when were compasses invented

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Early Chinese Compass – 400 BC - MagLab A history of the magnetic compass – BHP Who Invented the Compass | Who Guides Science Source - Compass, Song Dynasty Who Invented the Compass? - Who Invented It Compass Rose History Who Invented the Magnetic Compass The South Pointing Spoon | Hakai Magazine How Does a Compass Work - Universe Today 10 Interesting Facts About Compasses In what country was the compass Compass - Wikipedia The Compass – Contemporary Silk Road Four Inventions of Ancient China: Paper Compass | navigational instrument Magnetic Compass Was Invented In How Compass is made? - How Compass Works? History of the compass - Wikipedia 1st century AD. The magnetic compass In what country was the compass When was the first compass invented and Inventions - Qin Dynasty The Ancient Chinese Compass Invention Invention Of The Magnetic Compass Galileo's compass - History of an invention Who invented the magnetic compass Magnetic Compass - WH 15 SEM 1 Medieval Compass - Wikipedia Surprising Ancient Chinese Inventions COMPASS An Important Chinese Invention History of the compass - Wikipedia How Compass is made? - Compass Construction Who Invented the Magnetic Compass History of Compass - Invention of the

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