Felix Christian
Klein

Universität Göttingen (Physics Tree)


Johannes Franz
Hartmann

Kuffner-Sternwarte


Richard
Schorr

University of Hamburg


Walter
Baade

Mount Wilson Observatory




Bart J.
Bok

University of Arizona




George
Wallerstein

University of Washington


Max
Born

Edinburgh (Physics Tree)


Niels
Bohr

Copenhagen University (Physics Tree)


Ralph H.
Fowler

Cambridge (Physics Tree)


Edward Arthur
Milne

Oxford (MathTree)






Peter S.
Conti

CU Boulder

Philip
Massey

Caltech
(Options)

Kathryn F
Neugent

University of Washington

Philip MasseyX