Robert Wilhelm Eberhard Bunsen (30 March 1811 – 16 August 1899) was a German chemist. He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff. From the Book Les merveilles de la science, ou Description populaire des inventions modernes [The Wonders of Science, or Popular Description of Modern Inventions] by Figuier, Louis, 1819-1894 Published in Paris 1867
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