This complete edition of Newton's optical papers contains two volumes: the first details his Optical Lectures, delivered at Cambridge University between 1670 and 1672, while the second documents the evolution of the Opticks, the most influential optical and experimental work of the eighteenth century. The Lectures is Newton's first major scientific treatise, and represents a crucial link between his early years of discovery and his mature publications. The complete text of both surviving versions of the Lectures, an early version and a vastly expanded revision, is included here, together with...