EULER, LEONHARD. Methodus inveniendi Lineas Curvas maximi minimiue proprietate gaudentes... Lausanne & Geneva: M. M. Bousquet & Soc., 1744. Engraved title vignette and 5 engraved folding plates. 4to, contemporary vellum, staining to upper cover; some light browning, old library stamp on title. FIRST EDITION. Norman 731; Grolier/Horblit 28; Honeyman II, 1060-62; Dibner Heralds of Science 111.