夢溪筆談, Volume 17-21

by Kuo Shen

"夢溪筆談, Volume 17-21" by Kuo Shen is an encyclopedic work published in 1088 during China's Song dynasty. Written during the author's forced retirement, this remarkable compilation spans diverse fields including medicine, mathematics, astronomy, technology, and natural science. The work documents groundbreaking observations—from magnetic compass navigation to movable type printing, fossil discoveries to unidentified flying objects. Shen Kuo's polymathic curiosity illuminates medieval Chinese knowledge, capturing both systematic scientific inquiry and strange phenomena that challenged contemporary understanding of the natural world.