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Acoustics: an Edison phonograph with a carbon microphone. Coloured wood engraving after J.T. Balcomb.
- Balcomb, J. T.
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About this work
1 print : wood engraving, with watercolour
The phonograph and microphone. Apparatus used in the discovery of the microphone. (See page 114.)
Wellcome Library no. 47037i
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Location Status AccessClosed stores Open Online request