1892 Service opened between New York and Chicago, 900 miles.
1902 First long-distance underground cable in use, 10 miles—New
York to Newark.
1915 First conversation from coast to coast, 3,650 miles—Boston to
San Francisco.
1921 Opening of deep sea cable, 115 miles—Key West, Fla., to
Havana, Cuba.
1927 Transatlantic telephone service opened between New York and
London, 3,500 miles.
First public demonstration of television by wire and radio.
1929 Ship-to-shore telephone service established.
1931 Teletypewriter exchange service inaugurated.
1935 First telephone call around the world.
1937 Connections possible to 93% of world’s telephones.
1938 Direct radio telephone circuit established between San
Francisco and Australia.
[Illustration: _The map shows areas served generally by the
principal telephone subsidiaries of the American Telephone and
Telegraph Company; also areas served by The Southern New England
Telephone Company and The Cincinnati and Suburban Bell Telephone
Company, which companies are not controlled but have license
contract arrangements with the American Company. Other telephone
companies also operate in nearly all of these areas and have
connecting arrangements with Bell System companies._]