CASTEL, Louis-Bertrand (1668-1757). L'Optique des Couleurs, Paris: Briasson, 1740, 12° (159 x 94mm.), FIRST EDITION IN BOOK FORM, 2 engraved plates (modern annotations in ink to circa 14 leaves, small marginal staining to last few leaves, a few marginal tears), contemporary vellum, manuscript title to spine, sprinkled edges. [Dawson 1238: "of particular interest in connection with Newton, although it is not cited in Gray or the Babson catalogue"]