3 GO FRAGMENTS OF SCIENCE. 



Hence you see that, although there is no tendency of 

 the particle n to move towards the magnetic equator, 

 there is a tendency on its part to move parallel to the 

 magnet. If, instead of a particle of north magnetism, 

 we placed a particle of south magnetism opposite to 

 the magnetic equator, it would evidently be urged 

 along the line n q; and if, instead of two separate 

 particles of magnetism, we place a little magnetic 

 needle, containing both north and south magnetism, 

 opposite the magnetic equator, its south pole being 

 urged along n q, and its north along n p, the little 

 needle will be compelled to set itself parallel to the 

 magnet s N. Make the experiment, and satisfy your- 

 selves that this is a true deduction. 



Substitute for your magnetic needle a bit of iron 

 wire, devoid of permanent magnetism, and it will set 

 itself exactly as the needle does. Acted upon by the 

 magnet, the wire, as you know, becomes a magnet and 

 behaves as such; it will turn its north pole towards p, 

 and south pole towards q, just like the needle. 



But supposing you shift the position of your parti- 

 cle of north magnetism, and bring it nearer to one end 



FIG. 12. 



S I* "I N 



of your magnet than to the other; the forces acting 

 on the particle are no longer equal; the nearest pole of 

 the magnet will act more powerfully on the particle 

 than the more distant one. Let s TS, fig. 12, be the 

 magnet, and n the particle of north magnetism, in its 



