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China:  Chinese Technology and Science--Star Observation Platform at Dengfeng, Yuan Dynasty 1276 A.D.  Constructed by a famous astronomer, Guo Shoujing.  Stone scale extending north to measure altitude of sun.
China: Chinese Technology and Science--Star Observation Platform at Dengfeng, Yuan Dynasty 1276 A.D. Constructed by a famous astronomer, Guo Shoujing. Stone scale extending north to measure altitude of sun.
Filename: ChinaWC962.jpg
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