The Property of A GENTLEMAN
BACON, ROGER. Specula Mathematica. [With:] Perspectiva. Frankfurt: Wolffgang Richter 1614. [Parts 4 and 5 of the Opus Maius]. 2 vols. in one, 4to, 195 x 149mm. (7 11/16 x 5 7/8in.), an eighteenth- or nineteenth-century pasteboard binding covered with an earlier vellum fragment from an antiphonal, text slightly browned. EDITIONES PRINCIPES (Opus Maius was not published in its entirety until 1733), woodcut diagrams.

Details
BACON, ROGER. Specula Mathematica. [With:] Perspectiva. Frankfurt: Wolffgang Richter 1614. [Parts 4 and 5 of the Opus Maius]. 2 vols. in one, 4to, 195 x 149mm. (7 11/16 x 5 7/8in.), an eighteenth- or nineteenth-century pasteboard binding covered with an earlier vellum fragment from an antiphonal, text slightly browned. EDITIONES PRINCIPES (Opus Maius was not published in its entirety until 1733), woodcut diagrams.

"Part IV of the Opus maius is devoted to the usefulness of mathematics..." (Dictionary of Scientific Biography). Part V, Perspectiva is a treatise on optics. "Besides Grosseteste his main optical sources were Euclid, Ptolemy, al-Kindi, and Ibn al-Haytham (Alhazen). He followed Grosseteste in emphasizing the use of lenses not only for burning but for magnification, to aid natural vision." (Ibid.)

Provenance: Donaueschingen, Furstliche Hofbibliothek, ink stamp on first and last leaves.