
1811 · Fine · NL
€180
Menno Simons
1795 · Very good · NL
€405
George Fownes
1848 · Very good
€200
Steven S. Zumdahl
1915 · Good
€45
Almira (Hart) Lincoln Phelps
1869 · Good
€150
Hugo Leonard von Gutzeit
1887 · Very good · NL
€85
James Clerk Maxwell
1881 · Good
€125
Jöns Jacob Berzelius
1834 · Good
€90
Hendrik Blink
1925 · Fair · NL
€20
Martin Klopstock
1911 · Good
€35
Roger Eliot Fry
1921 · Fair
€55
Joseph Priestley
1796 · Fine
€300
Richard Thayer Holbrook
1919 · Very good
€70
Universiteit Leiden
1817 · Good · NL
€90
Marcet Mrs
1815 · Good
€235
John Wesley
1796 · Very good
€575
Moritz Schlick
1928 · Good
€55
John Joseph Griffin
1832 · Good
€225
Joseph Louis Lagrange, Thomas J. McCormack
1898 · Good
€40
William Thoms
1862 · Good
€115
Ron Larson
1906 · Good
€45
John L. Stoddard
1900 · Very good
€25
Johannes Petrus Hasebroek
1898 · Very good · NL
€80
Hannah Glasse
1765 · Very good
€245
William Kingdon Clifford
1914 · Fair
€35
Henri Bergson, Nancy Margaret Paul
1902 · Good
€45
Lankester, E. Ray Sir
1922 · Good
€30
Carlton C. Curtis
1907 · Fine
€50
Willem Christiaan Knottenbelt
1873 · Good · NL
€65
Florian Cajori
1929 · Good
€65
Jules Bernard Luys
1909 · Good
€25
Asa Gray
1881 · Good
€65
Peter Kropotkin
1903 · Fair
€15
Philippus Pieter Roorda van Eysinga
1852 · Fair · NL
€80
Jonathan Dymond
1879 · Good
€55
John Dewey
1920 · Very good
€40
L. E. J. Brouwer
1909 · Good · NL
€60
Samuel Pierpont Langley
1889 · Good
€45
Edward Livingston Youmans
1896 · Good
€50
Eduard Strasburger
1899 · Very good
€80
John Tyndall
1881 · Good
€55
Jonathan Pereira
1880 · Good · NL
€110
Balfour Stewart
1919 · Good
€20
Sanborn Tenney
1881 · Very good
€70
Denison Olmsted
1857 · Fair
€40
John Timbs
1871 · Very good
€70
Josiah Parsons Cooke Jr.
1882 · Very good
€120
Ika A. Thomése
1935 · Fine · NL
€35
Augustus De Morgan
1903 · Very good
€60
Priscilla Wakefield
1825 · Good
€140
René Descartes
1912 · Very good
€85
Denison Olmsted
1868 · Good
€60
Steven S. Zumdahl
1915 · Fine
€45
Martín Cortés
1570 · Good
€745
A. Pierson
1875 · Very good · NL
€140
Andrew Lang
1895 · Fine
€120
C. Judson Herrick
1931 · Fine
€55