The telephone

After years of using the dot-and-dash forms of Morse code, Bell went on to use the utility of electricity to help invent the first telephone. With the help of Thomas Watson, Bell successfully used the harmonic telephone in June 1875. Alexander Graham Bell's notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, "Mr. Watson -- come here -- I want to see you." Utilizing voice through electricity in the harmonic telephone was the tip of the iceberg for Bell, the next step was creating a series of telephone lines where parties could connect to each other to use the telephone. In 1877, construction of the first regular telephone line from Boston to Somerville, Massachusetts was completed. By the end of 1880, there were 47,900 telephones in the United States. The following year telephone service between Boston and Providence had been established. http://inventors.about.com/od/bstartinventors/a/telephone.htm