Pavel Yablochkov, Russian
Gustav Froment, French electrical engineer
Charles de Changy, French engineer
Theodose Du Moncel, French physicist
Marcel Deprez, French electrical engineer
Johann Philipp Reis, German inventor
Pierre-Paul Riquet, French engineer
Salomon de Caus, French engineer
Tessie du Motay, French chemist
Georges-Auguste Leschot, French watchmaker
Early electric telegraph receiver, 19th Century illustration
Georges-Louis Le Sage, Swiss physicist
Louis Breguet
Blaise Pascal, French mathematician
Nikola Tesla, caricature
Armand-Pierre Seguier, French lawyer
Early telegraph printing receiver, 19th C illustration
Louis Breguet, French physicist
Cornelius Herz, French physician
Carl Von Steinheil, German physicist
Jules Janssen, French astronomer
Guillaume Carcel, french inventor
Henri de Ruolz, French industrial chemist
Moritz Hermann von Jacobi, German physicist
Philippe Lebon, French engineer
Otto von Guericke, German physicist, 19th C illustration
Johann Kunckel, German chemist
Franz Achard, German chemist
Carl Ritter, German geographer
Denis Papin, French physicist
Early electric telegraph machine, 19th Century illustration
Claude Adrien Helvetius, French philosopher
Magneto-electric machine, 19th century illustration
Nikola Tesla, Serb-US physicist, illustration
Early electric engine, 19th Century illustration
Leon Foucault, French physicist
Andre-Marie Ampere, French physicist
Istvan Turr, Hungarian revolutionary
Werner Siemens, German electrical engineer
Robert Bunsen, German chemist
William Shockley, US physicist
Thomas Edison, US inventor, artwork
Elie de Beaumont, French geologist
Alfred Nobel, Swedish chemist
Giovanni Caselli, Italian physicist
Marie Curie, Polish-French physicist
James Watt, caricature
Jean Chaffanjon, French explorer
Louis Thenard, French chemist
Aime Thome de Gamond, French engineer
Joseph Priestley, caricature
August Kekule, German chemist
Rene Descartes, French mathematician
Charles Wheatstone, British physicist
Jacques Charles, French balloonist
Francois Sudre, French composer
Ernest Petin, French balloonist
Franklin's kite experiment, illustration
Compound microscope, 17th Century artwork
Robert Stirling, Scottish clergyman and inventor
David Hilbert, caricature
Henri Poincare, caricature
Newton's cradle with his 'Principia', illustration
Georg Riemann, German mathematician
Evariste Galois, French mathematician
Albert Tissandier, French architect
Karl Etzel, German railway engineer
Alessandro Volta, Italian physicist
Wilhelm Roentgen, German physicist
Pierre-Oscar Figuier, French chemist
Theophile-Jules Pelouze, French Chemist
Gaspare Aselli, Italian surgeon
Andreas Vesalius, Belgian anatomist
Richard Trevithick, British engineer
Xavier Bichat, French anatomist
Hughes' carbon microphone, 19th century
Lord Kelvin, British physicist
John Scott Haldane, caricature
Elisha Gray, American electrical engineer
17th Century rooftop observatories
Leonard Euler, caricature
Comte de Buffon, French naturalist
Galileo Galile, Italian astronomer
Jules-Auguste Beclard, French physician
Lord Kelvin, caricature
Benjamin Thompson, US physicist, 19th Century illustration
Making nitroglycerine, 19th Century illustration
Jacques-Constantin Perier, French engineer
Athanasius Kircher, German Jesuit scholar
Henri Etienne St Claire Deville, French chemist
Max Planck, caricature
Werner Siemens, german inventor
Tim Berners-Lee, British computer scientist
Rudolph Diesel, German mechanical engineer
Heinrich Dove, Prussian physicist
Zenobe Gramme, Belgian engineer
Gaspare Aselli, Italian surgeon, illustration
Kurt Godel, caricature
Albrecht von Haller, Swiss anatomist, illustration
Richard Feynman, caricature
Augustin Cauchy, caricature
Ernst Kummer, caricature
Karl Friedrich Gauss, caricature
Richard Owen, British palaeontologist
Edward Whitehouse, telegraph engineer
Evangelista Torricelli, Italian physicist
19th Century nitroglycerine laboratory, illustration
Felix Wankel, German engineer
Herschel's 40 foot telescope, 19th Century illustration
Moncure Robinson, US civil engineer
Sebastien Vauban, French military engineer
Persi Diaconis, US mathematician
Friedrich von Schelling, German philosopher
Prince Henri d'Orleans and Gabriel Bonvalot, explorers
Johannes Gutenberg, German printer
Francois Roudaire, French military officer and geographer
Philipp Lenard, German physicist
Albrecht Thaer, German agronomist
Karl Popper, Austrian-British philosopher
Watt's steam engine, historical artwork
Emile Flourens, French politician
Umberto I of Italy, 19th Century illustration
Leopold II, King of Belgium
Maria Christina, Queen of Spain
Jean Jacques Victor Coste, French biologist
David Hughes, US inventor
Moritz von Jacobi, German physicist
Johann Kaspar Lavater, Swiss theologist
Anne Louise Germaine Necker, French writer
Edison's incandescent light bulb, 19th century
Guyton de Morveau, French chemist
Ernest Rutherford, caricature
Tiberius Cavallo, Italian physicist
Johan De Witt, Dutch statesman and mathematician
Joseph Lakanal, French politician
Pierre de Fermat, caricature
Christiaan Huygens, caricature
Robert Goddard, US rocket scientist
Denis Papin, French physicist, artwork
Niklaus Riggenbach, Swiss engineer
Benjamin Franklin, US scientist
Max Born, German physicist
Oswald Avery, US molecular biologist
Jacques-Louis De Pourtales, Swiss banker
Jean-Pierre Blanchard, French balloon pioneer
Joseph Louis Proust, French chemist
Emile Pereire, French banker and businessman
Brain and spinal anatomy, 19th century illustration
Niels Bohr, caricature
Luigi Galvani, Italian physician
Albert Einstein, German physicist
Abraham Maslow, US psychologist
Fred Hoyle, caricature
Archimedes, caricature
Fluorine preparation, 19th Century illustration
Galileo Galilei, Italian astronomer
Arthur Cayley, caricature
Charles Babbage, caricature
Dmitri Mendeleev, caricature
David Hume, Scottish philosopher