Jonas, Ludwig one of the ablest German theologians of our day, was born at Neustadt a. O. February 11, 1797. During the Franco-Prussian war of 1812-1815 he fought against the foreign invader, but as soon as peace dawned on his native land he resumed his theological studies under the celebrated Schleiermacher, of whom he was one of the most prominent and faithful followers. After preaching at different places, he removed to Berlin in 1834, and soon secured a place in the foreground among Berlin's large array of theological writers. He published Schleiermacher's MSS.: his philosophical Essays and Dissertations in 1835, the Dialectic in 1839, Morals in 1843, Letters in 1858. He died Sept. 19, 1859. Jonas was one of the founders of the Monatsschrift of the United Church of Prussia (comprising the Reformed and Lutheran churches at that time. SEE PRUSSIA).