Observations of Comets, 1877 I., II., III., VI., 1880 III., 1882 III., and 1884 III., made at Dun Echt Observatory, with the 15-in. Refracting Telescope | Zendy

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Observations of Comets, 1877 I., II., III., VI., 1880 III., 1882 III., and 1884 III., made at Dun Echt Observatory, with the 15-in. Refracting Telescope

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