|1.||Bertrand (Arthur William), 3rd Earl. 1872--1970, British philosopher and mathematician. His books include Principles of Mathematics (1903), Principia Mathematica (1910--13) with A. N. Whitehead, Introduction to Mathematical Philosophy (1919), The Problems of Philosophy (1912), The Analysis of Mind (1921), and An Enquiry into Meaning and Truth (1940): Nobel prize for literature 1950|
|2.||George William pen name æ. 1867--1935, Irish poet and journalist|
|3.||Henry Norris. 1877--1957, US astronomer and astrophysicist, who originated one form of the Hertzsprung--Russell diagram|
|4.||John, 1st Earl. 1792--1878, British statesman; prime minister (1846--52; 1865--66). He led the campaign to carry the 1832 Reform Act|
|5.||Ken. born 1927, British film director. His films include Women in Love (1969), The Music Lovers (1970), The Boy Friend (1971), Valentino (1977), Gothic (1986), and The Rainbow (1989)|
|Russell (rŭs'əl) Pronunciation Key
American astronomer who studied binary stars and developed methods to calculate their mass and distances. Working independently of Ejnar Hertzsprung, Russell also demonstrated the relationship between types of stars and their absolute magnitude. This correlation is now known as the Hertzsprung-Russell diagram.