Title: Correspondence
Subjects: Correspondence, Politics and government, Botanical specimens, Evolution (Biology), Philosophy, Seeds, Political science, Social conditions
Places: Europe
People: George Engelmann (1809-1884), Konrad Pasch, Otto Kraus, Karl Christian Friedrich Krause (1781-1832), Carl Nägeli (1817-1891), Franz Seitz, Hermann Karl Leonhardi Freiherr von (1809-1875), Nicolás Salmerón y Alonso (1838-1908)
Time periods: 19th century