ANGO, PIERRE, S.J. L'Optique divisee en Trois Livres o— l'on demon- tre d'une maniere aisee tout ce qui regarde 1ø. La Propagation & les Proprietez de la Lumiere. 2ø. La Vision. 3ø. La Figure & la Disposition des Verres qui servent a la

ANGO, PIERRE, S.J. L'Optique divisee en Trois Livres o— l'on demon- tre d'une maniere aisee tout ce qui regarde 1ø. La Propagation & les Proprietez de la Lumiere. 2ø. La Vision. 3ø. La Figure & la Disposition des Verres qui servent a la perfectionner. Woodcut plate;numerous diagrams in text. [8], 367 [i. e., 363], [5] pages, including 2 leaves of errata at end. 12mo, contemporary sheep gilt, rubbed, spine ends chipped; scattered marginal foxing. Paris: EtienneMichallet, 1682 E800-1200 FIRST EDITION. "Ango's treatise is of significance to the history of optics because it established the outline of a wave theory of light nearly eight years in advance of Huygens's Traite de la lumiere. Both Ango and Huygens acknowledged making use of an unpublished manuscript by the Jesuit scientist IgnaceGaston Pardies (1636- 1673) which may have suggested a wave theory based on optical experiments with reflected and refracted rays"- Becker 19.