1. University of Pennsylvania, LJS 191 Title: Commentary on the Ephemerides of Regiomontanus Author: Bartholomäus Mariensüss Date: 1496
2. University of Pennsylvania, LJS 26 Title: Algorismus Author: Johannes de Sacrobosco Place: Italy Date: [between 1225 and 1275]
5. University of Pennsylvania, LJS 225 Title: Litterarum simulationis liber Author: Michele Zopello Place: Rome Date: [between 1455 and 1458]
6. University of Pennsylvania, Oversize LJS 24 Title: Medical miscellany Author: Isaac Israeli ben Solomon Place: Paris Date: [between 1225 and 1275]
7. University of Pennsylvania, LJS 232 Title: Trattato delle proportioni et proportionalità Author: Benedetto Varchi Date: 1539
8. University of Pennsylvania, LJS 216 Title: Sphaera mundi Author: Johannes de Sacrobosco Place: Paris Date: [between 1256 and 1270]
10. University of Pennsylvania, LJS 194 Title: Geometry Author: Sylvester II Place: Austria Date: [between 1125 and 1175]
11. University of Pennsylvania, LJS 267 Title: De ludo schacchorum seu de moribus hominum et officiis nobilium ... etc Date: 1409
12. University of Pennsylvania, LJS 198 Title: De simplicibus Author: Arnaldus de Villa Nova Place: Spain Date: [between 1350 and 1380]
15. University of Pennsylvania, Oversize LJS 254 Title: Buch von den probierten Kü̈̈nsten Author: Franz Helm Date: 1562
17. University of Pennsylvania, LJS 289 Title: Algorismus Place: Italy Date: [between 1450 and 1475?]
18. University of Pennsylvania, LJS 293 Author: Abu Bakr al-Hassar Place: Baghdad Date: A.H. 590 (1194)
19. University of Pennsylvania, LJS 295 Author: Safi al-Din al-Urmawi Place: Iran Date: A.H. 815 (1412)
20. University of Pennsylvania, LJS 296 Author: Yaḥyá ibn Aḥmad Kāshānī Place: Isfahan Date: A.H. 720 (1320)