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Current results range from 1928 to 1935

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Bank of wires, a cylinder and an electric bulb, possibly part of a Wirephoto switchboard or power unit, Los Angeles, 1935

Technician manipulating a component on a Wirephoto machine with photographic print wrapped around its cylinder, Los Angeles, 1935

Wirephoto switchboard and transmitting machine, Los Angeles, 1935

Oscillograph for photographing electrons, California Institute of Technology, Pasadena, 1928