 On September 8, 1888, Smith published a short note entitled "Some Possible Forms of the Phonograph" in the British journal "Electrical World", where he suggested (probably for the first time) the use of permanent magnetic impressions for the recording of sound.Smith suggested using cotton or silk thread, into which steel dust or short clippings of fine wire could be suspended.These particles were to be magnetized in accordance with the alternating current from a microphone source.