| Advert for the Scovill Manufacturing Company, No.4, Beckman Street, NY 1858 Advert Google Books LL/34673 Published in "Treatise of photography on collodion" by Charles Walkdeck and Peter Neff, Jr, (Second edition, Cincinnati, Longley Brothers, 1858).
Note the mention of Photographic, Ambrotype, Daguerreotype processes and Melainotype Plates.
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