Hugo R.
Kruyt

Utrecht




Carl Ernst Heinrich
Schmidt

Kaiserliche Universität Dorpat


Arthur Joachim
von Oettingen

Kaiserliche Universität Dorpat (Meteorology Tree)


Wilhelm
Wundt

University of Leipzig (Neurotree)


Wilhelm Friedrich
Ostwald

Leipzig University


Carl Theodor
Liebermann

Technische Hochschule Berlin


Georg
Lunge

ETH Zürich


Ludwig
Knorr

University of Jena


Hans Hugo Christian
Bunte

Karlsruhe Institute of Technology


Fritz
Haber

Institute for Physical. Chemistry and Electrochemistry


?




Diederik Johannes
Korteweg

Amsterdam (MathTree)


Johan Antony
Barrau

Utrecht (MathTree)


Paul
Ehrenfest

Leiden (Physics Tree)


Dirk
Coster

RUG (Physics Tree)


Jan Albert
Prins

Delft University of Technology (Physics Tree)


Oskar
Piloty

University of Munich


Wilhelm
Schlenk

Vienna University, Berlin


Herman F.
Mark

Polytechnic University


Jan J.
Hermans

UNC Chapel Hill

Adrianus Bernardus
Ruigrok

Leiden
(Options)

Adrianus RuigrokX