Essai d'optique sur la gradation de la lumiere.
Paris: Claude Jombert, 1729. First edition of the founding work of photometry. “[Bouguer’s] interest in the measurement of light dates from about 1721, when J. J. d’Ortous de Mairan proposed a problem that necessitated a knowledge of the relative amount of light from the sun at two altitudes. Bouguer succeeded..... More