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Sonargraph, Boston Harbor tunnels (MA) - 1962
Named collection: Harold E. Edgerton Collection
Object type: color slide
Maker: Edgerton, Harold Eugene
Place made: United States
Date made: 1972-08
Materials: 35mm film; cardboard
Site location: Boston Harbor (MA)
Measurements: 2" x 2"
Sub-bottom sonargraph recording the location of the Sumner and Callahan tunnels under Boston Harbor, signed and dated July 14, 1962; black-and white reproduction. (CC)