Acoustics: a carbon microphone invented by D.E. Hughes. Wood engraving by Baud after Broux.

  • Broux.
Reference:
47038i
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About this work

Publication/Creation

[Paris]

Physical description

1 print : wood engraving

Lettering

Le microphone de Hughes.

Reference

Wellcome Collection 47038i

Type/Technique

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    Closed stores

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