“Through the history of the various filaments employed by the first experimenters and the union of Swan and Edison to the metallic filament gas-filled lamps, showing the methods of manufacture. By the courtesy of the General Electric Co.”
“Through the history of the various filaments employed by the first experimenters and the union of Swan and Edison to the metallic filament gas-filled lamps, showing the methods of manufacture. By the courtesy of the General Electric Co.”
Record created by Richard Crangle. Last updated 28 April 2023
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