Mitau, Leipzig, Hinz, 1774.
Three volumes 8vo (199x112 mm), viii-336 pages and 1 folding plate / viii-352 pages and 3 folding plates (some booklets inverted) / xiv-(2)-446 pages and 8 folding plates. binding : Early XIXth century full sheep, gilt flat spines. Upper joint of vol. 3 split. Paper browned.
references: DSB [IV, 471 : "The famous Lettres à une princesse d'Allemagne sur divers sujets de physique et de philosophie, which originated in lessons given by Euler to a relative of the Prussian king, was not published until Euler's return to St. Petersburg. Written in an absorbing and popular manner, the book was an unusual success and ran to twelve editions in the original french [...]"], Eneström [344].
Price : 400 €