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GENERAL SCIENCE 



when in the field of a magnet, the earth itself must be 

 a magnet with an N pole and an S pole. Since the lines 

 of force passing from one magnetic pole of the earth to 

 the other are so weak, their effect on the compass is 

 easily overcome by the strong field around a bar magnet. 



MAGNETIC MERIDIANS 

 Showing lines of equal declination. 



And yet the earth's lines of force are strong enough to 

 move the needle of the compass in a north and south 

 direction when no other magnet is near. 



The magnetic poles of the earth are not exactly at the 

 geographical north and south poles. The magnetic north 

 pole of the earth is more than 1000 miles away from the 

 actual pole, being in latitude 70 5' north, and longitude 

 96 46' west. It was located in 1831 by Mr. Ross. It is 

 just within the Arctic Circle in Boothia Felix. The south 

 magnetic pole of the earth has never been located. Be- 

 cause of the irregularities in the distribution of the magnet- 

 ism, there seem to be two south magnetic polar regions. 



