National economists, camera and agricultural scientists. 26 autographs. 1800-1881. Excellent representatives of her field, mostly as university professors. Lecture announcements for the "Schwarze Brett" as well as letters and cards. Available: Adolphe Jérôme Blanqui l'ainé (1798-1854), Karl Victor Böhmert (1829-1918), Johann Anton von Brentano (1803-1870), Lujo Brentan (1844-1931), Georg von Bunsen (1824-1896), Johann Friedrich Gottfried Eiselen (1785-1865), Hugo Eisenhart (1811-1893), Johannes Fallati (1809-1855), Michel Chevalier (1806-1879), Johannes Conrad (1839-1915), Heinrich Bernhard Oppenheim (1819-1880, 2), Karl Heinrich Rau (1792-1870, 3), Gustav Schmoller (1838-1917), Karl Schüz (1811-1875), Friedrich Gottlob Schulze (from Gävernitz, 1795-1860), Hermann Schulze-Delitzsch (1808-1883, 2), Friedrich Benedict Weber (1774-1848, 4), Max Wirth (1822-1900).