Porter, Dot2023-05-232023-05-232015-06-042015-04-25https://repository.upenn.edu/handle/20.500.14332/46389http://hdl.library.upenn.edu/1017/d/medren/4759444Physics--Early works to 1800Physical sciences--Early works to 1800 FragmentsManuscripts Latin--13th centuryManuscripts Latin--14th centuryManuscripts MedievalFacsimile of LJS 252, Manuscript leaf from PhysicsBook