Frederick Langenheim Looking at Talbotypes, circa 1849–51

Photograph. Date: circa 1849–51. Dimensions: Image: 12.1 × 8.9 cm (4 3/4 × 3 1/2 in.); ; Case: 1.6 × 15.2 × 11.9 cm (5/8 in. × 6 in. × 4 11/16 in.). Medium: daguerreotype. Collection: Metropolitan Museum of Art.