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Pathfinders of the new universe
Four scientific geniuses: Robert A. Millikan, Albert Einstein, Albert A. Michelson, and William Wallace Campbell.
18.7 x 20.8 cm
- still image
- These materials are either in the public domain, according to U.S. copyright law, or permission has been obtained from rights owners. The digital version and supplementary materials are available for all educational uses worldwide.
- The Janet A. Ginsburg Chicago Tribune Image Collection
- Chicago Sunday Tribune (January 25, 1931), p. 3
- Acme Newspictures (New York, N.Y.)
- Pacific and Atlantic Photos, Inc.