Jang Yeong-sil!
Jang Yeong-sil was a prominent Korean scientist and astronomer during the Joseon Dynasty (1392–1910). Although Jang was born as a peasant, King Sejong's (r. 1418–1450) new policy =O= PV PV E ܁x@ ?OJ PF)Z md+Hqof breaking class barriers placed on the national civil service allowed Jang to work at the royal palace. Jang's inventions, such as the Cheugugi (the rain gauge) and the water gauge, highlight the technological advancements of the Joseon Dynasty.
-
Sejong's first assignment to Jang was to build a celestial globe to measure astronomical objects. Books obtained from Arabian and Chinese schola ......
Celestial Globe -
Self-striking water clocks had already been invented by the Arabians and the Chinese (in 1091), and a more primitive form was in use by the Koreans.
WaterClock