5ta Solvay Conference – Bruselas 23-29/octubre (1927)

Back row: A Piccard, E Henriot, P Ehrenfest, Ed Herzen, Th De Donder, E Schroedinger, E Verschaffelt, W Pauli, W Heisenberg, R H Fowler, L Brillouin.

Middle Row: P Debye, M Knudsen, W L Bragg, H A Kramers, P A M Dirac, A H Compton, L de Broglie, M Born, N Bohr.

Front Row: I Langmuir, M Planck, Mme Curie, H A Lorentz, A Einstein, P Langevin, Ch E Guye, C T R Wilson, O W Richardson