 Max Planck (Physics Tree) |  |
 Ivan Mikhaylovich Sechenov University of St. Petersburg
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 Wilhelm Wundt University of Leipzig
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 Friedrich Goltz University of Strasbourg
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 David Ferrier National Hospital, Queen Square, London
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 Lórand Eötvös University of Budapest
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 Arthur Gordon Webster Clark University (Physics Tree)
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 Henry A Rowland Johns Hopkins
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 Albert Abraham Michelson Chicago
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 Joseph Sweetman Ames Johns Hopkins
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