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Keywords: Niels Bohr Albert Einstein3 by Ehrenfest.jpg Niels Bohr and Albert Einstein Foto by Paul Ehrenfest 1880-1933 <br> The picture was taken at Ehrenfest's home in Leiden the occasion was most likely the 50th anniversary of Hendrik Lorentz' doctorate December 11 1925 source http //www dfi dk/dfi/pressroom/kbhfortolkningen/ and other sites as well PD-old Albert Einstein 192512 Niels Bohr 192512 Photos by Paul Ehrenfest 192512 |