Cicero, Roman philosopher
Sallust, Roman historian
Persius, Roman poet
Seneca the Elder, Roman orator
Jean-Jacques Rousseau, French philosopher
Albrecht Wilhelm Roth, German botanist
Agrippa, Roman general
Alfred Brehm, German zoologist
Jules Verne, French novelist
Aristotle, Ancient Greek philosopher
Constantine I, Roman emperor
Arthur Schopenhauer, German philosopher
Heinrich Schliemann, German archaeologist
Jeremy Bentham, British philosopher
Hermann Kolbe, German chemist
Joseph Jackson, English typefounder
Edward Kelley, English astrologer
Ernst von Bergmann, German surgeon
Richard Dawkins, British science writer
B. F. Skinner, caricature
Virgil, Roman poet
Robert Brown, Scottish botanist
Crawford Long, US surgeon
Carl Merck, German naturalist
Adolf Bastian, German ethnologist
Heinrich Barth, German explorer
Christian Ehrenberg, German naturalist
Carl Ritter, German geographer
Louis Stromeyer, German surgeon, artwork
Hermann von Wissmann, German explorer
Friedrich Jahn, German gymnastics teacher
Bernhard von Gudden, German anatomist
Ernst von Dechen, German geologist
Friedrich von Frerichs, German optician
Ferdinand von Hebra, Austrian physician
Wilhelm Foerster, German astronomer
Henri Becquerel, French physicist
George Boole, British mathematician
Henrik Ibsen, Norwegian playwright
John Hunter, Scottish surgeon
Max Planck, caricature
Charles Darwin, caricature
John Scott Haldane, caricature
Joseph Lister, British surgeon
Moliere, French playwright
John Fothergill, English physician
Richard Pulteney, British botanist
William Cuming, Scottish physician
Steven Pinker, Canadian psychologist
Matt Ridley, caricature
George Berkeley, Irish philosopher
Prokop Divis, Czech scientist
Heinrich Dove, Prussian physicist
Victor Hugo, French Author, illustration
Martin Lichtenstein, German physician
Henry Cavendish, British chemist
Charles Coulomb, French physicist
Heinrich Hertz, German physicist
James Joule, British physicist
Hans Christian Oersted, Danish physicist
Georg Ohm, German physicist
Alessandro Volta, Italian physicist
Dmitri Mendeleev, caricature
James Clerk Maxwell, caricature
19th Century velocipede, artwork
19th Century ladies handcar, artwork
Voltaire, French author
William Shakespeare, English playwright
Patrick Moore, British astronomer
John Logie Baird, caricature
Ancient Assyrian bas relief, illustration
William Cullen, Scottish physician
Brian Cox, caricature
Celsus, Roman encyclopaedist
Arthur C. Clarke, British futurist
Isaac Asimov, US author and biochemist
Stephen Gould, US palaeontologist
19th Century washing machine, artwork
John Lindley, British botanist
Karl Popper, Austrian-British philosopher
Marguerite Gardiner, Irish writer
Alfred Tennyson, poet, illustration
Delaware state flag
Xavier Marmier, French author, illustration
William Penn, English coloniser
Homer, Ancient Greek poet
Andre-Marie Ampere, French physicist
Ernest Rutherford, caricature
Joseph Lagrange, caricature
Burning objects, 15th century
Theodosius I, Roman Emperor
Hadrian, Roman emperor
19th Century penny-farthing, artwork
James Hutton, British geologist
Robert Oppenheimer, US physicist
Robert Watson-Watt, British physicist
Alfred Wegener, German geophysicist
Andrew Wiles, British mathematician
Christiaan Huygens, caricature
Socrates, Ancient Greek philosopher
Francesco di Giorgio Martini, Italian architect and painter
Gods on Mount Olympus, 19th Century illustration
Daniel Dennett, US cognitive scientist
John Maynard Smith, caricature
Plato, Ancient Greek philosopher
Horatio Nelson, British naval commander
Albrecht Durer, German artist
Michelangelo, Italian artist, 19th Century illustration
Michelangelo, Italian artist, 19th century illustration
Charles Christofle, French jeweller
Francis Bacon, English philosopher
vector silhouette of the smith on white background
Watt's steam engine, historical artwork
Henry Stanley, Anglo-American explorer
Benjamin Franklin, US scientist
Meteorite on a white background vector illustration
Johann Kaspar Lavater, Swiss theologist
Anne Louise Germaine Necker, French writer
Emil Rossmassler, German biologist
Samuel Pepys, English diarist
Thomas Carlyle, Scottish writer
John Nichols, British antiquarian
William Gifford, British poet and editor
Mary Walker, US surgeon and feminist
John Lubbock, British biologist
Denis Diderot, French encyclopedist
Etienne Arago, French writer
Niels Bohr, caricature
家族と暮らし
Roman library, Late Roman Empire
Albert Einstein, Swiss-German physicist
Hermann von Helmholtz, German physicist
J. J. Thomson, British physicist
19th Century adjustable school desk
19th Century school desk back support
Roman arch construction, artwork
Julius Caesar, Roman statesman, illustration
Eroded sandstone, illustration
Geology fields, conceptual illustration
サラリーマン日記
Jules Verne, French author, 20th C illustration
Claude Adrien Helvetius, French philosopher
Friedrich von Schelling, German philosopher
Sargon II of Assyria, bas relief
Oak treehouse, 19th Century illustration
19th Century parallel-flow turbine
John Bardeen, US physicist
Linus Pauling, US chemist
Archimedes, caricature
Frank Whittle, caricature
Thomas Sonnet de Courval, French poet
Traditional Chinese Painting, Beautiful People,
Alan Turing, British mathematician
Carl Jung, caricature
Sigmund Freud, caricature
Pedanius Dioscorides, Greek physician
James Whistler, US painter, 19th C illustration
George Romney, British painter
Frederic Bartholdi, French sculptor
Peach Prunus persica, artwork
Carbon microphone, 19th century illustration
Early 19th-century whaleboat
Nerium oleander, 19th century
Gymea lily, 19th century
Strobilantes flowers
Clove plant flowers and fruit
Cinnamon flowers and leaves
Osbeckia chinensis flowers
Cucumber tree fruits
Malay apple flowers and fruit
Purple gentian flowers
Nutmeg fruits and seeds
Malabar arrowroot flowers and rhizome
Black pepper growing on the vine
Green tea flowers and fruits
East Indian Klugia flowers
Tobacco flowers
Cashew plant fruit and nuts
Water lily (Nymphaea ampla), artwork
19th Century amphibious vehicle, artwork
19th Century safety lamps, artwork
19th Century internal combustion engine
Nasmyth's steam hammer, artwork
Edmondia sesamoides, artwork
Capillipedium parviflorum, artwork
Alga (Ulva lingulata), artwork
Alga (Ulva pavonia), artwork