granular microphone in glass tube, 1878-1890

PART OF:: four granular microphones, 1878-1890

Made:: 1878-1890 in England

maker:: David Edward Hughes

Granular microphone in glass tube, probably made by David Edward Hughes, England, 1878-1890

Details

Category:: Telecommunications

Object Number:: 1922-224/2

Materials:: glass, metal (unknown), wax and carbon

type:: microphone

credit:: Executors of the late Anna C. Hughes

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