He was director of the Mannheim observatory from 1813 to 1815, and then became professor of astronomy in Copenhagen. From 1817 he directed the triangulation of Holstein, to which a few years later was added a complete geodetic survey of Denmark (finished after his death). For the sake of the survey an observatory was established at Altona[?], and Schumacher resided there permanently, chiefly occupied with the publication of Ephemerides (11 parts, 1822-1832) and of the journal Astronomische Nachrichten[?] (founded by himself in 1821 and still being published), of which he edited thirty-one volumes.
This entry was originally from the 1911 Encyclopedia Britannica.
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