Bodies are repelled from the Poles of a Magnet. 17£i 



iron and of bismuth, more massive than those previously ex- 

 amined. 



These experiments can leave little doubt upon the mind, that 

 if a magnetic body be attracted in virtue of its being converted 

 into a magnet, a diamagnetic body is i-epelled m vhiue of its 

 being converted into a diamagnet. On no other assumption can 

 it be explained, why the repulsion of the diamagnetic body, like 

 the attraction of the magnetic one, increases in a so much quicker 

 ratio than the force of the magnet which produces the repulsion. 

 But, as this is a point of great importance, I will here introduce 

 corroborative evidence, derived from modes of experiment totally 

 different from the method already described. By a series of 

 measurements with the torsion balance, in which the attractive 

 and repulsive forces were determined directly, with the utmost 

 care, the relation of the strength of the magnet to the force 

 acting upon the substances named in Tables XL, XII., and XIII. 

 was found to be as follows : — 



Table XI. 



Spheres of native sulphur. 



Ratio of 



repulsions. 



952 



Strength of 

 magnet. 

 96 

 153 

 222 

 265 

 316 



1582 

 2242 

 2642 

 3162 



Table XII. 

 Spheres of carbonate of lime. 

 Strength of 



magnet. 

 134 

 172 

 213 

 259 

 310 

 370 



Ratio of 

 repulsions. 

 1342 

 1732 

 212* 

 2642 

 31P 

 3742 



