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

Needham/NRI2/2/4/4 contains:
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23	Copy of a letter from Joseph Needham to Derek J. de Solla Price of Yale University, U.S.A., about the study of equipment at the Korean Roayl Observatory
24	Copy of a letter from Joseph Needham to Francis Maddison of the Museum of the History of Science, Oxford, inviting him to collaborate on a work on the instruments at the Korean Royal Observatory
25	Copy of a letter from Joseph Needham to Gari Ledyard, asking for his help to obtain photographs of the Yi dynasty astronomical clock preserved in the National Museum, Seoul, South Korea, and related notes
26	Part of a letter from Francis Maddison of the Museum of the History of Science, Oxford, accompanying a copy of a letter he wrote to Silvio Bedini of Washington D. C. , U.S.A., about work on the history of clockwork in Korea
27	Letter from Denis Twitchett of the School of Oriental and African Studies, London, about the translation of relevant papers
28	Letter from Gari Ledyard in Seoul, Korea, about the Korean Yi dynasty armillary clock and the work of Chon Sangun
29	Copies of three letters from Joseph Needham to Korean scholars, thanking them for their help in enabling photographs to be taken of the 'son-gi okhyong' armillary clock at Koryo University Museum, Seoul, Korea
30	Correspondence with Gari Ledyard in Seoul, Korea, about his examination of the 'son-gi okhyong' armillary clock at Koryo University Museum, Seoul, Korea
31	Letter from John Combridge of Ilford, Essex, about his preparations for a talk on the 'Seoul Armillary Clock' to be given at the Science Museum, London
32	Two letters from Francis Maddison of the Museum of the History of Science, Oxford, about work by John Combridge on the 'Korean clock'
33	Letter from John Combridge of Ilford, Essex, about his work on Korean clockwork and accompanying copies of correspondence with Gari Ledyard of Columbia University, New York, U.S.A., about his assistance with the work
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