Karl Eduard Zetzsche
Karl Eduard Zetzsche (March 11, 1830, in Altenberg – April 18, 1894, in Dresden) was a German mathematician and physicist. Biography. He studied in Dresden and Vienna, and in 1856 entered the Austrian telegraph service. In 1858, he became a teacher in the industrial high school at Chemnitz and, in 1876, a professor of telegraphy in the Polytechnic Institute at Dresden. In 1880, he was appointed telegraph engineer in the Imperial Post Office at Berlin. In 1887, he retired from public service.