The American Cyclopædia (1879)/Ideler, Christian Ludwig

IDELER, Christian Ludwig, a German mathematician, born at Gross-Brese, in Brandenburg, Sept. 21, 1766, died Aug. 10, 1846. His earliest work was the editing in 1794 of an astronomical almanac for the Prussian government. He taught mathematics and mechanics in the school of woods and forests, and also in the military school, and in 1821 became professor in the university of Berlin. His works include Historische Untersuchungen über die astronomischen Beobachtungen der Alten (Leipsic, 1806); Handbuch der mathematischen und technischen Chronologie (Berlin, 1825-'6); and Die Zeitrechnung der Chinesen (Berlin, 1839).