41. University of Pennsylvania, Oversize LJS 478 Title: Kitāb fī istīʻāb al-wujūh al-mumkinah fī ṣanʻat al-asṭurlāb Author: Al-Biruni Date: A.H. 625 (1228)
42. University of Pennsylvania, Oversize LJS 47 Title: De institutione musica Author: Boethius Place: France Date: 1490
43. University of Pennsylvania, LJS 487 Title: Treatises on astronomical instruments Place: France Date: [between 1500 and 1599]
44. University of Pennsylvania, LJS 488 Title: Summa de arithmetica, geometria, proportioni et proportionalità Author: Luca Pacioli Place: Venice Date: [after 1494]
46. University of Pennsylvania, LJS 494 Title: Sphaera mundi Author: Johannes de Sacrobosco Place: Italy Date: [between 1425 and 1450]
47. University of Pennsylvania, Oversize LJS 496 Title: Treatise on practical mathematical calculation Place: Italy Date: [between 1475 and 1499]
48. University of Pennsylvania, LJS 497 Title: Canones vel operationes in operando quadrante Place: Italy Date: [circa 1502]
49. University of Pennsylvania, LJS 498 Title: Tsurat ha-arets Author: Abraham bar Hiyya Place: Graz Date: [1542-1599?]
50. University of Pennsylvania, LJS 499 Title: Igeret orḥot ʻolam Author: Abraham ben Mordecai Farissol Place: Italy Date: [after 1525]