Microscope slide with 28 x 28mm collodion reproduction of grid numbered 1-50 on each axis - squares marked 1/1-50/50. Maltwood finder and manufactured name inscribed diamond. R. & J. beck. R. & J. Beck maltwood finder 1853-1863
Portrait of the scientist, Michael Faraday. This wet collodion positive on glass was used by William Henry Fox Talbot to make a photographic, or photoglyphic engraving on paper. Portrait of Michael Faraday before 1877