Martersteig, Max
born 11. February 1853 in Weimar; died 3. November 1926 in KölnBrief von Max Martersteig an Hans Vaihinger, 26.05.1916 [26.05.1916]
Leipzig, 26.05.1916 [26.05.1916]Ostwald, Wilhelm
born 2. September 1853 in Riga; died 4. April 1932 in LeipzigBrief von Wilhelm Ostwald an Hans Vaihinger, 17.08.1894 [17.08.94] [17.08.1894]
Leipzig, 17.08.1894 [17.08.94] [17.08.1894]Sudhoff, Karl
born 26. November 1853 in Frankfurt am Main; died 8. October 1938 in Salzwedel