1-158-587 - Oxford Science Archive/Heritage Images

Gustav Robert Kirchhoff, German physicist, 1876. Kirchhoff (1824-1887) is known for his work on electricity, heat and optics. His collaboration with Robert Wilhelm Bunsen (1811-1899) on spectrum analysis led, in 1859, to the discovery of caesium and rubidium. He also formulated two laws governing electric networks. From Discoveries and Inventions of the 19th Century by Robert Routledge. (London, 1876).