Gustave Robert Kirchhoff (1824-1887), German physicist, 1876. He is known for his work in electricity, heat, and optics. He collaboration with Robert Wilhelm Bunsen (1811-1899) on spectrum analysis led, in 1859, to the discovery of calcium and rubidium. From 'Discooveries and Inventions of the Nineteenth Century' by Robert Routledge (London, 1876). Engraving.

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Gustave Robert Kirchhoff (1824-1887), German physicist, 1876. He is known for his work in electricity, heat, and optics. He collaboration with Robert Wilhelm Bunsen (1811-1899) on spectrum analysis led, in 1859, to the discovery of calcium and rubidium. From 'Discooveries and Inventions of the Nineteenth Century' by Robert Routledge (London, 1876). Engraving.

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Keywords: 1859, analysis, calcium, century, discooveries, discovery, inventions, led, nineteenth, robert, routledge, rubidium., spectrum