421. University of Pennsylvania, LJS 424 Title: Nonus Almansoris cum annotationibus Doctoris S? : varia alia opuscula. Author: Johannes Mellarinus Place: Bologna Date: 1500-1501.
422. University of Pennsylvania, LJS 429 Title: De philosophia naturali Place: Mainz Date: [between 1485 and 1499]
423. University of Pennsylvania, LJS 430 Title: Carmina de urinarum iudiciis et de pulsibus Author: Bartholomaeus de Montagna Place: France Date: [after 1500]
425. University of Pennsylvania, LJS 437 Title: Circa instans Author: Matthaeus Platearius Place: Germany Date: [1400?]
426. University of Pennsylvania, LJS 438 Title: Neoplatonic translations Author: Platonic Academy Place: Florence Date: [circa 1475]
427. University of Pennsylvania, Oversize LJS 449 Title: Medical texts Place: Germany Date: [circa 1446]
429. University of Pennsylvania, LJS 451 Title: Commentary on Doctrinale puerorum Place: France Date: [between 1279 and 1299]
430. University of Pennsylvania, LJS 452 Title: Ex quo vocabularii varii et autentici Place: Germany Date: [14--]