Photography in the United States
In spring 1839, the daguerreotype was introduced into the United States by an Englishman named D.W. Seager, who took the first photograph of a view of St. Paul’s Church and a corner of the Astor House in Lower Manhattan in New York City. Painter and inventor Samuel Finley Breese Morse had met Louis Daguerre in Paris in the spring of 1839, becoming the first American to see his photographic process and becoming enamored with it as a result. When he returned to the United States later that year, he enthusiastically promoted the daguerreotype while hailing Seager's prototypical image. Morse had painted "The Gallery of the Louvre" in 1833, and the appeal of the medium of the daguerreotype was an obvious one to him: it was a means of making faithful copies of artworks, in addition to anything else that would be still in front of the slow eye of the camera.
Photography in Denmark
A number of other techniques developed in parallel with the use of daguerreotypes. The ambrotype, using collodium to produce a positive image on glass, and the pannotype, also collodium-based, were both used in Denmark from around 1855. Negative-based paper prints, used from the beginning of the 1850s, were produced on salt paper until around 1857 when salt was replaced by albumen. Collodion emulsion chloride paper was used from 1865 and in 1880 gelatin emulsion paper was introduced.