AUGUSTO GÓMEZ SERRANO - SANTAFÉ DE BOGOTÁ (Colombia)
In the century I SAW B.C., she was discovered (for a shepherd according to bill the legend) that certain mineral class attracted to the iron. As it was found near the city of Magnesia, in smaller Asia, called himself stone of Magnesia, and the phenomenon was denominated magnetism. This was studied for the first time for Such of Mileto.
Later on she was discovered that if an iron fragment or steel was rubbed with the magnetic mineral (imam), it was magnetized (magnetized). The Spanish term of imam comes from a Latin word that means "hard stone."
She was also discovered that if it was allowed to a magnetic needle to rotate freely, it would always point out the south north address. It is ignored how the discovery took place, but the Chinese were the first ones in noticing of that property. He/she refers this way in Chinese books that date of the century II.
The Chinese were never served as the imam to establish the direction in the sailing. The Arab could learn of them that phenomenon, and perhaps some crusaders learned it in turn of the Arab arriving this way in Europe.
In 1180, the English sage Alexander Neckam (1157-1217) the first European that made reference to that capacity of the magnetism to point out the address was. With the time the magnetic needle was placed on a marked card with several addresses, the needle could move freely in lathe of the card.
To the device was given the name of Compass, word that derives of another Latin that means box. In the seafaring terminology to the compass you the flame compass (that comes of a French word that means to rotate).
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