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Happy birthday Robert Bunsen

Robert Wilhelm Eberhard Bunsen (31 March 1811 – 16 August 1899) was a German chemist. With his laboratory assistant, Peter Desaga, he developed the Bunsen burner. Bunsen also worked on emission spectroscopy of heated elements, and with Gustav Kirchhoff he discovered the elements caesium and rubidium. Bunsen developed several gas-analytical methods, he was a pioneer in photochemistry, and he did early work in the field of organoarsenic chemistry.