Asia 1072



guo xi, spring



the song dynasty chinese polymath scientist , statesman shen kuo appointed head official bureau of astronomy, begins groundbreaking work colleague wei pu on accurately plotting orbital paths of stars, planets, , moon 3 times night, continuum of 5 years.
shen kuo sent supervise chancellor wang anshi s program of surveying building of silt deposits in bian canal, outside capital city of kaifeng. using original technique, shen dredges canal , demonstrates formidable value of silt gathered fertilizer.






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