A. Oliver
1795 · Fine
€480
Percival Lowell
1907 · Very good
€25
Camille Flammarion
1887 · Fine
€80
James Ferguson
1760 · Very good
€280
Amédée Guillemin
1886 · Very good
€205
T. W. Webb
1886 · Very good
€145
Heindel, Max, Max Heindel
1918 · Very good
€30
Sir Isaac Newton
1727 · Very good
€475
Robert Ellis, F.L.S.
1852 · Very good
€110
Grant, Robert
1852 · Fine
€130
Alfred Russel Wallace
1908 · Very good
€85
Gerrard Hickson
1922 · Very good
€35
Elias Loomis
1902 · Fine
€55
Euclid
1585 · Very good
€565
Elias Loomis
1883 · Very good
€120
Aristotle
1561 · Very good
€915
Carlton C. Curtis
1907 · Fine
€50
Michael Faraday
1874 · Fine
€65
Jedidiah Morse
1802 · Very good
€130
John Joly
1932 · Very good
€75
William Chauvenet
1899 · Very good
€45
Jules Verne
1888 · Very good
€50
John Bentley
1836 · Very good
€120
Asa Gray
1871 · Very good
€120
William Thomson Kelvin
1889 · Very good
€165
John Harris
1876 · Very good
€85
W. Brennand
1903 · Very good
€70
Martin, Martha Evans, Donald Howard Menzel
1918 · Very good
€25
Alexander von Humboldt
1876 · Very good
€150
Carl Friedrich Gauss
1817 · Fine
€130
Guy Consolmagno, Dan M. Davis
1766 · Very good
€810
James Martineau
1935 · Very good
€80
Jacob Haafner
1851 · Very good · NL
€85
J. Haak
1928 · Very good · NL
€30
Gaylord Johnson
1935 · Very good
€60
John Winthrop
1762 · Very good
€1,010
Albert Verwey
1916 · Very good · NL
€55
William Thomson Kelvin, Peter Guthrie Tait
1884 · Very good
€115
Joseph Pennell
1915 · Very good
€50
Alfred A. Robb
1935 · Very good
€55
Royal Astronomical Society
1879 · Very good
€80
Thomson, Thomas
1802 · Very good
€160
Alfred Wegener
1906 · Very good
€55
Salisbury, Rollin D.
1909 · Fine
€65
Jean-Henri Fabre
1924 · Very good
€65
Plato
1835 · Fine
€145
John Timbs
1871 · Very good
€70
Caleb Bingham
1806 · Fine
€180
Balfour Stewart
1875 · Very good
€120
Sir William Jardine
1806 · Very good
€265
Freda Dinn
1903 · Very good
€35
Howell, Thomas
1909 · Very good
€30
Jacob Abbott
1862 · Very good
€115
Jean André de Luc, Jean André Luc
1808 · Very good
€115
Charles Riborg Mann, George Ransom Twiss
1935 · Very good
€30
Lewis Foreman Day
1910 · Very good
€25
Neltje Blanchan
1906 · Very good
€70
Sturm, Christoph Christian
1815 · Very good
€95
A. Privat-Deschanel
1875 · Very good
€80
J. H. Poynting
1922 · Very good
€35