Photographic portrait of Gustav Kirchhoff, Robert Bunsen, and Henry Roscoe. Left to right: Gustav Kirchhoff (1824-1887) a German physicist, Robert Bunsen (1811-1899) a German Chemist, and Henry Roscoe (1833-1915) an English Chemist. Dated 19th century.

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TOP20951120

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達志影像

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RM

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