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6 ene 1119 año - The use of the Magnetic Compass.

Descripción:

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.

Añadido al timeline:

Song Dynasty

ByAidan Steigelmann
29 ene 2018

fecha:

6 ene 1119 año
Ahora mismo
~ 905 years ago
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