Photograph of the Corona, taken by Prof. Henry Draper, M.D. during the total eclipse of July 29th 1878

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“Photograph of the Corona, taken by Prof. Henry Draper, M.D. during the total eclipse of July 29th 1878,” Bibliothèque numérique - Observatoire de Paris, consulté le 17 juillet 2019, https://bibnum.obspm.fr/ark:/11287/1Gxpk.