John Monroe Van Vleck 1833–1912 Source: Wikimedia Commons About John Monroe Van Vleck American mathematician (1833–1912) People from the Same Era Amzi L. Barber 1843–1909 businessperson Saxtons River Moïse Vautier 1831–1899 politician Geneva Maria Sophia Angelica Massani 1828–1898 Adele Spitzeder 1832–1895 actor, banker, con artist, singer, stage actor Berlin Frederick Norton Manning 1839–1903 physician Rothersthorpe Eduard Müller 1841–1926 lawyer, politician Bonn