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* Paul J. Gans, [http://scholar.chem.nyu.edu/tekpages/compass.html The Medieval Technology Pages: Compass] | * Paul J. Gans, [http://scholar.chem.nyu.edu/tekpages/compass.html The Medieval Technology Pages: Compass] | ||
* The Tides By Sir William Thomson (Lord Kelvin) | * The Tides By Sir William Thomson (Lord Kelvin) | ||
* Evening Lecture To The British Association At The Southampton Meeting on Friday, August 25, 1882 [http://zapatopi.net/kelvin/papers/the_tides.html]. Refers to compass correction by | * Evening Lecture To The British Association At The Southampton Meeting on Friday, August 25, 1882 [http://zapatopi.net/kelvin/papers/the_tides.html]. Refers to compass correction by Fourier series. | ||
* Arrick Robots. Robotics.com Example implementation for digital solid-state compass. ''[http://www.robotics.com/arobot/compass.html ARobot Digital Compass App Note]'' | * Arrick Robots. Robotics.com Example implementation for digital solid-state compass. ''[http://www.robotics.com/arobot/compass.html ARobot Digital Compass App Note]'' | ||
* Petra G. Schmidl ''[http://www.uib.no/jais/v001ht/schmidl1.htm Two Early Arabic Sources on the Magnetic Compass]'' | * Petra G. Schmidl ''[http://www.uib.no/jais/v001ht/schmidl1.htm Two Early Arabic Sources on the Magnetic Compass]'' |