NEWTON, Sir Isaac (1642-1727). Opticks: or, a Treatise of the Reflections, Refractions, Inflections and Colours of Light. London: for William Innys, 1730. 8°. 12 folding engraved plates of diagrams (some light browning and spotting, minor defect at inner margin of title). Contemporary panelled calf (upper hinge cracked, new label on spine). Provenance: Eugene F. McCarthy (blackstamp on front paste-down). Fourth edition. Babson 136; Gray 178.