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._] BELL SYSTEM STATISTICS Dec. 31, 1920 Dec. 31, 1925 Dec. 31, 1930 Dec. 31, 1935 Dec. 31, 1938