[Spectrum (graduated intensity developed with pyrogalol)]
Image Not Available

[Spectrum (graduated intensity developed with pyrogalol)]

Image Not Available
Photograph

Herbert E. Ives

Maker
American, 1882–1953

[Spectrum (graduated intensity developed with pyrogalol)]

1906–1908
Lippmann plate
Image: 1 × 1 7/16 in. (2.6 × 3.6 cm)
Overall (prism): 1 9/16 × 1 9/16 × 1/2 in. (4 × 4 × 1.2 cm)
Mount (glass): 2 5/8 × 2 11/16 in. (6.6 × 6.8 cm)
Other (housing): 6 3/4 × 4 3/4 × 7/8 in. (17.2 × 12 × 2.2 cm)
Gift of Mrs. Herbert E. Ives
1981.3015.0007
Inscriptions Inscribed in ink on label adhered to mount recto, BL: [illegible notation]
Inscribed in ink on label adhered to mount recto, BR: 4 Ag \ 1 cc \ [illegible notation]
Inscribed on envelope: H.E. IVES \ 11 \ Graduated intensity developed with pyrogalol [sic].

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