https://www.facebook.com/carlthepianist The forerunner of the telephone was the telegraph. By 1870 all major towns in Europe and America had telegraphs, sending messages in 'on' and 'off' pulses (e.g. Morse code). It was while trying to improve the telegraph that Bell discovered the telephone. Accompanying Sheet: http://www.secretlifeofmachines.com/images/telephone.gif Please see http://www.secretlifeofmachines.com/ for more information Thanks to Tim Hunkin the creator for allowing these excellent videos to be freely distributed on-line. Category: