The Astrophysical Journal, Volume 26University of Chicago Press, 1907 "Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967. Beginning in 2009, the Letters published only online. |
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absorption absorption spectrum Ångström appear Astrophysical Journal Atmos atmosphere atomic bands bath binary bright calcium canal canal rays carbon cell cent CHLORIDE Wave-Length Intensity Chromospheric computed corresponding Curtis curve diameter displacement distance Doppler effect elements emission erbium erbium oxide errors exposure Fabry faint flame given gives Gold hydrogen hydrogen lines increase Intensity and Persistency investigation iron light maximum mean measured mercury metal meteor trains method miles MILLS EXPEDITION mirror moon neodymium Obliterated observations Observatory obtained orbit oxide oxyhydrogen flame paper periastron photographic plates position postpaid pressure prism Professor QUANTITATIVE SPECTRUM radial velocity rays reflection region residuary lines rotation salts seen sensitiveness shown silver slit solar solution spark spectra spectrograph spectroscopic SPECTROSCOPIC BINARY star sun-spots surface TABLE telescope temperature tion tube values vapor visible weakened Yerkes Observatory ΙΟ