The most useful way of preaching. [electronic resource] : A letter to a friend. Written in German by the late Reverend and Celebrated Dr. Augustus Hermannus Franck, Professor of Divinity in the University of Hall, Saxony. Translated into Latin by Order of his Son, and out of the Latin into English by David Jennings. To which is prefixed an Historical Account of the almost miraculous Work of Professor Franck's building and establishing the Orphan House at Glaucha in the Suburbs of Hall.