Hugo R.
Kruyt

Utrecht




Wilhelm Friedrich
Ostwald

Leipzig University


?




Johan Antony
Barrau

Utrecht (MathTree)


Dirk
Coster

RUG (Physics Tree)


Jan Albert
Prins

Delft University of Technology (Physics Tree)


Wilhelm
Schlenk

Vienna University, Berlin


Herman F.
Mark

Polytechnic University


Jan J.
Hermans

UNC Chapel Hill


Joan H.
van der Waals

Shell Labs, Leiden

Wiebren Sjoerd
Veeman

University Duisburg-Essen
(Options)

Wiebren VeemanX