Prestet, John,

a priest of the oratory, son of a Serjeant at Chalons-sur-Saone, was born in 1648. He went to Paris early in life, and, having finished his studies there, entered into the service of father Malebranche, who, finding he had a genius for the sciences, taught him mathematics, in which the young pupil made so rapid a progress, that, at the age of seventeen he published the first edition of his “Elemens de Mathematiques.” In the same year, 1675, he entered the congregation of the oratory, and taught mathematics with distinguished reputation, particularly at Angers. He died June 8, 1690, at Mechlin. The best edition of his “Elements,” is that of 1689, 2 vols. 4to. They contain many curious problems. 2