HAHN OTTO: (1879-1968) German Chemist, Nobel Prize winner for Chemistry, 1944. Hahn is considered the father of nuclear chemistry. A vintage signed 4 x 6 colour postcard, the image depicting a botanical plant and with a printed calligraphic quotation in German. Signed in bold blue fountain pen ink by Hahn to a clear area at the base and dated Gottingen, 1964 in his hand. Together with an autograph envelope signed by Hahn, addressed in his hand to Miss Clara Lieber at Butler Hall, 119th Street, New York City, also providing an alternative address at West Washington Street in Indianapolis, signed (‘Prof. Otto Hahn’) by Hahn in fountain pen ink to the verso. Although not bearing any post marks, the envelope most likely dates from the time when Hahn was interned at Farm Hall in England, 1945-46. Some tears to the right edge of the envelope, where originally opened, otherwise VG, 2

Clara Lieber (1902-1982) American Chemist and student of Hahn.