Institute International de Physique Solvay,
Leopold Park,
Brussels, Belgium.
(1st row left to right)
Irving Langmuir, Max Planck, Marie Sklodowska-Curie, Hendrik
A. Lorentz, Albert Einstein, Paul Langevin, Charles-Egene Guye, Charles Thomson
Rees Wilson, Owen Willians Richardson
(2nd row left to right)
Peter Debye, Martin Knudsen, Willian Lawrence Bragg, Hendrik
Anthony Kramers, Paul A.M. Dirac, Arthur H. Compton, Louis 7th duc de Broglie,
Max Born, Niels Bohr;
(3rd row left to right)
Auguste Piccard, Emile Henriot, Paul Ehrenfest, Edouard
Herzen, Theophile de Donder, Erwin Schrödinger, Jules Emile Verschaffelt,
Wolfgang Pauli, Werner Heisenberg, R.H. Fowler, Leon Brillouin;
