Richard Wilhelm Bunsen (1811-1899), German chemist discovered cesium and rubidium

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Richard Wilhelm Bunsen (1811-1899), German chemist discovered cesium and rubidium by French School. Available as an art print on canvas, photo paper, watercolor board, natural paper, or Japanese paper.
19th century · 19 century · xix century · xixth century · nineteenth century · c19th · 19 xixe xix xixe siècle · 19 nineteenth nineteenth nineteenth century · 19 19th 19th 19th xix 19th century · 19 19th xix xixth century · 19. century · early xix century · late nineteenth century · engraving · portrait · / Bridgeman Images