To 250-Anniversary of the publication of Euler's Textbook in Physics "Lettres a une Princesse d'Allemagne" (1768-1772)

Leonhard Euler (1707-1783) is the famous and outstanding scientist and mathematician of XVIII century. His legacy numberes about 1000 publications. Euler liked educational activity and we outline his Textbook in Physics "Letters a une Princesse d' Allemagne" written in French in Berlin and published in St.Petersburg already after his return to Russia in 1768-1772 done in 3 volumes. Our report is dedicated to 250-th Anniversary of this Textbook publication, to the history of its creation, to its translations to many languages and especially to Russian done in 2002 by outstanding Soviet and Russian historian of Science Nina Ivanovna Nevskaya.