German geographer; born at Strzelno, Prussia, 1800; died at Berlin Dec. 12, 1893. He was educated in Berlin, where he became acquainted with Alexander von Humboldt, who assisted him in various ways. He wrote: "Afrika" (1835); "Historisch-Geographischer Atlas" (1836-40); "Gesch. der Geographie" (1840); "Alexander von Humboldt" (1842); "Humboldt's Reisen in Amerika und Asien" (1844); "Gesch. der Geographischen Entdeckungen" (1882); "Die Entdeckungs- und Forschungsreisen in den Beiden Polarzonen" (1886). His last years he spent in the Jewish home for aged people in Berlin.