Portrait of <a href="https://en.wikipedia.org/wiki/Moritz_von_Jacobi" class="extiw" title="en:Moritz von Jacobi">Moritz Hermann von Jacobi</a> (1801–1874), a Prussian scientist who worked mostly in Russia. Jacobi is noted for his invention of <a href="https://en.wikipedia.org/wiki/electrotyping" class="extiw" title="en:electrotyping">galvanoplasty (electrotyping)</a> in 1838 and for work on electric motors and telegraphy.
<bdi><a href="https://www.wikidata.org/wiki/Q18508636" class="extiw" title="d:Q18508636"><span title="artist, lithographer and miniaturist (1820-1882)">Rudolph Hoffmann</span></a>
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Cropped version of a <a rel="nofollow" class="external text" href="http://www.sil.si.edu/digitalcollections/hst/scientific-identity/fullsize/SIL14-J001-02a.jpg">.jpg image</a> posted by the <a href="//commons.wikimedia.org/wiki/Smithsonian_Institution" class="mw-redirect" title="Smithsonian Institution">Smithsonian Institution</a>. The original lithograph is from a book <cite class="book" style="font-style:normal">(1860) <i> Gallerie ausgezeichneter Naturforscher</i>, Vienna, Austria:  <a href="https://de.wikipedia.org/wiki/George_Andr%C3%A9_Lenoir" class="extiw" title="de:George André Lenoir">George André Lenoir</a>  <small></small></cite>. A copy of this book is in the collection of the Dibner Library of rare books and manuscripts at the Smithsonian.