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The P Cygni Characteristics of H D
Curves of Growth for Neutral and Ionized Atoms in
A Motion Picture Record in Colour of the Total Eclipse
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absolute magnitude absorption lines abundance appear Aurigae binary blue-green bright calculated camera carbon stars chromospheric chromospheric lines cluster cometary comparison component computed continuum convergent curve of growth Cygni derived determined dispersion displacement Dominion Astrophysical Observatory Draconis eclipse effect emission lines emission-line stars equivalent width excitation potential give given helium high-dispersion hydrogen lines indicated ingress intensity tracings isotopic km./sec laboratory luminosity McKellar mean measured method model atmosphere molecule Mount Wilson nebulae neutral iron normal O-type observed obtained Persei phase photographed plates plotted present prisms probable error proper motions R. M. Petrie radial velocities ratio region relative residuals rotational Royal Astronomical Society secondary spectrum shown single-prism slit Society of Canada solar spectral type spectrograms spectroscopic stellar atmosphere stellar spectra strong Struve Swan bands Table Tauri turbulent velocity Ursa Major values variable Victoria violet visual wave-lengths Zeta Aurigae