The Mathematical Treatise in Nine Sections is a mathematical text written by Chinese Southern Song dynasty mathematician Qin Jiushao in the year 1247. The mathematical text has a wide range of topics
Mathematical Treatise in Nine Sections in the Complete Library of the Four Treasuries
1842 wood block printed Shu Shu Jiu Zhang
surveying a round city from afar. Shu Shu Jiu Zhang
Qin Jiushao solved third order equation with rod calculus
Snow gauge
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A snow gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of solid precipitation over a set period of time.
A snow gauge
