Lithographic portrait of robert brown (1773 – 1858), a scottish botanist and discoverer of brownian motion. After a photography by maull and polyblanck. The lithograph was originally published as part of a folio volume: lenoir, george andré (1860) (in german) gallerie ausgezeichneter naturforscher, vienna, austria oclc: 46724612. Date: 1859.
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