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6 jan 1119 ano - The use of the Magnetic Compass.

Descrição:

These were the first reports of the Song Dynasty using a magnetic compass. The compass is different because it uses a smaller needle which is attached to a fixed stem. This is important when the Song travel in the Ocean.

Adicionado na linha do tempo:

Song Dynasty

ByAidan Steigelmann
29 jan 2018

Data:

6 jan 1119 ano
Agora
~ 905 years ago
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