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He realized it might be possible to transmit speech over a wire by using electricity. He tried it and it worked.
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They worked on the telephone the whole summer. It finally worked
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Alexander Graham Bell got patent before him. Elisha Gray applied for a caveat . http://www.pbs.org/wgbh/amex/telephone/peopleevents/pande02.html
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In 1876, the telephone was born. He spoke with Watson on the other end. https://www.corp.att.com/attlabs/reputation/timeline/1876telephone.html
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Watson recorded the first words of the telephone. He spoke with Alexander Graham Bell on the other end
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Bell and Watson went to the tour of the Northeast. They successfully presentated their new invention. http://www.pbs.org/wgbh/amex/telephone/peopleevents/pande01.html
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He invented the carbon-button transmitter. Edison helped invent the telephone. http://www.pbs.org/wgbh/amex/telephone/peopleevents/pande03.html
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The telephone became a business. They all created AT&T.
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Elisha Gray and Alexander Graham Bell both designed devices that could transmit speech. Alexander Graham Bell patented his telephone before Elisha Gray. http://inventors.about.com/od/bstartinventors/a/telephone.html
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He was running the largest shipyard in america. His own company replaced him for another president. http://www.pbs.org/wgbh/amex/telephone/peopleevents/pande04.html