Felix
Plateau

Ghent University (Chemistry Tree)


Jean Jacques
Kickx

Ghent University (Chemistry Tree)


Julius
Mac Leod

Ghent University (Chemistry Tree)


Hendrik Antoon
Lorentz

Teylers Institute in Haarlem




Felix Christian
Klein

Universität Göttingen


Max
Abraham

Universität Göttingen


Johannes
Stark

Universität Würzburg


Ludwig
Boltzmann

Vienna University


Vladimir Andreevich
Steklov

St Petersburg State University








Anton
Pannekoek

Amsterdam




Jan
Woltjer

Leiden (Astronomy Tree)


David
Gill

Royal Observatory at Cape of Good Hope (Astronomy Tree)












Elis
Strömgren

Copenhagen University


Wilhelm Friedrich
Ostwald

Leipzig University (Chemistry Tree)


Hans Emil
Lau

Urania observatory, Copenhagen


Karl
Schwarzschild

Astrophysical Observatory Potsdam




Edward Emerson
Barnard

Lick Obsrvatory (Astronomy Tree)


Edward Singleton
Holden

Lick Observatory (Astronomy Tree)


William Wallace
Campbell

Lick Observatory


Robert Grant
Aitken

Lick Observatory (Astronomy Tree)


Gerard P.
Kuiper

University of Arizona



Johan A.M.
Bleeker

Utrecht
(Options)


Peter Gustaaf
Jonker

Radboud University Nijmegen (Astronomy Tree)


Marc
Klein Wolt

Radboud University Nijmegen (Astronomy Tree)

Elena
Gallo

University of Michigan

Gemma Henrieke
Janssen

Amsterdam (Astronomy Tree)



Johannes Joseph Marie
in 't Zand

Utrecht (Astronomy Tree)

Jacob Jacco
Vink

Utrecht (Astronomy Tree)

Alexandros
Chiotellis

Amsterdam (Astronomy Tree)

Johan BleekerX