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Richard B. Goldschmidt at microscope.
Calvin Bridges.
Ivan Petrovich Pavlov, standing outside, arms crossed.
T. H. Morgan in lab.
Thomas Hunt Morgan and Rollis Adams Emerson, 3/4 length portrait.
Ralph Lillie and unidentified man, standing, full-length portrait, informal.
Just, standing outside.
Jim Neel and Al Miller standing outdoors with car in background.
Lillie and unidentified man, standing outside building.
Herman Muller with unidentified group of scientists.
Thomas Hunt Morgan to Otto L. Mohr, 1923 March 1
Symposium: Virus Paleontology, Disease and Evolution. Part III: Can Persisting Viruses Drive Human Evolution?