‎"SAURIN, JOSEPH.‎
‎Solution et Analyses de quelques Problêmes appatenans aux nouvelles Méthodes. (+) Solution Generale du Probleme, ou parmi une infinité de Courbes semblables décrites sur un Plan vertical, & aiant un même axe & un même point d'origine, il s'agit de...‎

‎(Paris, Jean Boudot, 1711). 4to. Without wrappers. Extracted from ""Mémoires de l'Academie des Sciences. Année 1709"". Pp. 26-35 a. 1 folded engraved plate. + pp. 257-266 a. 1 folded engraved plate.‎

Reference : 45235

‎First printing of two historical papers in the development of the diffrential calculus.""Saurin’s two papers (1709) on curves of quickest descent represent a solution of a problem first posed by Jakob I Bernoulli - to find which of the infinitely many cycloids linking a given point as origin to a given line is the curve of quickest descent from the point to the line - and then an extension of the problem to any family of similar curves. Saurin followed the differential methods of Johann I Bernoulli, although he studiously avoided taking a position in the brothers’famous quarrel.""(DSB).‎