čokoľvek neuspokojivý strelný prach magnetic needle invention Pritúliť sa ostrý exil
computersmiths - History of Chinese Invention - Invention of the Magnetic Compass
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Why was the earliest magnetic compass used for geomancy in ancient China invented? What prompted them to create a compass for divination? - Quora
MAGNETIC COMPASS NAVIGATION INSTRUMENTS HISTORY HOLY GOLDEN
Magnetic compass | Description, History, & Facts | Britannica
THE COMPASS An Important Chinese Invention. It is a device for determining direction. The simplest form of the compass is a magnetized needle mounted. - ppt download
History Lesson: The Magnetic Compass - IEEE Spectrum
History of Magnetic Compass - Invention of Magnetic Compass
The Invention of the Compass | Cal International
Lasting Legacies of Ancient China – Ancient Chinese Exhibit
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