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feb 18, 1809 - Электрохимический телеграф

Description:

В 1809 году немецкий учёный Самуил Томас Земмеринг построил и испытал электрохимический телеграф на пузырьках газа.

Added to timeline:

Таймлайн истории развития телеграфа

ByАлександра

1 Nov 2018

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512

Date:

feb 18, 1809

Now

~ 217 years ago

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