(Berlin, Haude et Spener, 1768) 4to. No wrappers, as issued in ""Mémoires de l'Academie Royale des Sciences et Belles-Lettres"", tome XXII, Année 1766. Pp. 119-170 , pp. 171-201 and 2 folded engraved plates., pp. 202-212 and 1 folded engraved plate.
First printing of three importent Euler-papers on the construction of composite lenses in order to avoid confusion. Euler presents the mathematical theory to explain the effects. The third paper describe how to analyze refraction phenomena in glasses by way of prisms. - Eneström E 359, E 360, E 361.
(Berlin, Haude et Spener, 1768). 4to. No wrappers, as issued in ""Mémoires de l'Academie Royale des Sciences et Belles-Lettres"", tome XXII, Année 1766. Pp. 119-170 , pp. 171-201 and 2 folded engraved plates., pp. 202-212 and 1 folded engraved plate. With the section title-page to ""Classe Mathématique"".
First printing of three importent Euler-papers on the construction of composite lenses in order to avoid confusion. Euler presents the mathematical theory to explain the effects. The third paper describe how to analyze refraction phenomena in glasses by way of prisms. - Eneström E 359, E 360, E 361.
(Berlin, Haude et Spener, 1769) 4to. No wrappers, as issued in ""Mémoires de l'Academie Royale des Sciences et Belles-Lettres"", tome XVIII, Année 1762. Pp. 195-225 and 1 folded engraved plate. + Pp. 226-248.
First printing of two importent Euler-papers on the mathematical theory of dioptrics, and how to avoid the confusions of lenses. - Eneström E 379 a. 380.