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15. Jang Yeong-sil – History And Principles Of Time Measurement, Part 1
0.0Apr 14, 2014
The Baron proposes a show dedicated to time. So he invites a specialist from medieval Korea: Jang Yeong-sil. When the King's guards slept and did not ring the bells indicating different times of the day, the King asked Jang to create a machine that told time automatically. But how did Jang do it?