Parabola Optica

1931 (printed 1974)

Image: 9 1/4 x 7 in. (23.5 x 17.8 cm)
Paper: 9 1/4 x 7 in. (23.5 x 17.8 cm)
Mount: 19 3/4 x 14 3/4 in. (50.2 x 37.5 cm)

Photo-Gelatin silver