[Superposed spectra developed with hydrokinon and bleached]
Photograph
[Superposed spectra developed with hydrokinon and bleached]
1906–1908
Lippmann plate
Image: 15/16 × 1 9/16 in. (2.4 × 4 cm)
Overall (prism): 1 3/4 × 1 5/8 × 1/4 in. (4.4 × 4.2 × 0.6 cm)
Mount (glass): 2 7/16 × 2 3/4 in. (6.2 × 7 cm)
Other (housing): 6 11/16 × 4 3/4 × 1 in. (17 × 12 × 2.5 cm)
Gift of Mrs. Herbert E. Ives
1981.3015.0009
Inscriptions Inscribed on envelope: 13 \ Superposed (sic) ["(sic)" has been crossed out] spectra, developed with hydrokinon and bleached.
