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Friedrich Adolf
Trendelenburg
Universität Berlin (Philosophy Tree)

Hermann
Ulrici
University of Halle (Philosophy Tree)


George Sylvester
Morris
Johns Hopkins (Philosophy Tree)


Benjamin
Peirce
Harvard (MathTree)


Charles Sanders
Peirce
Johns Hopkins (Philosophy Tree)


Johann Kaspar
Bluntschli
Universität München (History of History Tree)

Karl
Knies
Heidelberg University (History of History Tree)


Herbert Baxter
Adams
Johns Hopkins (History of History Tree)




Henry Pickering
Bowditch
Harvard Medical School (Neurotree)

Wilhelm
Wundt
University of Leipzig




John
Dewey
Columbia


Georg Elias
Müller
Universität Göttingen

Wilhelm
Wundt
University of Leipzig


Oswald
Külpe
University of Wurzburg


Karl
Bühler
Vienna University


Jean-Martin
Charcot
Hôpital Salpêtrière, Paris (Neurotree)

Johann Bernhard Aloys
von Gudden
Ludwig-Maximilians-Universität München (Neurotree)


Eugen
Bleuler
Universität Zürich (Neurotree)





Albert
Ellis
(Options)

Paul
Eddy
Columbia (Neurotree)

Sheldon H.
Rifkin
University of Tennessee (Neurotree)

Albert EllisX