Mikroskopisch-Photographischer Atlas der Harnsedimente 1869

*Mikroskopisch-Photographischer Atlas der Harnsedimente* (Microscopic-Photographic Atlas of Urinary Sediments) is an album of photomicrographs compiled by Austrian physician Robert Ultzmann in 1869. This specific image, from the album housed in the Metropolitan Museum of Art, shows microscopic views of *Dietemum Nacmatobium*, a type of parasite found in the urinary system. Ultzmann's work is a crucial contribution to the field of medical photography and provides valuable insight into 19th-century medical practices. His detailed photomicrographs were essential for the study and diagnosis of various diseases.