One of Alexander Graham Bell's early 'telephones' was the Liquid Transmitter. It was fashioned much in the manner of the liquid transmitter from Elisha Gray's patent caveat, filed on February 14, 1876, the same day that Bell filed his patent. It was on March 10 that the famous first words "Mr. Watson--- come here---I want to see you" were spoke over a 'telephone.' Those words were spoken into a liquid transmitter. For more information on the liquid transmitter and a photo of a working model, please visit the page on early instruments.