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This section does not include lectures given as part of courses at Cambridge University which are found in section D9. The surviving materials in this class vary from complete texts to notes and precis and, in the latter period, overhead projector slides.

The items in this series are notes, which, for the most part, are discrete and focused, and are either titled on the note or Batchelor has added a slip of paper bearing a title to the document or file. The contents of some is almost certainly included in lectures and publications

From early in his career Batchelor travelled widely to conferences around the world. The following files may include preparatory materials and follow-up exchanges, though any papers given at or publications arising from conferences are likely to be found in sections K and H respectively.

This class includes two series of Batchelor’s correspondence files and also loose scientific correspondence that was not filed. The alphabetically-arranged files of correspondence (F1 and F2) begin with letters from the 1940s. Probably at the beginning of 1980, with the size of the files increasing, a second series was begun. The files in the first series thus practically finish in 1979, however occasionally letters of a later date were inserted, hence the covering dates of some files in this continue beyond 1979. A third series (F3) has been created for the correspondence that was not filed. A correspondent’s appearance in this third series does not indicate that they do not appear in series F1 and/or F2.

Batchelor was instrumental in the move to establish departments within the mathematics faculty. In 1959 DAMTP was founded with him as first head of department – a role he was not to relinquish until 1983. As such he was able to shape the department, supervising its move into its first consolidated home in former premises of CUP on the Mill Lane site and introducing a fluid dynamics laboratory in the face of opposition from the Department of Physics. He continued as its head of Department until his early retirement in 1983

This class contains a few items relating to Batchelor’s relationship with Trinity College. He was admitted as a Research Student in 1945, elected a Fellow under Title A [Junior Research Fellow] in 1947 and under Title B [Senior Research Fellow] in 1951. Correspondence concerning his admission can be found at BACH/B7

Most, if not all of Batchelor’s papers were left in his rooms at the Department of Applied Mathematics and Theoretical Physics and transferred after his death to Trinity College Library by Professor Keith Moffatt. His surviving papers reflect his wide professional interests. Section H contains manuscripts and working materials for many of his publications. Section I contains notes on various aspects of his subject which he produced throughout his career, many of which are dated. Section K contains texts of conference and special lecture that he gave (faculty lectures are to be found in section D9). Papers relating to his work at DAMTP are in section D and his copious scientific correspondence in section F

After graduating in pure and applied mathematics from Melbourne University, Batchelor planned to study for a PhD at Cambridge, but the outbreak of WWII forced him to remain in Australia, where he undertook research on aeronautics. With encouragement from G I Taylor Batchelor sailed for England in January 1945 and was admitted a Research Student at Trinity College later that year. This section includes material from his time at Melbourne as well as early attempts to find funding for his researches.

Includes ‘Fluid mechanics in Cambridge since 1945’, ‘Geoffrey Ingram Taylor’, ‘The dynamics of hydrosol and aerosol particles’, ‘Forty years with fluid mechanics’, ‘A personal history of post-war turbulence’, ‘A participant’s view of post-war fluid mechanics’, ‘Thirty years with fluid mechanics’ and ‘The scientific heritage of G I Taylor’

Because of the worsening effects of Parkinson’s disease GKB did not finish the paper and was unable to attend the conference