 While employed teaching physics at the University of Florence, Giovanni Caselli devoted much time to research into the telegraphic transmission of images.The major problem of the time was to get perfect synchronization between the transmitting and receiving parts so they would work together correctly.Caselli developed an electrochemical technology with a "synchronizing apparatus" (regulating clock) to make the sending and receiving mechanisms work together that was far superior to any technology Bain or Bakewell had.