Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hedwig Kohn (April 5, 1887 1964), was a pioneer in physics and one of only three women who obtained Habilitation (the qualification for university teaching in Germany) in physics before World War II. She and the other two physicists, Lise Meitner and Hertha Sponer, were forced to leave Germany during the Nazi regime. Born in Breslau, Province of Silesia, Kohn was the daughter of Georg Kohn (1850 1932), a wholesale merchant of fine cloth, and Helene Hancke (1859 1926), a member of a well-to-do Breslau family.