1852
ID: 405
Francis Guthrie proposes the Four Color Problem while coloring a map of English counties
ID: 405
1852
ID: 890
Uncle Tom's Cabin published - Elite obsession with saving underclasses
ID: 890
1852
ID: 891
Massachusetts implements first compulsory education law
ID: 891
1852
ID: 892
Theodor Fontane begins work as war correspondent, later Prussia's greatest realist novelist
ID: 892