Porter, Dot2023-05-232023-05-232015-01-302015-04-25https://repository.upenn.edu/handle/20.500.14332/46406http://hdl.library.upenn.edu/1017/d/medren/4915187Astronomy--Early works to 1800Quadrants (Astronomical instruments)--Early works to 1800 CodicesDiagramsPen-and-wash drawingsTables (documents)TreatisesManuscripts Latin--16th centuryManuscripts RenaissanceFacsimile of LJS 497, Canones vel operationes in operando quadranteBook