Keywords: Yuan Dynasty - waterwheels and smelting.png This medieval printed illustration depicts waterwheels powering the bellows of a blast furnace in creating cast iron This illustration is taken from the 14th century treatise Nong Shu written by Wang Zhen in 1313 AD during the Chinese Yuan Dynasty http //www waterhistory org/histories/waterwheels/ 1313 AD Wang Zhen PD-old Cast iron Paintings of the Yuan Dynasty Drawings of China History of metallurgy technologies Blast furnaces in China Science and technology in China Wang Zhen official |