In Vinegia: Per Giovanmaria Bonelli, 1552. Both Instrumento della filosofia and La prima parte de la filosofia natural were published in 1551 in Rome. La seconda parte de la filosofia naturale was first published in 1564 in Rome. The first editions are exceedingly rare: OCLC notes only one copy of the first edition of Instrumento della filosofia, at Sachsiche Landesbibliothek in Dresden. Of the 1551-4 edition of La filosofia naturale, it lists four copies. The present editions are also rare. Woodcut publisher's device on title-page, woodcut historiated initial letters. Bound together in contemporary limp vellum with author and title in manuscript on spine. Covers partially browned, with tears at head of spine. Some dampstaining at lower margin through the first several gatherings of the first work; the first work also contains contemporary marginal underscoring, and a few contemporary marginal notes. A good, appealing copy. [Together with:] Piccolomini, Alessandro. La prima [La seconda] parte de la filosofia naturale…In Vinegi: per Giovanni Bonello, 1552-65. Small octavo. 187, [1 blank] leaves; , 431 pages. Woodcut title-page device on first title-page, smaller, different woodcut device on second title; historiated initial letters, woodcut geometrical and occasionally astronomical diagrams in text. Small octavo. 155,  blank leaves. Item #15665
Alessandro Piccolomini (15089-1579) was a Siena-born Italian humanist who translated some of the classics into Italian, including Ovid's Metamorphoses, part of Vergil's Aeneid, and Aristotle's Poetics and Rhetoric. While a student at the University of Padua, he helped found the Infiammati Academy, where he gave lectures in philosophy. Thomas in his Universal Pronouncing Dictionary of Biography (1872) calls him "the first who wrote on philosophy in the Italian language." We haven't been able to find corroboration for this in a more recent source, but these works clearly constitute some of the earliest philosophy written in Italian. In astronomy, Piccolomini is well known for his De la sfera del mondo (1559), the appendix (De la stele fisse) of which represents the first printed star atlas. He also wrote, at the behest of Cosimo de Medici, a proposal for reforming the calendar (1578). In 1574 Pope Gregory XIII appointed him titular bishop of Patras (Patrae).
Riccardi II, 272.