Edith Ellen Humphrey (11 September 1875 – 25 February 1978) was a British inorganic chemist who carried out pioneering work in co-ordination chemistry at the University of Zurich under Alfred Werner. She is thought to be the first British woman to obtain a doctorate in chemistry.
On the occasion of the 150th anniversary of the Royal Society of Chemistry (RSC), 8 April 1991, a sample of the original crystals synthesised by Humphrey for her PhD were sent to them by the Swiss Committee of Chemistry, together with a modern CD spectrum of a solution of one crystal. This box of crystals remains on display in the exhibition room of the RSC.
Family and early life
Edith Humphrey was the youngest of the seven surviving children of John Charles Humphrey (1833–1903), a clerk at the London Metropolitan Board of Works, and his wife Louisa (née Frost, 1831–1910), a teacher. John Humphrey had started life in poor circumstances, his father having been a bootmaker, and he was a great supporter of education for his daughters as well as his sons. Edith grew up in a middle-class household in Kentish Town, London. Her two elder sisters became teachers, and her brothers, including Herbert Alfred Humphrey (1868–1951), inventor of the Humphrey pump, and William Humphrey (1863–1898), head of the Fourah Bay College in Freetown, Sierra Leone, were educated to degree level.
Humphrey attended Camden School for Girls and then, from 1891, North London Collegiate School, one of the first girls' schools in the UK to include science in the curriculum. From 1893 to 1897 Humphrey studied chemistry (and physics) at Bedford College, London, with a scholarship of £60 per annum. On completion of her degree, she applied to do a PhD at the University of Zurich.
On 17 October 1898, Humphrey matriculated for chemistry at the University of Zurich. She joined a growing band of Alfred Werner's students, working in the inadequate cellars known as the "Katakomben" (catacombs). Humphrey was awarded a grant of £60 a year for three years by the Technical Education Board of the London County Council, but studying in Switzerland was expensive, and Humphrey was "hard up". Werner recognised Humphrey's ability and appointed her as his assistant, with a salary. Humphrey worked hard, and her account of the time suggests that she found the social life disappointing.
Humphrey was "the first of his students to succeed in preparing Werner's first new series of geometrically isomeric cobalt complexes, a class of compounds that were crucial in his development and proof of his coordination theory." "What a pity for Miss Humphrey that it was not recognized at the time, because she would then have been responsible for an unequivocal proof of the soundness of Werner's coordination theory and the subsequent award of the Nobel prize to him." While one later study has cast doubt on the quality of the sample, Humphrey's status as a pioneer woman scientist remains significant.
Her doctoral thesis Über die Bindungsstelle der Metalle in ihren Verbindungen und über Dinitritoäthylendiaminkobaltisalze was accepted by the University of Zurich in 1901. Humphrey was the first British woman to obtain a doctorate in chemistry, though not the first in Zurich. An American chemist, Rachel Holloway Lloyd, had already done so in 1887, and it had become "a haven for women students from all over Europe".
On completion of her thesis, Humphrey was recommended to move to Leipzig University to continue research under Wilhelm Ostwald. However, the attitude to women there was quite different to Zurich, and she would not tolerate a regime where she was not allowed to work in the laboratories in case her presence distracted the men from their work.
After her return to England, Humphrey joined the staff of Arthur Sanderson & Sons, a British manufacturer of fabrics and wallpaper, where she worked until she retired. She was employed as a research chemist at their factory in Chiswick, but little is known of her work there. In the 1911 census, she was living in Hampstead with her two elder sisters, and gave her profession simply as "chemist".
In 1904, Humphrey was one of nineteen women chemists to petition the Chemical Society for admission of women to fellowship. This was eventually granted in 1919, and Humphrey was subsequently elected to fellowship.
- Rayner-Canham, Marelene; Rayner-Canham, Geoff (23 February 2009). "Fight for Rights" (PDF). Chemistry World. 6 (3): 56–59.
- Congratulatory address and book of isolation of coordination compound by Edith Humphrey from the Swiss Committee of Chemistry to the Royal Society of Chemistry on its sesquicentenary, Royal Society of Chemistry, London, 1991, AR0497 / AR0497a
- Brandon, Ruth (11 September 1975). "Going to Meet Mendeleev". New Scientist. 67 (966).
- Rayner-Canham, Marelene; Rayner-Canham, Geoff (2003). "Pounding on the Doors: The Fight for Acceptance of British Women Chemists" (PDF). Bulletin for the History of Chemistry. 28 (2).
- Humphrey, Edith (June 1900). "The University of Zurich". Bedford College Magazine. Archives, Royal Holloway, University of London: 25–28. BC AS200/3/42.
- Bernal, Ivan; Kaufmann, George B. (July 1987). "The spontaneous resolution of cis-bis(ethylenediamine)dinitrocobalt(III) salts: Alfred Werner's overlooked opportunity". Journal of Chemical Education. 64 (7): 604–610. doi:10.1021/ed064p604.
- Bernal, Ivan (July 1999). "A Sketch of the Life of Edith Humphrey: A pioneer inorganic chemist who barely missed proving Werner's theory of coordination chemistry a decade before it was demonstrated correct.". Chemical Intelligencer. 5 (1): 28–31.
- Ernst, Karl-Heinz; Wild, Ferdinand R W P; Blacque, Olivier; Berke, Heinz (November 2011). "Alfred Werner's Coordination Chemistry: New Insights from Old Samples". Angewandte Chemie International Edition. 50 (46): 10780–7. PMID 21989993. doi:10.1002/anie.201104477.
- Rayner-Canham, Marelene; Rayner-Canham, Geoff (May 2006). "Pioneering Women Chemists of Bedford College". Education in Chemistry.