Acoustics: an Edison phonograph with a carbon microphone. Coloured wood engraving after J.T. Balcomb.

    • Balcomb, J. T.
    Date:
    1878
    Reference:
    47037i
    Catalogue details

    Licence: Public Domain Mark

    Credit: Acoustics: an Edison phonograph with a carbon microphone. Coloured wood engraving after J.T. Balcomb. Wellcome Collection. Source: Wellcome Collection.

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