Johann G. Hagen

1847 – 1930

• Atlas stellarum variabilium
• Atlas stellarum variabilium
• Synopsis der hoeheren mathematik
• A catalogue of 1001 southern stars for 1850.0, from observations by P. Tacchini, at Palermo, in the years 1867, 1868, 1869
• Die veränderlichen Sterne
• First-[fifth] note on the dark objects in Barnard's Photographic atlas
• Index operum Leonardi Euleri
• La rotation de la terre, ses preuves mécaniques anciennes et nouvelles