During a convention of Electrotecnicians in 1920, he introduced the Termenvoksa or Heterophone, or Theremin, as it was known as internationally. People at the conference observed a small box with two antennae, just one on the appropriate and 1 within the remaining. Could it's a completely new sort of telegraph? https://rylanjcmhe.bligblogging.com/39101943/pallet-gates-no-further-a-mystery