Who was the assistant that worked with Bell on the harmonic telegraph?

Answer

Thomas Watson

Thomas Watson collaborated closely with Bell during the developmental phase of the harmonic telegraph. Their partnership was instrumental in the experiments that eventually led to the 1876 breakthrough, where they successfully transitioned from perfecting musical tone transmission to transmitting recognizable speech.

Who was the assistant that worked with Bell on the harmonic telegraph?
inventionAlexander Graham BellinventorMotivation