Lorenz OKEN (1 August 1779 - 11 August 1851) naturalist;botanist;biologist;German ornithologist and philosopher;founder of the magazine "Isis" and of the "Society of German Natural Scientists and Physicians". Professor of medicine and philosophy;professor of natural history at the Universities of G鰐tingen and Jena;in 1832 he was forced to leave Germany due to his political views;moved to Switzerland;where he was professor of philosophy and rector of the University of Zurich. Engraving by Moritz Steinla (21 August 1791 - 21 September 1858) from a painting by Jakob Wilhelm Christian (1775 - 1831). Germany;nineteenth century