The discovery of current by Volta in 1800 and the electro- magnet in 1824, led to the invention of the magnetic telegraph. This is Cooke and Wheatstone's 5-needle machine.
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Details
Creative#:
TOP23657295
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
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