Career
He traveled extensively in South America in the years 1857-1863 and published the results of his explorations in several volumes, including Studien unter den Tropen Amerikas (“Studies among the American tropics,” 2d ed, 1879), ‘Aus dem Pflanzerstaate Zulia’ (“From the plantation state of Zulia,” 1881). From 1872 to 1896 he published the Landwirthschaftliche Jahrbücher (“Agricultural yearbooks”).