Digital image of an albumenized salt print (photograph), given the title "Der polygraphische Apparat k. k. Hof- und Staatsdruckerei in Wien"
<a href="//commons.wikimedia.org/wiki/Alois_Auer" title="Alois Auer">Alois_Auer</a>
1853
reproduced at artnet. <a rel="nofollow" class="external autonumber" href="http://www.artnet.com/Artists/LotDetailPage.aspx?lot_id=C612B048190B6424577BA6468E8C1D91">[1]</a>