EULER ON GLASSES WITH THREE LENSES

EULER, [LEONHARD].

Recherches sur les lunettes a trois verres qui representent les objets renverses.

(Berlin, Haude et Spener, 1759). 4to. No wrappers as issued in "Memoires de l'Academie Royale des Sciences et Belles Lettres". tome X, pp. 323-372.

First printing of this paper in which Euler made important research into the field of optics and how to construct glasses with three lenses.
"Euler composed his object-glasses of two bi-convex lenses of crown-glas, and a bi-concave of flint, to form a triple object-glass of six lines focal distance with a large aperture; and it is because our microscope is achromatic that it is established on the principles of Euler." (Brewster. The Edinburgh journal of science. P. 225).

See Eneström E240.

Order-nr.: 44266