CHT237259 Bunsen-Kirchoff Spectroscope invented by Robert Bunsen (1811-99) and Gustav Kirchoff (1824-87) in 1859 (engraving) (b/w photo) by German School, (19th century); Bibliotheque Nationale, Paris, France; (add.info.: discovered two alkali metals, cesium and rubidium using spectroscope in 1860;); 穢 Archives Charmet; German, out of copyright.
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Creative#:
TOP26956533
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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No
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No
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No
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