Janus: Papers of Joseph Needham as a historian of Chinese science, technology and medicine

Needham/NRI2/SCC6/24 contains:
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21	Two typescripts of André W. Sleeswyk's paper 'The Celestial River: A Reconstruction'
22	Letter from Dr. André W. Sleeswyk of Gronigen, Holland, about comments on his paper 'The Celestial River: A Reconstruction' made by John Combridge of Ilford, Essex, and related documents
23	Letter from V. K. Chew of the Science Museum, London, about Dr. André W. Sleeswyk's paper 'The Celestial River: A Reconstruction'
24	Joseph Needham's notes from a discussion with John Combridge, about an alternative [to André W. Sleeswyk's] reconstruction of steelyard clepsydra
25	Letter from Dr. André W. Sleeswyk of Gronigen, Holland, about entering the Rolex prize [with his model of the steelyard clepsydra]
26	Copy of a letter from John Combridge of Ilford, Essex to Dr. A. W. Sleeswyk of Gronigen, Holland, about the construction of the steelyard clepsydra
27	Letter from Dr. André W. Sleeswyk of Gronigen, Holland, about John Combridge's suggestions for an alternative reconstruction of the Chinese steelyard clepsydra
28	Letter from Dr. André W. Sleeswyk of Gronigen, Holland, about problems relating to his reconstruction of the steel-yard clepsydra, and related documents
29	Copies of 2 letters from John Combridge of Ilford, Essex, to Dr. A. W. Sleeswyk of Groningen, Holland, about the interpretation of Chinese texts for the reconstruction of the steelyard clepsydra
30	Letter from Dr. André W. Sleeswyk of Gronigen, Holland, about the design of his reconstruction of the Chinese steelyard clepsydra, and related documents
31	Letter from Prof. A. Rupert Hall of Imperial College of Science and Technology, London, about the publication of Dr. André W. Sleeswyk's paper 'The Celestial River: A Reconstruction' in 'History of Technology, 1978'
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