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AAS 221 -compass - Compass A Chinese Invention James...

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Compass: A Chinese Invention James Matthew Lopresti Xin Ting Zheng Luwen Jiao Yi Hao Leong Edwin Monday, March 15, 2010
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3 Origins of the Compass Navigation prior to the first compass was extremely primitive and involved using sightings of landmarks and other resources to find bearings and location. There are beliefs that some sort of geomagnetic device was created as early as 1400 to 1000 B.C. Discovered by a man named John Carlson, this device may have used the same basic principles as our modern day compasses. Nobody knows for sure when the first MODERN compass was invented, because of its long and unclear history. However, it is believed that the first fully functional Modern compass was created in China during the Qin Dynasty (221-206 B.C.) Monday, March 15, 2010
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4 Understanding the Compass The first compass used magnetic minerals to make the polarization work. These minerals are known as lodestones – which are composed of iron oxide, which allows the needle in the compass to align in the North-South direction. By the 6 th century A.D, these lodestones were replaced by the needle, which is used in many basic compasses today. Monday, March 15, 2010
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5 Understanding the Compass Seafarers would often use resources such as the sun to find direction. This was an unreliable and inaccurate tool because of the different sun patterns and overcast weather throughout the course of the year. The first recordings of a compass-like device being used in Europe was around the year 1190, which proves that the Chinese beat all of the European countries in discovering the modern, and improved compass.
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