Babcock, Harold Delos

* January 24, 1882 – April 08, 1968 †

United States

James Hopwood Jeans
Jeans, James Hopwood

* September 11, 1877 – September 16, 1946 †

United Kingdom

Ritchey, George Willis

* December 31, 1864 – November 04, 1945 †

United States

Seares, Frederick Hanley

* May 17, 1873 – July 20, 1964 †

United States