Daguerreotype
Invented by Louis-Jacques-Mandé Daguerre and introduced worldwide in 1839, daguerreotype was almost completely superseded by 1860 with new, less expensive processes yielding more readily viewable images. In the late 20th century, there was a revival of daguerreotypy by a small number of photographers interested in making artistic use of early photographic processes.
George N. Barnard
Starting his business in New York State in 1843, Barnard was one of the first to use daguerreotype, the first commercially available form of photography, in the United States.