The simple northern lights observatory at Haldetoppen
Författare/Upphovsman:
Kristian Birkeland
Kreditera:
Sourced from the book, The Norwegian Aurora Polaris Expedition 1902-1903, Volume 1: On the Cause of Magnetic Storms and The Origin of Terrestrial Magnetism, Section 2. Chapter VI: p.667 (published in 1913), By Kristian Birkeland (1867-1917) also on the Web at http://www.catastrophism.com/texts/birkeland/
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Beskrivning:
The simple northern light observatory at Halddetoppen where Birkeland and his assistants lived in the winter of 1899-1900.
From the book, The Norwegian Aurora Polaris Expedition 1902-1903, Volume 1: On the Cause of Magnetic Storms and The Origin of Terrestrial Magnetism, Section 2. Chapter VI: p. 6
Licens:
Public domain
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