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Dorothy Maud Wrinch

Mathematician and biochemical theorist

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Through Biochemistry, Protein and Logic

Early life and career

Dorothy Wrinch was born in Rosario, Argentina, the daughter of Hugh Edward Hart Wrinch, an engineer, and Ada Souter. The family returned to England and Dorothy grew up in Surbiton, near London.

She attended Surbiton High School and in 1913 entered Girton College, Cambridge to read mathematics. Wrinch often attended meetings of the Heretics Club run by Charles Kay Ogden, and it was through a 1914 lecture organised by Ogden that she first heard Bertrand Russell speak. She graduated in 1916 as a wrangler.

For the academic year 1916–1917, Wrinch took the Cambridge Moral Sciences tripos and studied mathematical logic with Russell in London. In December she was invited to Garsington Manor, the home of Russell's then mistress Ottoline Morell, and there encountered Clive Bell and other Bloomsbury Group members, and in 1917 she introduced Russell to Dora Black who would later become his second wife. From 1917 Wrinch was funded by Girton College as a research student, officially supervised by G. H. Hardy in Cambridge but in practice by Russell in London. When, in May 1918, Russell was imprisoned for his anti-war activities, Wrinch assisted with his writing projects by bringing him books and articles.

Wrinch secured the first publication of Ludwig Wittgenstein's (not yet so named) Tractatus in a German philosophical journal in 1921.

In London Wrinch attended the Aristotelian Society, including a debate between D'Arcy Thompson and John Scott Haldane on the nature of physics, biology and psychology, and she became a friend of Thompson. Wrinch spoke to the Society herself on the 'summation of pleasures', and through the Society she encountered Harold Jeffreys and Raphael Demos. In the autumn of 1918 Wrinch registered for graduate study on asymptotic expansions with the applied mathematician John Nicholson at King's College London, started to teach at University College London, and continued to work with Jeffreys on the philosophy of scientific method. She moved into a flat in Mecklenburgh Square owned by Russell's then mistress Colette O'Neil. In 1920 Girton awarded Wrinch a four-year Yarrow Research Fellowship with the freedom to work on any area of her choice. In 1920 she was awarded an MSc and in 1921 a DSc by the University of London. Wrinch moved to Oxford in 1922 upon her marriage, where she held a succession of research fellowships and lectureships or tutorships at the Oxford women's colleges for the next 16 years. She was Lady Carlisle Research Fellow at Somerville College, Oxford and first woman lecturer in mathematics at the university. In 1929 she was the first woman to receive an Oxford DSc.

Wrinch's first paper was a 1917 defence of Russell's philosophy, and between 1918 and 1932 she published 20 papers on pure and applied mathematics and 16 on scientific methodology and on the philosophy of science. At the 1928 International Congress of Mathematics in Bologna she delivered the paper "On a method for constructing harmonics for surfaces of revolution." She also presented on "Harmonics Associated with Certain Inverted Spheroids" at the 1932 ICM in Zürich." The papers she wrote with Harold Jeffreys on scientific method formed the basis of his 1931 book Scientific Inference. In the Nature obituary Jeffreys wrote, "I should like to put on record my appreciation of the substantial contribution she made to [our joint] work, which is the basis of all my later work on scientific inference."

From about 1932 Wrinch shifted towards theoretical biology. She was one of founders of the Biotheoretical Gathering (aka the 'Theoretical Biology Club'), an inter-disciplinary group that sought to explain life by discovering how proteins work. Also involved were Joseph Henry Woodger, Joseph and Dorothy Needham, C. H. Waddington, J. D. Bernal, Karl Popper and Dorothy Crowfoot Hodgkin. From then on Wrinch could be described as a theoretical biologist. She developed a model of protein structure, which she called the "cyclol" structure. The model generated considerable controversy and was attacked by the chemist Linus Pauling. In these debates Wrinch's lack of training in chemistry was a great weakness. By 1939, evidence had accumulated that the model was wrong but Wrinch continued working on it. However, experimental work by Irving Langmuir done in collaboration with Wrinch to validate her ideas catalysed the principle of the hydrophobic effect being the driving force for protein folding.

In 1936 Ida Busbridge secured a position as assistant to Wrinch from whom she took over mathematics tutorials for all five women’s colleges.

In 1939 Wrinch moved to the United States. She had a variety of teaching positions at three small Massachusetts colleges, Amherst College, Smith College, and Mount Holyoke College. From 1942 until she retired in 1971 Wrinch held research positions at Smith.

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