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Needham/NRI2/SCC6/24 contains:
<-- See earlier
11 Letter from N. A. Hudleston of Harrogate, Yorkshire, accompanying a postcard of a water-clock in the grounds of the Villa Borghese, Rome, Italy
12 Joseph Needham's notes from a lecture by John Combridge on 'Chinese Astronomical Clockwork (the differentiation of the editions)'
13 Letter from John Combridge of Ilford, Essex, about his work on the history of horology in China, and related documents
14 Postcard showing frescoes in the Cathedral at Gurk in Kärtnen, Austria, dating from 1220
15 Part of a letter from Donald R. Hill, about an article by Wiedemann on 'Musikautomaten' and a reference from al'Jazari showing the need for an escapement
16 Correspondence with André Wegener Sleeswyk of Gronigen, Holland, about the operation of the steelyard clepsydra, and related documents
17 Letter from John Combridge of Ilford, Essex, planning a visit to Cambridge
18 Letter from André W. Sleeswyk of Gronigen, Holland, accompanying photographs of his reconstruction of a steelyard clepsydra
19 Correspondence with Dr. André W. Sleeswyk of Gronigen, Holland, about the publication of his paper 'The Celestial River: A Reconstruction', and related documents
20 Letter from John Combridge of Ilford, Essex, providing notes relating to horological engineering for consideration if a second edition of 'Science and Civilisation in China, Volume 4, Part 2' is published
21 Two typescripts of André W. Sleeswyk's paper 'The Celestial River: A Reconstruction'
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Papers of Joseph Needham as a historian of Chinese science, technology and medicine

Title Correspondence with André Wegener Sleeswyk of Gronigen, Holland, about the operation of the steelyard clepsydra, and related documents
Reference SCC6/24/16
Creator Sleeswyk, André Wegener; Needham, Joseph; Combridge, John.
Covering Dates 19 July 1974–21 May 1975
Extent and Medium 31 sheets; Paper
Content and context

The correspondence comprises 5 letters from Sleeswyk; copy of 1 letter from Joseph Needham.

The related documents comprise draft of Sleeswyk's paper 'The Celestial River: The Problem of the Large Steelyard Clepsydra in Medieval China'; copy of a letter from John Combridge of Ilford, Essex, to Sleeswyk, commenting on the paper.

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