An instrument for registering the vibrations of a sounding body.

Phonautograph

An instrument for registering the vibrations of a sounding body.

A form of the phonautograph invented by Thomas A. Edison, by mean which sounds are made to produce on a register permanent tracings, each having an individual character corresponding to the sound it produces.

Phonograph

A form of the phonautograph invented by Thomas A. Edison, by mean which sounds are made to produce on…