Tianchi basin

Tianchi basins were meteorological measuring instruments used to gather and measure the amount of liquid precipitation over a period of time during the Song Dynasty. The instrument was devised by the Song Chinese mathematician and inventor Qin Jiushao in 1247.[1][2]

  1. ^ Strangeways, Ian (2011). Precipitation: Theory, Measurement and Distribution. Cambridge University Press (published April 14, 2011). p. 140. ISBN 978-0521172929.
  2. ^ Selin, Helaine (2008). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd ed.). Springer (published April 16, 2008). p. 736. ISBN 978-1402045592.