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Contents of folder so inscribed: letter from D.R. Hartree, October 1925; copy of Zeitschrift für Physik vol 36 no. 2 (1926), with manuscript calculations inserted in article by A. Unöld, 'Über die Termgrössen der Serienspektren'; manuscript notes.

See also D15.

Contents of folder so inscribed (at a later date). Includes manuscript and typescript synopsis of Course and report of examiners for 1953. Also includes loose note by Jeffreys, 1992, 'Before 1953 Mathematics was a half-subject in the Natural Sciences Tripos. The enlargement to a Whole Subject was largely due to Douglas Hartree. I was an examiner in 1953 and 1954'.

Correspondence re research. See also H41-H55.

Includes notes on the literature, notes on lectures by R.H. Fowler (from p73 and p258), Dirac (from p162). Between pp 60-61 is correspondence from D.R. Hartree with calculations.

Chiefly correspondence with M. Weston-Smith (daughter) re life of Milne. Includes reminsicences of D.R. Hartree.

Jeffreys had a close research association with Hartree, whom she first met as a student at Cambridge in 1925. Her early research under R.H. Fowler on the polarisability of the atomic core was a problem passed on to her by Hartree. Jeffreys moved to Manchester as Assistant Lecturer in Mathematics in 1928 and their association continued the following year when Hartree succeeded E.A. Milne in the chair in Mathematics there. They met less often after Jeffreys return to Cambridge in 1938 but in 1946 Hartree was appointed Plummer Professor of Mathematical Physics at Cambridge.

Jeffreys wrote her reminiscences of Hartree, 'Douglas Rayner Hartree 1897-1958', for Comments on Atomic and Molecular Physics (CAMP), vol. 20.

Contents of folder so labelled: drafts of chapters. No evidence of publication.