Vol. 2 (2016): Sophus Tromholt: Om Nordlysets Perioder / Sur les périodes de l'aurore boréale (1882)

The second volume in the series consists of Sophus Tromholt’s bilingual article Om Nordlysets Perioder / Sur les périodes de l'aurore boréale ['On the Periods of the Aurora Borealis'], originally published in the Yearbook of the Danish Meteorological Institute for the year 1880 (published in 1882). The article has been digitized from a copy kept at the University Library of the University of Bergen. It is introduced by a biographical essay and a summary of contents by the Copenhagen-based, independent scholar Kira Moss.