Also on these boards
One of the earliest known photographs of a human. Robert Cornelius's self-portrait. The back reads, "The first light picture ever taken." 1839. Robert Cornelius (1809-1893) standing outside his family’s lamp-making shop in Philadelphia. Cornelius was an American of Dutch descent whose knowledge of metallurgical chemistry was to help in perfecting the process of silver-plating, then employed in the production of daguerreotypes.