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37 tons of pulley
A man stands next to machinery used in the pulley system for the Joliet Railroad Bridge .
11.6 x 10 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 (March 8, 1931), p. 5