1 janv. 1809 - Samuel Soemmering Invents The Electric Telegraph
Description:
Samuel used 35 wires with gold electrodes in water to send a message. A telegraph message is sent and received by an operator and then delivered in written form as a telegram. They were used historically to record information quickly, signalled emergencies and to notify families of serious death or injury during war.Ajouté au bande de temps:
Date:
1 janv. 1809
Maintenaint
~ Il y a 216 ans