Diskussion:Edward A. Calahan

The Gold and Stock Telegraph Co. incorporated in August with offices at 18 New Street, New York, promotes the first stock ticker, adapted from a printing telegraph invented by Edward Callahan. The clacking ticker will be installed next year on the New York Stock Exchange, will initially serve only brokers on that exchange, but will soon be used on other exchanges throughout the country, printing stock quotes on strips of paper and eliminating the need to have runners carry quotes from one office to another (see Western Union, 1871).