Carlyle Ferdinand Jacobsen, Stanley Smith Stevens, Ernest Ropiequet Hilgard, and Don Marquis, at an American Psychological Association Conference
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left to right: Carlyle Ferdinand Jacobsen (1902-1974), Professor of Psychology, Yale University; Stanley Smith Stevens (1906-1973), Professor of Psychology, Harvard University; Ernest Ropiequet Hilgard (1904-2001), hypnosis expert and Professor of Psychology, Stanford University; and Don Marquis, Professor of Psychology, University of Michigan. The photograph was taken April 1937 at a meeting of American Psychological Association.
Smithsonian Institution Archives, Accession 90-105, Science Service Records, Image No. SIA2008-4341
Smithsonian Institution Archives Capital Gallery, Suite 3000, MRC 507; 600 Maryland Avenue, SW; Washington, DC 20024-2520
SIA Acc. 90-105 [SIA2008-4341]
Gelatin silver prints