Portrait of a Man

1855–1865

Medium: ambrotype
Dimensions: image (visible): 3.1 × 2.5 cm (1 1/4 × 1 in.) mat: 4.2 × 3.5 cm (1 5/8 × 1 3/8 in.) case (closed): 5.1 × 4.5 × 1.7 cm (2 × 1 3/4 × 11/16 in.)
Genre: Photograph
Museum: National Gallery of Art, Washington, DC, US