James Craig
Watson

University of Michigan


John M.
Schaeberle

Lick Observatory


William Wallace
Campbell

Lick Observatory


Robert Grant
Aitken

Lick Observatory


Hermann
von Helmholtz

Physikalisch-Technische Reichsanstalt (Neurotree)


Henry A.
Rowland

Johns Hopkins (Physics Tree)


August Adolph Eduard Eberhard
Kundt

Universität Berlin (Physics Tree)


Heinrich
Rubens

Universität Berlin (Physics Tree)


Robert Williams
Wood

Johns Hopkins (Physics Tree)


James Craig
Watson

University of Michigan


John M.
Schaeberle

Lick Observatory


William Wallace
Campbell

Lick Observatory


Joseph Haines
Moore

UC Berkeley

Arthur Bambridge
Wyse

Lick Observatory
(Options)

Arthur WyseX