Christopher DeCou 10/7/26 Christopher DeCou 10/7/26

A Few Notes on Astronomical Instruments in the Yuan Dynasty

Christopher DeCou 9/25/26 Christopher DeCou 9/25/26

You want to be a merchant in late Ming China. But from where do you get your abacus?

Christopher DeCou 9/15/25 Christopher DeCou 9/15/25

Xu Chaojun’s celestial maps are a colorful view of the heavens and an overlooked source in the history of numeracy.

Christopher DeCou 8/31/25 Christopher DeCou 8/31/25

Christopher DeCou 8/21/25 Christopher DeCou 8/21/25