(London: Printed for W. Innys, 1730). 208 x 126 mm. (8 1/8 x 5"). 4 p.l., 382 pp.,  leaf (ads). Fourth Edition, Corrected.
Contemporary panelled calf, raised bands, neatly rebacked preserving most of original backstrip, red morocco label. With 12 folding plates, as called for. Babson 136; PMM 172 (first edition); Norman 1588 (first edition); ESTC T69138. Boards with a few minor spots, extremities a little rubbed, leaves at beginning and end with mild offsetting from turn-in glue, occasional minor foxing, but an excellent copy, the text clean and fresh, with well-preserved plates, and in a solid binding.
The last edition of Newton's groundbreaking work to be revised by the author before his death, this version contains the complete set of 31 "Queries" exploring the nature of light and color. First published in 1704 with 16 queries, "Opticks" grew out of experiments begun while Newton was riding out the plague years 1665-66 in Lincolnshire, as well as from findings described in his early lecture series at Cambridge. It caused a sensation in England and on the Continent. PMM notes, "The core of his work was the observation that the spectrum of colours (formed when a ray of light shines through a glass prism) is stretched along its axis, together with his experimental proof that rays of different colours are refracted to different extents. This causes the stretching, or dispersion, of the spectrum. All previous philosophers and mathematicians had been sure that white light is pure and simple, regarding colours as modifications or qualifications of the white. Newton showed experimentally that the opposite is true." (CDT1717)
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PJP Catalog: CA19BF.073