PLANCK, plânk, HEINRICH LUDWIG: German Lutheran; son of the preceding; b. at Göttingen July 19, 1785; d. there Sept. 23, 1831. He was educated at the university of his native city (1803-06), where he became lecturer in 1806. Four years later he was appointed associate professor of theology in the same institution, and in 1823 was promoted to a full professorship. He devoted himself particularly to New-Testament exegesis, and long labored on a lexicon of the Greek Testament, which he did not live to complete. Among his writings special mention should be made of the following: Bemerkungen über I Timotheus (Göttingen, 1808; in answer to Schleiermacher's attack on the authenticity of the epistle); Entwurf einer neuen synoptischen Zusammenstellung der drei ersten Evangelien nach Grundsätzen der höherer Kritik (1809); De vera natura atque indole orationis Grœcœ Novi Testamenti (1810; Eng. transl. by A. S. Paterson, Edinburgh, 1833); and Abriss der philosophischen Religionslehre (Göttingen, 1821).