(Berlin, Haude et Spener, 1758). 4to. No wrappers as issued in "Mémoires de l'Academie Royale des Sciences et Belles-Lettres" Tome 12 (1756), pp. 300-321 a. 1 folded engraved plate.
First edition. Euler looks at singular integrals of differential equations (derivation through differentiation; proof that these integrals are not included in the general solution.)
Enestroem: 236. - Also with Euler le Fils: "Des Cerfs - Volans", pp. 322-364 a. 1 plate.
Order-nr.: 49129