https://archives.library.unimelb.edu.au/nodes/view/190375
Volvelles | University of Melbourne Archives
Scope Note: Diagrams with movable discs, circles, or pointers bearing graduated or figured information that are rotated for the purpose of determining...
university of melbournearchives
https://www.library.upenn.edu/events/coffee-codex-astronomical-0
Coffee with a Codex: Astronomical Volvelles | Penn Libraries
An informal lunch or coffee time to meet virtually with Kislak curators and talk about one of the manuscripts from Penn's collections. Each week we'll feature...
coffee withcodexastronomicalpennlibraries