London: H. Murray, 1795. Half Leather. First Edition. First English Edition. lxiii, vi, 515, viii, xxviii, 520 pp. 8vo. 6 plates in Volume I, 14 plates in Volume II. Brown leather spines with gold incised bands, dark brown leather patch title with gold embossed titling. Marbled paper boards with faux-vellume corners. Clean within, light foxing to both text and plates. Very Good.
At the invitation of King Frederick the Great of Prussia, Leonhard Euler (1707–1783) tutored the Princess of Anhalt-Dessau, the king's niece. Over the next several years, Euler wrote more than 200 letters to her on a broad range of subjects relating to physics and mathematics, as well as offering insights into Euler's personality and religious beliefs.