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*''Born: [[78]]''
*''Died: [[139]]''
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.
{{stub}}
==References==
*Conrad Schirokauer, et al, ''A Brief History of Chinese and Japanese Civilizations'', Fourth Edition, Cengage Learning (2012), 60.
[[Category:Scholars and Philosophers]]
[[Category:Yayoi Period]]
*''Died: [[139]]''
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.
{{stub}}
==References==
*Conrad Schirokauer, et al, ''A Brief History of Chinese and Japanese Civilizations'', Fourth Edition, Cengage Learning (2012), 60.
[[Category:Scholars and Philosophers]]
[[Category:Yayoi Period]]
