Johann Wolfgang Goethe-Universität Frankfurt am Main
Department of Physics
Institute for the History of Science
Max-von-Laue-Str. 1
D - 60438 Frankfurt am Main
Germany

Tel. +49 (0) 69 798 28441

F.Linhard@em.uni-frankfurt.de

Clare Hall
Herschel Road
Cambridge CB3 9AL
England
fl231@cam.ac.uk