The New International Encyclopædia/Zetzsche, Karl Eduard

ZETZSCHE, tsĕch'she, Karl Eduard (1830-94). A German mathematician and physicist, born in Altenburg. He studied in Dresden and Vienna, and in 1856 entered the Austrian telegraph service. In 1858 he became teacher in the industrial high-school at Chemnitz, and in 1876 professor of telegraphy in the Polytechnic Institute at Dresden. In 1880 he was appointed telegraph-engineer in the Imperial Post-office at Berlin, and in 1887 retired from public service. He wrote: Die Kopiertelegraphen, Typendrucktelegraphen und die Doppeltelegraphie (1865); Die elektrischen Telegraphen (1860); Katechismus der elektrischen Telegraphie (6th ed., 1883); Abriss der Geschichte der elektrischen Telegraphie (1874); Die Entwickelung der antomatischen Telegraphie (1875); Handbuch der elektrischen Telegraphie (together with Frölich, Henneberg, and Kohlfürst) (1877-1895). Consult: Voretzsch, Zur Erinnerung an K. E. Zetzsche (Altenburg, 1894).