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 (Physics Tree)


Leonard Salomon
Ornstein

Utrecht (Physics Tree)


Felix Christian
Klein

Universität Göttingen (Physics Tree)


Max
Abraham

Universität Göttingen (Physics Tree)


Johannes
Stark

Universität Würzburg (Physics Tree)


Ludwig
Boltzmann

Vienna University (Physics Tree)


Vladimir Andreevich
Steklov

St Petersburg State University (Physics Tree)


Paul
Ehrenfest

Leiden (Physics Tree)


Marcel G.J.
Minnaert

Utrecht (Physics Tree)




Anton
Pannekoek

Amsterdam






David
Gill

Royal Observatory at Cape of Good Hope












Wilhelm Friedrich
Ostwald

Leipzig University (Chemistry Tree)


Hans Emil
Lau

Urania observatory, Copenhagen (Physics Tree)


Elis
Strömgren

Copenhagen University (Physics Tree)


Karl
Schwarzschild

Astrophysical Observatory Potsdam (Physics Tree)




Edward Emerson
Barnard

Lick Obsrvatory


Edward Singleton
Holden

Lick Observatory


William Wallace
Campbell

Lick Observatory


Robert Grant
Aitken

Lick Observatory


Gerard P.
Kuiper

University of Arizona



Walter Joseph
Jaffe

Leiden
(Options)

Walter Joseph JaffeX