ПоәК 042-18-38-92/03-2013 №1 басылым

1. Magnetism was known to the early Greek philosophers. According, to one story

Magnets, a shepherd, when he was on Mt. Ida on island of Crete, was so strongly

attracted to the ground by the tip of his stick and the nails in his shoes that he had

difficulty in getting. away. | Upon digging into the ground to find the cause, he at

Stove Fed a stone with the most amazing properties of attracting iron. This stone is

now called lodestone or magnetite.
2. The idea that a loadstone can be used as a compass is a very old one. The evidence
that a piece of iron could be magnetized by a lodestone and used as a compass
appears to have been mentioned. as early as the beginning of the 12th century.
3. A compass as it is often made for demonstration purposes 'usually consists of a
straight steel needle which has been mag­netized and mounted free to turn on a sharp
pointed rod. In the early days of the mariner's compass, it was common to float
several small magnetic needles on water by mounting them on a block of wood or
other light material.