TERRESTRIAL MAGNETISM, ETC. 239 



not very much different from the true north and 

 south line (unless the experiment be made far 

 north in North America, or far south in the 

 Antarctic regions). If turned out of this position 

 and left to itself again and again, it will turn again 

 and again into the same position, and always with 

 the eye and point similarly situated as to north 

 and south. Suppose, for example, the eye turns 

 to the north and the point to the south. Remove 

 the needle again, and go through the same opera- 

 tion as before, several times running. Replace it 

 in its floater, and it will be found to turn decidedly 

 faster into the north and south line than before. 

 Again take out the needle and go through the 

 same operation, only with the other end of the bar 

 magnet from that first employed. Replace it on 

 its floater. You will now find it turning much less 

 rapidly into its former position, or possibly turning 

 into the reverse position. Take it out, and repeat 

 several times the last operation, with the bar 

 magnet. After having done this a sufficient 

 number of times, you will find the needle turning 

 its point to the north and its eye to the south. Or 



