3 2 8 D O C . 2 0 8 S O U N D R E C O R D I N G insbesondere durch Bohr zu grosser Fruchtbarkeit sich entwickelt hat.[7] Den Rest meines Lebens werde ich wohl der grundsätzlichen Klärung dieses Problems wid- men, wie gering auch die Aussichten auf eine Erreichung dieses Zieles erscheinen mögen. A. Einstein ADS. Herneck 1966, p. 134. [123 667]. Also available as AuD (Deutsches Rundfunkarchiv C53, 62U2007). Einstein 2003, CD1, Track 2 (3 minutes and 25 seconds). In the top left corner, the man- uscript has “Autophon 56” in an unknown hand, the code under which the recording was cataloged in the records of the Institut für Lautforschung at the University of Berlin, which received the original recording from the Prussian State Library (see Herneck 1966, note 3). The manuscript also has Ein- stein’s birth date “geb. 14 März 1879” written in an unknown hand below his signature. In the bottom right corner of the verso it has the signature of Wilhelm Doegen and the date “Berlin d. 6.2.24.” [1]Dated by the date of the recording as per the records at the Deutsche Rundfunkarchiv and the date written at the bottom of the manuscript. The recording was done by Wilhelm Doegen, director of the Lautabteilung at the Prussian State Library and founder of its Lautarchiv. Doegen recalls the event in a typewritten memoir [123 669]. He mentions that Einstein was accompanied by his wife, and that Einstein was very interested in his work and, in particular, in their oscillograph. While they did not talk about politics, when Doegen mentioned that in his collection the recording of the Kaiser’s voice was stored right next to those of everyman, Einstein responded: “My political ideal is democ- racy! Everybody shall be respected as a person and no one shall be idolized!” (“Mein politisches Ideal ist die Demokratie! Jeder soll als Person respektiert und keiner vergöttert werden!”). When Doegen asked Einstein how he had found the idea of relativity (“wie sind Sie auf den Gedanken der Relativi- tätstheorie gekommen”), Einstein responded: “I just explained that into your apparatus” (“Das habe ich Ihnen soeben in den Apparat gesprochen”). Upon leaving, Einstein gave the manuscript of his recorded text to Doegen (see [123 669]). [2]The words “bezw. der Lorentzschen Theorie” are interlineated in the manuscript. [3]Einstein 1905r (Vol. 2, Doc. 23), Minkowski 1908. [4]For Einstein’s first formulation of the equivalence principle, see Einstein 1907j (Vol. 2, Doc. 47), §17. [5]See Einstein 1915i (Vol. 6, Doc. 25) [6]For similar statements about Einstein’s discovery of the theory of relativity, see Einstein 1921d (Vol. 7, Doc. 53) and Vol. 13, Doc. 399. For a historical account of the genesis of general relativity, see Renn 2007. [7]Wilhelm Wien (1864–1928) was Professor of Physics at the University of Munich Max Planck Niels Bohr.