William Kingdon Clifford
1914 · Fair
€35
Yogananda Paramahansa
1931 · Fine
€125
René Descartes
1655 · Fine
€1,820
William Thomson Kelvin, Peter Guthrie Tait
1868 · Good
€65
Denison Olmsted
1868 · Good
€60
Herbert Spencer
1882 · Very good
€105
Marcet Mrs
1828 · Good
€155
Immanuel Kant, Kant
1816 · Very good
€155
Immanuel Kant, Alain Renaut
1807 · Very good
€330
Colin MacLaurin
1753 · Very good
€835
Auguste Comte
1801 · Very good
€250
Aristotle
1811 · Good
€125
Schwegler, Albert
1864 · Fine
€120
Max Scheler
1935 · Good
€20
Alexander Campbell Fraser
1901 · Good
€75
Thomas Roderick Fraser, Andrew Dewar
1881 · Fair
€95
George Fownes
1848 · Very good
€200
Gottfried Wilhelm Leibniz
1721 · Good
€460
Weber, Alfred
1909 · Good
€60
George Henry Lewes
1883 · Very good
€65
Leonhard Euler
1805 · Fair
€60
James Finley Weir Johnston
1855 · Very good
€225
Francis Bacon
1765 · Very good
€480
Herbert Spencer
1867 · Good
€45
Auguste Comte
1867 · Fair
€50
Thomas Troward
1922 · Good
€30
Friedrich Schiller
1935 · Fair
€20
Friedrich Fröbel
1913 · Good
€20
Josiah Royce
1903 · Very good
€65
Rudolf Otto
1929 · Fine
€35
René Descartes
1912 · Very good
€85
Morris Raphael Cohen
1935 · Fine
€35
Bertrand Russell
1935 · Good
€85
John Cowper Powys
1933 · Very good
€50
Adam Smith
1798 · Very good
€500
Ralph Waldo Emerson
1851 · Very good
€130
Upton Sinclair
1927 · Very good
€75
Rabindranath Tagore
1935 · Good
€30
Clive Bell
1924 · Very good
€115
Cooke, Josiah Parsons
1883 · Good
€60
Felix O'Gallagher
1786 · Good
€265
David Hume
1762 · Fine
€415
Plato
1889 · Good
€60
Constantin-François Volney
1796 · Fine
€355
George Santayana
1935 · Very good
€75
Iamblichus, L. Deubner
1746 · Good
€250
Seneca the Younger
1531 · Fair
€1,440
Joseph Le Conte
1928 · Very good
€30
William James
1931 · Good
€40
Three Initiates
1928 · Good
€20
Edmund Law
1746 · Very good
€565
Justus von Liebig, J. von Liebig
1845 · Fair
€105
Alfred Daniell
1888 · Good
€70
Justus von Liebig
1842 · Very good
€135
John Joly
1932 · Very good
€75
Friedrich Christian Accum
1816 · Good
€110
A. S. Neill
1935 · Very good
€45
Maria Montessori
1931 · Good
€110
William De Witt Hyde
1935 · Very good
€25
Plato
1864 · Good
€100