(John Adolphus), a learned divine and historian, was born at Munster in 1680. After being a Jesuit for several years, he became a Calvinist at Cassel, in 1715; and soon after was made professor of philosophy and poetry, and in 1722 professor of history and eloquence, at Marburg, where he died in 1744. The most esteemed of his works are, 1. The state of the sciences at Hesse, in German. 2. His- toria Hessianica, 3 vols. 3. Praecepta eloquentiae rationa- lis, &c.

He ought not to be confounded with George Hart- man, a German mathematician, who, in 1540, wrote a book on perspective; nor with Wolfgang Hartman, who, in 1596, composed the Annals of Augsburg.