8 January 1891 , Birth of Walther Wilhelm Georg Bothe

24 January 1891 Birth of Abram Samoilovitch Besicovitch

10 February 1891 Death of Sofia Vasilyevna Kovalevskaya

11 May 1891 , Birth of Robert Raynolds McMath, in Detroit, Michigan, USA

5 July 1891 Birth of John Howard Northrop

3 August 1891 , Birth of Jan Jr. Woltjer in Amsterdam, The Netherlands

19 August 1891 Birth of Milton Lassell Humason in Dodge Center, Minnesota, USA

30 August 1891 Death of Emanoil Bacaloglu

6 September 1891, Birth of Väisälä, Yrjö in Kontiolahti, Utra, (Finland)

16 September 1891 Birth of Maud Worcester Makemson, in Center Harbor, New Hampshire, USA

18 September 1891 Death of William Ferrel in Maywood, Kansas, USA

20 October 1891 Birth of James Chadwick

1891 Death of Carl Wilhelm von Naegeli

1891 Birth of Alfred Henry Sturtevant

1891 Birth of Sir Harold Jeffreys

Chronology 1890 - 1891 - 1892