90 Faraday on New Electro-Magnet ical Motions, 



With a helix the phenomena were interesting, because ac- 

 cording to the view given of the attractions and repulsions, that 

 is of the motions toward and from the ends, some conclusions 

 should follow, that if found to be true in fact, and to hold also 

 with magnets, would go far to prove the identity of the 

 two. Thus the end which seems to attract a certain pole on 

 the outside, ought to repel it as it were on the inside, and that 

 which seems to repel it on the outside, ought to appear to 

 attract it on the inside ; i. e., that as the motions on the inside 

 and outside are in different directions for the same pole, it 

 would move in the one case to and in the other case from the 

 same gnd of the helix. Some phenomena of this kind have 

 been described in explaining figs. 8, II, 12, and 13 ; others are 

 as follows. 



A helix of silked copper wire was made round a glass tube, 

 the tube being about an inch in diameter ; the helix was about 

 three inches long. A magnetic needle nearly as long was floated 

 with cork, so as to move about in water with the slightest 

 impulse ; the helix being connected with the apparatus and 

 put into the water in which the needle lay, its ends ap- 

 peared to attract and repel the poles of the needle according 

 to the laws before-mentioned. But, if that end which at- 

 tracted one of the poles of the needle was brought near that 

 pole, it entered the glass tube, but did not stop just within side 

 in the neighbourhood of this pole (as we may call it for the 

 moment) of the helix, but passed up the tube, drawing the 

 whole needle in, and went to the opposite pole of the helix, 

 or the one which on the outside would have repelled it. On 

 trying the other pole of the magnet with its corresponding end 

 or pole of the helix the same effect took place ; the needle- 

 pole entered the tube and passed to the other end, taking the 

 whole needle into the same position it was in before. 



Thus each end of the helix seemed to attract and repel 

 both poles of the needle : but this is only a natural consequence 

 from the circulating motion before experimentally demonstrated, 

 and each pole would have gone through the helix and round 

 on the outside, but for the counteraction of the opposite pole. 



