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Description
Six photographs depicting a roll of film with metallic canisters, possibly a lens or a television tube, and a ruler. Each photograph is signed on the reverse by de Forest and dated 1939.
Type
image
Format
Black & White
Identifier
018DD13D-A50C-4900-A53A-966240312440 2003-34-813
Subject
Sound motion pictures--History (LCSH) Television (LCSH) De Forest, Lee
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