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9 sept. 1835 - Telegrafen

Description:

Det var amerikaneren Samuel Morse som fant opp telegrafen. Den fungerer ved å sende elektromagnetiske signaler over et ledningsnett. Man kunne ikke sende vanlige meldinger med tekst man måtte sende morsekode.

Ajouté au bande de temps:

Den industrielle revolusjon

ByIben Sørgjerd Lyng
29 oct. 2018
0
0
414

Date:

9 sept. 1835
Maintenaint
~ Il y a 190 ans

Les images:

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