Copenhagen, spring 1932. People on the picture from left to right:

• Heisenberg, Werner Karl;
• Hein, Piet;
• Bohr, N.;
• Brillouin, Leon Nicolas;
• Rosenfeld, Leon;
• Delbrück, Max;
• Heitler, Walter;
• Meitner, Lise;
• Ehrenfest, Paul;
• Bloch, Felix;
• Waller, Ivar;
• Solomon, Jacques;
• Fues, Erwin;
• Strømgren, Bengt;
• Kronig, Ralph de Laer;
• Gjelsvik, A;
• Steensholt, Gunnar;
• Kramers, Hendrik Anton;
• Weizsäcker, Carl Friedrich von;
• Ambrosen, J.P.;
• Beck, Guido;
• Nielsen, Harald Herborg;
• Buch-Andersen;
• Kalckar, Fritz;
• Nielsen, Jens Rud;
• Fowler, Ralph Howard;
• Hyllerås, Egil Andersen;
• Lam, Ingeborg;
• Rindal, Eva;
• Dirac, Paul Adrian Maurice;
• N.N.;
• Darwin, Charles Galton;
• Manneback, Charles;
• Lund, Gelius