Justus von Liebig
1850 · Good
€80
Lewis Mumford
1935 · Very good
€25
Clarence E. Edwords
1893 · Very good
€100
John Ruskin
1879 · Good
€100
Worthington Hooker
1865 · Good
€50
John Stuart Mill
1891 · Very good
€65
Eugène-Emmanuel Viollet-le-Duc
1875 · Good
€115
Charles Hamilton Smith
1850 · Very good
€60
Justus von Liebig
1856 · Fair
€70
Ludwig Gattermann
1930 · Good
€75
William C. Jago
1889 · Fair
€60
Marion Lowell
1897 · Good
€55
Ernst H. F. Meyer
1864 · Fine
€75
William Henry Bragg
1925 · Fair
€20
Dionysius Lardner
1875 · Very good
€50
Jacob Mijers
1897 · Very good · NL
€85
John Charles Van Dyke
1905 · Very good
€35
Charles Kingsley
1881 · Fair
€45
Snyder, Harry
1925 · Good
€20
Robert Chambers
1867 · Good
€120
Søren Kierkegaard
1884 · Good
€50
L. de Bree
1916 · Good · NL
€20
Steven S. Zumdahl
1915 · Good
€45
Jean Marie Antoine Gevers Leuven
1904 · Good · NL
€20
W. Hamilton Gibson
1910 · Good
€20
Henry E. Roscoe
1906 · Good
€45
Thomas Hill Green
1886 · Good
€160
Babcock & Wilcox Company.
1921 · Fine
€65
John Addington Symonds
1890 · Good
€105
E. J. Banfield
1923 · Good
€35
Lankester, E. Ray Sir
1925 · Good
€55
John Merle Coulter
1912 · Good
€55
Mary Somerville
1863 · Good
€170
Christopher Morley
1935 · Good
€30
Grant Allen
1900 · Good
€65
Jean-Henri Fabre
1924 · Very good
€65
Alexander Findlay
1911 · Very good
€35
Henry Paul Talbot
1932 · Fine
€55
Charles Darwin
1894 · Good
€45
Jane Andrews
1890 · Good
€85
Jean Louis Rodolphe Agassiz
1884 · Fair
€50
Charles Darwin
1851 · Very good
€145
Jacob Abbott
1862 · Very good
€115
Peter Kropotkin
1903 · Fair
€15
Clarence King
1925 · Good
€65
Martin, Geoffrey
1931 · Good
€25
John Aubrey
1873 · Very good
€115
Larry L. Mai
1925 · Very good
€65
Ira Remsen
1888 · Very good
€120
Alfred Walter Stewart
1912 · Good
€25
Edgar Fahs Smith, Harry Frederick Keller
1892 · Good
€65
Arabella B. Buckley
1887 · Good
€45
Ralph Waldo Emerson
1880 · Good
€60
Plotinus
1916 · Good
€75
Michael Faraday, Crookes, William Sir
1864 · Very good
€90
Thorstein Veblen
1935 · Very good
€65
Stone, Witmer
1905 · Fair
€20
Mellor, Joseph William
1925 · Good
€35
John Ruskin
1895 · Very good
€145
Oswald Cockayne
1886 · Fair
€55