United States Communication: Samuel F.B. Morse found a way to send messages by an electric current. (21 янв 1837 г. – 5 авг 1837 г.)
Описание:
In the year 1837, Morse performed the first successful telegraph that was able to communicate through coded messages, which were then converted by an operator into corresponding letters of the alphabet.Добавлено на ленту времени:
Дата:
21 янв 1837 г.
5 авг 1837 г.
~ 6 months