Difference between revisions of "Zhang Heng"
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Latest revision as of 22:12, 18 January 2015
Zhang Heng was a Han Dynasty mathematician and scientist, famous for calculating the rough value of pi, and inventing the grid system for mapmaking, as well as a seismograph effective at detecting earthquakes even far from the capital.
References
- Conrad Schirokauer, et al, A Brief History of Chinese and Japanese Civilizations, Fourth Edition, Cengage Learning (2012), 60.
