(Berlin, Haude et Spener, 1769). 4to. No wrappers, as issued in "Mémoires de l'Academie Royale des Sciences et Belles Lettres", Année 1767, tome XXIII, pp. 131-164 a. 1 engraved plate.
First printing, dealing with compound lenses for making telescopes and the mathematical theory.
Enestroem: E 383.
Order-nr.: 49807