‎BOUGUER (P.)‎
‎Traité d'optique sur la gradation de la lumière - Ouvrage posthume de M. BOUGUER et publié par M. L'ABBE DE LA CAILLE -- EDITION ORIGINALE -- BON EXEMPLAIRE GRAND DE MARGES‎

‎P., Guérin, 1760, un volume grand in 4 (20,5 cm x 26 cm), relié en pleine basane, dos orné de fers dorés (reliure de l'époque), (un mors très légèrement fendu, un coin émoussé, quelques rousseurs), 18pp., (1), 368pp., 7 PLANCHES dépliantes‎

Reference : 763

‎---- EDITION ORIGINALE ---- BON EXEMPLAIRE GRAND DE MARGES et SUR PAPIER FORT ---- "... Just before he died, Bouguer completed a much larger book on photometry, the Traité d'optique sur la gradation de la lumière, published posthumously (1760) by his friend the Abbé Nicolas Louis de La Caille. The Traité goes far beyond the Essai, describing a number of ingenious kinds of photometers, including a method of goniophotometry, and even attempting an elaborate theory of the reflection of light from rough surfaces... It is fair to consider Pierre Bouguer not only the inventor of the photometer but also the founder of an important branch of atmospheric optics. The eighteenth century is not an outstanding epoch in the history of optics, but Bouguer's contribution to that science is notable by any standard". (DSB II pp. 343/344) ---- Norman N° 286 - Honeyman N° 447**763/ARM3+762/ARM5‎