Lithograph from Adolphe Duperly's 'Daguerian Excursions in Jamaica.' It is a view of the Ordnance Yard taken from Port Royal Street. The daguerreotype process suffered from a number of limitations. Chief among these was the fact that it produced a unique image on a silvered metal plate. Unlike the negative-positive processes, which in time superseded it and from which any number of prints could be made, further exposures were required for each new image. An additional drawback, most apparent in topographical or architectural studies, was the fact that the daguerreotype image was laterally reversed. In terms of technical production, the reproduction of daguerreotypes was the subject of considerable research in the early days of photography. Numerous processes were devised to etch directly onto the daguerreotype and to use it as a printing plate, but these met with limited success, although such a process corrected the lateral reversal of the original image. More commonly, the original plate was traced or otherwise copied and used as the basis for lithographic or other printing processes.