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Oersted, Hans Christian (Copenhagen Rudkobing, 1777-1851). Danish physicist and chemistHans Christian Oersted (Copenhagen Rudkobing, 1777-1851). Danish physicist and chemist. Oersted discovers electromagnetism. Colored engraving
Labor movement. Meeting held on May 1890 in Barcelona. The civil governor greets the demonstrators after requesting the reduction of working hours. Catalonia. Spain. Colored engraving
Monks demonstrate a protest with candles
Asia, Japan, Tokyo. Coiled pipe, Tepco Energy Museum, Shibuyaku