between Metallic Masses having different Temperatures. 445 



The analogy is exceedingly striking, more especially when it is 

 stated that each arrangement has been compiled alone solely 

 upon the evidence of experiment, and the ground upon which 

 each metal has its place assigned to it, is fully stated in the paper 

 alluded to for the two first columns, and in the present paper 

 for the third. It is also worthy of remark, that the same metals 

 seem to be most allied to one another in each of the three series. 

 The various observers agree in treating of their respective sub- 

 jects, that gold, silver, and copper are nearly allied in all : and 

 it is probable that platinum and iron are in equally close con- 

 nection*. The observations on all three points are at one in pro- 

 ving that there is a decided breach of continuity between lead 

 and antimony, so marked is the change of property of the two 

 lowest metals in the list. 



36. We may now venture to enunciate a third and most im- 

 portant law of these phenomena ; That the vibrations take place 



his beautiful Theory of Magnetism by rotation, the Transient Magnetic Energy 

 (as it was formerly termed) of different Metals, should bear a relation to their con- 

 ducting power of metals for electricity. This is most remarkably confirmed by the 

 following Table, given by Mr HARRIS in the Philosophical Transactions for 1831, 

 which most strikingly confirms the arrangement of conductors which I have given 

 in the text. 



Transient Magnetic Energy of the Metals. 



Rolled Silver, '-.-" :; .' 7i . ' <.' :; . 39 



Copper, .... 29 



Cast _..n 20 



Rolled Gold, 16 



Cast Zinc, . . . . ' \ ' 10 



Tin, . ;u ; ; ' '. .''': 6.9 



Lead, . :>. . . xf. . 3.7 



Antimony, ..... 1.3 



Bismuth, . 0.45 



* It is most probably from the great specific heat of iron that it stands so high 

 in the first column. 



