JOHN FREDERIC, a very learned critic, was born at Hamburgh in 1613; and having travelled through Germany, Italy, and France, was made professor of polite learning at Deventer, and afterwards at Leyden, where he died in 1671. He published, 1. Diatribe in Statii, &c. 2. De sefertitie. 3. Correct editions of Seneca, Statius, T. Livy, Pliny's Natural History, Tacitus, Aulus Gellius, Phaedrus's Gronovius Fables, &c. with notes; and other works.

JAMES, son of the preceding, and a very learned man, was educated first at Leyden, then went over to England, where he visited the universities, consulted the curious MSS. and formed an acquaintance with several learned men. He was chosen by the grand duke to be professor at Pisa, with a considerable stipend. He returned into Holland, after he had resided two years in Tuscany, and consulted the MSS. in the Medicean library. In 1679, he was invited by the curators of the university to a professorship; and his inaugural dissertation was so highly approved of, that the curators added 400 florins to his stipend, and this augmentation continued to his death in 1716. He refused several honourable and advantageous offers. His principal works are, The Treasure of Greek Antiquities, in 13 vols. folio; and a great number of dissertations and editions of ancient authors. He was compared to Schioppus for the virulence of his style; and the severity with which he treated other great men who differed from him, exposed him to just censure.