Example image of eyePlorer eyePlorer map for 'Johann Christian Poggendorff': 1796 1877 December 29 Germany Hamburg January 24 Physicist Electricity Magnetism Electrostatic generator Electrostatic motor Wilhelm Holtz Apothecary Humboldt University of Berlin Meteorology Mirror galvanometer Royal Swedish Academy of Sciences Optical illusion Poggendorff illusion Johann Karl Friedrich Zöllner Zöllner illusion Emil Frommel Ludwig Wilhelm Gilbert Arthur von Oettingen Charles Étienne Louis Camus Chromic acid cell Johannes Nikolaus Tetens Adolph Wilhelm Hermann Kolbe Nikolay Koksharov Lorenz Hengler Hermann von Fehling Gustav Heinrich Wiedemann Annalen der Physik Heinrich Gustav Magnus Wilhelm Karl Ritter von Haidinger Jérôme Lalande Eilhard Mitscherlich Electrical telegraph John Tyndall Bernhard Walther Alessandro Serpieri Julius Robert von Mayer
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