?


George E.
Hale

Yerkes Observatory
?


Edward Singleton
Holden

Lick Observatory

William Hammond
Wright

Lick Observatory
(Options)

Paul Willard
Merrill

Mount Wilson Observatory


Olin Chaddock
Wilson

Mount Wilson Observatory

Nicholas Ulrich
Mayall

Lick Observatory

Horace Welcome
Babcock

Mount Wilson Observatory

Albert Gray
Mowbray

San Jose State

Hyron
Spinrad

UC Berkeley

John Henry Barrows
Irwin

Indiana University

William WrightX