Returning home to Brantford after six months abroad, Bell continued his experiments with his "harmonic telegraph".[N 12] The basic concept behind his device was that messages could be sent through a single wire if each message was transmitted at a different pitch, but work on both the transmitter and receiver was needed.
Returning home to Brantford after six months abroad , Bell continued his experiments with his " harmonic telegraph".[N 12 ] The basic concept behind his device was that messages could be sent through a single wire if each message was transmitted at a different pitch , but work on both the transmitter and receiver was needed .
Bell needed to fix both the transmitter and what?
Bell needed to fix both the transmitter and what ?
receiver
receiver