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Charles Sanders
Peirce
Johns Hopkins (Philosophy Tree)

Jeffries
Wyman
Harvard (Neurotree)

Louis
Agassiz
Harvard (Marine Ecology Tree)


Rudolf Hermann
Lotze
Berlin (Neurotree)



Wilhelm
Wundt
University of Leipzig

Francis
Galton
Cambridge (Neurotree)


James McKeen
Cattell
Penn (Neurotree)


Edward L.
Thorndike
Columbia (Neurotree)


Herbert A.
Toops
Ohio State

Harold A.
Edgerton
Ohio State
(Options)

Edward S.
Bordin
University of Michigan (Neurotree)

Edward
Lichtenstein
University of Oregon (Neurotree)

Harold EdgertonX