Gilbert N.
Lewis

UC Berkeley


Niels
Bohr

Copenhagen University (Physics Tree)




John Simpson
Lewis

University of Arizona




Wander Johannes
de Haas

Leiden (Physics Tree)


Jan Hendrik
Oort

Leiden (Physics Tree)


Paul
Ehrenfest

Leiden (Physics Tree)


Harlow
Shapley

Harvard (Physics Tree)


Harry Hemley
Plaskett

Oxford (Astronomy Tree)


Pieter Johannes
van Rhijn

RUG (Physics Tree)


Bart J.
Bok

University of Arizona (Physics Tree)


Armin Otto
Leuschner

UC Berkeley (Physics Tree)


Frederick
Leonard

UCLA (Physics Tree)


Ernst
Öpik

University of Tartu (Astronomy Tree)


Fred Lawrence
Whipple

Harvard (Physics Tree)


Gilbert N.
Lewis

UC Berkeley


Niels
Bohr

Copenhagen University (Physics Tree)




Bertram
Donn

University of Maryland


Joe
Nuth

NASA Goddard Space Flight Center

Natasha
Johnson

Washington University
(Options)

Natasha JohnsonX