Bodies are repelled from the Poles of a Magnet. 163 



(Table 11. continued.) 



These experiments might be extended indefinitely, but suffi- 

 cient are here to enable us to deduce the law of action. In the 

 first place we notice, that all those substances which set equa- 

 torial between the points, and axial above and below them, are 

 diamagnetic ; while all those which set axial between the points, 

 and equatorial above and below them, are paramagnetic. Wlien 

 any one of the sub tanccs here named is reduced to the spherical 

 form, this rotation is not observed. I possess, for example, four 

 spheres of calcareous spar, and when any one of them is suspended 

 between the points, it takes up a position which is not changed 

 when the sphere is raised or lowered; the crystallographic axis 

 sets equatorial in all positions. A sphere of compressed car- 

 bonate of iron, sus])ended between the points, also sets that 

 diameter along which the pressure is exerted from pole to pole, 



