Bertha Swirles in 1962
|Born||22 May 1903|
|Died||18 December 1999(aged 96)|
|Alma mater||Girton College, University of Cambridge|
|Institutions||Girton College, University of Cambridge|
|Doctoral advisor||Max Born|
Ralph Howard Fowler
Bertha Swirles, Lady Jeffreys (22 May 1903 – 18 December 1999) was an English physicist, academic and scientific author who carried out research on quantum theory in its early days. She was associated with Girton College, University of Cambridge, as student and Fellow, for over 70 years.
Bertha Swirles was born in Northampton in 1903 to Harriett née Blaxley (born around 1873), a primary school teacher, and William Alexander Swirles (b. 1878), a leather salesman. She was educated at Northampton School for Girls and in 1921 matriculated at Girton College to study mathematics, graduating with first class honours. She became a research student of quantum theory partly under Ralph Fowler at the University of Cambridge, one of a distinguished company of his students that included Paul Dirac and Subrahmanyan Chandrasekhar. She also carried out research at the University of Göttingen under Max Born and Werner Heisenberg.
She received her PhD in 1929, by which time she was an Assistant Lecturer at the University of Manchester. She followed with similar teaching posts at the University of Bristol and then at Imperial College (then the Royal College of Science), London in the 1930s. She returned to Girton College in 1938 as a mathematics lecturer and Fellow of the College. She continued her research into quantum theory, but also expanded her work to include seismology. In 1949 she became Director of Studies for Mathematics at Girton, a position she held until 1969. In this role she supported and developed the teaching of mathematics to women. She held a variety of positions at the College including Vice-Mistress from 1966 to 1969.
In 1940 she married fellow mathematician Harold Jeffreys, and became Lady Jeffreys when he was knighted in 1953.
She died in Cambridge on 18 December 1999 of a stroke.
In 2016 the Council of the University of Cambridge approved the use of Swirles's name to mark Swirles Court, which consists of 325 graduate student rooms, leased by Girton College, within the North West Cambridge Development.
- Sir Harold Jeffreys and Bertha Swirles (Lady Jeffreys), Methods of Mathematical Physics, third revised edition (Cambridge University Press, 1956 — reprinted 1999). This book, first published in 1946, is commonly referred to as Jeffreys & Jeffreys. ISBN 0-521-66402-0, ISBN 978-0-521-66402-8.
Some biographical sketches by Bertha Swirles
- Bertha Swirles, John Arthur Gaunt (1904-1944), Notes and Records of the Royal Society of London, Vol. 44, No. 1, pp. 73–79 (1990). 
- Bertha Swirles, Reminiscences and Discoveries: Harold Jeffreys from 1891 to 1940, Notes and Records of the Royal Society of London, Vol. 46, No. 2, pp. 301–308 (1992). 
- Ruth M. Williams, Bertha Swirles Jeffreys (1903-1999), pp. 178–190, in Out of the Shadows: Contributions of Twentieth-Century Women to Physics, edited by Nina Byers and Gary Williams, 498 p. (Cambridge University Press, 2006). ISBN 0-521-82197-5
- "Jeffreys, Sir Harold (1891–1989), geophysicist". Oxford Dictionary of National Biography. 1 (online ed.). Oxford University Press. 2004-09-23. doi:10.1093/ref:odnb/40027. (Subscription or UK public library membership required.)
- Administrator (2015-01-29). "Street Naming". www.nwcambridge.co.uk. Retrieved 2017-03-08.
- Williams, R. M. (22 December 1999). "Obituary: Bertha Jeffreys". The Independent. Retrieved 26 October 2012.
- Field, John (12 December 2008). "David Tabor. 23 October 1913 - 26 November 2005". Biographical Memoirs of Fellows of the Royal Society. 54: 425–459. doi:10.1098/rsbm.2007.0031. Retrieved 26 October 2012.
- "Presidents of the Association". Mathematical Association. Retrieved 2018-10-06.
- R. M. Williams, Obituary: Bertha Jeffreys, The Independent (London), Wednesday, 22 December 1999. 
- Mary Walmsley, Lady Jeffreys 1903-1999, The Mathematical Gazette, Vol. 84, No. 500, pp. 321–323 (2000). 
- J. A. Hudson, Lady Bertha Swirles, 1903-1999, Astronomy & Geophysics, Vol. 41, No. 3. 36-37 (2000).