Raymond Thayer Birge was an American physicist.
Birge in 1954
Harold Clayton Urey was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 for the discovery of deuterium. He played a significant role in the development of the atom bomb, as well as contributing to theories on the development of organic life from non-living matter.
Urey in 1934
The S-1 Executive Committee at Bohemian Grove, September 13, 1942. From left to right are Urey, Ernest O. Lawrence, James B. Conant, Lyman J. Briggs, Eger V. Murphree, and Arthur H. Compton.