Those interested in Chinese astronomy and sundials around 1280 might wish to consult:
Nathan Sivin, Granting the Seasons: The Chinese Astronomical Reform of 1280, With a Study of Its Many Dimensions and a Translation of its Records (2009) http://www.springer.com/mathematics/history+of+mathematics/book/978-0-387-78955-2 I highly recommend this work. Sara Sara J. Schechner, Ph.D. David P. Wheatland Curator of the Collection of Historical Scientific Instruments Department of the History of Science, Harvard University Science Center 251c, 1 Oxford Street, Cambridge, MA 02138 Tel: 617-496-9542 | Fax: 617-496-5932 | [email protected] http://www.fas.harvard.edu/~hsdept/chsi.html
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