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

Needham/NRI2/2/4/4 contains:
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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
34	Typescript chapter on astronomy from Jeon Sang-Woon's 'Introduction to the History of Science in Korea'
35	Photocopy of a paper by Jeon Sang-Woon entitled 'On the Astronomical Instruments of Three Kingdoms and Unified Silla', ('Komunhwa')
36	Photocopy of a paper by Jeon Sang-Woon [Chon Sangun] entitled 'On a Yi Dynasty Clockwork Armillary Sphere', («?????», Japan)
37	Correspondence with John S. Major of Dartmouth College, Hanover, New Hampshire, U.S.A., about Herbert Chatley's translation of chapter 3 of the «???» [Huai Nan Tzu / Huai Nan Zi]
38	Correspondence with Francis Maddison of the Museum of the History of Science, Oxford, about the publication of 'Hall of Heavenly Records' by Massachusetts Institute of Technology Press
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