Bible Encyclopedias
Microphone
The Nuttall Encyclopedia
An instrument invented in 1878 by Professor Hughes, and consisting of charcoal tempered in mercury, which intensifies and renders audible the faintest possible sound.
Copyright Statement
Public Domain.
Bibliography Information
Wood, James, ed. Entry for 'Microphone'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/m/microphone.html. Frederick Warne & Co Ltd. London. 1900.