File talk:PSM V78 D326 Ptolemy.png

From Wikimedia Commons, the free media repository

Jump to navigation Jump to search

The instrument seen was the subject of a Stack Exchange thread, see Mathematics Stack Exchange: What is Ptolemy holding in his picture on Wikipedia? /109.56.234.155 15:27, 23 June 2016 (UTC)[reply]

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File_talk:PSM_V78_D326_Ptolemy.png&oldid=199736799"