Photograph (Albumen Print, Photomicrograph) of a Microscopical Object, Late 19th Century

Albumen print mounted on card. Photomicrograph of an unidentified microscopical object, circular image border. It is mounted at a careless angle, and two paper fragments attached to the back of the card (seemingly as mounting stickers or hinges) are the printed label from photographic retouching medium supplied by Edwin T. Shelton of Oxford, indicating that the photomicrograph was made in Oxford. No other indication of source.