A sketch of opticks [electronic resource] : displaying the wonders of sight and manner of vision: The Cartesian and Newtonian Theories of Light: Ideas of a newly created Man: The Astonishing Appearances produced by plane Looking Glasses; Concave and Convex Mirrours, and Multiplying Glasses: The different refrangibility of the Rays of Light, and the Nature of Colours: The amazing burning Property of Lenticular Glasses, and reflecting Mirrours: With a Description of the Mirrour, whereby Archimedes burnt the Roman Fleet: A beautiful Aerial Scene described and accounted for: The Construction of Miscroscopes: Demonstrations of the Equality of the Angles of Incidence and Reflection, by easy Experiments. Remarks on Mr. Finny's Demonstration, &c. Wherein Some Mistakes of his are corrected, particularly his Misconception of Doctor Berkley's Definition of Tangible Objects and their Representatives. By John Donovan, P. M. Topographer, Practical Land-Surveyor & Diallist. Price---A British Sixpence.