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einstein physicist conference solvay black-and-white auguste piccard émile henriot paul honour proof heart of édouard théophile de donder erwin schrödinger jules émile verschaffelt wolfgang pauli werner heisenberg ralph howard fowler léon brillouin peter debye martin knudsen william lawrence bragg hendrik anthony kramers paul dirac arthur compton louis de broglie max born niels drilling irving langmuir max planck marie skłodowska curie hendrik lorentz albert einstein paul langevin charles eugène guye charles thomson rees wilson owen willans richardson