(Berlin, Haude et Spener, 1758). 4to. No wrappers as issued in ""Memoires de l'Academie Royale des Sciences et Belles Lettres"". tome XI, 1756 pp. 235-266 and 1 folded engraved plate. Clean and fine.
Reference : 48838
First edition. In this memoir Euler records different experiments and their mathematical treatment with light refraction in liquids to follow up his own wave theory of light-refractions already put forward in 1746. - Enestrom: 234.
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