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Page:Popular Science Monthly Volume 57.djvu/515

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CHAPTERS ON THE STARS.
PSM V57 D515 Spectra of cygni and tauri.png
Fig. 4. Spectra of α Cygni and α Tauri.
 
 
PSM V57 D515 Spectrum of orionis.png
Fig. 5. Spectrum of α Orionis.
 
 
PSM V57 D515 Spectrum of cassiopeiae.png
Fig. 6. Spectrum of γ Cassiopeæ.