NOMOS. 63 



When this is done, the moveable conductor becomes 

 part of the circuit; and what is the consequence? 

 The consequence is twofold. In the first place, the 

 conductor oscillates backwards and forwards until 

 at last it rests in the magnetic meridian; in the 

 second place, the two ends exhibit the properties of 

 magnetic poles the end which points to the north 

 pole of the earth being attracted, that is to say, by 

 the marked pole of a magnet, and quasi-repelled by 

 the other pole ; and, conversely, the end which 

 points to the south pole of the earth being attracted 

 by the unmarked pole, and ^wasz-repelled by the 

 other pole. It is found also that the polar relations 

 of the ends of the helix change places if the direc- 

 tion of the current is changed, and that the helix 

 itself moves in an opposite direction to gain the 

 magnetic meridian. And, last of all, it is found that 

 a bar of iron or steel is rendered magnetic by being 

 placed within the core of the helix. In a word, it is 

 found that all the phenomena of magnetism may be 

 exhibited in a moveable spiral conductor during the 

 passage of a current. 



Now this fact which cannot be without impor- 

 tant bearings upon the theory of magnetism has 

 naturally given rise to the idea that electrical currents 

 circulate around every magnet in a direction which is 

 transverse to the line connecting the two poles. It 

 has naturally given rise to this idea, because the ends 

 of the moveable helix are certainly endowed with 

 the powers of magnetic poles, and because, as cer- 

 tainly, these powers are the consequence of the 



