"BOSCOVICH (BOSCOVIC), ROGER JOSEPH (RUDJER J.). - GEOMETRICAL OPTICS AND THE RAINBOW.
Reference : 45083
(1760)
(Paris, Imprimerie Royale, 1760). 4to. Extract from ""Mémoires de Mathematique et de Physique, Présentés à l'Academie des Sciences par divers Savans"", Tome III. Pp. 321-325. A faint dampstain to inner margins.
First apperance of Boskovic's paper in which he explains how light is refracted and reflected in droplets of water, creating the coloured rainbow - he discusses the sphericity in connection with both refraction and reflexion of light and he comments on Newton's optics.
(London, J. Nichols, 1778). 4to. Extracted from ""Philosophical Transactions"", Year 1777. Vol. 67 - Part II. Pp. 789-798.
First edition.