发表于 2010-11-30 16:30 IP属地：未知
The earliest Chinese literature reference to magnetism lies in the 4th century BC writings of Wang Xu (鬼谷子): "The lodestone attracts iron."[10] The book also notes that the people of the state of Zheng always knew their position by means of a "south-pointer"; some author suggest that this refers to early use of the compass, but it more likely corresponds to the south pointing chariot
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