Photograph of Diffraction Spectrum taken by Professor Henry Draper,University of New York, 1872
AMI/86/D.3.11

Photographs of Iron Arc Spectrum
AMI/80/D.3.11

The Spectrum of Nova Gem., 1912
AMI/84/D.3.11

Photographed by Mr V.M.Slipher Various Spectra, 1904
TOO/21/D.2.12

Spectoral Plates in region of 4250, 1911
CO/44/D.3.12

Coloured Illustrations of Stella Spectra, c.1870
AMI/96/D.3.11