ÅNGSTRÖM, Anders Jonas (1814-1874). Recherches sur le spectre solaire [ Atlas contenant les longeurs d'onde des raies Frauenhofériennes données en 1/10,000000 de millimètre ]. Uppsala: W. Schultz, 1868. A fine copy of the first edition of a classic work on the solar system in which Angstrom demonstrates the presence of hydrogen and a number of other elements in the sun. Solar spectroscopy provided the first scientific evidence (other than the occasional meteorite) that the elements known on earth are also present elsewhere in the universe. Angstrom also established a scale of wave-lengths for measuring spectral lines, replacing Kirchoff's arbitrary scale. Norman 56. 2 volumes, comprising one text volume, large quarto (308 x 240mm) and one atlas, oblong folio (325 x 511mm). Text with lithographic frontispiece showing Ångström's spectrometer, atlas with separate title and 6 lithographic plates after R. Thalén (1827-1905), Ångström's laboratory assistant, loose as issued. Original printed wrappers (very minor fading and a few tiny nicks).
ÅNGSTRÖM, Anders Jonas (1814-1874). Recherches sur le spectre solaire [ Atlas contenant les longeurs d'onde des raies Frauenhofériennes données en 1/10,000000 de millimètre ]. Uppsala: W. Schultz, 1868. A fine copy of the first edition of a classic work on the solar system in which Angstrom demonstrates the presence of hydrogen and a number of other elements in the sun. Solar spectroscopy provided the first scientific evidence (other than the occasional meteorite) that the elements known on earth are also present elsewhere in the universe. Angstrom also established a scale of wave-lengths for measuring spectral lines, replacing Kirchoff's arbitrary scale. Norman 56. 2 volumes, comprising one text volume, large quarto (308 x 240mm) and one atlas, oblong folio (325 x 511mm). Text with lithographic frontispiece showing Ångström's spectrometer, atlas with separate title and 6 lithographic plates after R. Thalén (1827-1905), Ångström's laboratory assistant, loose as issued. Original printed wrappers (very minor fading and a few tiny nicks).
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