Reconstruction of the ancient magnetic compass 
The original description is lost: neither size of the device, nor its location, nor time of manufacturing are estimated.
- https://www.whatchina.cn/four-ancient-inventions-in-ancient-china.html Four Ancient Inventions In Ancient China. by Jerry.P 2019-09-26 1.Invention magnetic needle China is recognized in the world as the country to invent the Compass. The invention of the compass is the result of the understanding of the magnetic properties of objects by the working people of ancient China in the long-term practice. Due to production labor, people came into contact with magnetite and began to understand the magnetic properties. People first discovered the nature of magnet attraction to iron, and later discovered the directionality of magnets. After many experiments and research, a practical compass was finally invented. The earliest compass was made of natural magnets, which shows that the ancient Chinese working people discovered natural magnets and their iron absorption very early. According to ancient records, during the Spring and Autumn Period and the Warring States Period, due to the great transformation period of the transition from slavery society to feudal society, the productive forces have developed greatly, especially the agricultural production is flourishing and developed, thus promoting the mining industry and smelting. The development of the industry. In the long-term production practice, people have known magnets from iron ore. The earliest compass was Sinan. ..
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|current||06:13, 25 September 2021||640 × 435 (221 KB)||T||Reconstruction of the ancient magnetic compass <ref> https://www.whatchina.cn/four-ancient-inventions-in-ancient-china.html Four Ancient Inventions In Ancient China. by Jerry.P 2019-09-26 1.Invention magnetic needle China is recognized in the world as...|
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