452 Sir G. C. Haughton on the Common Nature of 



the other, on its taking up a position at right angles to the 

 same axis. Now it is not a little remarkable that platinum 

 and palladium, which he selects as magnetic, exhibit, it will 

 be seen, a lower state of attraction than cadmium, copper, 

 gold, mercury, and silver, and that these, in common with 

 antimony, bismuth, lead, tin, and zinc, in which he found re- 

 pulsion, all exhibit attraction, according to the present form 

 of experiment, and some in a very strong degree. 



The case of antimony and bismuth is deserving of atten- 

 tion, for by a method somewhat analogous to the present one, 

 the late M. Lebaillif found that they exhibited repulsion ; 

 though in iiis experiments the bodies were not forced into 

 contact, and therefore their occult properties were not elicited. 

 In these two instances, as is the case with all bodies of low 

 attractive power, the connexion was formed with some dif- 

 ficulty; but as it was repeated on many occasions at different 

 intervals of time, and even within a day of these remarks, not 

 the slightest doubt can exist on the point. But I shall have 

 to return to this subject again. 



Another fact resulting from the two modes of experimenting 

 employed by Dr. Faraday and myself, is that the connexion 

 could be formed on any side or end of the substance, and that 

 form had no influence upon the result. Indeed this was to be 

 expected, as the transverse position which the substances 

 assumed in his hands resulted from their shape, as every ob- 

 long body under repulsion must necessarily place itself at 

 right angles to the resultant of forces, with a facility propor- 

 tioned to its length and slenderness. Where the shape of 

 the substance examined would permit of it, the end has of 

 late always been selected in preference to the side, with a view 

 to ascertaining this point ; and this was particulai'ly the case 

 with the antimony and bismuth, which were in bar, and had 

 been cut across. 



I have introduced iodine into the class of metals and 

 metalloids, as its semi-metallic lustre seemed to justify it, and 

 because I found that it attracts the magnet of itself; but it 

 shows no polarity. All that is necessary is to hold a scale of 

 this body against the point of the magnetic needle, when, on 

 drawing it back, the needle will remain connected with it for 

 40° or 50° of the compass. A piece of arsenic too, which 

 showed very low magnetic intensity (15°), acquired a similar 

 power, but in a higher degree, after it had been for a short 

 lime in close juxtaposition with the end of a bar-magnet; but 

 it was remarkable that this power only appeared on the flat 

 side of the arsenic where it had pressed against the crucible 

 in which it was melted, the other broken parts of the sides 



