TELEGRAPH (1830-1840) (1 янв 1830 г. – 1 янв 1840 г.)
Описание:
Telegraph is a system of communication in this era. It is a long distance transmission of textual messages where the sender uses symbolic codes to the receiver. It creates signal by making and breaking electrical connectionsДобавлено на ленту времени:
Дата:
1 янв 1830 г.
1 янв 1840 г.
~ 10 years
